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Transmembrane charge transfer in photosynthetic reaction centers: Some similarities and distinctions

Paper ID Volume ID Publish Year Pages File Format Full-Text
29639 44425 2011 7 PDF Available
Title
Transmembrane charge transfer in photosynthetic reaction centers: Some similarities and distinctions
Abstract

This mini review presents a general comparison of structural and functional peculiarities of three types of photosynthetic reaction centers (RCs) – photosystem (PS) II, RC from purple bacteria (bRC) and PS I. The nature and mechanisms of the primary electron transfer reactions, as well as specific features of the charge transfer reactions at the donor and acceptor sides of RCs are considered. Comparison of photosynthetic RCs shows general similarity between the core central parts of all three types, between the acceptor sides of bRC and PS II, and between the donor sides of bRC and PS I. In the latter case, the similarity covers thermodynamic, kinetic and dielectric properties, which determine the resemblance of mechanisms of electrogenic reduction of the photooxidized primary donors. Significant distinctions between the donor and acceptor sides of PS I and PS II are also discussed.The results recently obtained in our laboratory indicate in favor of the following sequence of the primary and secondary electron transfer reactions: in PS II (bRC): Р680(Р870) → ChlD1(ВА) → Phe(bPhe) → QA; and in PS I: Р700 → А0А/A0B → QA/QB.

Research highlights► Comparison of three major types of photosynthetic reaction centers (RC) is presented. ► These RCs are photosystem (PS) I, PS II and RC from purple bacteria (bRC). ► The comparison is based on the structure and electron transfer mechanisms. ► The acceptor sides of bRC and PS II and donor sides of bRC and PS I are similar.

Keywords
Photosynthetic reaction centers; Transmembrane charge transfer; Primary charge separation; Electrogenic reactions; Similarities and distinctions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 104, Issues 1–2, July–August 2011, Pages 326–332
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us