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14 results on '"Cossart P"'

1. Phosphoinositides and host-pathogen interactions. Review

Author

Pizarro-Cerda, J., Kuhbacher, A., Cossart, P., and Publica

Abstract

Phosphoinositides control key cellular processes including vesicular trafficking and actin polymerization. Intracellular bacterial pathogens manipulate phosphoinositide metabolism in order to promote their uptake by target cells and to direct in some cases the biogenesis of their replication compartments. In this chapter, we review the molecular strategies that major pathogens including Listeria, Mycobacterium, Shigella, Salmonella, Legionella and Yersinia use to hijack phosphoinositides during infection. This article is part of a Special Issue entitled Phosphoinositides.

Published
2015

3. Listeria Protein ActA Mimics WASP Family Proteins: It Activates Filament Barbed End Branching by Arp2/3 Complex

Author

Gouin E, Le Clainche C, Hansen G, Pantaloni D, Didry D, Dehoux P, Christine Kocks, Cossart P, M. F. Carlier, Rajaa Boujemaa-Paterski, and Stanislav N. Samarin

Subjects
Movement, Molecular Sequence Data, Wiskott-Aldrich Syndrome Protein, Neuronal, Motility, Arp2/3 complex, Nerve Tissue Proteins, macromolecular substances, Branching (polymer chemistry), Polymerase Chain Reaction, Biochemistry, Protein filament, chemistry.chemical_compound, Bacterial Proteins, Polymer chemistry, Animals, Humans, Amino Acid Sequence, Muscle, Skeletal, Conserved Sequence, Actin, DNA Primers, Base Sequence, Sequence Homology, Amino Acid, biology, Microfilament Proteins, Membrane Proteins, biology.organism_classification, Listeria monocytogenes, Actins, Recombinant Proteins, Cell biology, Cytoskeletal Proteins, Kinetics, Monomer, Models, Chemical, chemistry, Actin-Related Protein 3, Actin-Related Protein 2, Mutagenesis, Site-Directed, Listeria, biology.protein, Rabbits, Shigella, Sequence Alignment, Bacteria
Abstract

Actin-based propulsion of the bacteria Listeria and Shigella mimics the forward movement of the leading edge of motile cells. While Shigella harnesses the eukaryotic protein N-WASp to stimulate actin polymerization and filament branching through Arp2/3 complex, the Listeria surface protein ActA directly activates Arp2/3 complex by an unknown mechanism. Here we show that the N-terminal domain of ActA binds one actin monomer, in a profilin-like fashion, and Arp2/3 complex and mimics the C-terminal domain of WASp family proteins in catalyzing filament barbed end branching by Arp2/3 complex. No evidence is found for side branching of filaments by ActA-activated Arp2/3 complex. Mutations in the conserved acidic (41)DEWEEE(46) and basic (146)KKRRK(150) regions of ActA affect Arp2/3 binding but not G-actin binding. The motility properties of wild-type and mutated Listeria strains in living cells and in the medium reconstituted from pure proteins confirm the conclusions of biochemical experiments. Filament branching is followed by rapid debranching. Debranching is 3-4-fold faster when Arp2/3 is activated by ActA than by the C-terminal domain of N-WASp. VASP is required for efficient propulsion of ActA-coated beads in the reconstituted motility medium, but it does not affect the rates of barbed end branching/debranching by ActA-activated Arp2/3 nor the capping of filaments. VASP therefore affects another still unidentified biochemical reaction that plays an important role in actin-based movement.

Published
2001

4. Guidelines for the use and interpretation of assays for monitoring autophagy

Author

Klionsky, D.J. Abdalla, F.C. Abeliovich, H. Abraham, R.T. Acevedo-Arozena, A. Adeli, K. Agholme, L. Agnello, M. Agostinis, P. Aguirre-Ghiso, J.A. Ahn, H.J. Ait-Mohamed, O. Ait-Si-Ali, S. Akematsu, T. Akira, S. Al-Younes, H.M. Al-Zeer, M.A. Albert, M.L. Albin, R.L. Alegre-Abarrategui, J. Aleo, M.F. Alirezaei, M. Almasan, A. Almonte-Becerril, M. Amano, A. Amaravadi, R. Amarnath, S. Amer, A.O. Andrieu-Abadie, N. Anantharam, V. Ann, D.K. Anoopkumar-Dukie, S. Aoki, H. Apostolova, N. Arancia, G. Aris, J.P. Asanuma, K. Asare, N.Y.O. Ashida, H. Askanas, V. Askew, D.S. Auberger, P. Baba, M. Backues, S.K. Baehrecke, E.H. Bahr, B.A. Bai, X.-Y. Bailly, Y. Baiocchi, R. Baldini, G. Balduini, W. Ballabio, A. Bamber, B.A. Bampton, E.T.W. Bánhegyi, G. Bartholomew, C.R. Bassham, D.C. Bast Jr., R.C. Batoko, H. Bay, B.-H. Beau, I. Béchet, D.M. Begley, T.J. Behl, C. Behrends, C. Bekri, S. Bellaire, B. Bendall, L.J. Benetti, L. Berliocchi, L. Bernardi, H. Bernassola, F. Besteiro, S. Bhatia-Kissova, I. Bi, X. Biard-Piechaczyk, M. Blum, J.S. Boise, L.H. Bonaldo, P. Boone, D.L. Bornhauser, B.C. Bortoluci, K.R. Bossis, I. Bost, F. Bourquin, J.-P. Boya, P. Boyer-Guittaut, M. Bozhkov, P.V. Brady, N.R. Brancolini, C. Brech, A. Brenman, J.E. Brennand, A. Bresnick, E.H. Brest, P. Bridges, D. Bristol, M.L. Brookes, P.S. Brown, E.J. Brumell, J.H. Brunetti-Pierri, N. Brunk, U.T. Bulman, D.E. Bultman, S.J. Bultynck, G. Burbulla, L.F. Bursch, W. Butchar, J.P. Buzgariu, W. Bydlowski, S.P. Cadwell, K. Cahová, M. Cai, D. Cai, J. Cai, Q. Calabretta, B. Calvo-Garrido, J. Camougrand, N. Campanella, M. Campos-Salinas, J. Candi, E. Cao, L. Caplan, A.B. Carding, S.R. Cardoso, S.M. Carew, J.S. Carlin, C.R. Carmignac, V. Carneiro, L.A.M. Carra, S. Caruso, R.A. Casari, G. Casas, C. Castino, R. Cebollero, E. Cecconi, F. Celli, J. Chaachouay, H. Chae, H.-J. Chai, C.-Y. Chan, D.C. Chan, E.Y. Chang, R.C.-C. Che, C.-M. Chen, C.-C. Chen, G.-C. Chen, G.-Q. Chen, M. Chen, Q. Chen, S.S.-L. Chen, W. Chen, X. Chen, X. Chen, X. Chen, Y.-G. Chen, Y. Chen, Y. Chen, Y.-J. Chen, Z. Cheng, A. Cheng, C.H.K. Cheng, Y. Cheong, H. Cheong, J.-H. Cherry, S. Chess-Williams, R. Cheung, Z.H. Chevet, E. Chiang, H.-L. Chiarelli, R. Chiba, T. Chin, L.-S. Chiou, S.-H. Chisari, F.V. Cho, C.H. Cho, D.-H. Choi, A.M.K. Choi, D. Choi, K.S. Choi, M.E. Chouaib, S. Choubey, D. Choubey, V. Chu, C.T. Chuang, T.-H. Chueh, S.-H. Chun, T. Chwae, Y.-J. Chye, M.-L. Ciarcia, R. Ciriolo, M.R. Clague, M.J. Clark, R.S.B. Clarke, P.G.H. Clarke, R. Codogno, P. Coller, H.A. Colombo, M.I. Comincini, S. Condello, M. Condorelli, F. Cookson, M.R. Coombs, G.H. Coppens, I. Corbalan, R. Cossart, P. Costelli, P. Costes, S. Coto-Montes, A. Couve, E. Coxon, F.P. Cregg, J.M. Crespo, J.L. Cronjé, M.J. Cuervo, A.M. Cullen, J.J. Czaja, M.J. D'Amelio, M. Darfeuille-Michaud, A. Davids, L.M. Davies, F.E. De Felici, M. De Groot, J.F. De Haan, C.A.M. De Martino, L. De Milito, A. De Tata, V. Debnath, J. Degterev, A. Dehay, B. Delbridge, L.M.D. Demarchi, F. Deng, Y.Z. Dengjel, J. Dent, P. Denton, D. Deretic, V. Desai, S.D. Devenish, R.J. Di Gioacchino, M. Di Paolo, G. Di Pietro, C. Díaz-Araya, G. Díaz-Laviada, I. Diaz-Meco, M.T. Diaz-Nido, J. Dikic, I. Dinesh-Kumar, S.P. Ding, W.-X. Distelhorst, C.W. Diwan, A. Djavaheri-Mergny, M. Dokudovskaya, S. Dong, Z. Dorsey, F.C. Dosenko, V. Dowling, J.J. Doxsey, S. Dreux, M. Drew, M.E. Duan, Q. Duchosal, M.A. Duff, K. Dugail, I. Durbeej, M. Duszenko, M. Edelstein, C.L. Edinger, A.L. Egea, G. Eichinger, L. Eissa, N.T. Ekmekcioglu, S. El-Deiry, W.S. Elazar, Z. Elgendy, M. Ellerby, L.M. Er Eng, K. Engelbrecht, A.-M. Engelender, S. Erenpreisa, J. Escalante, R. Esclatine, A. Eskelinen, E.-L. Espert, L. Espina, V. Fan, H. Fan, J. Fan, Q.-W. Fan, Z. Fang, S. Fang, Y. Fanto, M. Fanzani, A. Farkas, T. Farré, J.-C. Faure, M. Fechheimer, M. Feng, C.G. Feng, J. Feng, Q. Feng, Y. Fésüs, L. Feuer, R. Figueiredo-Pereira, M.E. Fimia, G.M. Fingar, D.C. Finkbeiner, S. Finkel, T. Finley, K.D. Fiorito, F. Fisher, E.A. Fisher, P.B. Flajolet, M. Florez-McClure, M.L. Florio, S. Fon, E.A. Fornai, F. Fortunato, F. Fotedar, R. Fowler, D.H. Fox, H.S. Franco, R. Frankel, L.B. Fransen, M. Fuentes, J.M. Fueyo, J. Fujii, J. Fujisaki, K. Fujita, E. Fukuda, M. Furukawa, R.H. Gaestel, M. Gailly, P. Gajewska, M. Galliot, B. Galy, V. Ganesh, S. Ganetzky, B. Ganley, I.G. Gao, F.-B. Gao, G.F. Gao, J. Garcia, L. Garcia-Manero, G. Garcia-Marcos, M. Garmyn, M. Gartel, A.L. Gatti, E. Gautel, M. Gawriluk, T.R. Gegg, M.E. Geng, J. Germain, M. Gestwicki, J.E. Gewirtz, D.A. Ghavami, S. Ghosh, P. Giammarioli, A.M. Giatromanolaki, A.N. Gibson, S.B. Gilkerson, R.W. Ginger, M.L. Ginsberg, H.N. Golab, J. Goligorsky, M.S. Golstein, P. Gomez-Manzano, C. Goncu, E. Gongora, C. Gonzalez, C.D. Gonzalez, R. González-Estévez, C. González-Polo, R.A. Gonzalez-Rey, E. Gorbunov, N.V. Gorski, S. Goruppi, S. Gottlieb, R.A. Gozuacik, D. Granato, G.E. Grant, G.D. Green, K.N. Gregorc, A. Gros, F. Grose, C. Grunt, T.W. Gual, P. Guan, J.-L. Guan, K.-L. Guichard, S.M. Gukovskaya, A.S. Gukovsky, I. Gunst, J. Gustafsson, A.B. Halayko, A.J. Hale, A.N. Halonen, S.K. Hamasaki, M. Han, F. Han, T. Hancock, M.K. Hansen, M. Harada, H. Harada, M. Hardt, S.E. Harper, J.W. Harris, A.L. Harris, J. Harris, S.D. Hashimoto, M. Haspel, J.A. Hayashi, S.-I. Hazelhurst, L.A. He, C. He, Y.-W. Hébert, M.-J. Heidenreich, K.A. Helfrich, M.H. Helgason, G.V. Henske, E.P. Herman, B. Herman, P.K. Hetz, C. Hilfiker, S. Hill, J.A. Hocking, L.J. Hofman, P. Hofmann, T.G. Höhfeld, J. Holyoake, T.L. Hong, M.-H. Hood, D.A. Hotamisligil, G.S. Houwerzijl, E.J. Høyer-Hansen, M. Hu, B. Hu, C.-A.A. Hu, H.-M. Hua, Y. Huang, C. Huang, J. Huang, S. Huang, W.-P. Huber, T.B. Huh, W.-K. Hung, T.-H. Hupp, T.R. Hur, G.M. Hurley, J.B. Hussain, S.N.A. Hussey, P.J. Hwang, J.J. Hwang, S. Ichihara, A. Ilkhanizadeh, S. Inoki, K. Into, T. Iovane, V. Iovanna, J.L. Ip, N.Y. Isaka, Y. Ishida, H. Isidoro, C. Isobe, K.-I. Iwasaki, A. Izquierdo, M. Izumi, Y. Jaakkola, P.M. Jäättelä, M. Jackson, G.R. Jackson, W.T. Janji, B. Jendrach, M. Jeon, J.-H. Jeung, E.-B. Jiang, H. Jiang, H. Jiang, J.X. Jiang, M. Jiang, Q. Jiang, X. Jiménez, A. Jin, M. Jin, S. Joe, C.O. Johansen, T. Johnson, D.E. Johnson, G.V.W. Jones, N.L. Joseph, B. Joseph, S.K. Joubert, A.M. Juhász, G. Juillerat-Jeanneret, L. Jung, C.H. Jung, Y.-K. Kaarniranta, K. Kaasik, A. Kabuta, T. Kadowaki, M. Kagedal, K. Kamada, Y. Kaminskyy, V.O. Kampinga, H.H. Kanamori, H. Kang, C. Kang, K.B. Il Kang, K. Kang, R. Kang, Y.-A. Kanki, T. Kanneganti, T.-D. Kanno, H. Kanthasamy, A.G. Kanthasamy, A. Karantza, V. Kaushal, G.P. Kaushik, S. Kawazoe, Y. Ke, P.-Y. Kehrl, J.H. Kelekar, A. Kerkhoff, C. Kessel, D.H. Khalil, H. Kiel, J.A.K.W. Kiger, A.A. Kihara, A. Kim, D.R. Kim, D.-H. Kim, D.-H. Kim, E.-K. Kim, H.-R. Kim, J.-S. Kim, J.H. Kim, J.C. Kim, J.K. Kim, P.K. Kim, S.W. Kim, Y.-S. Kim, Y. Kimchi, A. Kimmelman, A.C. King, J.S. Kinsella, T.J. Kirkin, V. Kirshenbaum, L.A. Kitamoto, K. Kitazato, K. Klein, L. Klimecki, W.T. Klucken, J. Knecht, E. Ko, B.C.B. Koch, J.C. Koga, H. Koh, J.-Y. Koh, Y.H. Koike, M. Komatsu, M. Kominami, E. Kong, H.J. Kong, W.-J. Korolchuk, V.I. Kotake, Y. Koukourakis, M.I. Kouri Flores, J.B. Kovács, A.L. Kraft, C. Krainc, D. Krämer, H. Kretz-Remy, C. Krichevsky, A.M. Kroemer, G. Krüger, R. Krut, O. Ktistakis, N.T. Kuan, C.-Y. Kucharczyk, R. Kumar, A. Kumar, R. Kumar, S. Kundu, M. Kung, H.-J. Kurz, T. Kwon, H.J. La Spada, A.R. Lafont, F. Lamark, T. Landry, J. Lane, J.D. Lapaquette, P. Laporte, J.F. László, L. Lavandero, S. Lavoie, J.N. Layfield, R. Lazo, P.A. Le, W. Le Cam, L. Ledbetter, D.J. Lee, A.J.X. Lee, B.-W. Lee, G.M. Lee, J. Lee, J.-H. Lee, M. Lee, M.-S. Lee, S.H. Leeuwenburgh, C. Legembre, P. Legouis, R. Lehmann, M. Lei, H.-Y. Lei, Q.-Y. Leib, D.A. Leiro, J. Lemasters, J.J. Lemoine, A. Lesniak, M.S. Lev, D. Levenson, V.V. Levine, B. Levy, E. Li, F. Li, J.-L. Li, L. Li, S. Li, W. Li, X.-J. Li, Y.-B. Li, Y.-P. Liang, C. Liang, Q. Liao, Y.-F. Liberski, P.P. Lieberman, A. Lim, H.J. Lim, K.-L. Lim, K. Lin, C.-F. Lin, F.-C. Lin, J. Lin, J.D. Lin, K. Lin, W.-W. Lin, W.-C. Lin, Y.-L. Linden, R. Lingor, P. Lippincott-Schwartz, J. Lisanti, M.P. Liton, P.B. Liu, B. Liu, C.-F. Liu, K. Liu, L. Liu, Q.A. Liu, W. Liu, Y.-C. Liu, Y. Lockshin, R.A. Lok, C.-N. Lonial, S. Loos, B. Lopez-Berestein, G. López-Otín, C. Lossi, L. Lotze, M.T. Lõw, P. Lu, B. Lu, B. Lu, B. Lu, Z. Luciano, F. Lukacs, N.W. Lund, A.H. Lynch-Day, M.A. Ma, Y. Macian, F. MacKeigan, J.P. Macleod, K.F. Madeo, F. Maiuri, L. Maiuri, M.C. Malagoli, D. Malicdan, M.C.V. Malorni, W. Man, N. Mandelkow, E.-M. Manon, S. Manov, I. Mao, K. Mao, X. Mao, Z. Marambaud, P. Marazziti, D. Marcel, Y.L. Marchbank, K. Marchetti, P. Marciniak, S.J. Marcondes, M. Mardi, M. Marfe, G. Mariño, G. Markaki, M. Marten, M.R. Martin, S.J. Martinand-Mari, C. Martinet, W. Martinez-Vicente, M. Masini, M. Matarrese, P. Matsuo, S. Matteoni, R. Mayer, A. Mazure, N.M. McConkey, D.J. McConnell, M.J. McDermott, C. McDonald, C. McInerney, G.M. McKenna, S.L. McLaughlin, B. McLean, P.J. McMaster, C.R. McQuibban, G.A. Meijer, A.J. Meisler, M.H. Meléndez, A. Melia, T.J. Melino, G. Mena, M.A. Menendez, J.A. Menna-Barreto, R.F.S. Menon, M.B. Menzies, F.M. Mercer, C.A. Merighi, A. Merry, D.E. Meschini, S. Meyer, C.G. Meyer, T.F. Miao, C.-Y. Miao, J.-Y. Michels, P.A.M. Michiels, C. Mijaljica, D. Milojkovic, A. Minucci, S. Miracco, C. Miranti, C.K. Mitroulis, I. Miyazawa, K. Mizushima, N. Mograbi, B. Mohseni, S. Molero, X. Mollereau, B. Mollinedo, F. Momoi, T. Monastyrska, I. Monick, M.M. Monteiro, M.J. Moore, M.N. Mora, R. Moreau, K. Moreira, P.I. Moriyasu, Y. Moscat, J. Mostowy, S. Mottram, J.C. Motyl, T. Moussa, C.E.-H. Müller, S. Muller, S. Münger, K. Münz, C. Murphy, L.O. Murphy, M.E. Musarò, A. Mysorekar, I. Nagata, E. Nagata, K. Nahimana, A. Nair, U. Nakagawa, T. Nakahira, K. Nakano, H. Nakatogawa, H. Nanjundan, M. Naqvi, N.I. Narendra, D.P. Narita, M. Navarro, M. Nawrocki, S.T. Nazarko, T.Y. Nemchenko, A. Netea, M.G. Neufeld, T.P. Ney, P.A. Nezis, I.P. Nguyen, H.P. Nie, D. Nishino, I. Nislow, C. Nixon, R.A. Noda, T. Noegel, A.A. Nogalska, A. Noguchi, S. Notterpek, L. Novak, I. Nozaki, T. Nukina, N. Nürnberger, T. Nyfeler, B. Obara, K. Oberley, T.D. Oddo, S. Ogawa, M. Ohashi, T. Okamoto, K. Oleinick, N.L. Oliver, F.J. Olsen, L.J. Olsson, S. Opota, O. Osborne, T.F. Ostrander, G.K. Otsu, K. Ou, J.-H.J. Ouimet, M. Overholtzer, M. Ozpolat, B. Paganetti, P. Pagnini, U. Pallet, N. Palmer, G.E. Palumbo, C. Pan, T. Panaretakis, T. Pandey, U.B. Papackova, Z. Papassideri, I. Paris, I. Park, J. Park, O.K. Parys, J.B. Parzych, K.R. Patschan, S. Patterson, C. Pattingre, S. Pawelek, J.M. Peng, J. Perlmutter, D.H. Perrotta, I. Perry, G. Pervaiz, S. Peter, M. Peters, G.J. Petersen, M. Petrovski, G. Phang, J.M. Piacentini, M. Pierre, P. Pierrefite-Carle, V. Pierron, G. Pinkas-Kramarski, R. Piras, A. Piri, N. Platanias, L.C. Pöggeler, S. Poirot, M. Poletti, A. Poüs, C. Pozuelo-Rubio, M. Prætorius-Ibba, M. Prasad, A. Prescott, M. Priault, M. Produit-Zengaffinen, N. Progulske-Fox, A. Proikas-Cezanne, T. Przedborski, S. Przyklenk, K. Puertollano, R. Puyal, J. Qian, S.-B. Qin, L. Qin, Z.-H. Quaggin, S.E. Raben, N. Rabinowich, H. Rabkin, S.W. Rahman, I. Rami, A. Ramm, G. Randall, G. Randow, F. Rao, V.A. Rathmell, J.C. Ravikumar, B. Ray, S.K. Reed, B.H. Reed, J.C. Reggiori, F. Régnier-Vigouroux, A. Reichert, A.S. Reiners Jr., J.J. Reiter, R.J. Ren, J. Revuelta, J.L. Rhodes, C.J. Ritis, K. Rizzo, E. Robbins, J. Roberge, M. Roca, H. Roccheri, M.C. Rocchi, S. Rodemann, H.P. De Córdoba, S.R. Rohrer, B. Roninson, I.B. Rosen, K. Rost-Roszkowska, M.M. Rouis, M. Rouschop, K.M.A. Rovetta, F. Rubin, B.P. Rubinsztein, D.C. Ruckdeschel, K. Rucker III, E.B. Rudich, A. Rudolf, E. Ruiz-Opazo, N. Russo, R. Rusten, T.E. Ryan, K.M. Ryter, S.W. Sabatini, D.M. Sadoshima, J. Saha, T. Saitoh, T. Sakagami, H. Sakai, Y. Salekdeh, G.H. Salomoni, P. Salvaterra, P.M. Salvesen, G. Salvioli, R. Sanchez, A.M.J. Sánchez-Alcázar, J.A. Sánchez-Prieto, R. Sandri, M. Sankar, U. Sansanwal, P. Santambrogio, L. Saran, S. Sarkar, S. Sarwal, M. Sasakawa, C. Sasnauskiene, A. Sass, M. Sato, K. Sato, M. Schapira, A.H.V. Scharl, M. Schätzl, H.M. Scheper, W. Schiaffino, S. Schneider, C. Schneider, M.E. Schneider-Stock, R. Schoenlein, P.V. Schorderet, D.F. Schüller, C. Schwartz, G.K. Scorrano, L. Sealy, L. Seglen, P.O. Segura-Aguilar, J. Seiliez, I. Seleverstov, O. Sell, C. Seo, J.B. Separovic, D. Setaluri, V. Setoguchi, T. Settembre, C. Shacka, J.J. Shanmugam, M. Shapiro, I.M. Shaulian, E. Shaw, R.J. Shelhamer, J.H. Shen, H.-M. Shen, W.-C. Sheng, Z.-H. Shi, Y. Shibuya, K. Shidoji, Y. Shieh, J.-J. Shih, C.-M. Shimada, Y. Shimizu, S. Shintani, T. Shirihai, O.S. Shore, G.C. Sibirny, A.A. Sidhu, S.B. Sikorska, B. Silva-Zacarin, E.C.M. Simmons, A. Simon, A.K. Simon, H.-U. Simone, C. Simonsen, A. Sinclair, D.A. Singh, R. Sinha, D. Sinicrope, F.A. Sirko, A. Siu, P.M. Sivridis, E. Skop, V. Skulachev, V.P. Slack, R.S. Smaili, S.S. Smith, D.R. Soengas, M.S. Soldati, T. Song, X. Sood, A.K. Soong, T.W. Sotgia, F. Spector, S.A. Spies, C.D. Springer, W. Srinivasula, S.M. Stefanis, L. Steffan, J.S. Stendel, R. Stenmark, H. Stephanou, A. Stern, S.T. Sternberg, C. Stork, B. Strålfors, P. Subauste, C.S. Sui, X. Sulzer, D. Sun, J. Sun, S.-Y. Sun, Z.-J. Sung, J.J.Y. Suzuki, K. Suzuki, T. Swanson, M.S. Swanton, C. Sweeney, S.T. Sy, L.-K. Szabadkai, G. Tabas, I. Taegtmeyer, H. Tafani, M. Takács-Vellai, K. Takano, Y. Takegawa, K. Takemura, G. Takeshita, F. Talbot, N.J. Tan, K.S.W. Tanaka, K. Tanaka, K. Tang, D. Tang, D. Tanida, I. Tannous, B.A. Tavernarakis, N. Taylor, G.S. Taylor, G.A. Taylor, J.P. Terada, A.S. Terman, A. Tettamanti, G. Thevissen, K. Thompson, C.B. Thorburn, A. Thumm, M. Tian, F. Tian, Y. Tocchini-Valentini, G. Tolkovsky, A.M. Tomino, Y. Tönges, L. Tooze, S.A. Tournier, C. Tower, J. Towns, R. Trajkovic, V. Travassos, L.H. Tsai, T.-F. Tschan, M.P. Tsubata, T. Tsung, A. Turk, B. Turner, L.S. Tyagi, S.C. Uchiyama, Y. Ueno, T. Umekawa, M. Umemiya-Shirafuji, R. Unni, V.K. Vaccaro, M.I. Valente, E.M. Van Den Berghe, G. Van Der Klei, I.J. Van Doorn, W.G. Van Dyk, L.F. Van Egmond, M. Van Grunsven, L.A. Vandenabeele, P. Vandenberghe, W.P. Vanhorebeek, I. Vaquero, E.C. Velasco, G. Vellai, T. Vicencio, J.M. Vierstra, R.D. Vila, M. Vindis, C. Viola, G. Viscomi, M.T. Voitsekhovskaja, O.V. Von Haefen, C. Votruba, M. Wada, K. Wade-Martins, R. Walker, C.L. Walsh, C.M. Walter, J. Wan, X.-B. Wang, A. Wang, C. Wang, D. Wang, F. Wang, F. Wang, G. Wang, H. Wang, H.-G. Wang, H.-D. Wang, J. Wang, K. Wang, M. Wang, R.C. Wang, X. Wang, X. Wang, Y.-J. Wang, Y. Wang, Z. Wang, Z.C. Wang, Z. Wansink, D.G. Ward, D.M. Watada, H. Waters, S.L. Webster, P. Wei, L. Weihl, C.C. Weiss, W.A. Welford, S.M. Wen, L.-P. Whitehouse, C.A. Whitton, J.L. Whitworth, A.J. Wileman, T. Wiley, J.W. Wilkinson, S. Willbold, D. Williams, R.L. Williamson, P.R. Wouters, B.G. Wu, C. Wu, D.-C. Wu, W.K.K. Wyttenbach, A. Xavier, R.J. Xi, Z. Xia, P. Xiao, G. Xie, Z. Xie, Z. Xu, D.-Z. Xu, J. Xu, L. Xu, X. Yamamoto, A. Yamamoto, A. Yamashina, S. Yamashita, M. Yan, X. Yanagida, M. Yang, D.-S. Yang, E. Yang, J.-M. Yang, S.Y. Yang, W. Yang, W.Y. Yang, Z. Yao, M.-C. Yao, T.-P. Yeganeh, B. Yen, W.-L. Yin, J.-J. Yin, X.-M. Yoo, O.-J. Yoon, G. Yoon, S.-Y. Yorimitsu, T. Yoshikawa, Y. Yoshimori, T. Yoshimoto, K. You, H.J. Youle, R.J. Younes, A. Yu, L. Yu, L. Yu, S.-W. Yu, W.H. Yuan, Z.-M. Yue, Z. Yun, C.-H. Yuzaki, M. Zabirnyk, O. Silva-Zacarin, E. David Zacks, E. Zacksenhaus, L. Zaffaroni, N. Zakeri, Z. Zeh III, H.J. Zeitlin, S.O. Zhang, H. Zhang, H.-L. Zhang, J. Zhang, J.-P. Zhang, L. Zhang, L. Zhang, M.-Y. Zhang, X.D. Zhao, M. Zhao, Y.-F. Zhao, Y. Zhao, Z.J. Zheng, X. Zhivotovsky, B. Zhong, Q. Zhou, C.-Z. Zhu, C. Zhu, W.-G. Zhu, X.-F. Zhu, X. Zhu, Y. Zoladek, T. Zong, W.-X. Zorzano, A. Zschocke, J. Zuckerbraun, B.

Abstract

In 2008 we published the first set of guidelines for standardizing research in autophagy. Since then, research on this topic has continued to accelerate, and many new scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Accordingly, it is important to update these guidelines for monitoring autophagy in different organisms. Various reviews have described the range of assays that have been used for this purpose. Nevertheless, there continues to be confusion regarding acceptable methods to measure autophagy, especially in multicellular eukaryotes. A key point that needs to be emphasized is that there is a difference between measurements that monitor the numbers or volume of autophagic elements (e.g., autophagosomes or autolysosomes) at any stage of the autophagic process vs. those that measure flux through the autophagy pathway (i.e., the complete process); thus, a block in macroautophagy that results in autophagosome accumulation needs to be differentiated from stimuli that result in increased autophagic activity, defined as increased autophagy induction coupled with increased delivery to, and degradation within, lysosomes (in most higher eukaryotes and some protists such as Dictyostelium) or the vacuole (in plants and fungi). In other words, it is especially important that investigators new to the field understand that the appearance of more autophagosomes does not necessarily equate with more autophagy. In fact, in many cases, autophagosomes accumulate because of a block in trafficking to lysosomes without a concomitant change in autophagosome biogenesis, whereas an increase in autolysosomes may reflect a reduction in degradative activity. Here, we present a set of guidelines for the selection and interpretation of methods for use by investigators who aim to examine macroautophagy and related processes, as well as for reviewers who need to provide realistic and reasonable critiques of papers that are focused on these processes. These guidelines are not meant to be a formulaic set of rules, because the appropriate assays depend in part on the question being asked and the system being used. In addition, we emphasize that no individual assay is guaranteed to be the most appropriate one in every situation, and we strongly recommend the use of multiple assays to monitor autophagy. In these guidelines, we consider these various methods of assessing autophagy and what information can, or cannot, be obtained from them. Finally, by discussing the merits and limits of particular autophagy assays, we hope to encourage technical innovation in the field. © 2012 Landes Bioscience.

Published
2012

6. Listeria monocytogenes bile salt hydrolase is a PrfA-regulated virulence factor involved in the intestinal and hepatic phases of listeriosis

Author

Dussurget, O., Cabanes, D., Dehoux, P., Marc Lecuit, Buchrieser, C., Glaser, P., Cossart, P., European Listeria Genome Consortium, Interactions Bactéries-Cellules, Institut Pasteur [Paris], Génomique des Microorganismes Pathogènes, Institut Pasteur [Paris]-Centre National de la Recherche Scientifique (CNRS), The European Listeria Genome Consortium (P. Glaser, L. Frangeul, C. Buchrieser, C. Rusniok, A. Amend, F. Baquero, P. Berche, H. Bloecker, P. Brandt, T. Chakraborty, A. Charbit, F. Chetouani, E. Couve, A. de Daruvar, P. Dehoux, E. Domann, G. Dominguez-Bernal, E. Duchaud, L. Durant, O. Dussurget, K.-D. Entian, H. Fsihi, F. Garcia-Del Portillo, P. Garrido, L. Gautier, W. Goebel, N. Gomez-Lopez, T. Hain, J. Hauf, D. Jackson, L.-M. Jones, U. Kaerst, J. Kreft, M. Kuhn, F. Kunst, G. Kurapkat, E. Madueno, A. Maitournam, J. Mata Vicente, E. Ng, H. Nedjari, G. Nordsiek, S. Novella, B. de Pablos, J.-C. Perez-Diaz, R. Purcell, B. Remmel, M. Rose, T. Schlueter, N. Simoes, A. Tierrez, J.-A. Vazquez-Boland, H. Voss, J. Wehland and P. Cossart), Institut Pasteur [Paris] (IP), and Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS)

Subjects
MESH: Amidohydrolases, [SDV]Life Sciences [q-bio], MESH: Virulence, MESH: Base Sequence, medicine.disease_cause, MESH: Listeria monocytogenes, Virulence factor, [SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases, Putative gene, Listeriosis, Choloylglycine hydrolase, Pathogen, MESH: Bacterial Proteins, MESH: Mutagenesis, 0303 health sciences, MESH: Gene Expression Regulation, Bacterial, Virulence, MESH: Gene Expression Regulation, Enzymologic, Liver Diseases, 3. Good health, Gastroenteritis, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, MESH: Genes, Bacterial, MESH: Oxygen, MESH: Peptide Termination Factors, Peptide Termination Factors, DNA, Bacterial, MESH: Liver Diseases, MESH: Trans-Activators, Molecular Sequence Data, Biology, Microbiology, MESH: Sequence Homology, Nucleic Acid, Gene Expression Regulation, Enzymologic, Amidohydrolases, 03 medical and health sciences, Listeria monocytogenes, Bacterial Proteins, Sequence Homology, Nucleic Acid, medicine, Molecular Biology, Gene, 030304 developmental biology, MESH: Molecular Sequence Data, Base Sequence, 030306 microbiology, Gene Expression Regulation, Bacterial, biology.organism_classification, MESH: DNA, Bacterial, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, MESH: Gastroenteritis, Oxygen, MESH: Listeriosis, Genes, Bacterial, Mutagenesis, Listeria, Trans-Activators, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

Listeria monocytogenes is a bacterial pathogen causing severe food-borne infections in humans and animals. It can sense and adapt to a variety of harsh microenvironments outside as well as inside the host. Once ingested by a mammalian host, the bacterial pathogen reaches the intestinal lumen, where it encounters bile salts which, in addition to their role in digestion, have antimicrobial activity. Comparison of the L. monocytogenes and Listeria innocua genomes has revealed the presence of an L. monocytogenes-specific putative gene encoding a bile salt hydrolase (BSH). Here, we show that the bsh gene encodes a functional intracellular enzyme in all pathogenic Listeria species. The bsh gene is positively regulated by PrfA, the transcriptional activator of known L. monocytogenes virulence genes. Moreover, BSH activity increases at low oxygen concentration. Deletion of bsh results in decreased resistance to bile in vitro, reduced bacterial faecal carriage after oral infection of the guinea-pigs, reduced virulence and liver colonization after intravenous inoculation of mice. Taken together, these results demonstrate that BSH is a novel PrfA-regulated L. monocytogenes virulence factor involved in the intestinal and hepatic phases of listeriosis.

Published
2002

7. A role for alpha-and beta-catenins in bacterial uptake

Author

Marc Lecuit, Hurme, R., Pizarro-Cerda, J., Ohayon, H., Geiger, B., Cossart, P., Interactions Bactéries-Cellules (UIBC), Institut National de la Recherche Agronomique (INRA)-Institut Pasteur [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Pasteur [Paris], Weizmann Institute of Science [Rehovot, Israël], This work was supported by grants from Pasteur-Weizmann, BIOMED2 European Community, Délégation Générale pour l'Armement, Ministére de l'Education Nationale, de l'Enseignement Supérieur et de la Recherche, and Association pour la Recherche sur le Cancer. M.L. is a Ministére de l'Education Nationale, de l'Enséignement Supérieur et de la Recherche fellow, R.H. is a Human Frontier Science Program fellow, and J.P.-C. is an Association pour la Recherche sur le Cancer fellow. B.G. holds the E. Neter Chair in Cell and Tumor Biology., We thank H. Kiefer for help with the FACS analysis, D. Rimm for the gift of hEcadΔCB cDNA, A. Nagafuchi for the gift of mouse E α-catenin cDNA, W. Gallin for the gift of liver cell adhesion molecule constructs, M.M. Mareel for LoVo and α-catenin negative cells and helpful discussions, M. Takeichi for the gift of the HECD1 hybridoma cell line, P. Gounon for his help with the electron microscope, and L. Braun for the gift of InlB-coated beads., Institut National de la Recherche Agronomique (INRA)-Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Pasteur [Paris] (IP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Pasteur [Paris]-Institut National de la Recherche Agronomique (INRA), and Weizmann Institute of Science

Subjects
MESH: Cytoskeletal Proteins, Listeria, MESH: Trans-Activators, MESH: alpha Catenin, Recombinant Fusion Proteins, [SDV]Life Sciences [q-bio], MESH: beta Catenin, Transfection, MESH: Actins, MESH: Listeria monocytogenes, MESH: Cadherins, Cell Line, MESH: Listeria, [SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases, Tumor Cells, Cultured, MESH: Recombinant Fusion Proteins, Animals, Humans, MESH: Animals, MESH: Tumor Cells, Cultured, beta Catenin, Sequence Deletion, MESH: Humans, MESH: Transfection, Biological Sciences, MESH: Sequence Deletion, Cadherins, Listeria monocytogenes, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, Actins, MESH: Cell Line, Cytoskeletal Proteins, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Trans-Activators, alpha Catenin, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

International audience; Interaction of internalin with E-cadherin promotes entry of Listeria monocytogenes into human epithelial cells. This process requires actin cytoskeleton rearrangements. Here we show, by using a series of stably transfected cell lines expressing E-cadherin variants, that the ectodomain of E-cadherin is sufficient for bacterial adherence and that the intracytoplasmic domain is required for entry. The critical cytoplasmic region was further mapped to the beta-catenin binding domain. Because beta-catenin is known to interact with alpha-catenin, which binds to actin, we generated a fusion molecule consisting of the ectodomain of E-cadherin and the actin binding site of alpha-catenin. Cells expressing this chimera were as permissive as E-cadherin-expressing cells. In agreement with these data, alpha- and beta-catenins as well as E-cadherin clustered and colocalized at the entry site, where F-actin then accumulated. Taken together, these results reveal that E-cadherin, via beta- and alpha-catenins, can trigger dynamic events of actin polymerization and membrane extensions culminating in bacterial uptake.

Published
2000

9. Identification of new loci involved in adhesion of Listeria monocytogenes to eukaryotic cells

Author

Milohanic, E., Pron, B., Berche, P., Gaillard, J. -L, Glaser, P., Amend, A., Baquero-Mochales, F., Bloecker, H., Brandt, P., Carmen Buchrieser, Chakraborty, T., Charbit, A., Couvé, E., Daruvar, A., Dehoux, P., Domann, E., Dominguez-Bernal, G., Durand, L., Entian, K. -D, Frangeul, L., Fsihi, H., Garcia Del Portillo, F., Garrido, P., Goebel, W., Gomez-Lopez, N., Hain, T., Hauf, J., Jackson, D., Kreft, J., Kunst, F., Mata-Vicente, J., Ng, E., Nordsiek, G., Perez-Diaz, J. C., Remmel, B., Rose, M., Rusniok, C., Schlueter, T., Vazquez-Boland, J. A., Voss, H., Wehland, J., and Cossart, P.

11. The naturally-occurring mutation K220T in PrfA results in a loss of Listeria monocytogenes virulence by destabilization of the DNA-binding affinity

Author

Philippe Velge, Herler, M., Johansson, J., Sylvie Roche, Stephanie Temoin, Olivier Grépinet, Federov, A. A., Gracieux, P., Almo, S. C., Goebel, W., Cossart, P., Infectiologie Animale et Santé Publique (UR IASP), Institut National de la Recherche Agronomique (INRA), Independent, and Institut Pasteur [Paris]

Subjects
[SDV]Life Sciences [q-bio], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

12. HadA is an atypical new multifunctional trimeric coiled-coil adhesin ofHaemophilus influenzaebiogroupaegyptius, which promotes entry into host cells

Author

Anna Rita Taddei, Davide Serruto, Mariagrazia Pizza, Beatrice Aricò, Rino Rappuoli, Marco R. Oggioni, Sonja Höhle, Stefania Bambini, Esteban Veiga, Maria Scarselli, Tiziana Spadafina, Ilaria Ferlenghi, Vega Masignani, Pascale Cossart, Mogens Kilian, Silvana Savino, Maurizio Comanducci, Serruto D, Spadafina T, Scarselli M, Bambini S, Comanducci M, Höhle S, Kilian M, Veiga E, Cossart P, Oggioni MR, Savino S, Ferlenghi I, Taddei AR, Rappuoli R, Pizza M, Masignani V, and Aricò B

Subjects
DNA, Bacterial, Models, Molecular, Haemophilus influenzae biogroup aegyptius, Sequence analysis, Molecular Sequence Data, Immunology, Protein function, Sequence Homology, Bacterial genome size, medicine.disease_cause, Microbiology, Bacterial Adhesion, Cell Line, Bacterial Proteins, Virology, medicine, Humans, Brazilian purpuric fever, Adhesins, Bacterial, Protein Structure, Quaternary, Escherichia coli, Phylogeny, Binding Sites, biology, Neisseria meningitidis, Computational Biology, Genomics, Sequence Analysis, DNA, medicine.disease, biology.organism_classification, Entry into host, Haemophilus influenzae, Bacterial adhesin, Protein structure
Abstract

Summary The Oca (Oligomeric coiled-coil adhesin) family is a subgroup of the bacterial trimeric autotrans- porter adhesins, which includes structurally related proteins, such as YadA of Yersinia entero- colitica and NadA of Neisseria meningitidis. In this study, we searched in silico for novel members of this family in bacterial genomes and identified HadA (Haemophilus adhesin A), a trimeric autotransporter expressed only by Haemophilus influenzae biogroup aegyptius causing Brazilian purpuric fever (BPF), a fulminant septicemic disease of children. By comparative genomics and sequence analysis we predicted that the hadA gene is harboured on a mobile genetic element unique to BPF isolates. Biological analysis of HadA in the native background was limited because this organism is not amenable to genetic manipulation. Alternatively, we demonstrated that expression of HadA confers to a non-invasive Escherichia coli strain the ability to adhere to human cells and to extracellular matrix proteins and to induce in vitro bacterial aggregation and microcolony formation. Intriguingly, HadA is pre- dicted to lack the typical N-terminal head domain of Oca proteins generally associated with cellular receptor binding. We propose here a structural model of the HadA coiled-coil stalk and show that the N-terminal region is still responsible of the binding activity and a KGD motif plays a role. Interestingly, HadA promotes bacterial entry into mammalian cells. Our results show a cytoskeleton re-arrangement and an involvement of clathrin in the HadA-mediated internalization. These data give new insights on the structure-function relationship of oligomeric coiled-coil adhesins and suggest a potential role of this protein in the pathogenesis of BPF.

Published
2009

13. The timing of IFNb production affects early innate responses to Listeria monocytogenes and determines the overall outcome of lethal infection

Author

Ivan Zanoni, Paola Ricciardi-Castagnoli, Francesca Pontiroli, Pascale Cossart, Ottavio Beretta, Olivier Dussurget, Matteo Urbano, Francesca Granucci, Maria Foti, Pontiroli, F, Dussurget, O, Zanoni, I, Urbano, M, Beretta, O, Granucci, F, Castagnoli, P, Cossart, P, Foti, M, Università degli Studi di Milano = University of Milan (UNIMI), Interactions Bactéries-Cellules (UIBC), Institut National de la Recherche Agronomique (INRA)-Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM), Singapore Immunol Network, Partenaires INRAE, Italian Ministry of Education and Research (COFIN), European Union [TOLERAGE: HEALTH-F4-2008-202156, FIGHT-MG: Health-2009-242210], European Project: 202156,HEALTH,FP7-HEALTH-2007-A,TOLERAGE(2008), European Project: 242210,EC:FP7:HEALTH,FP7-HEALTH-2009-single-stage,FIGHT-MG(2009), Università degli Studi di Milano [Milano] (UNIMI), Institut National de la Recherche Agronomique (INRA)-Institut Pasteur [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM), ProdInra, Migration, Normalisation of immune reactivity in old age - from basic mechanisms to clinical application - TOLERAGE - - HEALTH2008-04-01 - 2012-09-30 - 202156 - VALID, and Myasthenias, a group of immune mediated neurological diseases: from etiology to therapy. - FIGHT-MG - - EC:FP7:HEALTH2009-12-01 - 2014-05-31 - 242210 - VALID

Subjects
Bacterial Diseases, Male, Time Factors, CD8-ALPHA(+) DENDRITIC CELLS, I INTERFERON RECEPTOR, NATURAL-KILLER-CELLS, CD8(+) T-CELLS, BACTERIAL-INFECTION, IMMUNE-RESPONSES, ALPHA-BETA, MACROPHAGE ACTIVATION, MONOCLONAL-ANTIBODY, GAMMA-INTERFERON, Mouse, [SDV]Life Sciences [q-bio], medicine.disease_cause, Monocytes, Mice, 0302 clinical medicine, Interferon, Cytotoxic T cell, Listeriosis, IRGs, Cells, Cultured, Oligonucleotide Array Sequence Analysis, Innate immunity, 0303 health sciences, Multidisciplinary, Reverse Transcriptase Polymerase Chain Reaction, MED/04 - PATOLOGIA GENERALE, Genomics, Animal Models, Prognosis, Functional Genomics, Bacterial Pathogens, 3. Good health, Host-Pathogen Interaction, Killer Cells, Natural, [SDV] Life Sciences [q-bio], Infectious Diseases, medicine.anatomical_structure, Host-Pathogen Interactions, Cytokines, Medicine, Female, Listeria infection, Research Article, medicine.drug, Cell Survival, dendritic cell, Science, Immune Cells, Immunology, Spleen, Context (language use), Biology, Microbiology, 03 medical and health sciences, Model Organisms, Listeria monocytogenes, medicine, Animals, NK cell, Immunity to Infections, 030304 developmental biology, Gram Positive, Innate immune system, Gene Expression Profiling, Immunity, Immunoregulation, Dendritic Cells, Interferon-beta, Survival Analysis, Coculture Techniques, Immunity, Innate, CD8A, Mice, Inbred C57BL, Immune System, Genome Expression Analysis, type I IFN, 030215 immunology
Abstract

International audience; Dendritic cells (DCs) and natural killer (NK) cells are essential components of the innate immunity and play a crucial role in the first phase of host defense against infections and tumors. Listeria monocytogenes (Lm) is an intracellular pathogen that colonizes the cytosol of eukaryotic cells. Recent findings have shown Lm specifically in splenic CD8a(+) DCs shortly after intravenous infection. We examined gene expression profiles of mouse DCs exposed to Lm to elucidate the molecular mechanisms underlying DCs interaction with Lm. Using a functional genomics approach, we found that Lm infection induced a cluster of late response genes including type I IFNs and interferon responsive genes (IRGs) in DCs. Type I INFs were produced at the maximal level only at 24 h post infection indicating that the regulation of IFNs in the context of Lm infection is delayed compared to the rapid response observed with viral pathogens. We showed that during Lm infection, IFN gamma production and cytotoxic activity were severely impaired in NK cells compared to E. coli infection. These defects were restored by providing an exogenous source of IFN beta during the initial phase of bacterial challenge. Moreover, when treated with IFN beta during early infection, NK cells were able to reduce bacterial titer in the spleen and significantly improve survival of infected mice. These findings show that the timing of IFN beta production is fundamental to the efficient control of the bacterium during the early innate phase of Lm infection.

Published
2012

14. WASP-related proteins, Abi1 and Ena/VASP are required for Listeria invasion induced by the Met receptor

Author

Frank B. Gertler, Giorgio Scita, Pascale Cossart, Hélène Bierne, Hiroaki Miki, Metello Innocenti, Tadaomi Takenawa, ProdInra, Migration, Interactions Bactéries-Cellules (UIBC), Institut National de la Recherche Agronomique (INRA)-Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM), The University of Tokyo (UTokyo), Japan Science and Technology Agency (JST), European Institute of Oncology [Milan] (ESMO), IFOM, Istituto FIRC di Oncologia Molecolare (IFOM), Massachusetts Institute of Technology (MIT), This work was supported by INRA, the Pasteur Institute (GPH No. 9), INSERM, the Ministère de l'Education Nationale et de la Recherche Scientifique et Technique (ACI Microbiologie Mic 0312) and by the ARC (4404XA0130F). F.B.G. is supported by NIH GM58801. H.B. is on the INRA staff. P.C. is an international research scholar from the Howard Hughes Medical Institute., Institut National de la Recherche Agronomique (INRA)-Institut Pasteur [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM), Bierne, H, Miki, H, Innocenti, M, Scita, G, Gertler, F, Takenawa, T, and Cossart, P

Subjects
Small interfering RNA, Membrane ruffling, media_common.quotation_subject, [SDV]Life Sciences [q-bio], Wiskott-Aldrich Syndrome Protein, Neuronal, Nerve Tissue Proteins, macromolecular substances, CYTOSKELETON, Biology, ACTIN, PHAGOCYTOSIS, 03 medical and health sciences, Bacterial Proteins, RNA interference, Chlorocebus aethiops, Animals, Humans, HGF, Cdc42, RNA, Small Interfering, Internalization, Cytoskeleton, Vero Cells, Adaptor Proteins, Signal Transducing, Listeria monocytogene, 030304 developmental biology, media_common, Phagocytosi, 0303 health sciences, Effector, LISTERIA MONOCYTOGENES, Cell Membrane, Microfilament Proteins, 030302 biochemistry & molecular biology, Membrane Proteins, Ena/Vasp homology proteins, Cell Biology, Proto-Oncogene Proteins c-met, Wiskott-Aldrich Syndrome Protein Family, Cell biology, Rac, DNA-Binding Proteins, [SDV] Life Sciences [q-bio], Cytoskeletal Proteins, Hepatocyte Growth Factor Receptor, HeLa Cells, Signal Transduction
Abstract

International audience; Internalisation of the pathogenic bacterium Listeria monocytogenes involves interactions between the invasion protein InlB and the hepatocyte growth factor receptor, Met. Using colocalisation studies, dominant-negative constructs and small interfering RNA (siRNA), we demonstrate a cell-type-dependent requirement for various WASP-related proteins in Listeria entry and InlB-induced membrane ruffling. The WAVE2 isoform is essential for InlB-induced cytoskeletal rearrangements in Vero cells. In HeLa cells, WAVE1, WAVE2 and N-WASP cooperate to promote these processes. Abi1, a key component of WAVE complexes, is recruited at the entry site in both cell types and its inactivation by RNA interference impairs InlB-mediated processes. Ena/VASP proteins also play a role in Listeria internalization, and their deregulation by sequestration or overexpression, modifies actin cups beneath entering particles. Taken together, these results identify the WAVE complex, N-WASP and Ena/VASP as key effectors of the Met signalling pathway and of Listeria entry and highlight the existence of redundant and/or cooperative functions among WASP-family members.

Published
2005

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