The manganese and calcium ions of photosynthetic oxygen evolution.
The manganese and calcium ions of photosynthetic oxygen evolution.
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DOI：
10.1016/0005-2728(92)90133-m
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发表时间：
1992-10
期刊：
影响因子：
--
通讯作者：
R. Debus
中科院分区：
文献类型：
--
作者：
R. Debus
The. llltl'.. l inlportallt Itlnclioll o| nl; lllg, lllC~, C ill biology is to catalyze Iht conxcrsion ot water to molecular oxygen. Thb, process t;. ikc~, place in l'tlolos~ Mem II near the lumenal surface of the thylakoid mcmi3ranc. Tl-e catalytic reaction is driven by light and requires four manganese. 2-3 calcium and several el ions. Our understanding of the catalytic proce,, s has advanced dramatically in the last decade. Three major sets of developments have been responsible for tim, progress. First. methods to separate PS I! from other components of the thylakoid membrane~ verc developed [1-4] and refined, both for higher plants [5-131 and cyanobactcria lsce.~ ubsection Ill-F). The high concentrations of PS I1 and relative lack of contain| haling pigments in these preparations have, nade the ca,, d~, tic p; oc¢,,~, mcrcasingls accessible to~} phisti-c, tcd,, pcctroscopic i. nalysis. Second. the development of method,, to isolate sp,: cific genes has resulted in the determtllatioll~| the amin~ l-actd sequence of evcu, constituent polypeptide of P5 II from a wide var {cty of organi,~ ms. These sequences ha~ e yielded insight into tPc structure of these polypeptides and into their Im) ssible e~ olutionary relationships and have made it i~ sihie to analyze structure/f. nction relationships by directed m~ atagcncsis. For recommended nomenclature lor the corre,, ponding uenes, xee Rcf. 14; for compendia of published. sequences.. see Refs. 15.16. For revie~, s of mdtagcnesis studies, see Refs. 17-19. Finally. the determinations tit the structures of reaction centers from the purple non-sulfur bacteria Rho, dopseudrnmmas tiridis i2| l] and Rhodohacter sphaeroides [21.221 at< 3/~ resolution {rexic~-ed in Refs. 23-28)
