PMID: 11607372Mar 1, 1993Paper

Oxygen evolution in photosynthesis: from unicycle to bicycle

Proceedings of the National Academy of Sciences of the United States of America
Vladimir P Shinkarev, C A Wraight

Abstract

Flash-induced oxygen evolution in the thylakoids of plants and algae exhibits damped oscillations with period four. These are well described by the S-state model of Kok et al. [Kok, B., Forbush, B. & McGloin, M. (1970) Photochem. Photobiol. 11, 457-475], with damping provided by empirical misses and double hits in the reaction center of photosystem II. Here we apply a mechanistic interpretation of misses as mainly determined by reaction centers that are inactive at the time of the flash due to the presence of either P+ or QA, according to the electron transfer equilibria on the donor and acceptor sides of the reaction center. Calculation of misses on this basis, using known or estimated values of the equilibrium constants for electron transfer between the S states and tyrosine Yz, between Yz and P680, as well as between the acceptor plastoquinones, allows a natural description of the flash number dependence of oxygen evolution. The calculated misses are different for each flash-induced reaction center transition. Identification of this mechanism underlying the miss factor for each transition leads to the recognition of two different reaction sequence cycles of photosystem II, with different transition probabilities, producing a...Continue Reading

References

Sep 25, 1990·Biochemistry·C A BuserG W Brudvig
Jan 1, 1988·Proceedings of the National Academy of Sciences of the United States of America·R J DebusL McIntosh
Jun 1, 1970·Photochemistry and Photobiology·B KokM McGloin
Dec 1, 1980·Biochimica Et Biophysica Acta·B Bouges-Bocquet
Nov 1, 1988·Proceedings of the National Academy of Sciences of the United States of America·W F VermassO Hansson

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Citations

Jan 1, 1993·Photosynthesis Research·V P Shinkarev, C A Wraight
Jan 1, 1993·Photosynthesis Research·A L Etienne, D Kirilovsky
Jul 27, 2007·Photosynthesis Research·Dmitriy ShevelaJohannes Messinger
Sep 27, 2008·Photosynthesis Research·Birgit NöringJohannes Messinger
Jul 6, 2013·Photosynthesis Research·Dmitriy ShevelaJohannes Messinger
Jul 24, 2015·Photosynthesis Research· GovindjeeDonald R Ort
Mar 21, 1998·British Journal of Obstetrics and Gynaecology·S Brown, J Lumley
Jun 17, 2004·BJOG : an International Journal of Obstetrics and Gynaecology·Vanora Hundley, Mandy Ryan
Feb 7, 2008·Physiologia Plantarum·Markus Grabolle, Holger Dau
Sep 10, 2005·Social Science & Medicine·Denis Walsh
Apr 17, 2012·Biochimica Et Biophysica Acta·Dmitriy Shevela, Johannes Messinger
Jun 28, 2003·Biophysical Journal·Vladimir P Shinkarev
Mar 21, 2002·Birth·V HundleyW Graham
Jan 1, 1996·Photosynthesis Research·P C MeunierL A Sherman
Apr 11, 2003·Journal of Midwifery & Women's Health·Lesley Page
Mar 1, 2012·The Journal of Biological Chemistry·Guangye HanStenbjörn Styring
Mar 1, 2012·The Journal of Biological Chemistry·Miwa SugiuraAlain Boussac
Jul 25, 2000·Journal of Biological Inorganic Chemistry : JBIC : a Publication of the Society of Biological Inorganic Chemistry·N IoannidisV Petrouleas
Nov 16, 2020·Journal of Bioenergetics and Biomembranes·Andrey A ZaspaMahir D Mamedov
Mar 16, 2021·Biochimica Et Biophysica Acta. Bioenergetics·Mahir D MamedovGiovanni Venturoli
Oct 24, 1998·Biochimica Et Biophysica Acta·D H Stewart, G W Brudvig

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