Papers

Jun, 2005

Near-infrared-induced transitions in the manganese cluster of photosystem II: Action spectra for the S-2 and S-3 redox states

PLANT AND CELL PHYSIOLOGY
  • A Boussac
  • ,
  • M Sugiura
  • ,
  • D Kirilovsky
  • ,
  • AW Rutherford

Volume
46
Number
6
First page
837
Last page
842
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1093/pcp/pci088
Publisher
OXFORD UNIV PRESS

The Mn4Ca complex that is involved in water oxidation in PSII is affected by near-infrared (NIR) light in certain redox states and these phenomena can be monitored by electron paramagnetic resonance (EPR) at low temperature. Here we report the action spectra of the NIR effects in the S-2 and S-3 states in PSII from plants and the thermophilic cyanobacterium Thermosynechococcus elongatus. The action spectra obtained are very similar in both S states, indicating the presence of the same photoactive form of the Mn4Ca complex in both states. Since the chemical nature of the photoactive species is not known, an unequivocal interpretation of this result cannot be made; however, it appears to be more easily reconciled with the view that the redox state of the Mn4Ca cluster does not change from the S-2 to the S-3 transition, at least in those centers sensitive to NIR light. The temperature dependence of the NIR effect and the action spectra for S-2 indicate the presence of structural heterogeneity in the Mn4Ca cluster.

Link information
DOI
https://doi.org/10.1093/pcp/pci088
CiNii Articles
http://ci.nii.ac.jp/naid/10016454221
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/15769805
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000230090400003&DestApp=WOS_CPL
ID information
  • DOI : 10.1093/pcp/pci088
  • ISSN : 0032-0781
  • CiNii Articles ID : 10016454221
  • Pubmed ID : 15769805
  • Web of Science ID : WOS:000230090400003

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