| Specific degradation of photosystem II D1 protein by a protease （Air3815） in heterocysts of the cyanobacterium Anabaena sp. PCC7120 |
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| 引用本文： | YANG GuoHua,HU Bin,ZHAO JinDong. Specific degradation of photosystem II D1 protein by a protease （Air3815） in heterocysts of the cyanobacterium Anabaena sp. PCC7120[J]. 科学通报(英文版), 2011, 56(11): 1068-1070. DOI: 10.1007/s11434-010-4329-3 |
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| 作者姓名： | YANG GuoHua HU Bin ZHAO JinDong |
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| 作者单位： | [1]State Key Laboratory of Protein and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing 100871, China; [2]Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China |
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| 基金项目： | This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original anthor（s） and source are credited. |
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| 摘 要： | Some filamentous cyanobacteria form heterocysts under conditions lacking combined nitrogen for nitrogen fixation.Photosystem II is removed from heterocyst during the process of cell differentiation.Here,we demonstrate that Alr3815 is a protease that is capable of degrading D1 protein of photosystem II.Strain-322,which lacks alr3815,is impaired in nitrogen fixation in air because some oxygen evolving activity is retained in its heterocysts.Our results also suggest that calcium may play a regulatory role in D1 degradation during heterocyst differentiation.
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| 关 键 词： | cyanobacteria D1 protein degradation heterocysts proteases |
| 收稿时间： | 2011-02-15 |
Specific degradation of photosystem II D1 protein by a protease (Alr3815) in heterocysts of the cyanobacterium Anabaena sp. PCC7120 |
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| GuoHua Yang,Bin Hu,JinDong Zhao. Specific degradation of photosystem II D1 protein by a protease (Alr3815) in heterocysts of the cyanobacterium Anabaena sp. PCC7120[J]. Chinese science bulletin, 2011, 56(11): 1068-1070. DOI: 10.1007/s11434-010-4329-3 |
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| Authors: | GuoHua Yang Bin Hu JinDong Zhao |
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| Affiliation: | Key Laboratory of Protein and Plant Genetic Engineering,College of Life Sciences,Peking University,Beijing 100871,China;2 Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China |
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| Abstract: | Some filamentous cyanobacteria form heterocysts under conditions lacking combined nitrogen for nitrogen fixation. Photosystem II is removed from heterocyst during the process of cell differentiation. Here, we demonstrate that Alr3815 is a protease that is capable of degrading D1 protein of photosystem II. Strain-322, which lacks alr3815, is impaired in nitrogen fixation in air because some oxygen evolving activity is retained in its heterocysts. Our results also suggest that calcium may play a regulatory role in D1 degradation during heterocyst differentiation. |
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| Keywords: | cyanobacteria D1 protein degradation heterocysts proteases |
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