Search

Your search keyword '"Gaston, Daniel"' showing total 11 results
Start Over Author "Gaston, Daniel" Publication Type Electronic Resources
11 results on '"Gaston, Daniel"'

1. Association of Rare CYP39A1 Variants with Exfoliation Syndrome Involving the Anterior Chamber of the Eye

Author

Li, Zheng, Wang, Zhenxun, Lee, Mei Chin, Zenkel, Matthias, Peh, Esther, Ozaki, Mineo, Topouzis, Fotis, Nakano, Satoko, Chan, Anita, Chen, Shuwen, Williams, Susan E.I., Orr, Andrew, Nakano, Masakazu, Kobakhidze, Nino, Zarnowski, Tomasz, Popa-Cherecheanu, Alina, Mizoguchi, Takanori, Manabe, Shin Ichi, Hayashi, Ken, Kazama, Shigeyasu, Inoue, Kenji, Mori, Yosai, Miyata, Kazunori, Sugiyama, Kazuhisa, Higashide, Tomomi, Chihara, Etsuo, Ideta, Ryuichi, Ishiko, Satoshi, Yoshida, Akitoshi, Tokumo, Kana, Kiuchi, Yoshiaki, Ohashi, Tsutomu, Sakurai, Toshiya, Sugimoto, Takako, Chuman, Hideki, Aihara, Makoto, Inatani, Masaru, Mori, Kazuhiko, Ikeda, Yoko, Ueno, Morio, Gaston, Daniel, Rafuse, Paul, Shuba, Lesya, Saunders, Joseph, Nicolela, Marcelo, Chichua, George, Tabagari, Sergo, Founti, Panayiota, Sim, Kar Seng, Meah, Wee Yang, Soo, Hui Meng, Chen, Xiao Yin, Chatzikyriakidou, Anthi, Keskini, Christina, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Panagiotou, Evangelia S., Mikropoulos, Dimitrios G., Kosior-Jarecka, Ewa, Cheong, Augustine, Li, Yuanhan, Lukasik, Urszula, Nongpiur, Monisha E., Husain, Rahat, Perera, Shamira A., Álvarez, Lydia, García, Montserrat, González-Iglesias, Héctor, Cueto, Andrés F.V., Cueto, Luis F.V., Martinón-Torres, Federico, Salas, Antonio, Oguz, Çilingir, Tamcelik, Nevbahar, Atalay, Eray, Batu, Bilge, Irkec, Murat, Aktas, Dilek, Kasim, Burcu, Astakhov, Yury S., Astakhov, Sergei Y., Akopov, Eugeny L., Giessl, Andreas, Mardin, Christian, Hellerbrand, Claus, Cooke Bailey, Jessica N., Igo, Robert P., Haines, Jonathan L., Edward, Deepak P., Heegaard, Steffen, Davila, Sonia, Tan, Patrick, Kang, Jae H., Pasquale, Louis R., Kruse, Friedrich E., Reis, André, Carmichael, Trevor R., Hauser, Michael, Ramsay, Michele, Mossböck, Georg, Yildirim, Nilgun, Tashiro, Kei, Konstas, Anastasios G.P., Coca-Prados, Miguel, Foo, Jia Nee, Kinoshita, Shigeru, Sotozono, Chie, Kubota, Toshiaki, Dubina, Michael, Ritch, Robert, Wiggs, Janey L., Pasutto, Francesca, Schlötzer-Schrehardt, Ursula, Ho, Ying Swan, Aung, Tin, Tam, Wai Leong, Khor, Chiea Chuen, Li, Zheng, Wang, Zhenxun, Lee, Mei Chin, Zenkel, Matthias, Peh, Esther, Ozaki, Mineo, Topouzis, Fotis, Nakano, Satoko, Chan, Anita, Chen, Shuwen, Williams, Susan E.I., Orr, Andrew, Nakano, Masakazu, Kobakhidze, Nino, Zarnowski, Tomasz, Popa-Cherecheanu, Alina, Mizoguchi, Takanori, Manabe, Shin Ichi, Hayashi, Ken, Kazama, Shigeyasu, Inoue, Kenji, Mori, Yosai, Miyata, Kazunori, Sugiyama, Kazuhisa, Higashide, Tomomi, Chihara, Etsuo, Ideta, Ryuichi, Ishiko, Satoshi, Yoshida, Akitoshi, Tokumo, Kana, Kiuchi, Yoshiaki, Ohashi, Tsutomu, Sakurai, Toshiya, Sugimoto, Takako, Chuman, Hideki, Aihara, Makoto, Inatani, Masaru, Mori, Kazuhiko, Ikeda, Yoko, Ueno, Morio, Gaston, Daniel, Rafuse, Paul, Shuba, Lesya, Saunders, Joseph, Nicolela, Marcelo, Chichua, George, Tabagari, Sergo, Founti, Panayiota, Sim, Kar Seng, Meah, Wee Yang, Soo, Hui Meng, Chen, Xiao Yin, Chatzikyriakidou, Anthi, Keskini, Christina, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Panagiotou, Evangelia S., Mikropoulos, Dimitrios G., Kosior-Jarecka, Ewa, Cheong, Augustine, Li, Yuanhan, Lukasik, Urszula, Nongpiur, Monisha E., Husain, Rahat, Perera, Shamira A., Álvarez, Lydia, García, Montserrat, González-Iglesias, Héctor, Cueto, Andrés F.V., Cueto, Luis F.V., Martinón-Torres, Federico, Salas, Antonio, Oguz, Çilingir, Tamcelik, Nevbahar, Atalay, Eray, Batu, Bilge, Irkec, Murat, Aktas, Dilek, Kasim, Burcu, Astakhov, Yury S., Astakhov, Sergei Y., Akopov, Eugeny L., Giessl, Andreas, Mardin, Christian, Hellerbrand, Claus, Cooke Bailey, Jessica N., Igo, Robert P., Haines, Jonathan L., Edward, Deepak P., Heegaard, Steffen, Davila, Sonia, Tan, Patrick, Kang, Jae H., Pasquale, Louis R., Kruse, Friedrich E., Reis, André, Carmichael, Trevor R., Hauser, Michael, Ramsay, Michele, Mossböck, Georg, Yildirim, Nilgun, Tashiro, Kei, Konstas, Anastasios G.P., Coca-Prados, Miguel, Foo, Jia Nee, Kinoshita, Shigeru, Sotozono, Chie, Kubota, Toshiaki, Dubina, Michael, Ritch, Robert, Wiggs, Janey L., Pasutto, Francesca, Schlötzer-Schrehardt, Ursula, Ho, Ying Swan, Aung, Tin, Tam, Wai Leong, and Khor, Chiea Chuen

Abstract

Importance: Exfoliation syndrome is a systemic disorder characterized by progressive accumulation of abnormal fibrillar protein aggregates manifesting clinically in the anterior chamber of the eye. This disorder is the most commonly known cause of glaucoma and a major cause of irreversible blindness. Objective: To determine if exfoliation syndrome is associated with rare, protein-changing variants predicted to impair protein function. Design, Setting, and Participants: A 2-stage, case-control, whole-exome sequencing association study with a discovery cohort and 2 independently ascertained validation cohorts. Study participants from 14 countries were enrolled between February 1999 and December 2019. The date of last clinical follow-up was December 2019. Affected individuals had exfoliation material on anterior segment structures of at least 1 eye as visualized by slit lamp examination. Unaffected individuals had no signs of exfoliation syndrome. Exposures: Rare, coding-sequence genetic variants predicted to be damaging by bioinformatic algorithms trained to recognize alterations that impair protein function. Main Outcomes and Measures: The primary outcome was the presence of exfoliation syndrome. Exome-wide significance for detected variants was defined as P < 2.5 × 10-6. The secondary outcomes included biochemical enzymatic assays and gene expression analyses. Results: The discovery cohort included 4028 participants with exfoliation syndrome (median age, 78 years [interquartile range, 73-83 years]; 2377 [59.0%] women) and 5638 participants without exfoliation syndrome (median age, 72 years [interquartile range, 65-78 years]; 3159 [56.0%] women). In the discovery cohort, persons with exfoliation syndrome, compared with those without exfoliation syndrome, were significantly more likely to carry damaging CYP39A1 variants (1.3% vs 0.30%, respectively; odds ratio, 3.55 [95% CI, 2.07-6.10]; P = 6.1 × 10-7). This outcome was validated in 2 independent cohorts. The fi

Published
2021

2. Genetic association study of exfoliation syndrome identifies a protective rare variant at LOXL1 and five new susceptibility loci.

Author

Aung, Tin, Aung, Tin, Ozaki, Mineo, Lee, Mei Chin, Schlötzer-Schrehardt, Ursula, Thorleifsson, Gudmar, Mizoguchi, Takanori, Igo, Robert P, Haripriya, Aravind, Williams, Susan E, Astakhov, Yury S, Orr, Andrew C, Burdon, Kathryn P, Nakano, Satoko, Mori, Kazuhiko, Abu-Amero, Khaled, Hauser, Michael, Li, Zheng, Prakadeeswari, Gopalakrishnan, Bailey, Jessica N Cooke, Cherecheanu, Alina Popa, Kang, Jae H, Nelson, Sarah, Hayashi, Ken, Manabe, Shin-Ichi, Kazama, Shigeyasu, Zarnowski, Tomasz, Inoue, Kenji, Irkec, Murat, Coca-Prados, Miguel, Sugiyama, Kazuhisa, Järvelä, Irma, Schlottmann, Patricio, Lerner, S Fabian, Lamari, Hasnaa, Nilgün, Yildirim, Bikbov, Mukharram, Park, Ki Ho, Cha, Soon Cheol, Yamashiro, Kenji, Zenteno, Juan C, Jonas, Jost B, Kumar, Rajesh S, Perera, Shamira A, Chan, Anita SY, Kobakhidze, Nino, George, Ronnie, Vijaya, Lingam, Do, Tan, Edward, Deepak P, de Juan Marcos, Lourdes, Pakravan, Mohammad, Moghimi, Sasan, Ideta, Ryuichi, Bach-Holm, Daniella, Kappelgaard, Per, Wirostko, Barbara, Thomas, Samuel, Gaston, Daniel, Bedard, Karen, Greer, Wenda L, Yang, Zhenglin, Chen, Xueyi, Huang, Lulin, Sang, Jinghong, Jia, Hongyan, Jia, Liyun, Qiao, Chunyan, Zhang, Hui, Liu, Xuyang, Zhao, Bowen, Wang, Ya-Xing, Xu, Liang, Leruez, Stéphanie, Reynier, Pascal, Chichua, George, Tabagari, Sergo, Uebe, Steffen, Zenkel, Matthias, Berner, Daniel, Mossböck, Georg, Weisschuh, Nicole, Hoja, Ursula, Welge-Luessen, Ulrich-Christoph, Mardin, Christian, Founti, Panayiota, Chatzikyriakidou, Anthi, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Ghosh, Arkasubhra, Shetty, Rohit, Porporato, Natalia, Saravanan, Vijayan, Venkatesh, Rengaraj, Shivkumar, Chandrashekaran, Kalpana, Narendran, Sarangapani, Sripriya, Kanavi, Mozhgan R, Beni, Afsaneh Naderi, Yazdani, Shahin, Aung, Tin, Aung, Tin, Ozaki, Mineo, Lee, Mei Chin, Schlötzer-Schrehardt, Ursula, Thorleifsson, Gudmar, Mizoguchi, Takanori, Igo, Robert P, Haripriya, Aravind, Williams, Susan E, Astakhov, Yury S, Orr, Andrew C, Burdon, Kathryn P, Nakano, Satoko, Mori, Kazuhiko, Abu-Amero, Khaled, Hauser, Michael, Li, Zheng, Prakadeeswari, Gopalakrishnan, Bailey, Jessica N Cooke, Cherecheanu, Alina Popa, Kang, Jae H, Nelson, Sarah, Hayashi, Ken, Manabe, Shin-Ichi, Kazama, Shigeyasu, Zarnowski, Tomasz, Inoue, Kenji, Irkec, Murat, Coca-Prados, Miguel, Sugiyama, Kazuhisa, Järvelä, Irma, Schlottmann, Patricio, Lerner, S Fabian, Lamari, Hasnaa, Nilgün, Yildirim, Bikbov, Mukharram, Park, Ki Ho, Cha, Soon Cheol, Yamashiro, Kenji, Zenteno, Juan C, Jonas, Jost B, Kumar, Rajesh S, Perera, Shamira A, Chan, Anita SY, Kobakhidze, Nino, George, Ronnie, Vijaya, Lingam, Do, Tan, Edward, Deepak P, de Juan Marcos, Lourdes, Pakravan, Mohammad, Moghimi, Sasan, Ideta, Ryuichi, Bach-Holm, Daniella, Kappelgaard, Per, Wirostko, Barbara, Thomas, Samuel, Gaston, Daniel, Bedard, Karen, Greer, Wenda L, Yang, Zhenglin, Chen, Xueyi, Huang, Lulin, Sang, Jinghong, Jia, Hongyan, Jia, Liyun, Qiao, Chunyan, Zhang, Hui, Liu, Xuyang, Zhao, Bowen, Wang, Ya-Xing, Xu, Liang, Leruez, Stéphanie, Reynier, Pascal, Chichua, George, Tabagari, Sergo, Uebe, Steffen, Zenkel, Matthias, Berner, Daniel, Mossböck, Georg, Weisschuh, Nicole, Hoja, Ursula, Welge-Luessen, Ulrich-Christoph, Mardin, Christian, Founti, Panayiota, Chatzikyriakidou, Anthi, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Ghosh, Arkasubhra, Shetty, Rohit, Porporato, Natalia, Saravanan, Vijayan, Venkatesh, Rengaraj, Shivkumar, Chandrashekaran, Kalpana, Narendran, Sarangapani, Sripriya, Kanavi, Mozhgan R, Beni, Afsaneh Naderi, and Yazdani, Shahin

Abstract

Exfoliation syndrome (XFS) is the most common known risk factor for secondary glaucoma and a major cause of blindness worldwide. Variants in two genes, LOXL1 and CACNA1A, have previously been associated with XFS. To further elucidate the genetic basis of XFS, we collected a global sample of XFS cases to refine the association at LOXL1, which previously showed inconsistent results across populations, and to identify new variants associated with XFS. We identified a rare protective allele at LOXL1 (p.Phe407, odds ratio (OR) = 25, P = 2.9 × 10-14) through deep resequencing of XFS cases and controls from nine countries. A genome-wide association study (GWAS) of XFS cases and controls from 24 countries followed by replication in 18 countries identified seven genome-wide significant loci (P < 5 × 10-8). We identified association signals at 13q12 (POMP), 11q23.3 (TMEM136), 6p21 (AGPAT1), 3p24 (RBMS3) and 5q23 (near SEMA6A). These findings provide biological insights into the pathology of XFS and highlight a potential role for naturally occurring rare LOXL1 variants in disease biology.

Published
2017

3. Genetic association study of exfoliation syndrome identifies a protective rare variant at LOXL1 and five new susceptibility loci.

Author

Aung, Tin, Aung, Tin, Ozaki, Mineo, Lee, Mei Chin, Schlötzer-Schrehardt, Ursula, Thorleifsson, Gudmar, Mizoguchi, Takanori, Igo, Robert P, Haripriya, Aravind, Williams, Susan E, Astakhov, Yury S, Orr, Andrew C, Burdon, Kathryn P, Nakano, Satoko, Mori, Kazuhiko, Abu-Amero, Khaled, Hauser, Michael, Li, Zheng, Prakadeeswari, Gopalakrishnan, Bailey, Jessica N Cooke, Cherecheanu, Alina Popa, Kang, Jae H, Nelson, Sarah, Hayashi, Ken, Manabe, Shin-Ichi, Kazama, Shigeyasu, Zarnowski, Tomasz, Inoue, Kenji, Irkec, Murat, Coca-Prados, Miguel, Sugiyama, Kazuhisa, Järvelä, Irma, Schlottmann, Patricio, Lerner, S Fabian, Lamari, Hasnaa, Nilgün, Yildirim, Bikbov, Mukharram, Park, Ki Ho, Cha, Soon Cheol, Yamashiro, Kenji, Zenteno, Juan C, Jonas, Jost B, Kumar, Rajesh S, Perera, Shamira A, Chan, Anita SY, Kobakhidze, Nino, George, Ronnie, Vijaya, Lingam, Do, Tan, Edward, Deepak P, de Juan Marcos, Lourdes, Pakravan, Mohammad, Moghimi, Sasan, Ideta, Ryuichi, Bach-Holm, Daniella, Kappelgaard, Per, Wirostko, Barbara, Thomas, Samuel, Gaston, Daniel, Bedard, Karen, Greer, Wenda L, Yang, Zhenglin, Chen, Xueyi, Huang, Lulin, Sang, Jinghong, Jia, Hongyan, Jia, Liyun, Qiao, Chunyan, Zhang, Hui, Liu, Xuyang, Zhao, Bowen, Wang, Ya-Xing, Xu, Liang, Leruez, Stéphanie, Reynier, Pascal, Chichua, George, Tabagari, Sergo, Uebe, Steffen, Zenkel, Matthias, Berner, Daniel, Mossböck, Georg, Weisschuh, Nicole, Hoja, Ursula, Welge-Luessen, Ulrich-Christoph, Mardin, Christian, Founti, Panayiota, Chatzikyriakidou, Anthi, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Ghosh, Arkasubhra, Shetty, Rohit, Porporato, Natalia, Saravanan, Vijayan, Venkatesh, Rengaraj, Shivkumar, Chandrashekaran, Kalpana, Narendran, Sarangapani, Sripriya, Kanavi, Mozhgan R, Beni, Afsaneh Naderi, Yazdani, Shahin, Aung, Tin, Aung, Tin, Ozaki, Mineo, Lee, Mei Chin, Schlötzer-Schrehardt, Ursula, Thorleifsson, Gudmar, Mizoguchi, Takanori, Igo, Robert P, Haripriya, Aravind, Williams, Susan E, Astakhov, Yury S, Orr, Andrew C, Burdon, Kathryn P, Nakano, Satoko, Mori, Kazuhiko, Abu-Amero, Khaled, Hauser, Michael, Li, Zheng, Prakadeeswari, Gopalakrishnan, Bailey, Jessica N Cooke, Cherecheanu, Alina Popa, Kang, Jae H, Nelson, Sarah, Hayashi, Ken, Manabe, Shin-Ichi, Kazama, Shigeyasu, Zarnowski, Tomasz, Inoue, Kenji, Irkec, Murat, Coca-Prados, Miguel, Sugiyama, Kazuhisa, Järvelä, Irma, Schlottmann, Patricio, Lerner, S Fabian, Lamari, Hasnaa, Nilgün, Yildirim, Bikbov, Mukharram, Park, Ki Ho, Cha, Soon Cheol, Yamashiro, Kenji, Zenteno, Juan C, Jonas, Jost B, Kumar, Rajesh S, Perera, Shamira A, Chan, Anita SY, Kobakhidze, Nino, George, Ronnie, Vijaya, Lingam, Do, Tan, Edward, Deepak P, de Juan Marcos, Lourdes, Pakravan, Mohammad, Moghimi, Sasan, Ideta, Ryuichi, Bach-Holm, Daniella, Kappelgaard, Per, Wirostko, Barbara, Thomas, Samuel, Gaston, Daniel, Bedard, Karen, Greer, Wenda L, Yang, Zhenglin, Chen, Xueyi, Huang, Lulin, Sang, Jinghong, Jia, Hongyan, Jia, Liyun, Qiao, Chunyan, Zhang, Hui, Liu, Xuyang, Zhao, Bowen, Wang, Ya-Xing, Xu, Liang, Leruez, Stéphanie, Reynier, Pascal, Chichua, George, Tabagari, Sergo, Uebe, Steffen, Zenkel, Matthias, Berner, Daniel, Mossböck, Georg, Weisschuh, Nicole, Hoja, Ursula, Welge-Luessen, Ulrich-Christoph, Mardin, Christian, Founti, Panayiota, Chatzikyriakidou, Anthi, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Ghosh, Arkasubhra, Shetty, Rohit, Porporato, Natalia, Saravanan, Vijayan, Venkatesh, Rengaraj, Shivkumar, Chandrashekaran, Kalpana, Narendran, Sarangapani, Sripriya, Kanavi, Mozhgan R, Beni, Afsaneh Naderi, and Yazdani, Shahin

Abstract

Exfoliation syndrome (XFS) is the most common known risk factor for secondary glaucoma and a major cause of blindness worldwide. Variants in two genes, LOXL1 and CACNA1A, have previously been associated with XFS. To further elucidate the genetic basis of XFS, we collected a global sample of XFS cases to refine the association at LOXL1, which previously showed inconsistent results across populations, and to identify new variants associated with XFS. We identified a rare protective allele at LOXL1 (p.Phe407, odds ratio (OR) = 25, P = 2.9 × 10-14) through deep resequencing of XFS cases and controls from nine countries. A genome-wide association study (GWAS) of XFS cases and controls from 24 countries followed by replication in 18 countries identified seven genome-wide significant loci (P < 5 × 10-8). We identified association signals at 13q12 (POMP), 11q23.3 (TMEM136), 6p21 (AGPAT1), 3p24 (RBMS3) and 5q23 (near SEMA6A). These findings provide biological insights into the pathology of XFS and highlight a potential role for naturally occurring rare LOXL1 variants in disease biology.

Published
2017

4. Genetic association study of exfoliation syndrome identifies a protective rare variant at LOXL1 and five new susceptibility loci.

Author

Aung, Tin, Aung, Tin, Ozaki, Mineo, Lee, Mei, Schlötzer-Schrehardt, Ursula, Thorleifsson, Gudmar, Mizoguchi, Takanori, Igo, Robert, Haripriya, Aravind, Williams, Susan, Astakhov, Yury, Orr, Andrew, Burdon, Kathryn, Nakano, Satoko, Mori, Kazuhiko, Abu-Amero, Khaled, Hauser, Michael, Li, Zheng, Prakadeeswari, Gopalakrishnan, Bailey, Jessica, Cherecheanu, Alina, Kang, Jae, Nelson, Sarah, Hayashi, Ken, Manabe, Shin-Ichi, Kazama, Shigeyasu, Zarnowski, Tomasz, Inoue, Kenji, Irkec, Murat, Coca-Prados, Miguel, Sugiyama, Kazuhisa, Järvelä, Irma, Schlottmann, Patricio, Lerner, S, Lamari, Hasnaa, Nilgün, Yildirim, Bikbov, Mukharram, Park, Ki, Cha, Soon, Yamashiro, Kenji, Zenteno, Juan, Jonas, Jost, Kumar, Rajesh, Perera, Shamira, Chan, Anita, Kobakhidze, Nino, George, Ronnie, Vijaya, Lingam, Do, Tan, Edward, Deepak, de Juan Marcos, Lourdes, Pakravan, Mohammad, Moghimi, Sasan, Ideta, Ryuichi, Bach-Holm, Daniella, Kappelgaard, Per, Wirostko, Barbara, Thomas, Samuel, Gaston, Daniel, Bedard, Karen, Greer, Wenda, Yang, Zhenglin, Chen, Xueyi, Huang, Lulin, Sang, Jinghong, Jia, Hongyan, Jia, Liyun, Qiao, Chunyan, Zhang, Hui, Liu, Xuyang, Zhao, Bowen, Wang, Ya-Xing, Xu, Liang, Leruez, Stéphanie, Reynier, Pascal, Chichua, George, Tabagari, Sergo, Uebe, Steffen, Zenkel, Matthias, Berner, Daniel, Mossböck, Georg, Weisschuh, Nicole, Hoja, Ursula, Welge-Luessen, Ulrich-Christoph, Mardin, Christian, Founti, Panayiota, Chatzikyriakidou, Anthi, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Ghosh, Arkasubhra, Shetty, Rohit, Porporato, Natalia, Saravanan, Vijayan, Venkatesh, Rengaraj, Shivkumar, Chandrashekaran, Kalpana, Narendran, Sarangapani, Sripriya, Kanavi, Mozhgan, Beni, Afsaneh, Yazdani, Shahin, Aung, Tin, Aung, Tin, Ozaki, Mineo, Lee, Mei, Schlötzer-Schrehardt, Ursula, Thorleifsson, Gudmar, Mizoguchi, Takanori, Igo, Robert, Haripriya, Aravind, Williams, Susan, Astakhov, Yury, Orr, Andrew, Burdon, Kathryn, Nakano, Satoko, Mori, Kazuhiko, Abu-Amero, Khaled, Hauser, Michael, Li, Zheng, Prakadeeswari, Gopalakrishnan, Bailey, Jessica, Cherecheanu, Alina, Kang, Jae, Nelson, Sarah, Hayashi, Ken, Manabe, Shin-Ichi, Kazama, Shigeyasu, Zarnowski, Tomasz, Inoue, Kenji, Irkec, Murat, Coca-Prados, Miguel, Sugiyama, Kazuhisa, Järvelä, Irma, Schlottmann, Patricio, Lerner, S, Lamari, Hasnaa, Nilgün, Yildirim, Bikbov, Mukharram, Park, Ki, Cha, Soon, Yamashiro, Kenji, Zenteno, Juan, Jonas, Jost, Kumar, Rajesh, Perera, Shamira, Chan, Anita, Kobakhidze, Nino, George, Ronnie, Vijaya, Lingam, Do, Tan, Edward, Deepak, de Juan Marcos, Lourdes, Pakravan, Mohammad, Moghimi, Sasan, Ideta, Ryuichi, Bach-Holm, Daniella, Kappelgaard, Per, Wirostko, Barbara, Thomas, Samuel, Gaston, Daniel, Bedard, Karen, Greer, Wenda, Yang, Zhenglin, Chen, Xueyi, Huang, Lulin, Sang, Jinghong, Jia, Hongyan, Jia, Liyun, Qiao, Chunyan, Zhang, Hui, Liu, Xuyang, Zhao, Bowen, Wang, Ya-Xing, Xu, Liang, Leruez, Stéphanie, Reynier, Pascal, Chichua, George, Tabagari, Sergo, Uebe, Steffen, Zenkel, Matthias, Berner, Daniel, Mossböck, Georg, Weisschuh, Nicole, Hoja, Ursula, Welge-Luessen, Ulrich-Christoph, Mardin, Christian, Founti, Panayiota, Chatzikyriakidou, Anthi, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Ghosh, Arkasubhra, Shetty, Rohit, Porporato, Natalia, Saravanan, Vijayan, Venkatesh, Rengaraj, Shivkumar, Chandrashekaran, Kalpana, Narendran, Sarangapani, Sripriya, Kanavi, Mozhgan, Beni, Afsaneh, and Yazdani, Shahin

Abstract

Exfoliation syndrome (XFS) is the most common known risk factor for secondary glaucoma and a major cause of blindness worldwide. Variants in two genes, LOXL1 and CACNA1A, have previously been associated with XFS. To further elucidate the genetic basis of XFS, we collected a global sample of XFS cases to refine the association at LOXL1, which previously showed inconsistent results across populations, and to identify new variants associated with XFS. We identified a rare protective allele at LOXL1 (p.Phe407, odds ratio (OR) = 25, P = 2.9 × 10-14) through deep resequencing of XFS cases and controls from nine countries. A genome-wide association study (GWAS) of XFS cases and controls from 24 countries followed by replication in 18 countries identified seven genome-wide significant loci (P < 5 × 10-8). We identified association signals at 13q12 (POMP), 11q23.3 (TMEM136), 6p21 (AGPAT1), 3p24 (RBMS3) and 5q23 (near SEMA6A). These findings provide biological insights into the pathology of XFS and highlight a potential role for naturally occurring rare LOXL1 variants in disease biology.

Published
2017

5. Genetic association study of exfoliation syndrome identifies a protective rare variant at LOXL1 and five new susceptibility loci

Author

Aung, Tin, Ozaki, Mineo, Lee, Mei Chin, Schlotzer-Schrehardt, Ursula, Thorleifsson, Gudmar, Mizoguchi, Takanori, Igo, Robert P., Jr., Haripriya, Aravind, Williams, Susan E., Astakhov, Yury S., Orr, Andrew C., Burdon, Kathryn P., Nakano, Satoko, Mori, Kazuhiko, Abu-Amero, Khaled, Hauser, Michael, Li, Zheng, Prakadeeswari, Gopalakrishnan, Bailey, Jessica N. Cooke, Cherecheanu, Alina Popa, Kang, Jae H., Nelson, Sarah, Hayashi, Ken, Manabe, Shin-ichi, Kazama, Shigeyasu, Zarnowski, Tomasz, Inoue, Kenji, Irkec, Murat, Coca-Prados, Miguel, Sugiyama, Kazuhisa, Jarvela, Irma, Schlottmann, Patricio, Lerner, S. Fabian, Lamari, Hasnaa, Nilgun, Yildirim, Bikbov, Mukharram, Park, Ki Ho, Cha, Soon Cheol, Yamashiro, Kenji, Zenteno, Juan C., Jonas, Jost B., Kumar, Rajesh S., Perera, Shamira A., Chan, Anita S. Y., Kobakhidze, Nino, George, Ronnie, Vijaya, Lingam, Do, Tan, Edward, Deepak P., de Juan Marcos, Lourdes, Pakravan, Mohammad, Moghimi, Sasan, Ideta, Ryuichi, Bach-Holm, Daniella, Kappelgaard, Per, Wirostko, Barbara, Thomas, Samuel, Gaston, Daniel, Bedard, Karen, Greer, Wenda L., Yang, Zhenglin, Chen, Xueyi, Huang, Lulin, Sang, Jinghong, Jia, Hongyan, Jia, Liyun, Qiao, Chunyan, Zhang, Hui, Liu, Xuyang, Zhao, Bowen, Wang, Ya-Xing, Xu, Liang, Leruez, Stephanie, Reynier, Pascal, Chichua, George, Tabagari, Sergo, Uebe, Steffen, Zenkel, Matthias, Berner, Daniel, Mossboeck, Georg, Weisschuh, Nicole, Hoja, Ursula, Welge-Luessen, Ulrich-Christoph, Mardin, Christian, Founti, Panayiota, Chatzikyriakidou, Anthi, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Ghosh, Arkasubhra, Shetty, Rohit, Porporato, Natalia, Saravanan, Vijayan, Venkatesh, Rengaraj, Shivkumar, Chandrashekaran, Kalpana, Narendran, Sarangapani, Sripriya, Kanavi, Mozhgan R., Beni, Afsaneh Naderi, Yazdani, Shahin, Lashay, Alireza, Naderifar, Homa, Khatibi, Nassim, Fea, Antonio, Lavia, Carlo, Dallorto, Laura, Rolle, Teresa, Frezzotti, Paolo, Paoli, Daniela, Salvi, Erika, Manunta, Paolo, Mori, Yosai, Miyata, Kazunori, Higashide, Tomomi, Chihara, Etsuo, Ishiko, Satoshi, Yoshida, Akitoshi, Yanagi, Masahide, Kiuchi, Yoshiaki, Ohashi, Tsutomu, Sakurai, Toshiya, Sugimoto, Takako, Chuman, Hideki, Aihara, Makoto, Inatani, Masaru, Miyake, Masahiro, Gotoh, Norimoto, Matsuda, Fumihiko, Yoshimura, Nagahisa, Ikeda, Yoko, Ueno, Morio, Sotozono, Chie, Jeoung, Jin Wook, Sagong, Min, Park, Kyu Hyung, Ahn, Jeeyun, Cruz-Aguilar, Marisa, Ezzouhairi, Sidi M., Rafei, Abderrahman, Chong, Yaan Fun, Ng, Xiao Yu, Goh, Shuang Ru, Chen, Yueming, Yong, Victor H. K., Khan, Muhammad Imran, Olawoye, Olusola O., Ashaye, Adeyinka O., Ugbede, Idakwo, Onakoya, Adeola, Kizor-Akaraiwe, Nkiru, Teekhasaenee, Chaiwat, Suwan, Yanin, Supakontanasan, Wasu, Okeke, Suhanya, Uche, Nkechi J., Asimadu, Ifeoma, Ayub, Humaira, Akhtar, Farah, Kosior-Jarecka, Ewa, Lukasik, Urszula, Lischinsky, Ignacio, Castro, Vania, Perez Grossmann, Rodolfo, Megevand, Gordana Sunaric, Roy, Sylvain, Dervan, Edward, Silke, Eoin, Rao, Aparna, Sahay, Priti, Fornero, Pablo, Cuello, Osvaldo, Sivori, Delia, Zompa, Tamara, Mills, Richard A., Souzeau, Emmanuelle, Mitchell, Paul, Wang, Jie Jin, Hewitt, Alex W., Coote, Michael, Crowston, Jonathan G., Astakhov, Sergei Y., Akopov, Eugeny L., Emelyanov, Anton, Vysochinskaya, Vera, Kazakbaeva, Gyulli, Fayzrakhmanov, Rinat, Al-Obeidan, Saleh A., Owaidhah, Ohoud, Aljasim, Leyla Ali, Chowbay, Balram, Foo, Jia Nee, Soh, Raphael Q., Sim, Kar Seng, Xie, Zhicheng, Cheong, Augustine W. O., Mok, Shi Qi, Soo, Hui Meng, Chen, Xiao Yin, Peh, Su Qin, Heng, Khai Koon, Husain, Rahat, Ho, Su-Ling, Hillmer, Axel M., Cheng, Ching-Yu, Escudero-Dominguez, Francisco A., Gonzalez-Sarmiento, Rogelio, Martinon-Torres, Frederico, Salas, Antonio, Pathanapitoon, Kessara, Hansapinyo, Linda, Wanichwecharugruang, Boonsong, Kitnarong, Naris, Sakuntabhai, Anavaj, Nguyn, Hip X., Nguyn, Giang T. T., Nguyn, TrNh V., Zenz, Werner, Binder, Alexander, Klobassa, Daniela S., Hibberd, Martin L., Davila, Sonia, Herms, Stefan, Nothen, Markus M., Moebus, Susanne, Rautenbach, Robyn M., Ziskind, Ari, Carmichael, Trevor R., Ramsay, Michele, Alvarez, Lydia, Garcia, Montserrat, Gonzalez-Iglesias, Hector, Rodriguez-Calvo, Pedro P., Fernandez-Vega Cueto, Luis, Oguz, Cilingir, Tamcelik, Nevbahar, Atalay, Eray, Batu, Bilge, Aktas, Dilek, Kasim, Burcu, Wilson, M. Roy, Coleman, Anne L., Liu, Yutao, Challa, Pratap, Herndon, Leon, Kuchtey, Rachel W., Kuchtey, John, Curtin, Karen, Chaya, Craig J., Crandall, Alan, Zangwill, Linda M., Wong, Tien Yin, Nakano, Masakazu, Kinoshita, Shigeru, den Hollander, Anneke I., Vesti, Eija, Fingert, John H., Lee, Richard K., Sit, Arthur J., Shingleton, Bradford J., Wang, Ningli, Cusi, Daniele, Qamar, Raheel, Kraft, Peter, Pericak-Vance, Margaret A., Raychaudhuri, Soumya, Heegaard, Steffen, Kivela, Tero, Reis, Andre, Kruse, Friedrich E., Weinreb, Robert N., Pasquale, Louis R., Haines, Jonathan L., Thorsteinsdottir, Unnur, Jonasson, Fridbert, Allingham, R. Rand, Milea, Dan, Ritch, Robert, Kubota, Toshiaki, Tashiro, Kei, Vithana, Eranga N., Micheal, Shazia, Topouzis, Fotis, Craig, Jamie E., Dubina, Michael, Sundaresan, Periasamy, Stefansson, Kari, Wiggs, Janey L., Pasutto, Francesca, Khor, Chiea Chuen, Aung, Tin, Ozaki, Mineo, Lee, Mei Chin, Schlotzer-Schrehardt, Ursula, Thorleifsson, Gudmar, Mizoguchi, Takanori, Igo, Robert P., Jr., Haripriya, Aravind, Williams, Susan E., Astakhov, Yury S., Orr, Andrew C., Burdon, Kathryn P., Nakano, Satoko, Mori, Kazuhiko, Abu-Amero, Khaled, Hauser, Michael, Li, Zheng, Prakadeeswari, Gopalakrishnan, Bailey, Jessica N. Cooke, Cherecheanu, Alina Popa, Kang, Jae H., Nelson, Sarah, Hayashi, Ken, Manabe, Shin-ichi, Kazama, Shigeyasu, Zarnowski, Tomasz, Inoue, Kenji, Irkec, Murat, Coca-Prados, Miguel, Sugiyama, Kazuhisa, Jarvela, Irma, Schlottmann, Patricio, Lerner, S. Fabian, Lamari, Hasnaa, Nilgun, Yildirim, Bikbov, Mukharram, Park, Ki Ho, Cha, Soon Cheol, Yamashiro, Kenji, Zenteno, Juan C., Jonas, Jost B., Kumar, Rajesh S., Perera, Shamira A., Chan, Anita S. Y., Kobakhidze, Nino, George, Ronnie, Vijaya, Lingam, Do, Tan, Edward, Deepak P., de Juan Marcos, Lourdes, Pakravan, Mohammad, Moghimi, Sasan, Ideta, Ryuichi, Bach-Holm, Daniella, Kappelgaard, Per, Wirostko, Barbara, Thomas, Samuel, Gaston, Daniel, Bedard, Karen, Greer, Wenda L., Yang, Zhenglin, Chen, Xueyi, Huang, Lulin, Sang, Jinghong, Jia, Hongyan, Jia, Liyun, Qiao, Chunyan, Zhang, Hui, Liu, Xuyang, Zhao, Bowen, Wang, Ya-Xing, Xu, Liang, Leruez, Stephanie, Reynier, Pascal, Chichua, George, Tabagari, Sergo, Uebe, Steffen, Zenkel, Matthias, Berner, Daniel, Mossboeck, Georg, Weisschuh, Nicole, Hoja, Ursula, Welge-Luessen, Ulrich-Christoph, Mardin, Christian, Founti, Panayiota, Chatzikyriakidou, Anthi, Pappas, Theofanis, Anastasopoulos, Eleftherios, Lambropoulos, Alexandros, Ghosh, Arkasubhra, Shetty, Rohit, Porporato, Natalia, Saravanan, Vijayan, Venkatesh, Rengaraj, Shivkumar, Chandrashekaran, Kalpana, Narendran, Sarangapani, Sripriya, Kanavi, Mozhgan R., Beni, Afsaneh Naderi, Yazdani, Shahin, Lashay, Alireza, Naderifar, Homa, Khatibi, Nassim, Fea, Antonio, Lavia, Carlo, Dallorto, Laura, Rolle, Teresa, Frezzotti, Paolo, Paoli, Daniela, Salvi, Erika, Manunta, Paolo, Mori, Yosai, Miyata, Kazunori, Higashide, Tomomi, Chihara, Etsuo, Ishiko, Satoshi, Yoshida, Akitoshi, Yanagi, Masahide, Kiuchi, Yoshiaki, Ohashi, Tsutomu, Sakurai, Toshiya, Sugimoto, Takako, Chuman, Hideki, Aihara, Makoto, Inatani, Masaru, Miyake, Masahiro, Gotoh, Norimoto, Matsuda, Fumihiko, Yoshimura, Nagahisa, Ikeda, Yoko, Ueno, Morio, Sotozono, Chie, Jeoung, Jin Wook, Sagong, Min, Park, Kyu Hyung, Ahn, Jeeyun, Cruz-Aguilar, Marisa, Ezzouhairi, Sidi M., Rafei, Abderrahman, Chong, Yaan Fun, Ng, Xiao Yu, Goh, Shuang Ru, Chen, Yueming, Yong, Victor H. K., Khan, Muhammad Imran, Olawoye, Olusola O., Ashaye, Adeyinka O., Ugbede, Idakwo, Onakoya, Adeola, Kizor-Akaraiwe, Nkiru, Teekhasaenee, Chaiwat, Suwan, Yanin, Supakontanasan, Wasu, Okeke, Suhanya, Uche, Nkechi J., Asimadu, Ifeoma, Ayub, Humaira, Akhtar, Farah, Kosior-Jarecka, Ewa, Lukasik, Urszula, Lischinsky, Ignacio, Castro, Vania, Perez Grossmann, Rodolfo, Megevand, Gordana Sunaric, Roy, Sylvain, Dervan, Edward, Silke, Eoin, Rao, Aparna, Sahay, Priti, Fornero, Pablo, Cuello, Osvaldo, Sivori, Delia, Zompa, Tamara, Mills, Richard A., Souzeau, Emmanuelle, Mitchell, Paul, Wang, Jie Jin, Hewitt, Alex W., Coote, Michael, Crowston, Jonathan G., Astakhov, Sergei Y., Akopov, Eugeny L., Emelyanov, Anton, Vysochinskaya, Vera, Kazakbaeva, Gyulli, Fayzrakhmanov, Rinat, Al-Obeidan, Saleh A., Owaidhah, Ohoud, Aljasim, Leyla Ali, Chowbay, Balram, Foo, Jia Nee, Soh, Raphael Q., Sim, Kar Seng, Xie, Zhicheng, Cheong, Augustine W. O., Mok, Shi Qi, Soo, Hui Meng, Chen, Xiao Yin, Peh, Su Qin, Heng, Khai Koon, Husain, Rahat, Ho, Su-Ling, Hillmer, Axel M., Cheng, Ching-Yu, Escudero-Dominguez, Francisco A., Gonzalez-Sarmiento, Rogelio, Martinon-Torres, Frederico, Salas, Antonio, Pathanapitoon, Kessara, Hansapinyo, Linda, Wanichwecharugruang, Boonsong, Kitnarong, Naris, Sakuntabhai, Anavaj, Nguyn, Hip X., Nguyn, Giang T. T., Nguyn, TrNh V., Zenz, Werner, Binder, Alexander, Klobassa, Daniela S., Hibberd, Martin L., Davila, Sonia, Herms, Stefan, Nothen, Markus M., Moebus, Susanne, Rautenbach, Robyn M., Ziskind, Ari, Carmichael, Trevor R., Ramsay, Michele, Alvarez, Lydia, Garcia, Montserrat, Gonzalez-Iglesias, Hector, Rodriguez-Calvo, Pedro P., Fernandez-Vega Cueto, Luis, Oguz, Cilingir, Tamcelik, Nevbahar, Atalay, Eray, Batu, Bilge, Aktas, Dilek, Kasim, Burcu, Wilson, M. Roy, Coleman, Anne L., Liu, Yutao, Challa, Pratap, Herndon, Leon, Kuchtey, Rachel W., Kuchtey, John, Curtin, Karen, Chaya, Craig J., Crandall, Alan, Zangwill, Linda M., Wong, Tien Yin, Nakano, Masakazu, Kinoshita, Shigeru, den Hollander, Anneke I., Vesti, Eija, Fingert, John H., Lee, Richard K., Sit, Arthur J., Shingleton, Bradford J., Wang, Ningli, Cusi, Daniele, Qamar, Raheel, Kraft, Peter, Pericak-Vance, Margaret A., Raychaudhuri, Soumya, Heegaard, Steffen, Kivela, Tero, Reis, Andre, Kruse, Friedrich E., Weinreb, Robert N., Pasquale, Louis R., Haines, Jonathan L., Thorsteinsdottir, Unnur, Jonasson, Fridbert, Allingham, R. Rand, Milea, Dan, Ritch, Robert, Kubota, Toshiaki, Tashiro, Kei, Vithana, Eranga N., Micheal, Shazia, Topouzis, Fotis, Craig, Jamie E., Dubina, Michael, Sundaresan, Periasamy, Stefansson, Kari, Wiggs, Janey L., Pasutto, Francesca, and Khor, Chiea Chuen

Abstract

Exfoliation syndrome (XFS) is the most common known risk factor for secondary glaucoma and a major cause of blindness worldwide. Variants in two genes, LOXL1 and CACNA1A, have previously been associated with XFS. To further elucidate the genetic basis of XFS, we collected a global sample of XFS cases to refine the association at LOXL1, which previously showed inconsistent results across populations, and to identify new variants associated with XFS. We identified a rare protective allele at LOXL1 (p.Phe407, odds ratio (OR) = 25, P = 2.9 × 10−14) through deep resequencing of XFS cases and controls from nine countries. A genome-wide association study (GWAS) of XFS cases and controls from 24 countries followed by replication in 18 countries identified seven genome-wide significant loci (P < 5 × 10−8). We identified association signals at 13q12 (POMP), 11q23.3 (TMEM136), 6p21 (AGPAT1), 3p24 (RBMS3) and 5q23 (near SEMA6A). These findings provide biological insights into the pathology of XFS and highlight a potential role for naturally occurring rare LOXL1 variants in disease biology.

Published
2017

6. Evolution of the Cytosolic Iron/Sulfur cluster Assembly machinery in Blastocystis sp. and other microbial eukaryotes

Author

Tsaousis, Anastasios D., Gentekaki, Eleni, Eme, Laura, Gaston, Daniel, Roger, Andrew J., Tsaousis, Anastasios D., Gentekaki, Eleni, Eme, Laura, Gaston, Daniel, and Roger, Andrew J.

Abstract

The Cytosolic Iron/Sulfur cluster Assembly (CIA) machinery is responsible for the assembly of cytosolic and nuclear iron/sulfur clusters, cofactors that are vital for all living cells. This machinery is uniquely found in eukaryotes and consists of at least eight proteins in opisthokont lineages such as animals and yeast. We sought to identify and characterize homologues of the CIA system proteins in the anaerobic stramenopile parasite Blastocystis sp. NandII strain. We identified transcripts encoding six of the components - Cia1, Cia2, MMS19, Nbp35, Nar1, and a putative Tah18 - and showed that the last three of them localized to the cytoplasm of the cell using immuno-fluorescence microscopy, immuno-electron microscopy and subcellular fractionation. We then used comparative genomic and phylogenetic approaches to investigate the evolutionary history of these proteins. While most Blastocystis homologues branch with their eukaryotic counterparts, the putative Blastocystis Tah18 seems to have a separate evolutionary origin and therefore possibly a different function. Furthermore, our phylogenomic analyses revealed that all eight CIA components described in opisthokonts originated before the diversification of extant eukaryotic lineages and were likely already present in the Last Eukaryotic Common Ancestor (LECA). Nbp35, Nar1 Cia1 and Cia2 proteins have been conserved during the subsequent evolutionary diversification of eukaryotes and are present in virtually all extant lineages, whereas the other CIA proteins have patchy phylogenetic distributions. Cia2 appears to be homologous to SufT, a component of the prokaryotic SUF system, making this the first reported evolutionary link between the CIA and any other Fe/S biogenesis pathway. All of our results suggest that the CIA machinery is an ubiquitous biosynthetic pathway in eukaryotes, but its apparent plasticity in composition raises questions regarding how it functions in non-model organisms and how it interfaces with var

Published
2014

7. Evolution of the Cytosolic Iron/Sulfur cluster Assembly machinery in Blastocystis sp. and other microbial eukaryotes

Author

Tsaousis, Anastasios D., Gentekaki, Eleni, Eme, Laura, Gaston, Daniel, Roger, Andrew J., Tsaousis, Anastasios D., Gentekaki, Eleni, Eme, Laura, Gaston, Daniel, and Roger, Andrew J.

Abstract

The Cytosolic Iron/Sulfur cluster Assembly (CIA) machinery is responsible for the assembly of cytosolic and nuclear iron/sulfur clusters, cofactors that are vital for all living cells. This machinery is uniquely found in eukaryotes and consists of at least eight proteins in opisthokont lineages such as animals and yeast. We sought to identify and characterize homologues of the CIA system proteins in the anaerobic stramenopile parasite Blastocystis sp. NandII strain. We identified transcripts encoding six of the components - Cia1, Cia2, MMS19, Nbp35, Nar1, and a putative Tah18 - and showed that the last three of them localized to the cytoplasm of the cell using immuno-fluorescence microscopy, immuno-electron microscopy and subcellular fractionation. We then used comparative genomic and phylogenetic approaches to investigate the evolutionary history of these proteins. While most Blastocystis homologues branch with their eukaryotic counterparts, the putative Blastocystis Tah18 seems to have a separate evolutionary origin and therefore possibly a different function. Furthermore, our phylogenomic analyses revealed that all eight CIA components described in opisthokonts originated before the diversification of extant eukaryotic lineages and were likely already present in the Last Eukaryotic Common Ancestor (LECA). Nbp35, Nar1 Cia1 and Cia2 proteins have been conserved during the subsequent evolutionary diversification of eukaryotes and are present in virtually all extant lineages, whereas the other CIA proteins have patchy phylogenetic distributions. Cia2 appears to be homologous to SufT, a component of the prokaryotic SUF system, making this the first reported evolutionary link between the CIA and any other Fe/S biogenesis pathway. All of our results suggest that the CIA machinery is an ubiquitous biosynthetic pathway in eukaryotes, but its apparent plasticity in composition raises questions regarding how it functions in non-model organisms and how it interfaces with var

Published
2014

8. Evolution of the Cytosolic Iron/Sulfur cluster Assembly machinery in Blastocystis sp. and other microbial eukaryotes

Author

Tsaousis, Anastasios D., Gentekaki, Eleni, Eme, Laura, Gaston, Daniel, Roger, Andrew J., Tsaousis, Anastasios D., Gentekaki, Eleni, Eme, Laura, Gaston, Daniel, and Roger, Andrew J.

Abstract

The Cytosolic Iron/Sulfur cluster Assembly (CIA) machinery is responsible for the assembly of cytosolic and nuclear iron/sulfur clusters, cofactors that are vital for all living cells. This machinery is uniquely found in eukaryotes and consists of at least eight proteins in opisthokont lineages such as animals and yeast. We sought to identify and characterize homologues of the CIA system proteins in the anaerobic stramenopile parasite Blastocystis sp. NandII strain. We identified transcripts encoding six of the components - Cia1, Cia2, MMS19, Nbp35, Nar1, and a putative Tah18 - and showed that the last three of them localized to the cytoplasm of the cell using immuno-fluorescence microscopy, immuno-electron microscopy and subcellular fractionation. We then used comparative genomic and phylogenetic approaches to investigate the evolutionary history of these proteins. While most Blastocystis homologues branch with their eukaryotic counterparts, the putative Blastocystis Tah18 seems to have a separate evolutionary origin and therefore possibly a different function. Furthermore, our phylogenomic analyses revealed that all eight CIA components described in opisthokonts originated before the diversification of extant eukaryotic lineages and were likely already present in the Last Eukaryotic Common Ancestor (LECA). Nbp35, Nar1 Cia1 and Cia2 proteins have been conserved during the subsequent evolutionary diversification of eukaryotes and are present in virtually all extant lineages, whereas the other CIA proteins have patchy phylogenetic distributions. Cia2 appears to be homologous to SufT, a component of the prokaryotic SUF system, making this the first reported evolutionary link between the CIA and any other Fe/S biogenesis pathway. All of our results suggest that the CIA machinery is an ubiquitous biosynthetic pathway in eukaryotes, but its apparent plasticity in composition raises questions regarding how it functions in non-model organisms and how it interfaces with var

Published
2014

9. Evolution of Fe/S cluster biogenesis in the anaerobic parasite Blastocystis

Author

Tsaousis, Anastasios D., Ollagnier de Choudens, Sandrine, Gentekaki, Eleni, Long, Shaojun, Gaston, Daniel, Stechmann, Alexandra, Vinella, Daniel, Py, Beatrice, Fontecave, Marc, Barras, Frederic, Lukeš, Julius, Roger, Andrew J., Tsaousis, Anastasios D., Ollagnier de Choudens, Sandrine, Gentekaki, Eleni, Long, Shaojun, Gaston, Daniel, Stechmann, Alexandra, Vinella, Daniel, Py, Beatrice, Fontecave, Marc, Barras, Frederic, Lukeš, Julius, and Roger, Andrew J.

Abstract

Iron/sulfur cluster (ISC)-containing proteins are essential components of cells. In most eukaryotes, Fe/S clusters are synthesized by the mitochondrial ISC machinery, the cytosolic iron/sulfur assembly system, and, in photosynthetic species, a plastid sulfur-mobilization (SUF) system. Here we show that the anaerobic human protozoan parasite Blastocystis, in addition to possessing ISC and iron/sulfur assembly systems, expresses a fused version of the SufC and SufB proteins of prokaryotes that it has acquired by lateral transfer from an archaeon related to the Methanomicrobiales, an important lineage represented in the human gastrointestinal tract microbiome. Although components of the Blastocystis ISC system function within its anaerobic mitochondrion-related organelles and can functionally replace homologues in Trypanosoma brucei, its SufCB protein has similar biochemical properties to its prokaryotic homologues, functions within the parasite's cytosol, and is up-regulated under oxygen stress. Blastocystis is unique among eukaryotic pathogens in having adapted to its parasitic lifestyle by acquiring a SUF system from nonpathogenic Archaea to synthesize Fe/S clusters under oxygen stress.

Published
2012

10. A Functional Tom70 in the Human Parasite Blastocystis sp.: Implications for the Evolution of the Mitochondrial Import Apparatus

Author

Tsaousis, Anastasios D., Gaston, Daniel, Stechmann, Alexandra, Walker, Peter B., Lithgow, Trevor, Roger, Andrew J., Tsaousis, Anastasios D., Gaston, Daniel, Stechmann, Alexandra, Walker, Peter B., Lithgow, Trevor, and Roger, Andrew J.

Abstract

Core proteins of mitochondrial protein import are found in all mitochondria, suggesting a common origin of this import machinery. Despite the presence of a universal core import mechanism, there are specific proteins found only in a few groups of organisms. One of these proteins is the translocase of outer membrane 70 (Tom70), a protein that is essential for the import of preproteins with internal targeting sequences into the mitochondrion. Until now, Tom70 has only been found in animals and Fungi. We have identified a tom70 gene in the human parasitic anaerobic stramenopile Blastocystis sp. that is neither an animal nor a fungus. Using a combination of bioinformatics, genetic complementation, and immunofluorescence microscopy analyses, we demonstrate that this protein functions as a typical Tom70 in Blastocystis mitochondrion-related organelles. Additionally, we identified putative tom70 genes in the genomes of other stramenopiles and a haptophyte, that, in phylogenies, form a monophyletic group distinct from the animal and the fungal homologues. The presence of Tom70 in these lineages significantly expands the evolutionary spectrum of eukaryotes that contain this protein and suggests that it may have been part of the core mitochondrial protein import apparatus of the last common ancestral eukaryote.

Published
2011

11. Chapter 2 Predicting Proteomes of Mitochondria and Related Organelles from Genomic and Expressed Sequence Tag Data

Author

Gaston, Daniel, Tsaousis, Anastasios D., Roger, Andrew J., Gaston, Daniel, Tsaousis, Anastasios D., and Roger, Andrew J.

Abstract

In eukaryotes, determination of the subcellular location of a novel protein encoded in genomic or transcriptomic data provides useful clues as to its possible function. However, experimental localization studies are expensive and time-consuming. As a result, accurate in silico prediction of subcellular localization from sequence data alone is an extremely important field of study in bioinformatics. This is especially so as genomic studies expand beyond model system organisms to encompass the full diversity of eukaryotes. Here we review some of the more commonly used programs for prediction of proteins that function in mitochondria, or mitochondrion-related organelles in diverse eukaryotic lineages and provide recommendations on how to apply these methods. Furthermore, we compare the predictive performance of these programs on a mixed set of mitochondrial and non-mitochondrial proteins. Although N-terminal targeting peptide prediction programs tend to have the highest accuracy, they cannot be effectively used for partial coding sequences derived from high-throughput expressed sequence tag surveys where data for the N-terminus of the encoded protein is often missing. Therefore methods that do not rely on the presence of an N-terminal targeting sequence alone are extremely useful, especially for expressed sequence tag data. The best strategy for classification of unknown proteins is to use multiple programs, incorporating a variety of prediction strategies, and closely examine the predictions with an understanding of how each of those programs will likely handle the data.

Published
2009

Catalog

Books, media, physical & digital resources
See catalog results