The role of the high potential form of the cytochrome b559: Study of Thermosynechococcus elongatus mutants

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The role of the high potential form of the cytochrome b559: Study of Thermosynechococcus elongatus mutants

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作者：Fernando Guerrero^a ; ^b ; ¹ ; ^{Fernando.guerrero@helsinki.fi" class="auth_mail} ; Jorge L. Zurita^a ; ^b ; ² ; ^{jorge.zurita@juntadeandalucia.es" class="auth_mail} ; Mercedes Roncel^a ; ^{mroncel@us.es" class="auth_mail} ; Diana Kirilovsky^b ; ^{kirilovsky@cea.fr" class="auth_mail} ; José ; M. Ortega^a ; ^{ortega@us.es" class="auth_mail}
关键词：B band ; thermoluminescence emission due to S2/3QB&minus ; charge recombination reaction ; Chl ; chlorophyll ; Cm ; chloramphenicol ; CP43 ; a proximal antenna complex of photosystem II ; Cyt ; cytochrome ; Eh ; redox potential of the solution ; Em ; midpoint redox potential ; HP ; IP and LP ; high ; intermediate and low potential forms ; HTL ; high temperature thermoluminescence ; MES ; 2-(N-morpholino) ethanesulfonic acid ; OEC ; oxygen evolving complex ; P680 ; primary electron donor in PSII ; PSII ; photosystem II ; QA
刊名：Biochimica et Biophysica Acta (BBA)/Bioenergetics
出版年：June 2014
年：2014
卷：1837
期：6
页码：908-919
全文大小：1502 K

文摘

•: Six site-directed mutants of cytochrome b559 have been studied.
•: The redox potential of the HP form was significantly altered in 伪R18S and 伪I27T mutant strains.
•: The 伪R18S strain showed a high sensitivity to photoinhibitory illumination.
•: The 伪R18S strain showed a deficient plastoquinol oxidase activity of cytochrome b559.
•: The HP form may be a key element on the secondary electron transfer reactions in PSII.

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