Document Detail

FtsH-mediated repair of the photosystem II complex in response to light stress.
MedLine Citation:
PMID:  15545296     Owner:  NLM     Status:  MEDLINE    
A common feature of light stress in plants, algae, and cyanobacteria is the light-induced damage to the photosystem II complex (PSII), which catalyses the photosynthetic oxidation of water to molecular oxygen. A repair cycle operates to replace damaged subunits within PSII, in particular, the D1 reaction centre polypeptide, by newly synthesized copies. As yet the molecular details of this physiologically important process remain obscure. A key aspect of the process that has attracted much attention is the identity of the protease or proteases involved in D1 degradation. The results are summarized here of recent mutagenesis experiments that were designed to assess the functional importance of the DegP/HtrA and FtsH protease families in the cyanobacterium Synechocystis sp. PCC 6803. Based on these results and the analysis of Arabidopsis mutants, a general model for PSII repair is suggested in which FtsH complexes alone are able to degrade damaged D1.
Peter J Nixon; Myles Barker; Marko Boehm; Remco de Vries; Josef Komenda
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review     Date:  2004-11-15
Journal Detail:
Title:  Journal of experimental botany     Volume:  56     ISSN:  0022-0957     ISO Abbreviation:  J. Exp. Bot.     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2005-01-27     Completed Date:  2005-05-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9882906     Medline TA:  J Exp Bot     Country:  England    
Other Details:
Languages:  eng     Pagination:  357-63     Citation Subset:  IM    
Wolfson Laboratories, Department of Biological Sciences, Imperial College London, S. Kensington campus, London SW7 2AZ, UK.
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MeSH Terms
ATP-Dependent Proteases
Arabidopsis / metabolism
Arabidopsis Proteins
Cyanobacteria / metabolism
Heat-Shock Proteins / physiology
Membrane Proteins / physiology*
Peptide Hydrolases / metabolism
Periplasmic Proteins / physiology
Photosystem II Protein Complex / metabolism*,  radiation effects*
Plant Proteins / genetics,  physiology*
Reactive Oxygen Species
Serine Endopeptidases / physiology
Signal Transduction
Synechocystis / metabolism
Reg. No./Substance:
0/Arabidopsis Proteins; 0/Heat-Shock Proteins; 0/Membrane Proteins; 0/Periplasmic Proteins; 0/Photosystem II Protein Complex; 0/Plant Proteins; 0/Reactive Oxygen Species; EC 3.4.-/Peptide Hydrolases; EC 3.4.21.-/ATP-Dependent Proteases; EC 3.4.21.-/DegP protease; EC 3.4.21.-/Serine Endopeptidases; EC 3.4.21.-/VAR2 protein, Arabidopsis

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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