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Title: A Conserved Rubredoxin Is Necessary for Photosystem II Accumulation in Diverse Oxygenic Photoautotrophs

Journal Article · · Journal of Biological Chemistry
 [1];  [1];  [2];  [1];  [1];  [1];  [2];  [3];  [2]
  1. Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst. Dept. of Plant and Microbial Biology
  2. Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst. Dept. of Plant and Microbial Biology; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Physical Biosciences Division
  3. Sorbonne Univ., Paris (France). Centre National de la Recherche Scientifique (CNRS). Unite Mixte de Recherche. Inst. de Biologie Physico-Chimique

In oxygenic photosynthesis, two photosystems work in tandem to harvest light energy and generate NADPH and ATP. Photosystem II(PSII),theprotein-pigment complexthatuseslight energyto catalyze the splitting of water, is assembled from its component parts in a tightly regulated process that requires a number of assembly factors. The 2pac mutant of the unicellular green alga Chlamydomonas reinhardtii was isolated and found to have no detectable PSII activity, whereas other components of the photosynthetic electron transport chain, including photosystem I, were stillfunctional.PSII activitywasfully restoredby complementation with the RBD1 gene, which encodes a small iron-sulfur protein known as a rubredoxin. Phylogenetic evidence supports the hypothesisthatthis rubredoxin anditsorthologs areuniquetooxygenic phototrophs and distinct from rubredoxins in Archaea and bacteria (excluding cyanobacteria). Knockouts of the rubredoxin orthologs in the cyanobacterium Synechocystis sp. PCC 6803 and the plant Arabidopsis thaliana were also found to be specifically affected in PSII accumulation. Taken together, our data suggest that this rubredoxin is necessary for normal PSII activity in a diverse set of organisms that perform oxygenic photosynthesis.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division; Gordon and Betty Moore Foundation
Grant/Contract Number:
AC02-05CH11231; GBMF3070
OSTI ID:
1625082
Journal Information:
Journal of Biological Chemistry, Vol. 288, Issue 37; ISSN 0021-9258
Publisher:
American Society for Biochemistry and Molecular BiologyCopyright Statement
Country of Publication:
United States
Language:
English

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GreenCut protein CPLD49 of Chlamydomonas reinhardtii associates with thylakoid membranes and is required for cytochrome b 6 f complex accumulation journal May 2018
Nonadiabatic transition state theory: Application to intersystem crossings in the active sites of metal-sulfur proteins journal March 2016
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Global proteome response of Synechocystis 6803 to extreme copper environments applied to control the activity of the inducible petJ promoter journal January 2019
A thylakoid membrane-bound and redox-active rubredoxin (RBD1) functions in de novo assembly and repair of photosystem II journal July 2019
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