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pkn22 (alr2502) encoding a putative Ser/Thr kinase in the cyanobacterium Anabaena sp PCC 7120 is induced by both iron starvation and oxidative stress and regulates the expression of isiA
Xu, WL; Jeanjean, R; Liu, YD; Zhang, CC; Zhang, CC, CNRS, IBSM, Chim Bacterienne Lab, 31 Chemin Joseph Aiguier, F-13402 Marseille 20, France
2003
Source PublicationFEBS LETTERS
Volume553Issue:1-2Pages:179-182
AbstractIn cyanobacteria, the isiA gene is required for cell adaptation to oxidative damage caused by the absence of iron. We show here that a putative Ser/Thr kinase gene, pkn22 (alr2052), is activated by iron deficiency and oxidative damage in Anabaena sp. PCC 7120. A pkn22 insertion mutant is unable to grow when iron is limiting. pkn22 regulates the expression of isiA (encoding CP43') but not of isiB (encoding flavodoxin) and psbC (CP43). Fluorescence measurement at 77 K reveals the absence of the typical signature of CP43' associated with photosystem I in the mutant under iron-limiting conditions. We propose that Pkn22 is required for the function of isiA/CP43' and constitutes a regulatory element necessary for stress response. (C) 2003 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
KeywordSignal Transduction Iron Photosynthesis Protein Phosphorylation
DepartmentCNRS, IBSM, Chim Bacterienne Lab, F-13402 Marseille 20, France; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China; Huazhong Agr Univ, Key Lab Agromicrobiol, Wuhan 430070, Hubei, Peoples R China
Subject AreaBiochemistry & Molecular Biology ; Biophysics ; Cell Biology
Indexed BySCI
WOS IDWOS:000185877600034
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9634
Collection期刊论文
Corresponding AuthorZhang, CC, CNRS, IBSM, Chim Bacterienne Lab, 31 Chemin Joseph Aiguier, F-13402 Marseille 20, France
Recommended Citation
GB/T 7714
Xu, WL,Jeanjean, R,Liu, YD,et al. pkn22 (alr2502) encoding a putative Ser/Thr kinase in the cyanobacterium Anabaena sp PCC 7120 is induced by both iron starvation and oxidative stress and regulates the expression of isiA[J]. FEBS LETTERS,2003,553(1-2):179-182.
APA Xu, WL,Jeanjean, R,Liu, YD,Zhang, CC,&Zhang, CC, CNRS, IBSM, Chim Bacterienne Lab, 31 Chemin Joseph Aiguier, F-13402 Marseille 20, France.(2003).pkn22 (alr2502) encoding a putative Ser/Thr kinase in the cyanobacterium Anabaena sp PCC 7120 is induced by both iron starvation and oxidative stress and regulates the expression of isiA.FEBS LETTERS,553(1-2),179-182.
MLA Xu, WL,et al."pkn22 (alr2502) encoding a putative Ser/Thr kinase in the cyanobacterium Anabaena sp PCC 7120 is induced by both iron starvation and oxidative stress and regulates the expression of isiA".FEBS LETTERS 553.1-2(2003):179-182.
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