Journal
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
Volume 1555, Issue 1-3, Pages 204-209Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0005-2728(02)00279-7
Keywords
photosynthesis; mutagenesis; electrostatic interaction; membrane protein complex; electron transfer; iron-sulfur center
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The reaction center of photosystem I (PSI) reduces soluble ferredoxin on the stromal side of the photosynthetic membranes of cyanobacteria and chloroplasts. The X-ray structure of PSI from the cyanobacterium Synechococcus elongatus has been recently established at a 2.5 Angstrom resolution [Nature 411 (2001) 909]. The kinetics of ferredoxin photoreduction has been studied in recent years in many mutants of the stromal subunits PsaC, PsaD and PsaE of PSI. We discuss the ferredoxin docking site of PSI using the X-ray structure and the effects brought by the PSI mutations to the ferredoxin affinity. (C) 2002 Elsevier Science B.V. All rights reserved.
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