Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition
Cyanobacteria are ancient photosynthetic prokaryotes that have adapted successfully to adverse environments including high-light irradiation. Although it is known that the repair of photodamaged photosystem II (PSII) in the organisms is a highly regulated process, our knowledge of the molecular comp...
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sg-ntu-dr.10356-821502023-02-28T17:00:49Z Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition Yang, Haomeng Liao, Libing Bo, Tingting Zhao, Lei Sun, Xuwu Lu, Xuefeng Norling, Birgitta Huang, Fang School of Biological Sciences Slr0151 Synechocystis Cyanobacteria are ancient photosynthetic prokaryotes that have adapted successfully to adverse environments including high-light irradiation. Although it is known that the repair of photodamaged photosystem II (PSII) in the organisms is a highly regulated process, our knowledge of the molecular components that regulate each step of the process is limited. We have previously identified a hypothetical protein Slr0151 in the membrane fractions of cyanobacterium Synechocystis sp. PCC 6803. Here, we report that Slr0151 is involved in PSII repair of the organism. We generated a mutant strain (Δslr0151) lacking the protein Slr0151 and analyzed its characteristics under normal and high-light conditions. Targeted deletion of slr0151 resulted in decreased PSII activity in Synechocystis. Moreover, the mutant exhibited increased photoinhibition due to impairment of PSII repair under high-light condition. Further analysis using in vivo radioactive labeling and 2-D blue native/sodium dodecylsulfate polyacrylamide gel electrophoresis indicated that the PSII repair cycle was hindered at the levels of D1 synthesis and disassembly and/or assembly of PSII in the mutant. Protein interaction assays demonstrated that Slr0151 interacts with D1 and CP43 proteins. Taken together, these results indicate that Slr0151 plays an important role in regulating PSII repair in the organism under high-light stress condition. Published version 2016-08-15T08:51:05Z 2019-12-06T14:47:37Z 2016-08-15T08:51:05Z 2019-12-06T14:47:37Z 2014 Journal Article Yang, H., Liao, L., Bo, T., Zhao, L., Sun, X., Lu, X., et al. (2014). Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition. Journal of Integrative Plant Biology, 56(12), 1136-1150. 1672-9072 https://hdl.handle.net/10356/82150 http://hdl.handle.net/10220/41133 10.1111/jipb.12275 en Journal of Integrative Plant Biology © 2014 Institute of Botany, Chinese Academy of Sciences. This paper was published in Journal of Integrative Plant Biology and is made available as an electronic reprint (preprint) with permission of Institute of Botany, Chinese Academy of Sciences. The published version is available at: [http://dx.doi.org/10.1111/jipb.12275]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 15 p. application/pdf |
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Slr0151 Synechocystis Yang, Haomeng Liao, Libing Bo, Tingting Zhao, Lei Sun, Xuwu Lu, Xuefeng Norling, Birgitta Huang, Fang Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition |
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Cyanobacteria are ancient photosynthetic prokaryotes that have adapted successfully to adverse environments including high-light irradiation. Although it is known that the repair of photodamaged photosystem II (PSII) in the organisms is a highly regulated process, our knowledge of the molecular components that regulate each step of the process is limited. We have previously identified a hypothetical protein Slr0151 in the membrane fractions of cyanobacterium Synechocystis sp. PCC 6803. Here, we report that Slr0151 is involved in PSII repair of the organism. We generated a mutant strain (Δslr0151) lacking the protein Slr0151 and analyzed its characteristics under normal and high-light conditions. Targeted deletion of slr0151 resulted in decreased PSII activity in Synechocystis. Moreover, the mutant exhibited increased photoinhibition due to impairment of PSII repair under high-light condition. Further analysis using in vivo radioactive labeling and 2-D blue native/sodium dodecylsulfate polyacrylamide gel electrophoresis indicated that the PSII repair cycle was hindered at the levels of D1 synthesis and disassembly and/or assembly of PSII in the mutant. Protein interaction assays demonstrated that Slr0151 interacts with D1 and CP43 proteins. Taken together, these results indicate that Slr0151 plays an important role in regulating PSII repair in the organism under high-light stress condition. |
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School of Biological Sciences |
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School of Biological Sciences Yang, Haomeng Liao, Libing Bo, Tingting Zhao, Lei Sun, Xuwu Lu, Xuefeng Norling, Birgitta Huang, Fang |
format |
Article |
author |
Yang, Haomeng Liao, Libing Bo, Tingting Zhao, Lei Sun, Xuwu Lu, Xuefeng Norling, Birgitta Huang, Fang |
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Yang, Haomeng |
title |
Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition |
title_short |
Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition |
title_full |
Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition |
title_fullStr |
Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition |
title_full_unstemmed |
Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition |
title_sort |
slr0151 in synechocystis sp. pcc 6803 is required for efficient repair of photosystem ii under high-light condition |
publishDate |
2016 |
url |
https://hdl.handle.net/10356/82150 http://hdl.handle.net/10220/41133 |
_version_ |
1759857674786177024 |