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Electron transfer pathways in photosystem I reaction centers

โœ Scribed by Nikolaj Ivashin; Sven Larsson

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
213 KB
Volume
375
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Electron transfer following charge separation in the photosystem I (PSI) reaction center of Synechococcus elongatus is studied using theoretical methods. The difference in rate between two almost symmetrical A-and B-branches is caused by a difference in a single residue (Trp B673 versus Gly A693), close to the F X iron-sulfur cluster. Partly due to its polar environment, Trp B673 acts as an electron acceptor in its p-system. The rate increases on the B-side due to shortened distances for electron transfer.

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