【摘 要】
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Dear Editor,The Mn cluster (Mn4CaO5) on the thylakoid luminal side of photosystem Ⅱ (PSII) catalyzes the photosynthetic oxygen-evolving reaction,an essential p
【机 构】
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National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15th
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Dear Editor,The Mn cluster (Mn4CaO5) on the thylakoid luminal side of photosystem Ⅱ (PSII) catalyzes the photosynthetic oxygen-evolving reaction,an essential process for life on Earth.In higher plants and green algae,the Mn cluster is surrounded by the membrane-extrinsic proteins PsbO (33 kDa),PsbP (23 kDa),and PsbQ (17 kDa) (Murata and Miyao,1985).They shield the Mn cluster,protecting and stabilizing it from attack by exogenous reductants.PsbP plays an indispensable role in PSII function,and is necessary for the retention of Ca2+ and CI-(Ghanotakis et al.,1984),the assembly of PSII complex (Yi et al.,2007),and the maintenance of normal thylakoid architecture (Yi et al.,2009).PsbP purified from Spinacia oleracea contained Mn ions,suggesting its involvement in providing Mn to PSII during the process of Mn cluster assembly (Bondarava et al.,2005).
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