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4. Alternative Oxidase – Aid or obstacle to combat the rise of fungal pathogens?

Author

Edrich, Elizabeth, Duvenage, Lucian, Gourlay, Campbell W., Edrich, Elizabeth, Duvenage, Lucian, and Gourlay, Campbell W.

Abstract

Fungal pathogens present a growing threat to both humans and global health security alike. Increasing evidence of antifungal resistance in fungal populations that infect both humans and plant species has increased reliance on combination therapies and shown the need for new antifungal therapeutic targets to be investigated. Here, we review the roles of mitochondria and fungal respiration in pathogenesis and discuss the role of the Alternative Oxidase enzyme (Aox) in both human fungal pathogens and phytopathogens. Increasing evidence exists for Aox within mechanisms that underpin fungal virulence. Aox also plays important roles in adaptability that may prove useful within dual targeted fungal-specific therapeutic approaches. As improved fungal specific mitochondrial and Aox inhibitors are under development we may see this as an emerging target for future approaches to tackling the growing challenge of fungal infection.

Published
2024

10. Diacylglycerol triggers Rim101 pathway–dependent necrosis in yeast: a model for lipotoxicity

Author

Rockenfeller, Patrick, Smolnig, Martin, Diessl, Jutta, Bashir, Mina, Schmiedhofer, Vera, Knittelfelder, Oskar, Ring, Julia, Franz, Joakim, Foessl, Ines, Khan, Muhammad J., Rost, René, Graier, Wolfgang F., Kroemer, Guido, Zimmermann, Andreas, Carmona-Gutierrez, Didac, Eisenberg, Tobias, Büttner, Sabrina, Sigrist, Stephan J., Kühnlein, Ronald P., Kohlwein, Sepp D., Gourlay, Campbell W., and Madeo, Frank

Published
2018
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11. Elevated Levels of Mislocalised, Constitutive Ras Signalling Can Drive Quiescence by Uncoupling Cell-Cycle Regulation from Metabolic Homeostasis

Author

Piper-Brown, Elliot, Dresel, Fiona, Badr, Eman, Gourlay, Campbell W., Piper-Brown, Elliot, Dresel, Fiona, Badr, Eman, and Gourlay, Campbell W.

Abstract

The small GTPase Ras plays an important role in connecting external and internal signalling cues to cell fate in eukaryotic cells. As such, the loss of RAS regulation, localisation, or expression level can drive changes in cell behaviour and fate. Post-translational modifications and expression levels are crucial to ensure Ras localisation, regulation, function, and cell fate, exemplified by RAS mutations and gene duplications that are common in many cancers. Here, we reveal that excessive production of yeast Ras2, in which the phosphorylation-regulated serine at position 225 is replaced with alanine or glutamate, leads to its mislocalisation and constitutive activation. Rather than inducing cell death, as has been widely reported to be a consequence of constitutive Ras2 signalling in yeast, the overexpression of RAS2S225A or RAS2S225E alleles leads to slow growth, a loss of respiration, reduced stress response, and a state of quiescence. These effects are mediated via cAMP/PKA signalling and transcriptional changes, suggesting that quiescence is promoted by an uncoupling of cell-cycle regulation from metabolic homeostasis. The quiescent cell fate induced by the overexpression of RAS2S225A or RAS2S225E could be rescued by the deletion of CUP9, a suppressor of the dipeptide transporter Ptr2, or the addition of peptone, implying that a loss of metabolic control, or a failure to pass a metabolic checkpoint, is central to this altered cell fate. Our data suggest that the combination of an increased RAS2 copy number and a dominant active mutation that leads to its mislocalisation can result in growth arrest and add weight to the possibility that approaches to retarget RAS signalling could be employed to develop new therapies.

Published
2023

12. Discovery and Functional Analysis of the Single-Celled Yeast NADPH Oxidase, Yno1

Author

Pick, Edgar, Breitenbach, Michael, Rinnerthaler, Mark, Hasek, Jiri, Cullen, Paul J., Gourlay, Campbell W., Weber, Manuela, Breitenbach-Koller, Hannelore, Pick, Edgar, Breitenbach, Michael, Rinnerthaler, Mark, Hasek, Jiri, Cullen, Paul J., Gourlay, Campbell W., Weber, Manuela, and Breitenbach-Koller, Hannelore

Abstract

In this chapter, we describe the discovery of the NADPH oxidase gene and protein of the single-celled yeast Saccharomyces cerevisiae, Yno1. This enzyme was characterized with respect to mechanism of action, subcellular location, regulation of gene expression, and physiological function. Yno1 is not involved in defense and is not highly expressed in vegetatively growing cells. However, it is expressed in diverse stress situations. The signaling substance produced by Yno1 in conjunction with the superoxide dismutase Sod1, hydrogen peroxide, consequently leads through a change in the expression of target genes to the modulation of an adaptive cellular response. An example is the formation of pseudohyphae enabling invasive growth of the yeast cells, which is believed to aid in the utilization of new nutrients. The major role of Yno1 is in the switch of the mode of growth from vegetative budding to the formation of pseudohyphae, which are elongated chains of cells. Further examples that are described in this chapter are the response to osmotic stress and mating. All these pathways have in common that they exit the regular cell cycle and are associated with in parts enormous changes in cell morphology. This is accomplished involving a change in the structure of the actin cytoskeleton. Yno1 was shown to directly modulate the actin cytoskeleton.

Published
2023

14. Yno1p/Aim14p, a NADPH-oxidase ortholog, controls extramitochondrial reactive oxygen species generation, apoptosis, and actin cable formation in yeast

Author

Rinnerthaler, Mark, Büttner, Sabrina, Laun, Peter, Heeren, Gino, Felder, Thomas K., Klinger, Harald, Weinberger, Martin, Stolze, Klaus, Grousl, Tomas, Hasek, Jiri, Benada, Oldrich, Frydlova, Ivana, Klocker, Andrea, Simon-Nobbe, Birgit, Jansko, Bettina, Breitenbach-Koller, Hannelore, Eisenberg, Tobias, Gourlay, Campbell W., Madeo, Frank, Burhans, William C., and Breitenbach, Michael

Published
2012

17. Mitochondrial physiology: Gnaiger Erich et al ― MitoEAGLE Task Group

Author

Gnaiger, Erich, Aasander Frostner, Eleonor, Abdul Karim, Norwahidah, Abdel-Rahman, Engy Ali, Abumrad, Nada A, Acuna-Castroviejo, Dario, Adiele, Reginald C, Ahn, Bumsoo, Alencar, MB, Ali, Sameh S, Almeida, Angeles, Alton, Lesley, Alves, Marco G, Amati, Francesca, Amoedo, Nivea Dias, Amorim, Ricardo, Anderson, Ethan J, Andreadou, Ioanna, Antunes, Diana, Arago, Marc, Aral, Cenk, Arandarcikaite, Odeta, Arias-Reyes, Christian, Armand, Anne-Sophie, Arnould, Thierry, Avram, Vlad Florian, Axelrod, Christopher L, Bairam, Aida, Bailey, Damian M, Bajpeyi, Sudip, Bajzikova, Martina, Bakker, Barbara M, Barlow, Jonathan, Bardal, Tora, Banni, A, Bastos Sant'Anna Silva, Ana Carolina, Batterson, Philip, Battino, Maurizio, Bazil, Jason, Beard, Daniel A, Beleza, Jorge, Bednarczyk, Piotr, Bello, Fiona, Ben-Shachar, Dorit, Bento Guida, Jose Freitas, Bergdahl, Andreas, Berge, Rolf K, Bergmeister, Lisa, Bernardi, Paolo, Berridge, Michael V, Bettinazzi, Stefano, Bishop, David, Blier, Pierre U, Blindheim, Dan Filip, Boardman, Neoma T, Boetker, Hans Erik, Borchard, Sabine, Boros, Mihaly, Borsheim, Elisabet, Borras, Consuelo, Borutaite, Vilma, Botella, Javier, Bouillaud, Frederic, Bouitbir, Jamal, Boushel, Robert C, Bovard, Josh, Bravo-Sagua, Roberto, Breton, Sophie, Brown, David A, Brown, Guy C, Brown, Robert A, Brozinick, Joseph T, Buettner, Garry R, Burtscher, Johannes, Bustos, Matilde, Calabria, Elisa, Calbet, Jose A, Calzia, Enrico, Cannon, Daniel T, Cano Sanchez, Maria, Canto Alvarez, Carles, Cardinale, D, Cardoso, Luiza Helena Daltro, Carvalho, Eugenia, Casado Pinna, Marta, Cassar, Samantha, Castelo, Maria P, Castilho, Roger F, Cavalcanti-de-Albuquerque, Joao Paulo, Cecatto, Cristiane, Celen, Murat C, Cervinkova, Zuzana, Chabi, Beatrice, Chakrabarti, Lisa, Chakrabarti, Sasanka, Chaurasia, Bhagirath, Chen, Quan, Chicco, Adam J, Chinopoulos, Christos, Chowdhury, Subir K, Cizmarova, Beata, Clementi, Emilio, Coen, Paul M, Cohen, Bruce H, Coker, Robert H, Collin-Chenot, Anne, Coughlan, Melinda T, Coxito, Petro, Crisostomo, Luis, Crispim, Marcell, Crossland, Hannah, Dahdah, Norma, Dalgaard, Louise T, Dambrova, Maija, Danhelovska, Tereza, Darveau, Charles A, Darwin, Paula M, Das, Anibh M, Dash, Ranjan K, Davidova, Eliska, Davis, Michael S, Dayanidhi, Sudarshan, De Bem, Andreza Fabro, De Goede, Paul, De Palma, Clara, De Pinto, Vito, Dela, F, Dembinska-Kiec, Aldona, Detraux, Damien, Devaux, Yvan, Di Marcello, Marco, Di Paola, Floriana Jessica, Dias, Candida, Dias, Tania R, Diederich, Marc, Distefano, Giovanna, Djafarzadeh, Siamak, Doermann, Niklas, Doerrier, Carolina, Dong, Lan-Feng, Donnelly, Chris, Drahota, Zdenek, Duarte, Filipe Valente, Dubouchaud, Herve, Duchen, Michael R, Dumas, Jean-Francois, Durham, William J, Dymkowska, Dorota, Dyrstad, Sissel E, Dyson, Alex, Dzialowski, Edward M, Eaton, Simon, Ehinger, Johannes, Elmer, Eskil, Endlicher, Rene, Engin, Ayse B, Escames, Germaine, Evinova, Andrea, Ezrova, Zuzana, Falk, Marni Joy, Fell, David A, Ferdinandy, Peter, Ferko, Miroslav, Fernandez-Ortiz, Marisol, Erika, Fernandez-Vizarra, Ferreira, Julio Cesar Batista, Ferreira, Rita, Ferri, Alessandra, Festuccia, WT, Fessel, Joshua P, Filipovska, Aleksandra, Fisar, Zdenek, Fischer, Christine, Fischer, Michael, Fisher, Gordon, Fisher, Joshua J, Fontanesi, Flavia, Forbes-Hernandez, Tamara Y, Ford, Ellen, Fornaro, Mara, Fuertes Agudo, Marina, Fulton, Montana, Galina, Antonio, Galkin, Alexander, Gallee, Leon, Galli, Gina L, Gama Perez, Pau, Gan, Zhenji, Ganetzky, Rebecca, Gao, Yun, Garcia, Geovana S, Garcia-Rivas, Gerardo, Garcia-Roves, Pablo Miguel, Garcia-Souza, Luiz Felipe, Garlid, Keith D, Garrabou, Gloria, Garten, Antje, Gastaldelli, Amalia, Gayen, Jiaur, Genders, Amanda J, Genova, Maria Luisa, Giampieri, Francesca, Glatz, Jan FC, Giovarelli, Matteo, Goikoetxea Usandizaga, Naroa, Goncalo Teixeira da Silva, Rui, Goncalves, Debora Farina, Gonzalez-Armenta, Jenny L, Gonzalez-Francesqua, A, Gonzalez-Freire, Marta, Gonzalo, Hugo, Goodpaster, Bret H, Gorr, Thomas A, Gourlay, Campbell W, Grams, Bente, Granata, Cesare, Grefte, Sander, Grilo, Luis, Guarch, Meritxell Espino, Gueguen, Naig, Gumeni, Sentiljana, Haas, Clarissa B, Haavik, Jan, Hachmo, Yafit, Haendeler, Judith, Haider, Markus, Hajrulahovic, Anesa, Hamann, Andrea, Han, Jin, Han, Woo Hyun, Hancock, Chad R, Hand, Steven C, Handl, Jiri, Hansikova, Hana, Hardee, Justin P, Hargreaves, Ian P, Harper, Mary Ellen, Harrison, David K, Hassan, Hazirah, Hatakova, Zuzana, Hausenloy, Derek J, Heales, Simon JR, Heiestad, Christina, Hellgren, Kim T, Henrique, Alexandrino, Hepple, Russell T, Hernansanz-Agustin, Pablo, Hewakapuge, Sudinna, Hickey, Anthony J, Ho, Dieu Hien, Hoehn, Kyle L, Hoel, Frederik, Holland, Olivia J, Holloway, Graham P, Holzner, Lorenz, Hoppel, Charles L, Hoppeler, H, Hoppel, Florian, Houstek, Josef, Huete-Ortega, Maria, Hyrossova, Petra, Iglesias-Gonzalez, Javier, Indiveri, Cesare, Irving, Brian A, Isola, Raffaella, Iyer, Shilpa, Jackson, Christophe B, Jadiya, Pooja, Jana, Prado Fabian, Jandeleit-Dahm, K, Jang, David H, Jang, Young C, Janowska, Joanna, Jansen, Kirsten, Jansen-Duerr, Pidder, Jansone, Baiba, Jarmuszkiewicz, Wieslawa, Jaskiewicz, Anna, Jaspers, Richard T, Jedlicka, Jan, Jerome, Estaquier, Jespersen, Nichlas R, Jha, Rajan K, Joseph, Vincent, Juhasz, Laszlo, Jurczak, Michael J, Jurk, Diana, Kaambre, Tuuli, Kaczor, Jan J, Kainulainen, Heikki, Kampa, Rafal Pawel, Kandel, Sunil M, Kane, Daniel A, Kapferer, Werner, Kapnick, Senta, Kappler, Lisa, Karabatsiakis, Alexander, Karavaeva, Iuliia, Karkucinska-Wieckowska, Agnieszka, Kaur, Sarbjot, Keijer, Jaap, Keller, Markus A, Keppner, Gloria, Khamoui, Andy V, Kidere, Dita, Kilbaugh, Todd, Kim, Hyoung Kyu, Kim, Julian KS, Kimoloi, Sammy, Klepinin, Aleksandr, Klepinina, Lyudmila, Klingenspor, Martin, Klocker, Helmut, Komlódi, Timea, Kolasa, Iris, Koopman, Werner JH, Kopitar-Jerala, Natasa, Kowaltowski, Alicia J, Kozlov, Andrey V, Krajcova, Adela, Krako Jakovljevic, Nina, Kristal, Bruce S, Krycer, Jamer R, Kuang, Jujiao, Kucera, Otto, Kuka, Janis, Kwak, Hyo Bum, Kwast, Kurt, Kwon, Oh Sung, Laasmaa, Martin, Labieniec-Watala, Magdalena, Lai, Nicola, Lalic, Nebojsa M, Land, John M, Lane, Nick, Laner, Verena, Lanza, Ian R, Laouafa, Sofien, Larsen, Steen, Larsen, Terje S, Lavery, Gareth G, Lazou, Antigone, Ledo, Ana Margarida, Lee, Hong Kyu, Leeuwenburgh, Christiaan, Lehti, Maarit, Lemieux, Helene, Lenaz, Giorgio, Lerfall, Jorgen, Li, Pingan A, Li Puma, Lance, Liang, Liping, Liepins, Edgars, Lin, Chien-Te, Liu, Jiankang, Lopez, Luis C, Lucchinetti, Eliana, Ma, Tao, Macedo, Maria P, Machado, Ivo F, Maciej, Sarah, MacMillan-Crow, Lee Ann, Magalhaes, Jose, Magri, Andrea, Majtnerova, Pavlina, Makarova, Elina, Makrecka-Kuka, Marina, Malik, Afshan N, Marcouiller, Francois, Marechal, Amandine, Markova, Michaela, Markovic, Ivanka, Martin, Daniel S, Martins, Ana Dias, Martins, Joao D, Maseko, Tumisang Edward, Maull, Felicia, Mazat, Jean Pierre, McKenna, Helen T, McKenzie, Matthew, McMillan, Duncan GG, McStay, Gavin P, Menze, Michael A, Mendham, Amy, Mercer, John R, Merz, Tamara, Messina, Angela, Meszaros, Andras T, Methner, Axel, Michalak, Slawomir, Mila Guasch, Maria, Minuzzi, Luciele M, Misirkic Marjanovic, Maja, Moellering, Douglas R, Moisoi, Nicoleta, Molina, Anthony JA, Montaigne, David, Moore, Anthony L, Moore, Christy, Moreau, Kerrie, Moreira, Bruno P, Moreno-Sanchez, Rafael, Mracek, Tomas, Muccini, Anna Maria, Muntane, Jordi, Muntean, Danina M, Murray, Andrew J, Musiol, Eva, Nabben, Miranda, Nair, K Sreekumaran, Nehlin, Jan O, Nemec, Michal, Nesci, Salvatore, Neufer, P Darrell, Neuzil, Jiri, Neviere, Remi, Newsom, Sean A., Norman, Jennifer, Nozickova, Katerina, Nunes, Sara, Nuoffer, Jean-Marc, O'Brien, Kristin, O'Brien, Katie A, O'Gorman, Donal, Olgar, Yusuf, Oliveira, Ben, Oliveira, Jorge, Oliveira, Marcus F, Oliveira, Marcos Tulio, Oliveira, Pedro F, Oliveira, Paulo J, Olsen, Rolf Erik, Orynbayeva, Zulfiya, Osiewacz, Heinz D, Paez, Hector, Pak, Youngmi K, Pallotta, Maria L, Palmeira, Carlos M, Parajuli, Nirmala, Passos, Joao F, Passrugger, Manuela, Patel, Hemal H, Pavlova, Nadia, Pavlovic, Kasja, Pecina, Petr, Pedersen, Tina M, Perales, Jose Carlos, Pereira da Silva Grilo da Silva, Filomena, Pereira, Rita, Perez Valencia, Juan A, Perks, Kara L, Pesta, Dominik, Petit, Patrice X, Pettersen Nitschke, Ina Katrine, Pichaud, Nicolas, Pichler, Irene, Piel, Sarah, Pietka, Terri A, Pinho, Sonia A, Pino, Maria F, Pirkmajer, Sergej, Place, Nicolas, Plangger, Mario, Porter, Craig, Porter, Richard K, Preguica, Ines, Procaccio, Vincent, Prochownik, Edward V, Prola, Alexandre, Pulinilkunnil, Thomas, Puskarich, Michael A, Puurand, Marju, Radenkovic, Filip, Ramzan, Rabia, Rattan, Suresh IS, Reano, Simone, Reboredo, Patricia, Rees, Bernard B, Renner-Sattler, Kathrin, Rial, Eduardo, Robinson, Matthew M, Roden, Michael, Rodrigues, Ana Sofia, Rodriguez, Enrique, Rodriguez-Enriquez, Sara, Roesland, Gro Vatne, Rolo, Anabela Pinto, Ropelle, Eduardo R, Roshanravan, Baback, Rossignol, Rodrigue, Rossiter, Harry B, Rousar, Tomas, Rubelj, Ivica, Rybacka-Mossakowska, Joanna, Saada, Ann, Safaei, Zahra, Sarlak, Saharnaz, Salin, Karine, Salvadego, Desy, Sandi, Carmen, Saner, Nicholas, Santos, Diana, Sanz, Alberto, Sardao, Vilma, Sazanov, Leonid A, Scaife, Paula, Scatena, Roberto, Schartner, Melanie, Scheibye-Knudsen, Morten, Schilling, Jan M, Schlattner, Uwe, Schmitt, Sabine, Schneider Gasser, Edith Mariane, Schoenfeld, Peter, Schots, Pauke C, Schulz, Rainer, Schwarzer, Christoph, Scott, Graham R, Selman, Colin, Sendon, Pamella Marie, Shabalina, Irina G, Sharma, Pushpa, Sharma, Vipin, Shevchuk, Igor, Shirazi, Reza, Shiroma, Jonathan G, Siewiera, Karolina, Silber, Ariel M, Silva, Ana Maria, Sims, Carrie A, Singer, Dominique, Singh, Brijesh Kumar, Skolik, Robert A, Smenes, Benedikte Therese, Smith, James, Soares, Félix Alexandre Antunes, Sobotka, Ondrej, Sokolova, Inna, Solesio Torregrosa, M De la Encarnacion, Soliz, Jorge, Sonkar, Vijay K, Sova, Marina, Sowton, Alice P, Sparagna, Genevieve C, Sparks, Lauren M, Spinazzi, Marco, Stankova, Pavla, Starr, Jonathan, Stary, Creed, Stefan, Eduard, Stelfa, Gundega, Stepto, Nigel K, Stevanovic, Jelena, Stiban, Johnny, Stier, Antoine, Stocker, Roland, Storder, Julie, Sumbalova, Zuzana, Suomalainen, Wartiovaara Anu, Suravajhala, Prashanth, Svalbe, Baiba, Swerdlow, Russel H, Swiniuch, Daria, Szabo, Ildiko, Szewczyk, Adam, Szibor, Marten, Tanaka, Masashi, Tandler, Bernard, Tarnopolsky, Mark A, Tausan, Daniel, Tavernarakis, Nektarios, Tepp, Kersti, Teodoro, J, Thakkar, Himani, Thapa, Maheshwo, Thyfault, John P, Tomar, Dhanendra, Ton, Riccardo, Torp, May-Kristin, Torres-Quesada, Omar, Towheed, Atif, Treberg, Jason R, Tretter, Laszlo, Trewin, Adam J, Trifunovic, Aleksandra, Trivigno, Catherine, Tronstad, Karl Johan, Trougakos, Ioannis P, Truu, Laura, Tuncay, Erkan, Turan, Belma, Tyrrell, Daniel J, Urban, Tomas, Urner, Sofia, Valentine, Joseph Marco, Van Bergen, Nicole J, Van der Ende, Miranda, Varricchio, Frederick, Vaupel, Peter, Vella, Joanna, Vendelin, Marko, Verdaguer, IB, Vercesi, Anibal E, Vernerova, Andrea, Victor, Victor Manuel, Vieira Ligo Teixeira, Camila, Vidimce, Josif, Viel, Christian, Vieyra, Adalberto, Vilks, Karlis, Villena, Joseph A, Vincent, Vinnyfred, Vinogradov, Andrey D, Viscomi, Carlo, Vitorino, Rui Miguel Pinheiro, Vlachaki Walker, Julia, Vogt, Sebastian, Volani, Chiara, Volska, Kristine, Votion, Dominique-Marie, Vujacic-Mirski, Ksenija, Wagner, Brett A, Ward, Marie Louise, Warnsmann, Verena, Wasserman, David H, Watala, Cezary, Wei, Yau-Huei, Weinberger, Klaus M, White, Sarah, Whitfield, Jamie, Wickert, Anika, Wieckowski, Mariusz R, Wiesner, Rudolf J, Williams, Caroline M, Winwood-Smith, Hugh, Wohlgemuth, Stephanie E, Wohlwend, Martin, Wolff, Jonci Nikolai, Wrutniak-Cabello, Chantal, Wuest, Rob C I, Yokota, Takashi, Zablocki, Krzysztof, Zanon, Alessandra, Zanou, Nadege, Zaugg, Kathrin, Zaugg, Michael, Zdrazilova, Lucie, Zhang, Yong, Zhang, Yi Zhu, Zikova, Alena, Zischka, Hans, Zorzano, Antonio, Zujovic, Tijana, Zurmanova, Jitka, Zvejniece, Liga, Lagarrigue, Sylviane, Munro, Daniel, Pereira, Susana, Laranjinha, Joäo, Hecker, Matthias, Jusic, Amela, Prigione, Alessandro, Sommer, Natascha, Weissig, Volkmar, Guida, Bento, G, John G, Jones, JG, AMS - Tissue Function & Regeneration, AMS - Rehabilitation & Development, Physiology, Mito-Eagle - Evolution-Age-Gender-Lifestyle-Environment (Mito-Eagle), Oroboros Instruments, Dynamique Musculaire et Métabolisme (DMEM), Université de Montpellier (UM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Gnaiger Erich, Aasander Frostner Eleonor, Abdul Karim Norwahidah, Abdel-Rahman Engy Ali, Abumrad Nada A, Acuna-Castroviejo Dario, Adiele Reginald C, Ahn Bumsoo, Alencar Mayke Bezerra, Ali Sameh S, Almeida Angeles, Alton Lesley, Alves Marco G, Amati Francesca, Amoedo Nivea Dias, Amorim Ricardo, Anderson Ethan J, Andreadou Ioanna, Antunes Diana, Arago Marc, Aral Cenk, Arandarcikaite Odeta, Arias-Reyes Christian, Armand Anne-Sophie, Arnould Thierry, Avram Vlad F, Axelrod Christopher L, Bailey Damian M, Bairam Aida, Bajpeyi Sudip, Bajzikova Martina, Bakker Barbara M, Banni Aml, Bardal Tora, Barlow J, Bastos Sant'Anna Silva Ana Carolina, Batterson Philip M, Battino Maurizio, Bazil Jason N, Beard Daniel A, Bednarczyk Piotr, Beleza Jorge, Bello Fiona, Ben-Shachar Dorit, Bento Guida Jose Freitas, Bergdahl Andreas, Berge Rolf K, Bergmeister Lisa, Bernardi Paolo, Berridge Michael V, Bettinazzi Stefano, Bishop David J, Blier Pierre U, Blindheim Dan Filip, Boardman Neoma T, Boetker Hans Erik, Borchard Sabine, Boros Mihaly, Boersheim Elisabet, Borras Consuelo, Borutaite Vilma, Botella Javier, Bouillaud Frederic, Bouitbir Jamal, Boushel Robert C, Bovard Josh, Bravo-Sagua Roberto, Breton Sophie, Brown David A, Brown Guy C, Brown Robert Andrew, Brozinick Joseph T, Buettner Garry R, Burtscher Johannes, Bustos Matilde, Calabria Elisa, Calbet Jose AL, Calzia Enrico, Cannon Daniel T, Cano Sanchez Maria Consolacion, Canto Alvarez Carles, Cardinale Daniele A, Cardoso Luiza HD, Carvalho Eugenia, Casado Pinna Marta, Cassar Samantha, Castelo Rueda Maria Paulina, Castilho Roger F, Cavalcanti-de-Albuquerque Joao Paulo, Cecatto Cristiane, Celen Murat C, Cervinkova Zuzana, Chabi Beatrice, Chakrabarti Lisa, Chakrabarti Sasanka, Chaurasia Bhagirath, Chen Quan, Chicco Adam J, Chinopoulos Christos, Chowdhury Subir Kumar, Cizmarova Beata, Clementi Emilio, Coen Paul M, Cohen Bruce H, Coker Robert H, Collin-Chenot Anne, Coughlan Melinda T, Coxito Pedro, Crisostomo Luis, Crispim Marcell, Crossland Hannah, Dahdah Norma Ramon, Dalgaard Louise T, Dambrova Maija, Danhelovska Tereza, Darveau Charles-A, Darwin Paula M, Das Anibh Martin, Dash Ranjan K, Davidova Eliska, Davis Michael S, Dayanidhi Sudarshan, De Bem Andreza Fabro, De Goede Paul, De Palma Clara, De Pinto Vito, Dela Flemming, Dembinska-Kiec Aldona, Detraux Damian, Devaux Yvan, Di Marcello Marco, Di Paola Floriana Jessica, Dias Candida, Dias Tania R, Diederich Marc, Distefano Giovanna, Djafarzadeh Siamak, Doermann Niklas, Doerrier Carolina, Dong Lan-Feng, Donnelly Chris, Drahota Zdenek, Duarte Filipe Valente, Dubouchaud Herve, Duchen Michael R, Dumas Jean-Francois, Durham William J, Dymkowska Dorota, Dyrstad Sissel E, Dyson Alex, Dzialowski Edward M, Eaton Simon, Ehinger Johannes K, Elmer Eskil, Endlicher Rene, Engin Ayse Basak, Escames Germaine, Evinova Andrea, Ezrova Zuzana, Falk Marni J, Fell David A, Ferdinandy Peter, Ferko Miroslav, Fernandez-Ortiz Marisol, Fernandez-Vizarra Erika, Ferreira Julio Cesar B, Ferreira Rita Maria P, Ferri Alessandra, Fessel Joshua Patrick, Festuccia William T, Filipovska Aleksandra, Fisar Zdenek, Fischer Christine, Fischer Michael J, Fisher Gordon, Fisher Joshua J, Fontanesi Flavia, Forbes-Hernandez Tamara Y, Ford Ellen, Fornaro Mara, Fuertes Agudo Marina, Fulton Montana, Galina Antonio, Galkin Alexander, Gallee Leon, Galli Gina L J, Gama Perez Pau, Gan Zhenji, Ganetzky Rebecca, Gao Yun, Garcia Geovana S, Garcia-Rivas Gerardo, Garcia-Roves Pablo Miguel, Garcia-Souza Luiz F, Garlid Keith D, Garrabou Gloria, Garten Antje, Gastaldelli Amalia, Gayen Jiaur, Genders Amanda J, Genova Maria Luisa, Giampieri Francesca, Giovarelli Matteo, Glatz Jan FC, Goikoetxea Usandizaga Naroa, Goncalo Teixeira da Silva Rui, Goncalves Debora Farina, Gonzalez- Armenta Jenny L, Gonzalez-Franquesa Alba, Gonzalez-Freire Marta, Gonzalo Hugo, Goodpaster Bret H, Gorr Thomas A, Gourlay Campbell W, Grams Bente, Granata Cesare, Grefte Sander, Grilo Luis, Guarch Meritxell Espino, Gueguen Naig, Gumeni Sentiljana, Haas Clarissa, Haavik Jan, Hachmo Yafit, Haendeler Judith, Haider Markus, Hajrulahovic Anesa, Hamann Andrea, Han Jin, Han Woo Hyun, Hancock Chad R, Hand Steven C, Handl Jiri, Hansikova Hana, Hardee Justin P, Hargreaves Iain P, Harper Mary- Ellen, Harrison David K, Hassan Hazirah, Hatokova Zuzana, Hausenloy Derek J, Heales Simon JR, Hecker Matthias, Heiestad Christina, Hellgren Kim T, Henrique Alexandrino, Hepple Russell T, Hernansanz- Agustin Pablo, Hewakapuge Sudinna, Hickey Anthony J, Ho Dieu Hien, Hoehn Kyle L, Hoel Fredrik, Holland Olivia J, Holloway Graham P, Holzner Lorenz, Hoppel Charles L, Hoppel Florian, Hoppeler Hans, Houstek Josef, Huete-Ortega Maria, Hyrossova Petra, Iglesias-Gonzalez Javier, Indiveri Cesare, Irving Brian A, Isola Raffaella, Iyer Shilpa, Jackson Christopher Benjamin, Jadiya Pooja, Jana Prado Fabian, Jandeleit-Dahm Karin, Jang David H, Jang Young Charles, Janowska Joanna, Jansen Kirsten M, Jansen-Duerr Pidder, Jansone Baiba, Jarmuszkiewicz Wieslawa, Jaskiewicz Anna, Jaspers Richard T, Jedlicka Jan, Jerome Estaquier, Jespersen Nichlas Riise, Jha Rajan Kumar, Jones John G, Joseph Vincent, Juhasz Laszlo, Jurczak Michael J, Jurk Diana, Jusic Amela, Kaambre Tuuli, Kaczor Jan Jacek, Kainulainen Heikki, Kampa Rafal Pawel, Kandel Sunil Mani, Kane Daniel A, Kapferer Werner, Kapnick Senta, Kappler Lisa, Karabatsiakis Alexander, Karavaeva Iuliia, Karkucinska-Wieckowska Agnieszka, Kaur Sarbjot, Keijer Jaap, Keller Markus A, Keppner Gloria, Khamoui Andy V, Kidere Dita, Kilbaugh Todd, Kim Hyoung Kyu, Kim Julian KS, Kimoloi Sammy, Klepinin Aleksandr, Klepinina Lyudmila, Klingenspor Martin, Klocker Helmut, Kolassa Iris, Komlodi Timea, Koopman Werner JH, Kopitar-Jerala Natasa, Kowaltowski Alicia J, Kozlov Andrey V, Krajcova Adela, Krako Jakovljevic Nina, Kristal Bruce S, Krycer James R, Kuang Jujiao, Kucera Otto, Kuka Janis, Kwak Hyo Bum, Kwast Kurt E, Kwon Oh Sung, Laasmaa Martin, Labieniec-Watala Magdalena, Lagarrigue Sylviane, Lai Nicola, Lalic Nebojsa M, Land John M, Lane Nick, Laner Verena, Lanza Ian R, Laouafa Sofien, Laranjinha Joao, Larsen Steen, Larsen Terje S, Lavery Gareth G, Lazou Antigone, Ledo Ana Margarida, Lee Hong Kyu, Leeuwenburgh Christiaan, Lehti Maarit, Lemieux Helene, Lenaz Giorgio, Lerfall Joergen, Li Pingan Andy, Li Puma Lance, Liang Liping, Liepins Edgars, Lin Chien-Te, Liu Jiankang, Lopez Garcia Luis Carlos, Lucchinetti Eliana, Ma Tao, Macedo Maria Paula, Machado Ivo F, Maciej Sarah, MacMillan-Crow Lee Ann, Magalhaes Jose, Magri Andrea, Majtnerova Pavlina, Makarova Elina, Makrecka-Kuka Marina, Malik Afshan N, Marcouiller Francois, Marechal Amandine, Markova Michaela, Markovic Ivanka, Martin Daniel S, Martins Ana Dias, Martins Joao D, Maseko Tumisang Edward, Maull Felicia, Mazat Jean-Pierre, McKenna Helen T, McKenzie Matthew, McMillan Duncan GG, McStay Gavin P, Mendham Amy, Menze Michael A, Mercer John R, Merz Tamara, Messina Angela, Meszaros Andras, Methner Axel, Michalak Slawomir, Mila Guasch Maria, Minuzzi Luciele M, Misirkic Marjanovic Maja, Moellering Douglas R, Moisoi Nicoleta, Molina Anthony JA, Montaigne David, Moore Anthony L, Moore Christy, Moreau Kerrie, Moreira Bruno P, Moreno-Sanchez Rafael, Mracek Tomas, Muccini Anna Maria, Munro Daniel, Muntane Jordi, Muntean Danina M, Murray Andrew James, Musiol Eva, Nabben Miranda, Nair K Sreekumaran, Nehlin Jan O, Nemec Michal, Nesci Salvatore, Neufer P Darrell, Neuzil Jiri, Neviere Remi, Newsom Sean A, Norman Jennifer, Nozickova Katerina, Nunes Sara, Nuoffer Jean-Marc, O'Brien Kristin, O'Brien Katie A, O'Gorman Donal, Olgar Yusuf, Oliveira Ben, Oliveira Jorge, Oliveira Marcus F, Oliveira Marcos Tulio, Oliveira Pedro Fontes, Oliveira Paulo J, Olsen Rolf Erik, Orynbayeva Zulfiya, Osiewacz Heinz D, Paez Hector, Pak Youngmi Kim, Pallotta Maria Luigia, Palmeira Carlos, Parajuli Nirmala, Passos Joao F, Passrugger Manuela, Patel Hemal H, Pavlova Nadia, Pavlovic Kasja, Pecina Petr, Pedersen Tina M, Perales Jose Carles, Pereira da Silva Grilo da Silva Filomena, Pereira Rita, Pereira Susana P, Perez Valencia Juan Alberto, Perks Kara L, Pesta Dominik, Petit Patrice X, Pettersen Nitschke Ina Katrine, Pichaud Nicolas, Pichler Irene, Piel Sarah, Pietka Terri A, Pinho Sonia A, Pino Maria F, Pirkmajer Sergej, Place Nicolas, Plangger Mario, Porter Craig, Porter Richard K, Preguica Ines, Prigione Alessandro, Procaccio Vincent, Prochownik Edward V, Prola Alexandre, Pulinilkunnil Thomas, Puskarich Michael A, Puurand Marju, Radenkovic Filip, Ramzan Rabia, Rattan Suresh IS, Reano Simone, Reboredo-Rodriguez Patricia, Rees Bernard B, Renner-Sattler Kathrin, Rial Eduardo, Robinson Matthew M, Roden Michael, Rodrigues Ana Sofia, Rodriguez Enrique, Rodriguez-Enriquez Sara, Roesland Gro Vatne, Rohlena Jakub, Rolo Anabela Pinto, Ropelle Eduardo R, Roshanravan Baback, Rossignol Rodrigue, Rossiter Harry B, Rousar Tomas, Rubelj Ivica, Rybacka-Mossakowska Joanna, Saada Reisch Ann, Safaei Zahra, Salin Karine, Salvadego Desy, Sandi Carmen, Saner Nicholas, Santos Diana, Sanz Alberto, Sardao Vilma, Sarlak Saharnaz, Sazanov Leonid A, Scaife Paula, Scatena Roberto, Schartner Melanie, Scheibye-Knudsen Morten, Schilling Jan M, Schlattner Uwe, Schmitt Sabine, Schneider Gasser Edith Mariane, Schoenfeld Peter, Schots Pauke C, Schulz Rainer, Schwarzer Christoph, Scott Graham R, Selman Colin, Sendon Pamella Marie, Shabalina Irina G, Sharma Pushpa, Sharma Vipin, Shevchuk Igor, Shirazi Reza, Shiroma Jonathan G, Siewiera Karolina, Silber Ariel M, Silva Ana Maria, Sims Carrie A, Singer Dominique, Singh Brijesh Kumar, Skolik Robert A, Smenes Benedikte Therese, Smith James, Soares Felix Alexandre Antunes, Sobotka Ondrej, Sokolova Inna, Solesio Maria E, Soliz Jorge, Sommer Natascha, Sonkar Vijay K, Sova Marina, Sowton Alice P, Sparagna Genevieve C, Sparks Lauren M, Spinazzi Marco, Stankova Pavla, Starr Jonathan, Stary Creed, Stefan Eduard, Stelfa Gundega, Stepto Nigel K, Stevanovic Jelena, Stiban Johnny, Stier Antoine, Stocker Roland, Storder Julie, Sumbalova Zuzana, Suomalainen Anu, Suravajhala Prashanth, Svalbe Baiba, Swerdlow Russell H, Swiniuch Daria, Szabo Ildiko, Szewczyk Adam, Szibor Marten, Tanaka Masashi, Tandler Bernard, Tarnopolsky Mark A, Tausan Daniel, Tavernarakis Nektarios, Teodoro Joao Soeiro, Tepp Kersti, Thakkar Himani, Thapa Maheshwor, Thyfault John P, Tomar Dhanendra, Ton Riccardo, Torp May-Kristin, Torres-Quesada Omar, Towheed Atif, Treberg Jason R, Tretter Laszlo, Trewin Adam J, Trifunovic Aleksandra, Trivigno Catherine, Tronstad Karl Johan, Trougakos Ioannis P, Truu Laura, Tuncay Erkan, Turan Belma, Tyrrell Daniel J, Urban Tomas, Urner Sofia, Valentine Joseph Marco, Van Bergen Nicole J, Van der Ende Miranda, Varricchio Frederick, Vaupel Peter, Vella Joanna, Vendelin Marko, Vercesi Anibal E, Verdaguer Ignasi Bofill, Vernerova Andrea, Victor Victor Manuel, Vieira Ligo Teixeira Camila, Vidimce Josif, Viel Christian, Vieyra Adalberto, Vilks Karlis, Villena Josep A, Vincent Vinnyfred, Vinogradov Andrey D, Viscomi Carlo, Vitorino Rui Miguel Pinheiro, Vlachaki Walker Julia, Vogt Sebastian, Volani Chiara, Volska Kristine, Votion Dominique-Marie, Vujacic-Mirski Ksenija, Wagner Brett A, Ward Marie Louise, Warnsmann Verena, Wasserman David H, Watala Cezary, Wei Yau-Huei, Weinberger Klaus M, Weissig Volkmar, White Sarah Haverty, Whitfield Jamie, Wickert Anika, Wieckowski Mariusz R, Wiesner Rudolf J, Williams Caroline M, Winwood-Smith Hugh, Wohlgemuth Stephanie E, Wohlwend Martin, Wolff Jonci Nikolai, Wrutniak-Cabello Chantal, Wuest Rob CI, Yokota Takashi, Zablocki Krzysztof, Zanon Alessandra, Zanou Nadege, Zaugg Kathrin, Zaugg Michael, Zdrazilova Lucie, Zhang Yong, Zhang Yizhu, Zikova Alena, Zischka Hans, Zorzano Antonio, Zujovic Tijana, Zurmanova Jitka, Zvejniece Liga

Subjects
uncoupling, MitoPedia: Respiratory states, SI - The International System of Units, IUPAC, Coupling control, Mitochondrial preparations, Protonmotive force, Uncoupling, Oxidative phosphorylation, Phosphorylation efficiency, Electron transfer-pathway, LEAK-respiration, Residual oxygen consumption, Normalization of rate, Flow, Flux, Flux control ratio, Mitochondrial marker, Cell count, Oxygen, [SDV]Life Sciences [q-bio], coupling control, protonmotive force, oxidative phosphorylation, mitochondrial respiratory control, State 4, electron transfer, State 2, State 3, Mitochondrial physiology, residual oxygen consumption, flux, normalization, ion leak and slip compensatory state, efficiency, electron transfer system, flow, mitochondrial physiology, oxygen, mitochondrial preparations, proton leak
Abstract

As the knowledge base and importance of mitochondrial physiology to evolution, health and diseaseexpands, the necessity for harmonizing the terminologyconcerning mitochondrial respiratory states and rates has become increasingly apparent. Thechemiosmotic theoryestablishes the mechanism of energy transformationandcoupling in oxidative phosphorylation. Theunifying concept of the protonmotive force providestheframeworkfordeveloping a consistent theoretical foundation ofmitochondrial physiology and bioenergetics.We followthe latest SI guidelines and those of the International Union of Pure and Applied Chemistry(IUPAC)onterminology inphysical chemistry, extended by considerationsofopen systems and thermodynamicsof irreversible processes.Theconcept-driven constructive terminology incorporates the meaning of each quantity and alignsconcepts and symbols withthe nomenclature of classicalbioenergetics. We endeavour to provide a balanced view ofmitochondrial respiratory control and a critical discussion on reporting data of mitochondrial respiration in terms of metabolic flows and fluxes.Uniform standards for evaluation of respiratory states and rates will ultimatelycontribute BEC 2020.1 doi:10.26124/bec:2020-0001.v1www.bioenergetics-communications.org3of 44to reproducibility between laboratories and thussupport the development of datarepositoriesof mitochondrial respiratory function in species, tissues, and cells.Clarity of concept and consistency of nomenclature facilitate effective transdisciplinary communication, education, and ultimately further discovery.

Published
2020

18. Porin 1 Modulates Autophagy in Yeast

Author

Broeskamp, Filomena, primary, Edrich, Elizabeth S. M., additional, Knittelfelder, Oskar, additional, Neuhaus, Lisa, additional, Meyer, Thorsten, additional, Heyden, Jonas, additional, Habernig, Lukas, additional, Kreppel, Florian, additional, Gourlay, Campbell W., additional, and Rockenfeller, Patrick, additional

Published
2021
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21. Porin 1 Modulates Autophagy in Yeast

Author

Broeskamp, Filomena, Edrich, Elizabeth S. M., Knittelfelder, Oskar, Neuhaus, Lisa, Meyer, Thorsten, Heyden, Jonas, Habernig, Lukas, Kreppel, Florian, Gourlay, Campbell W., Rockenfeller, Patrick, Broeskamp, Filomena, Edrich, Elizabeth S. M., Knittelfelder, Oskar, Neuhaus, Lisa, Meyer, Thorsten, Heyden, Jonas, Habernig, Lukas, Kreppel, Florian, Gourlay, Campbell W., and Rockenfeller, Patrick

Abstract

Autophagy is a cellular recycling program which efficiently reduces the cellular burden of ageing. Autophagy is characterised by nucleation of isolation membranes, which grow in size and further expand to form autophagosomes, engulfing cellular material to be degraded by fusion with lysosomes (vacuole in yeast). Autophagosomal membranes do not bud from a single cell organelle, but are generated de novo. Several lipid sources for autophagosomal membranes have been identified, but the whole process of their generation is complex and not entirely understood. In this study, we investigated how the mitochondrial outer membrane protein porin 1 (Por1), the yeast orthologue of mammalian voltage-dependent anion channel (VDAC), affects autophagy in yeast. We show that POR1 deficiency reduces the autophagic capacity and leads to changes in vacuole and lipid homeostasis. We further investigated whether limited phosphatidylethanolamine (PE) availability in por1∆ was causative for reduced autophagy by overexpression of the PE-generating phosphatidylserine decarboxylase 1 (Psd1). Altogether, our results show that POR1 deficiency is associated with reduced autophagy, which can be circumvented by additional PSD1 overexpression. This suggests a role for Por1 in Psd1-mediated autophagy regulation.

Published
2021
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22. Actin Cytoskeleton Regulation by the Yeast NADPH Oxidase Yno1p Impacts Processes Controlled by MAPK Pathways

Author

Weber, Manuela, Basu, Sukanya, González, Beatriz, Greslehner, Gregor P., Singer, Stefanie, Haskova, Danusa, Hasek, Jiri, Breitenbach, Michael, Gourlay, Campbell W., Cullen, Paul J., Rinnerthaler, Mark, Weber, Manuela, Basu, Sukanya, González, Beatriz, Greslehner, Gregor P., Singer, Stefanie, Haskova, Danusa, Hasek, Jiri, Breitenbach, Michael, Gourlay, Campbell W., Cullen, Paul J., and Rinnerthaler, Mark

Abstract

Reactive oxygen species (ROS) that exceed the antioxidative capacity of the cell can be harmful and are termed oxidative stress. Increasing evidence suggests that ROS are not exclusively detrimental, but can fulfill important signaling functions. Recently, we have been able to demonstrate that a NADPH oxidase-like enzyme (termed Yno1p) exists in the single-celled organism Saccharomyces cerevisiae. This enzyme resides in the peripheral and perinuclear endoplasmic reticulum and functions in close proximity to the plasma membrane. Its product, hydrogen peroxide, which is also produced by the action of the superoxide dismutase, Sod1p, influences signaling of key regulatory proteins Ras2p and Yck1p/2p. In the present work, we demonstrate that Yno1p-derived H2O2 regulates outputs controlled by three MAP kinase pathways that can share components: the filamentous growth (filamentous growth MAPK (fMAPK)), pheromone response, and osmotic stress response (hyperosmolarity glycerol response, HOG) pathways. A key structural component and regulator in this process is the actin cytoskeleton. The nucleation and stabilization of actin are regulated by Yno1p. Cells lacking YNO1 showed reduced invasive growth, which could be reversed by stimulation of actin nucleation. Additionally, under osmotic stress, the vacuoles of a ∆yno1 strain show an enhanced fragmentation. During pheromone response induced by the addition of alpha-factor, Yno1p is responsible for a burst of ROS. Collectively, these results broaden the roles of ROS to encompass microbial differentiation responses and stress responses controlled by MAPK pathways

Published
2021

24. Passive UHF RFID Voice Prosthesis Mounted Sensor for Microbial Growth Detection

Author

Makarovaite, Viktorija, Hillier, Aaron, Holder, Simon J., Gourlay, Campbell W., Batchelor, John C., Makarovaite, Viktorija, Hillier, Aaron, Holder, Simon J., Gourlay, Campbell W., and Batchelor, John C.

Abstract

Capacitive loading due to human tissue can lead to low efficiency for implantable Passive Radio Frequency Identification (RFID) antennas. The presented passive UHF antenna sensor provides read distances above 0.5 meters (within a body phantom) by utilizing a convoluted half-wave dipole design. It is able to detect simulated early to mature Candida albicans biofilm growth when mounted upon a voice prosthesis (up to a 30 μm biofilm thickness). Depending on the propagation frequency of interest, as early 4-hour growth (5 to 10 μm biofilm thickness) equivalent could be detected and before any device failure could occur due to the colonization. This was accomplished by utilising thin layers of polyurethane to decouple the saliva from the presented UHF sensor (biofilm growth is known to increase layer hydrophobicity). This presented sensor has better functionality within the US UHF frequency band as it detects changes above 5 μm. If there is a need for implantation within additional tissues with variable dielectric properties, a shunt capacitance of 2.6 pF could allow the system functionality within the permittivity range of 21 to 58. Allowing for immediate medical intervention before medical prosthesis failure

Published
2020

25. Localization and Functional Characterization of the Alternative Oxidase in Naegleria

Author

Cantoni, Diego M., Osborne, Ashley, Taib, Najwa, Thompson, GS, Kazana, Eleanna, Edrich, Elizabeth, Brown, Ian R., Gribaldo, Simonetta, Gourlay, Campbell W., Tsaousis, Anastasios D., Cantoni, Diego M., Osborne, Ashley, Taib, Najwa, Thompson, GS, Kazana, Eleanna, Edrich, Elizabeth, Brown, Ian R., Gribaldo, Simonetta, Gourlay, Campbell W., and Tsaousis, Anastasios D.

Abstract

The Alternative oxidase (AOX) is a protein involved in maintaining the Krebs cycle in instances where the respiratory chain has been inhibited, while allowing for the maintenance of cell growth and necessary metabolic processes for survival. Among eukaryotes, alternative oxidases have disperse distribution and are found in plants, fungi and a few protists, including Naegleria ssp. Naegleria species are free-living unicellular amoeboflagellates, and include the pathogenic species of N. fowleri, the so-called brain eating amoeba. Using a multidisciplinary approach, we aimed to understand the evolution, localization and function of AOX and the role that plays in Naegleria’s biology. Our analyses suggest that the protein was present in last common ancestor of the genus and structure prediction showed that all functional residues are also present in Naegleria species. Using a combination of cellular and biochemical techniques, we also functionally characterize N. gruberi’s AOX in its mitochondria and we demonstrate that its inactivation affects its proliferation. Consequently, we discuss the benefits of the presence of this protein in Naegleria species, along with its potential pathogenicity role in N. fowleri. We predict that our findings will spearhead new explorations to understand the cell biology, metabolism and evolution of Naegleria and other free-living relatives.

Published
2020

26. Precision Antifungal Treatment Significantly Extends Voice Prosthesis Lifespan in Patients Following Total Laryngectomy

Author

Pentland, Daniel R, Stevens, Sarah, Williams, Leila, Baker, Mark, McCall, Carolyn, Makarovaite, Viktorija, Balfour, Alistair, Mühlschlegel, Fritz A., Gourlay, Campbell W., Pentland, Daniel R, Stevens, Sarah, Williams, Leila, Baker, Mark, McCall, Carolyn, Makarovaite, Viktorija, Balfour, Alistair, Mühlschlegel, Fritz A., and Gourlay, Campbell W.

Abstract

Indwelling silicone valves called voice prostheses (VPs) are the gold standard for speech rehabilitation in patients with laryngeal cancer following total laryngectomy. Reported VP lifespans amongst these patients are highly variable but when devices fail patients experience loss of voice and an increase risk of chest infection. Early failure of VP is a current clinical concern that is associated with regular hospital visits, reduced quality of life and associated medical cost. Poly-microbial biofilms comprised of both bacterial and fungal microorganisms readily colonize VPs and are linked to loss of device performance and its early failure in addition to providing a reservoir for potential infection. Our detailed analysis of poly-microbial biofilm composition on 159 early failing VPs from 48 total laryngectomy patients confirmed Candida albicans as the predominant fungal species and Staphylococcus aureus as the most common bacterial colonizer within our patient cohort. Using a combination of microbiological analysis, patient data and a high-throughput antifungal test assay mimicking in vivo conditions we established an evidence based precision antifungal treatment approach to VP management. Our approach has allowed us to implement a personalized VP management pathway, which increases device in situ lifespan by an average of 270%. Our study represents a significant step forward in both our understanding of the cause of VP failure and a new effective treatment pathway that offers tangible benefit to patients.

Published
2020

28. Slow Growth and Increased Spontaneous Mutation Frequency in Respiratory Deficientafo1- Yeast Suppressed by a Dominant Mutation inATP3

Author

Li, Jing, primary, Rinnerthaler, Mark, additional, Hartl, Johannes, additional, Weber, Manuela, additional, Karl, Thomas, additional, Breitenbach-Koller, Hannelore, additional, Mülleder, Michael, additional, Vowinckel, Jakob, additional, Marx, Hans, additional, Sauer, Michael, additional, Mattanovich, Diethard, additional, Ata, Özge, additional, De, Sonakshi, additional, Greslehner, Gregor P, additional, Geltinger, Florian, additional, Burhans, Bill, additional, Grant, Chris, additional, Doronina, Victoria, additional, Ralser, Meryem, additional, Streubel, Maria Karolin, additional, Grabner, Christian, additional, Jarolim, Stefanie, additional, Moßhammer, Claudia, additional, Gourlay, Campbell W, additional, Hasek, Jiri, additional, Cullen, Paul J, additional, Liti, Gianni, additional, Ralser, Markus, additional, and Breitenbach, Michael, additional

Published
2020
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33. Proteomic analysis of dietary restriction in yeast reveals a role for Hsp26 in replicative lifespan extension.

Author

Campion, Richard, Bloxam, Leanne, Burrow, Kimberley, Brownridge, Philip J., Pentland, Daniel R., Thomas, Patricia, Gourlay, Campbell W., Eyers, Claire E., Barclay, Jeff W., and Morgan, Alan

Subjects
LIQUID chromatography-mass spectrometry, CAENORHABDITIS, HEAT shock proteins, PROTEOMICS, YEAST, MITOCHONDRIAL proteins, OXYGEN consumption
Abstract

Dietary restriction (DR) has been shown to increase lifespan in organisms ranging from yeast to mammals. This suggests that the underlying mechanisms may be evolutionarily conserved. Indeed, upstream signalling pathways, such as TOR, are strongly linked to DR-induced longevity in various organisms. However, the downstream effector proteins that ultimately mediate lifespan extension are less clear. To shed light on this, we used a proteomic approach on budding yeast. Our reasoning was that analysis of proteomewide changes in response to DR might enable the identification of proteins that mediate its physiological effects, including replicative lifespan extension. Of over 2500 proteins we identified by liquid chromatography-mass spectrometry, 183 were significantly altered in expression by at least 3-fold in response to DR. Most of these proteins were mitochondrial and/or had clear links to respiration and metabolism. Indeed, direct analysis of oxygen consumption confirmed that mitochondrial respiration was increased several-fold in response to DR. In addition, several key proteins involved in mating, including Ste2 and Ste6, were down-regulated by DR. Consistent with this, shmoo formation in response to a-factor pheromone was reduced by DR, thus confirming the inhibitory effect of DR on yeast mating. Finally, we found that Hsp26, a member of the conserved small heat shock protein (sHSP) family, was up-regulated by DR and that overexpression of Hsp26 extended yeast replicative lifespan. As overexpression of sHSPs in Caenorhabditis elegans and Drosophila has previously been shown to extend lifespan, our data on yeast Hsp26 suggest that sHSPs may be universally conserved effectors of longevity. [ABSTRACT FROM AUTHOR]

Published
2021
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34. Mitochondrial respiratory states and rates

Author

Gnaiger, Erich, Aasander Frostner, Eleonor, Abdul Karim, Norwahidah, Abumrad, Nada A, Acuna-Castroviejo, Dario, Adiele, Reginald C, Ahn, Bumsoo, Ali, Sameh S, Alton, Lesley, Alves, Marco G, Amati, Francesca, Amoedo, Nivea Dias, Andreadou, Ioanna, Arago, Marc, Aral, Cenk, Arandarcikaite, Odeta, Armand, Anne-Sophie, Arnould, Thierry, Avram, Vlad Florian, Bailey, Damian M, Bajpeyi, Sudip, Bajzikova, Martina, Bakker, Barbara M, Barlow, Jonathan, Bastos Sant'Anna Silva, Ana Carolina, Batterson, Philip, Battino, Maurizio, Bazil, Jason, Beard, Daniel A, Bednarczyk, Piotr, Bello, Fiona, Ben-Shachar, Dorit, Bergdahl, Andreas, Berge, Rolf K, Bergmeister, Lisa, Bernardi, Paolo, Berridge, Michael V, Bettinazzi, Stefano, Bishop, David, Blier, Pierre U, Blindheim, Dan Filip, Boardman, Neoma T, Boetker, Hans Erik, Borchard, Sabine, Boros, Mihaly, Borsheim, Elisabet, Borutaite, Vilma, Botella, Javier, Bouillaud, Frederic, Bouitbir, Jamal, Boushel, Robert C, Bovard, Josh, Breton, Sophie, Brown, David A, Brown, Guy C, Brown, Robert A, Brozinick, Joseph T, Buettner, Garry R, Burtscher, Johannes, Calabria, Elisa, Calbet, Jose A, Calzia, Enrico, Cannon, Daniel T, Cano Sanchez, Maria, Canto Alvarez, Carlos, Cardoso, Luiza Helena Daltro, Carvalho, Eugenia, Casado Pinna, Marta, Cassar, Samantha, Cassina, Adriana M, Castelo, Maria P, Gonzalez-Franquesa, A, Cavalcanti-de-Albuquerque, Joao Paulo, Cervinkova, Zuzana, Chabi, Beatrice, Chakrabarti, Lisa, Chakrabarti, Sasanka, Chaurasia, Bhagirath, Chen, Qi, Chicco, Adam J, Chinopoulos, Christos, Chowdhury, Subir K, Cizmarova, Beata, Clementi, Emilio, Coen, Paul M, Cohen, Bruce H, Coker, Robert H, Collin, Anne, Crisostomo, Luis, Dahdah, Norma, Dalgaard, Louise T, Dambrova, Maija, Danhelovska, Tereza, Darveau, Charles A, Das, Anibh M, Dash, Ranjan K, Davidova, Eliska, Davis, Michael S, De Goede, Paul, De Palma, Clara, Dembinska-Kiec, Aldona, Detraux, Damien, Devaux, Yvan, Di Marcello, Marco, Dias, Tania R, Distefano, Giovanna, Doermann, Niklas, Doerrier, Carolina, Dong, Lan-Feng, Donnelly, Chris, Drahota, Zdenek, Duarte, Filipe Valente, Dubouchaud, Herve, Duchen, Michael R, Dumas, Jean-Francois, Durham, William J, Dymkowska, Dorota, Dyrstad, Sissel E, Dyson, Alex, Dzialowski, Edward M, Eaton, Simon, Ehinger, Johannes, Elmer, Eskil, Endlicher, Rene, Engin, Ayse B, Escames, Germaine, Ezrova, Zuzana, Falk, Marni Joy, Fell, David A, Ferdinandy, Peter, Ferko, Miroslav, Ferreira, Julio Cesar Batista, Ferreira, Rita, Ferri, Alessandra, Fessel, Joshua P, Filipovska, Aleksandra, Fisar, Zdenek, Fischer, Christine, Fischer, Michael, Fisher, Gordon, Fisher, Joshua J, Ford, Ellen, Fornaro, Mara, Galina, Antonio, Galkin, Alexander, Gallee, Leon, Galli, Gina L, Gama Perez, Pau, Gan, Zhenji, Ganetzky, Rebecca, Garcia-Rivas, Gerardo, Garcia-Roves, Pablo Miguel, Garcia-Souza, Luiz Felipe, Garipi, Enis, Garlid, Keith D, Garrabou, Gloria, Garten, Antje, Gastaldelli, Amalia, Gayen, Jiaur, Genders, Amanda J, Genova, Maria Luisa, Giovarelli, Matteo, Goncalo Teixeira da Silva, Rui, Goncalves, Debora Farina, Gonzalez-Armenta, Jenny L, Gonzalez-Freire, Marta, Gonzalo, Hugo, Goodpaster, Bret H, Gorr, Thomas A, Gourlay, Campbell W, Granata, Cesare, Grefte, Sander, Guarch, Meritxell Espino, Gueguen, Naig, Gumeni, Sentiljana, Haas, Clarissa B, Haavik, Jan, Haendeler, Judith, Haider, Markus, Hamann, Andrea, Han, Jin, Han, Woo Hyun, Hancock, Chad R, Hand, Steven C, Handl, Jiri, Hargreaves, Ian P, Harper, Mary Ellen, Harrison, David K, Hassan, Hazirah, Hausenloy, Derek J, Heales, Simon JR, Heiestad, Christina, Hellgren, Kim T, Hepple, Russell T, Hernansanz-Agustin, Pablo, Hewakapuge, Sudinna, Hickey, Anthony J, Ho, Dieu Hien, Hoehn, Kyle L, Hoel, Frederik, Holland, Olivia J, Holloway, Graham P, Hoppel, Charles L, Hoppel, Florian, Houstek, Josef, Huete-Ortega, Maria, Hyrossova, Petra, Iglesias-Gonzalez, Javier, Irving, Brian A, Isola, Raffaella, Iyer, Shilpa, Jackson, Christophe B, Jadiya, Pooja, Jana, Prado Fabian, Jang, David H, Jang, Young C, Janowska, Joanna, Jansen, Kirsten, Jansen-Duerr, Pidder, Jansone, Baiba, Jarmuszkiewicz, Wieslawa, Jaskiewicz, Anna, Jedlicka, Jan, Jespersen, Nichlas R, Jha, Rajan K, Jurczak, Michael J, Jurk, Diana, Kaambre, Tuuli, Kaczor, Jan J, Kainulainen, Heikki, Kampa, Rafal Pawel, Kandel, Sunil M, Kane, Daniel A, Kapferer, Werner, Kappler, Lisa, Karabatsiakis, Alexander, Karkucinska-Wieckowska, Agnieszka, Kaur, Sarbjot, Keijer, Jaap, Keller, Markus A, Keppner, Gloria, Khamoui, Andy V, Kidere, Dita, Kilbaugh, Todd, Kim, Hyoung Kyu, Kim, Julian KS, Klepinin, Aleksandr, Klepinina, Lyudmila, Klingenspor, Martin, Klocker, Helmut, Komlódi, Timea, Koopman, Werner JH, Kopitar-Jerala, Natasa, Kowaltowski, Alicia J, Kozlov, Andrey V, Krajcova, Adela, Krako Jakovljevic, Nina, Kristal, Bruce S, Krycer, Jamer R, Kuang, Jujiao, Kucera, Otto, Kuka, Janis, Kwak, Hyo Bum, Kwast, Kurt, Laasmaa, Martin, Labieniec-Watala, Magdalena, Lai, Nicola, Land, John M, Lane, Nick, Laner, Verena, Lanza, Ian R, Larsen, Terje S, Lavery, Gareth G, Lazou, Antigone, Lee, Hong Kyu, Leeuwenburgh, Christiaan, Lehti, Maarit, Lemieux, Helene, Lenaz, Giorgio, Lerfall, Jorgen, Li, Pingan A, Li Puma, Lance, Liepins, Edgars, Lionett, Sofie, Liu, Jiankang, Lopez, Luis C, Lucchinetti, Eliana, Ma, Tao, Macedo, Maria P, Maciej, Sarah, MacMillan-Crow, Lee Ann, Majtnerova, Pavlina, Makarova, Elina, Makrecka-Kuka, Marina, Malik, Afshan N, Markova, Michaela, Martin, Daniel S, Martins, Ana Dias, Martins, Joao D, Maseko, Tumisang Edward, Maull, Felicia, Mazat, Jean Pierre, McKenna, Helen T, McKenzie, Matthew, Menze, Michael A, Merz, Tamara, Meszaros, Andras T, Methner, Axel, Michalak, Slawomir, Moellering, Douglas R, Moisoi, Nicoleta, Molina, Anthony JA, Montaigne, David, Moore, Anthony L, Moreau, Kerrie, Moreira, Bruno P, Moreno-Sanchez, Rafael, Mracek, Tomas, Muccini, Anna Maria, Muntane, Jordi, Muntean, Danina M, Murray, Andrew J, Musiol, Eva, Nabben, Miranda, Nair, K Sreekumaran, Nehlin, Jan O, Nemec, Michal, Neufer, P Darrell, Neuzil, Jiri, Neviere, Remi, Newsom, Sean A., Nozickova, Katerina, O'Brien, Katie A, O'Gorman, Donal, Olgar, Yusuf, Oliveira, Ben, Oliveira, Marcus F, Oliveira, Marcos Tulio, Oliveira, Pedro F, Oliveira, Paulo J, Orynbayeva, Zulfiya, Osiewacz, Heinz D, Pak, Youngmi K, Pallotta, Maria L, Palmeira, Carlos M, Parajuli, Nirmala, Passos, Joao F, Passrugger, Manuela, Patel, Hemal H, Pavlova, Nadia, Pecina, Petr, Pedersen, Tina M, Pereira da Silva Grilo da Silva, Filomena, Perez Valencia, Juan A, Perks, Kara L, Pesta, Dominik, Petit, Patrice X, Pettersen, Ina Katrine Nitschke, Pichaud, Nicolas, Pichler, Irene, Piel, Sarah, Pietka, Terri A, Pino, Maria F, Pirkmajer, Sergej, Plangger, Mario, Porter, Craig, Porter, Richard K, Procaccio, Vincent, Prochownik, Edward V, Prola, Alexandre, Pulinilkunnil, Thomas, Puskarich, Michael A, Puurand, Marju, Radenkovic, Filip, Ramzan, Rabia, Rattan, Suresh IS, Reboredo, Patricia, Renner-Sattler, Kathrin, Rial, Eduardo, Robinson, Matthew M, Roden, Michael, Rodriguez, Enrique, Rodriguez-Enriquez, Sara, Roesland, Gro Vatne, Rohlena, Jakub, Rolo, Anabela Pinto, Ropelle, Eduardo R, Rossignol, Rodrigue, Rossiter, Harry B, Rubelj, Ivica, Rybacka-Mossakowska, Joanna, Saada, Ann, Safaei, Zahra, Sarlak, S, Salin, Karine, Salvadego, Desy, Sandi, Carmen, Saner, Nicholas, Sanz, Alberto, Sazanov, Leonid A, Scatena, Roberto, Schartner, Melanie, Scheibye-Knudsen, Morten, Schilling, Jan M, Schlattner, Uwe, Schoenfeld, Peter, Schots, Pauke C, Schulz, Rainer, Schwarzer, Christoph, Scott, Graham R, Selman, Colin, Shabalina, Irina G, Sharma, Pushpa, Sharma, Vipin, Shevchuk, Igor, Shirazi, Reza, Shiroma, Jonathan G, Siewiera, Karolina, Silber, Ariel M, Silva, Ana Maria, Sims, Carrie A, Singer, Dominique, Singh, Brijesh Kumar, Skolik, Robert A, Smenes, Benedikte Therese, Smith, James, Soares, Félix Alexandre Antunes, Sobotka, Ondrej, Sokolova, Inna, Sonkar, Vijay K, Sowton, Alice P, Sparagna, Genevieve C, Sparks, Lauren M, Spinazzi, Marco, Stankova, Pavla, Starr, Jonathan, Stary, Creed, Stelfa, Gundega, Stepto, Nigel K, Stiban, Johnny, Stier, Antoine, Stocker, Roland, Storder, Julie, Sumbalova, Zuzana, Suomalainen, Wartiovaara Anu, Suravajhala, Prashanth, Svalbe, Baiba, Swerdlow, Russel H, Swiniuch, Daria, Szabo, Ildiko, Szewczyk, Adam, Szibor, Marten, Tanaka, Masashi, Tandler, Bernard, Tarnopolsky, Mark A, Tausan, Daniel, Tavernarakis, Nektarios, Tepp, Kersti, Thakkar, Himani, Thapa, Maheshwo, Thyfault, John P, Tomar, Dhanendra, Ton, Riccardo, Torp, May-Kristin, Towheed, Atif, Tretter, Laszlo, Trewin, Adam J, Trifunovic, Aleksandra, Trivigno, Catherine, Tronstad, Karl Johan, Trougakos, Ioannis P, Truu, Laura, Tuncay, Erkan, Turan, Belma, Tyrrell, Daniel J, Urban, Tomas, Valentine, Joseph Marco, Van Bergen, Nicole J, Van Hove, Johan, Varricchio, Frederick, Vella, Joanna, Vendelin, Marko, Vercesi, Anibal E, Victor, Victor Manuel, Vieira Ligo Teixeira, Camila, Vidimce, Josif, Viel, Christian, Vieyra, Adalberto, Vilks, Karlis, Villena, Joseph A, Vincent, Vinnyfred, Vinogradov, Andrey D, Viscomi, Carlo, Vitorino, Rui Miguel Pinheiro, Vogt, Sebastian, Volani, Chiara, Volska, Kristine, Votion, Dominique-Marie, Vujacic-Mirski, Ksenija, Wagner, Brett A, Ward, Marie Louise, Warnsmann, Verena, Wasserman, David H, Watala, Cezary, Wei, Yau-Huei, Whitfield, Jamie, Wickert, Anika, Wieckowski, Mariusz R, Wiesner, Rudolf J, Williams, Caroline M, Winwood-Smith, Hugh, Wohlgemuth, Stephanie E, Wohlwend, Martin, Wolff, Jonci Nikolai, Wrutniak-Cabello, Chantal, Wuest, Rob C I, Yokota, Takashi, Zablocki, Krzysztof, Zanon, Alessandra, Zanou, Nadege, Zaugg, Kathrin, Zaugg, Michael, Zdrazilova, Lucie, Zhang, Yong, Zhang, Yi Zhu, Zikova, Alena, Zischka, Hans, Zorzano, Antonio, Zvejniece, Liga, Lagarrigue, Sylviane, Munro, Daniel, Pereira, Susana, Laranjinha, Joäo, Almeida, Angeles, Diederich, M, Hecker, M, Jusic, A, Prigione, A, Sommer, N, Weissig, V, Abdel-Rahman, EA, Sova, M, Amorim, R, Beleza, J, Bravo-Sagua, R, Celen, MC, Coxito, P, Crispim, M, Dias, C, Evinova, A, Fuertes Agudo, M, Gao, Y, Garcia, G, Goikoetxea Usandizaga, N, Grilo, L, Minuzzi, LM, Hachmo, Y, Hajrulahovic, A, Hatokova, Z, Henrique, A, Holzner, L, Kimoloi, S, Ledo, AM, Machado, IF, Magalhaes, J, Magri, A, Nunes, S, Oliveira, J, Pinho, SA, Preguica, I, Reano, S, Rodrigues, AS, Santos, D, Sardao, V, Stevanovic, J, Teodoro, J, Van der Ende, M, Zujovic, T, Djafarzadeh, S, Schneider Gasser, EM, Jaspers, RT, Arias-Reyes, C, Bairam, A, Laouafa, S, Marcouiller, F, Soliz, J, Glatz, J, Antunes, D, Bach de Courtade, SM, Bardal, T, Di Paola, FJ, Fulton, M, Grams, B, Joseph, V, Kwon, OS, Liang, L, Mila Guasch, M, Moore, C, Norman, J, O'Brien, K, Olsen, RE, Paez, H, Rees, BB, Roshanravan, B, Scaife, P, Sendon, PM, Vlachaki Walker, J, Crossland, H, Jones, JG, Bento, G, Perales, JC, and Aragones Lopez, J

Subjects
uncoupling, Mitochondrial respiratory control, coupling control, protonmotive force, oxidative phosphorylation, mitochondrial respiratory control, NARILIS, ET [electron transfer], electron transfer, residual oxygen consumption, flux, normalization, efficiency, flow, oxygen, mitochondrial preparations, proton leak
Abstract

As the knowledge base and importance of mitochondrial physiology to human health expands, the necessity for harmonizing the terminology concerning mitochondrial respiratory states and rates has become increasingly apparent. The chemiosmotic theory establishes the mechanism of energy transformation and coupling in oxidative phosphorylation. The unifying concept of the protonmotive force provides the framework for developing a consistent theoretical foundation of mitochondrial physiology and bioenergetics. We follow guidelines of the International Union of Pure and Applied Chemistry (IUPAC) on terminology in physical chemistry, extended by considerations of open systems and thermodynamics of irreversible processes. The concept-driven constructive terminology incorporates the meaning of each quantity and aligns concepts and symbols with the nomenclature of classical bioenergetics. We endeavour to provide a balanced view of mitochondrial respiratory control and a critical discussion on reporting data of mitochondrial respiration in terms of metabolic flows and fluxes. Uniform standards for evaluation of respiratory states and rates will ultimately contribute to reproducibility between laboratories and thus support the development of databases of mitochondrial respiratory function in species, tissues, and cells. Clarity of concept and consistency of nomenclature facilitate effective transdisciplinary communication, education, and ultimately further discovery.

Published
2019
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36. An analysis of respiratory function and mitochondrial morphology in Candida albicans

Author

Duvenage, Lucian, Daniel, Pentland R., Munro, Carol, Gourlay, Campbell W., Duvenage, Lucian, Daniel, Pentland R., Munro, Carol, and Gourlay, Campbell W.

Abstract

Respiratory function and mitochondrial dynamics have been well characterised in a number of cell types, including the model yeast Saccharomyces cerevisiae, but remain under-researched in fungal pathogens such as Candida albicans. An understanding of mitochondrial activity and morphology is important if we are to understand the role that this organelle plays in adaption and response to stress. Here we examine the respiratory profiles of several prominent pathogenic Candida species and present a useful GFP probe for the study of mitochondrial morphology. We examine mitochondrial morphology under a variety of conditions that Candida species may encounter within the host, such as acidic pH, respiratory and oxidative stress. The GFP probe also allowed for the visualisation of mitochondria during hyphal development, during growth following macrophage engulfment and distribution within biofilms. These data demonstrate that the mitochondrial network of C. albicans is highly responsive to both environmental conditions and developmental cues, suggesting important roles for this organelle in environmental adaption.

Published
2019

37. Inhibition of classical and alternative modes of respiration in Candida albicans leads to cell wall remodelling and increased macrophage recognition

Author

Duvenage, Lucian, Walker, Louise A., Bojarczuk, Aleksandra, Johnston, Simon A., Maccallum, Donna M., Munro, Carol, Gourlay, Campbell W., Duvenage, Lucian, Walker, Louise A., Bojarczuk, Aleksandra, Johnston, Simon A., Maccallum, Donna M., Munro, Carol, and Gourlay, Campbell W.

Abstract

The human fungal pathogen Candida albicans requires respiratory function for normal growth, morphogenesis and virulence. Mitochondria therefore represent an enticing target for the development of new antifungal strategies. This possibility is bolstered by the presence of characteristics specific to fungi. However, respiration in C. albicans, as in many fungal organisms, is facilitated by redundant electron transport mechanisms, making direct inhibition a challenge. In addition, many chemicals known to target the electron transport chain are highly toxic. Here we make use of chemicals with low toxicity to efficiently inhibit respiration in C. albicans. We find that use of the Nitric Oxide donor, Sodium Nitroprusside (SNP), and the alternative oxidase inhibitor, SHAM, prevents respiration, leads to a loss of viability and to cell wall rearrangements that increase the rate of uptake by macrophages in vitro and in vivo. We propose that SNP+SHAM treatment leads to transcriptional changes that drive cell wall re-arrangement but which also prime cells to activate transition to hyphal growth. In line with this we find that pre-treatment of C. albicans with SNP+SHAM leads to an increase in virulence. Our data reveals strong links between respiration, cell wall remodelling and activation of virulence factors. Our findings demonstrate that respiration in C. albicans can be efficiently inhibited with chemicals, which are not damaging to the mammalian host, but that we need to develop a deeper understanding of the roles of mitochondria in cellular signalling if they are to be developed successfully as a target for new antifungals.

Published
2019

38. A Passive UHF RFID Dielectric Sensor for Aqueous Electrolytes

Author

Hillier, Aaron, Makarovaite, Viktorija, Gourlay, Campbell W., Holder, Simon J., Batchelor, John C., Hillier, Aaron, Makarovaite, Viktorija, Gourlay, Campbell W., Holder, Simon J., and Batchelor, John C.

Abstract

The one step modification of a commercial RFID sensing tag is demonstrated using polydimethylsiloxane based thin film chemistry to construct reusable passive RFID sensors for changes in the dielectric properties of electrolyte solutions as a function of concentration. The effects of PDMS film thickness were characterized as a function of RFID sensor code value. The output sensor code of the RFMicron RFM2100-AER wireless flexible moisture sensor (taken between 800-860 MHz) was compared to readings taken when the tag was dry and when the tag had a water deposition on the sensor area. The effect of the direct application of liquid water to the tag was to alter the capacitance presented to the integrated chip which auto-tunes to correct for the reactance. By varying the thickness of the PDMS film between the interdigitated sensor and deposited liquid, the sensitivity of the tag to a high dielectric medium could be controlled. Aqueous salt solutions were tested on a 500 m thickness film. It was found that the sensing platform could be used as a means of measuring the concentration of various salt solutions within the range 0-2M, and in turn could be used as a passive UHF RFID dielectric measuring tool. The measurement capability of the platform was subsequently demonstrated using a reduced frequency range (845-865 MHz).

Published
2019

39. High Resolution Respirometry in Candida albicans

Author

Duvenage, Lucian, Munro, Carol, Gourlay, Campbell W., Duvenage, Lucian, Munro, Carol, and Gourlay, Campbell W.

Abstract

Many Candida species, such as the opportunistic human pathogen Candida albicans, are Crabtree-Negative yeasts and are therefore highly dependent on the energy generated through oxidative phosphorylation. Respiration control is linked to a range of aspects of C. albicans cell physiology that appear to be important for virulence, most notably its ability to switch from yeast to hyphal forms and the maintenance of the cell wall. The following protocol allows for the measurement and characterisation of respiration in C. albicans using high resolution respirometry. We outline how addition of respiration inhibitors can be used to assay the “mode” of respiration, mitochondrial health and the level of electron transport that is coupled to ATP synthase activity in living cell cultures. These data provide useful insight into the effects of external factors, such as exposure to anti-fungal compounds, or internal changes such as genetic alterations on respiratory performance.

Published
2019

40. Passive Wireless UHF RFID Antenna Label for Sensing Dielectric Properties of Aqueous and Organic Liquids

Author

Makarovaite, Viktorija, Hillier, A.J.R., Holder, Simon J., Gourlay, Campbell W., Batchelor, John C., Makarovaite, Viktorija, Hillier, A.J.R., Holder, Simon J., Gourlay, Campbell W., and Batchelor, John C.

Abstract

The in situ wireless sensing of dielectric properties for organic aqueous solutions with a wide range of relative permittivities is presented. The use of a UHF passive label antenna design attached to either clear borosilicate glass bottle or petri plate is proposed and which allows for the unobtrusive, safe monitoring of the liquid solutions. The meandered dipole antenna (with a parasitic loop matching component) frequency is highly reliant on the chosen container as well as on the liquid present within, and adjusts with shifting dielectric properties. Tested solutions of high relative permittivity (such as water) along with low permittivity, lossy liquids (such as xylene) presented distinctive frequency characteristics with read distances of up to 7 meters for each type of container tested. The sensor was also able to detect ‘unknown’ solutions and determine the dielectric properties by utilizing standard curve analysis with an accuracy of ± 0.834 relative permittivity and ± 0.050 S·m-1 conductivity (compared to a standard dielectric measurement system available on the market). With the accuracy known, tuning the design to fit any necessary frequency is possible as a means to detect specific changes in any one liquid system. This sensor is a possible candidate for discreet real-time monitoring of liquid storage containers and an alternative for low-cost bulk liquid dielectric property identification which could be implemented in areas requiring, constant, or remote monitoring as needed.

Published
2019

46. cAMP/PKA signaling balances respiratory activity with mitochondria dependent apoptosis via transcriptional regulation

Author

Gourlay Campbell W and Leadsham Jane E

Subjects
Cytology, QH573-671
Abstract

Abstract Background Appropriate control of mitochondrial function, morphology and biogenesis are crucial determinants of the general health of eukaryotic cells. It is therefore imperative that we understand the mechanisms that co-ordinate mitochondrial function with environmental signaling systems. The regulation of yeast mitochondrial function in response to nutritional change can be modulated by PKA activity. Unregulated PKA activity can lead to the production of mitochondria that are prone to the production of ROS, and an apoptotic form of cell death. Results We present evidence that mitochondria are sensitive to the level of cAMP/PKA signaling and can respond by modulating levels of respiratory activity or committing to self execution. The inappropriate activation of one of the yeast PKA catalytic subunits, Tpk3p, is sufficient to commit cells to an apoptotic death through transcriptional changes that promote the production of dysfunctional, ROS producing mitochondria. Our data implies that cAMP/PKA regulation of mitochondrial function that promotes apoptosis engages the function of multiple transcription factors, including HAP4, SOK2 and SCO1. Conclusions We propose that in yeast, as is the case in mammalian cells, mitochondrial function and biogenesis are controlled in response to environmental change by the concerted regulation of multiple transcription factors. The visualization of cAMP/TPK3 induced cell death within yeast colonies supports a model that PKA regulation plays a physiological role in coordinating respiratory function and cell death with nutritional status in budding yeast.

Published
2010
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47. Guidelines and recommendations on yeast cell death nomenclature

Author

Carmona-Gutierrez, Didac, Bauer, Maria Anna, Zimmermann, Andreas, Aguilera, Andres, Austriaco, Nicanor, Ayscough, Kathryn, Balzan, Rena, Bar-Nun, Shoshana, Barrientos, Antonio, Belenky, Peter, Blondel, Marc, Braun, Ralf J., Breitenbach, Michael, Burhans, William C., Büttner, Sabrina, Cavalieri, Duccio, Chang, Michael, Cooper, Katrina F., Corte-Real, Manuela, Costa, Vitor, Cullin, Christophe, Dawes, Ian, Dengjel, Jorn, Dickman, Martin B., Eisenberg, Tobias, Fahrenkrog, Birthe, Fasel, Nicolas, Frohlich, Kai-Uwe, Gargouri, Ali, Giannattasio, Sergio, Goffrini, Paola, Gourlay, Campbell W., Grant, Chris M., Greenwood, Michael T., Guaragnella, Nicoletta, Heger, Thomas, Heinisch, Juergen, Herker, Eva, Herrmann, Johannes M., Hofer, Sebastian, Jimenez-Ruiz, Antonio, Jungwirth, Helmut, Kainz, Katharina, Kontoyiannis, Dimitrios P., Ludovico, Paula, Manon, Stephen, Martegani, Enzo, Mazzoni, Cristina, Megeney, Lynn A., Meisinger, Chris, Nielsen, Jens, Nystrom, Thomas, Osiewacz, Heinz D., Outeiro, Tiago F., Park, Hay-Oak, Pendl, Tobias, Petranovic, Dina, Picot, Stephane, Polcic, Peter, Powers, Ted, Ramsdale, Mark, Rinnerthaler, Mark, Rockenfeller, Patrick, Ruckenstuhl, Christoph, Schaffrath, Raffael, Segovia, Maria, Severin, Fedor F., Sharon, Amir, Sigrist, Stephan J., Sommer-Ruck, Cornelia, Sousa, Maria Joao, Thevelein, Johan M., Thevissen, Karin, Titorenko, Vladimir, Toledano, Michel B., Tuite, Mick, Voegtle, F. -Nora, Westermann, Benedikt, Winderickx, Joris, Wissing, Silke, Woelfl, Stefan, Zhang, Zhaojie J., Zhao, Richard Y., Zhou, Bing, Galluzzi, Lorenzo, Kroemer, Guido, Madeo, Frank, Carmona-Gutierrez, Didac, Bauer, Maria Anna, Zimmermann, Andreas, Aguilera, Andres, Austriaco, Nicanor, Ayscough, Kathryn, Balzan, Rena, Bar-Nun, Shoshana, Barrientos, Antonio, Belenky, Peter, Blondel, Marc, Braun, Ralf J., Breitenbach, Michael, Burhans, William C., Büttner, Sabrina, Cavalieri, Duccio, Chang, Michael, Cooper, Katrina F., Corte-Real, Manuela, Costa, Vitor, Cullin, Christophe, Dawes, Ian, Dengjel, Jorn, Dickman, Martin B., Eisenberg, Tobias, Fahrenkrog, Birthe, Fasel, Nicolas, Frohlich, Kai-Uwe, Gargouri, Ali, Giannattasio, Sergio, Goffrini, Paola, Gourlay, Campbell W., Grant, Chris M., Greenwood, Michael T., Guaragnella, Nicoletta, Heger, Thomas, Heinisch, Juergen, Herker, Eva, Herrmann, Johannes M., Hofer, Sebastian, Jimenez-Ruiz, Antonio, Jungwirth, Helmut, Kainz, Katharina, Kontoyiannis, Dimitrios P., Ludovico, Paula, Manon, Stephen, Martegani, Enzo, Mazzoni, Cristina, Megeney, Lynn A., Meisinger, Chris, Nielsen, Jens, Nystrom, Thomas, Osiewacz, Heinz D., Outeiro, Tiago F., Park, Hay-Oak, Pendl, Tobias, Petranovic, Dina, Picot, Stephane, Polcic, Peter, Powers, Ted, Ramsdale, Mark, Rinnerthaler, Mark, Rockenfeller, Patrick, Ruckenstuhl, Christoph, Schaffrath, Raffael, Segovia, Maria, Severin, Fedor F., Sharon, Amir, Sigrist, Stephan J., Sommer-Ruck, Cornelia, Sousa, Maria Joao, Thevelein, Johan M., Thevissen, Karin, Titorenko, Vladimir, Toledano, Michel B., Tuite, Mick, Voegtle, F. -Nora, Westermann, Benedikt, Winderickx, Joris, Wissing, Silke, Woelfl, Stefan, Zhang, Zhaojie J., Zhao, Richard Y., Zhou, Bing, Galluzzi, Lorenzo, Kroemer, Guido, and Madeo, Frank

Abstract

Elucidating the biology of yeast in its full complexity has major implications for science, medicine and industry. One of the most critical processes determining yeast life and physiology is cellular demise. However, the investigation of yeast cell death is a relatively young field, and a widely accepted set of concepts and terms is still missing. Here, we propose unified criteria for the definition of accidental, regulated, and programmed forms of cell death in yeast based on a series of morphological and biochemical criteria. Specifically, we provide consensus guidelines on the differential definition of terms including apoptosis, regulated necrosis, and autophagic cell death, as we refer to additional cell death routines that are relevant for the biology of (at least some species of) yeast. As this area of investigation advances rapidly, changes and extensions to this set of recommendations will be implemented in the years to come. Nonetheless, we strongly encourage the authors, reviewers and editors of scientific articles to adopt these collective standards in order to establish an accurate framework for yeast cell death research and, ultimately, to accelerate the progress of this vibrant field of research.

Published
2018
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48. Guidelines and recommendations on yeast cell death nomenclature

Author

Carmona-Gutierrez, D, Bauer, M, Zimmermann, A, Aguilera, A, Austriaco, N, Ayscough, K, Balzan, R, Bar-Nun, S, Barrientos, A, Belenky, P, Blondel, M, Braun, R, Breitenbach, M, Burhans, W, Buettner, S, Cavalieri, D, Chang, M, Cooper, K, Côrte-Real, M, Costa, V, Cullin, C, Dawes, I, Dengjel, J, Dickman, M, Eisenberg, T, Fahrenkrog, B, Fasel, N, Froehlich, K, Gargouri, A, Giannattasio, S, Goffrini, P, Gourlay, C, Grant, C, Greenwood, M, Guaragnella, N, Heger, T, Heinisch, J, Herker, E, Herrmann, J, Hofer, S, Jiménez-Ruiz, A, Jungwirth, H, Kainz, K, Kontoyiannis, D, Ludovico, P, Manon, S, Martegani, E, Mazzoni, C, Megeney, L, Meisinger, C, Nielsen, J, Nystroem, T, Osiewacz, H, Outeiro, T, Park, H, Pendl, T, Petranovic, D, Picot, S, Polčic, P, Powers, T, Ramsdale, M, Rinnerthaler, M, Rockenfeller, P, Ruckenstuhl, C, Schaffrath, R, Segovia, M, Severin, F, Sharon, A, Sigrist, S, Sommer-Ruck, C, Sousa, M, Thevelein, J, Thevissen, K, Titorenko, V, Toledano, M, Tuite, M, Voegtle, F, Westermann, B, Winderickx, J, Wissing, S, Woelfl, S, Zhang, Z, Zhao, R, Zhou, B, Galluzzi, L, Kroemer, G, Madeo, F, Carmona-Gutierrez, Didac, Bauer, Maria Anna, Zimmermann, Andreas, Aguilera, Andrés, Austriaco, Nicanor, Ayscough, Kathryn, Balzan, Rena, Bar-Nun, Shoshana, Barrientos, Antonio, Belenky, Peter, Blondel, Marc, Braun, Ralf J., Breitenbach, Michael, Burhans, William C., Buettner, Sabrina, Cavalieri, Duccio, Chang, Michael, Cooper, Katrina F., Côrte-Real, Manuela, Costa, Vítor, Cullin, Christophe, Dawes, Ian, Dengjel, Jörn, Dickman, Martin B., Eisenberg, Tobias, Fahrenkrog, Birthe, Fasel, Nicolas, Froehlich, Kai-Uwe, Gargouri, Ali, Giannattasio, Sergio, Goffrini, Paola, Gourlay, Campbell W., Grant, Chris M., Greenwood, Michael T., Guaragnella, Nicoletta, Heger, Thomas, Heinisch, Juergen, Herker, Eva, Herrmann, Johannes M., Hofer, Sebastian, Jiménez-Ruiz, Antonio, Jungwirth, Helmut, Kainz, Katharina, Kontoyiannis, Dimitrios P., Ludovico, Paula, Manon, Stéphen, Martegani, Enzo, Mazzoni, Cristina, Megeney, Lynn A., Meisinger, Chris, Nielsen, Jens, Nystroem, Thomas, Osiewacz, Heinz D., Outeiro, Tiago F., Park, Hay-Oak, Pendl, Tobias, Petranovic, Dina, Picot, Stephane, Polčic, Peter, Powers, Ted, Ramsdale, Mark, Rinnerthaler, Mark, Rockenfeller, Patrick, Ruckenstuhl, Christoph, Schaffrath, Raffael, Segovia, Maria, Severin, Fedor F., Sharon, Amir, Sigrist, Stephan J., Sommer-Ruck, Cornelia, Sousa, Maria João, Thevelein, Johan M., Thevissen, Karin, Titorenko, Vladimir, Toledano, Michel B., Tuite, Mick, Voegtle, F. -Nora, Westermann, Benedikt, Winderickx, Joris, Wissing, Silke, Woelfl, Stefan, Zhang, Zhaojie J., Zhao, Richard Y., Zhou, Bing, Galluzzi, Lorenzo, Kroemer, Guido, Madeo, Frank, Carmona-Gutierrez, D, Bauer, M, Zimmermann, A, Aguilera, A, Austriaco, N, Ayscough, K, Balzan, R, Bar-Nun, S, Barrientos, A, Belenky, P, Blondel, M, Braun, R, Breitenbach, M, Burhans, W, Buettner, S, Cavalieri, D, Chang, M, Cooper, K, Côrte-Real, M, Costa, V, Cullin, C, Dawes, I, Dengjel, J, Dickman, M, Eisenberg, T, Fahrenkrog, B, Fasel, N, Froehlich, K, Gargouri, A, Giannattasio, S, Goffrini, P, Gourlay, C, Grant, C, Greenwood, M, Guaragnella, N, Heger, T, Heinisch, J, Herker, E, Herrmann, J, Hofer, S, Jiménez-Ruiz, A, Jungwirth, H, Kainz, K, Kontoyiannis, D, Ludovico, P, Manon, S, Martegani, E, Mazzoni, C, Megeney, L, Meisinger, C, Nielsen, J, Nystroem, T, Osiewacz, H, Outeiro, T, Park, H, Pendl, T, Petranovic, D, Picot, S, Polčic, P, Powers, T, Ramsdale, M, Rinnerthaler, M, Rockenfeller, P, Ruckenstuhl, C, Schaffrath, R, Segovia, M, Severin, F, Sharon, A, Sigrist, S, Sommer-Ruck, C, Sousa, M, Thevelein, J, Thevissen, K, Titorenko, V, Toledano, M, Tuite, M, Voegtle, F, Westermann, B, Winderickx, J, Wissing, S, Woelfl, S, Zhang, Z, Zhao, R, Zhou, B, Galluzzi, L, Kroemer, G, Madeo, F, Carmona-Gutierrez, Didac, Bauer, Maria Anna, Zimmermann, Andreas, Aguilera, Andrés, Austriaco, Nicanor, Ayscough, Kathryn, Balzan, Rena, Bar-Nun, Shoshana, Barrientos, Antonio, Belenky, Peter, Blondel, Marc, Braun, Ralf J., Breitenbach, Michael, Burhans, William C., Buettner, Sabrina, Cavalieri, Duccio, Chang, Michael, Cooper, Katrina F., Côrte-Real, Manuela, Costa, Vítor, Cullin, Christophe, Dawes, Ian, Dengjel, Jörn, Dickman, Martin B., Eisenberg, Tobias, Fahrenkrog, Birthe, Fasel, Nicolas, Froehlich, Kai-Uwe, Gargouri, Ali, Giannattasio, Sergio, Goffrini, Paola, Gourlay, Campbell W., Grant, Chris M., Greenwood, Michael T., Guaragnella, Nicoletta, Heger, Thomas, Heinisch, Juergen, Herker, Eva, Herrmann, Johannes M., Hofer, Sebastian, Jiménez-Ruiz, Antonio, Jungwirth, Helmut, Kainz, Katharina, Kontoyiannis, Dimitrios P., Ludovico, Paula, Manon, Stéphen, Martegani, Enzo, Mazzoni, Cristina, Megeney, Lynn A., Meisinger, Chris, Nielsen, Jens, Nystroem, Thomas, Osiewacz, Heinz D., Outeiro, Tiago F., Park, Hay-Oak, Pendl, Tobias, Petranovic, Dina, Picot, Stephane, Polčic, Peter, Powers, Ted, Ramsdale, Mark, Rinnerthaler, Mark, Rockenfeller, Patrick, Ruckenstuhl, Christoph, Schaffrath, Raffael, Segovia, Maria, Severin, Fedor F., Sharon, Amir, Sigrist, Stephan J., Sommer-Ruck, Cornelia, Sousa, Maria João, Thevelein, Johan M., Thevissen, Karin, Titorenko, Vladimir, Toledano, Michel B., Tuite, Mick, Voegtle, F. -Nora, Westermann, Benedikt, Winderickx, Joris, Wissing, Silke, Woelfl, Stefan, Zhang, Zhaojie J., Zhao, Richard Y., Zhou, Bing, Galluzzi, Lorenzo, Kroemer, Guido, and Madeo, Frank

Abstract

Elucidating the biology of yeast in its full complexity has major implications for science, medicine and industry. One of the most critical processes determining yeast life and physiology is cellular demise. However, the investigation of yeast cell death is a relatively young field, and a widely accepted set of concepts and terms is still missing. Here, we propose unified criteria for the definition of accidental, regulated, and programmed forms of cell death in yeast based on a series of morphological and biochemical criteria. Specifically, we provide consensus guidelines on the differential definition of terms including apoptosis, regulated necrosis, and autophagic cell death, as we refer to additional cell death routines that are relevant for the biology of (at least some species of) yeast. As this area of investigation advances rapidly, changes and extensions to this set of recommendations will be implemented in the years to come. Nonetheless, we strongly encourage the authors, reviewers and editors of scientific articles to adopt these collective standards in order to establish an accurate framework for yeast cell death research and, ultimately, to accelerate the progress of this vibrant field of research.

Published
2018

49. Alternative oxidase induction protects Candida albicans from respiratory stress and promotes hyphal growth

Author

Duvenage, Lucian, Walker, Louise A., Bojarczuk, Aleksandra, Johnston, Simon A., McCallum, Donna M., Munro, Carol, Gourlay, Campbell W., Duvenage, Lucian, Walker, Louise A., Bojarczuk, Aleksandra, Johnston, Simon A., McCallum, Donna M., Munro, Carol, and Gourlay, Campbell W.

Abstract

The human fungal pathogen Candida albicans possesses two genes expressing a cyanide-insensitive Alternative Oxidase (Aox) enzymes in addition to classical and parallel electron transfer chains (ETC). In this study, we examine the role of Aox in C. albicans under conditions of respiratory stress, which may be inflicted during its interaction with the human host or co-colonising bacteria. We find that the level of Aox expression is sufficient to modulate resistance to classical ETC inhibition under respiratory stress and are linked to gene expression changes that can promote both survival and pathogenicity. For example we demonstrate that Aox function is important for the regulation of filamentation in C. albicans and observe that cells lacking Aox function lose virulence in a zebrafish infection model. Our investigations also identify that pyocyanin, a phenazine produced by the co-colonising bacterium Pseudomonas aeruginosa, inhibits Aox-based respiration in C. albicans. These results suggest that Aox plays important roles within respiratory stress response pathways which C. albicans may utilise both as a commensal organism and as a pathogen.

Published
2018

50. Lipotoxicty in yeast: a focus on plasma membrane signalling and membrane contact sites

Author

Rockenfeller, Patrick, Gourlay, Campbell W., Rockenfeller, Patrick, and Gourlay, Campbell W.

Abstract

Lipotoxicity is a pathophysiological process triggered by lipid overload. In metazoans, lipotoxicity is characterised by the ectopic deposition of lipids on organs other than adipose tissue. This leads to organ dysfunction, cell death, and is intimately linked to lipid-associated diseases such as cardiac dysfunction, atherosclerosis, stroke, hepatosteatosis, cancer and the metabolic syndrome. The molecules involved in eliciting lipotoxicity include FAs and their acyl-CoA derivatives, triacylglycerol (TG), diacylglycerol (DG), ceramides, acyl-carnitines and phospholipids. However, the cellular transport of toxic lipids through membrane contact sites (MCS) and vesicular mechanisms as well as lipid metabolism that progress lipotoxicity to the onset of disease are not entirely understood. Yeast has proven a useful model organism to study the molecular mechanisms of lipotoxicity. Recently, the Rim101 pathway, which senses alkaline pH and the lipid status at the plasmamembrane, has been connected to lipotoxicity. In this review article, we summarise recent research advances on the Rim101 pathway and MCS in the context of lipotoxicity in yeast and present a perspective for future research directions.

Published
2018

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