PROTECTION OF THE OXYGEN-EVOLVING PHOTOSYSTEM-II COMPLEX BY GLYCINEBETAINE

被引：82
作者：
PAPAGEORGIOU, GC
FUJIMURA, Y
MURATA, N
机构：
[1] NATL INST BASIC BIOL,OKAZAKI,AICHI 444,JAPAN
[2] GRAD UNIV ADV STUDIES,SCH LIFE SCI,DEPT MOLEC BIOMECH,OKAZAKI,JAPAN
来源：
BIOCHIMICA ET BIOPHYSICA ACTA | 1991年 / 1057卷 / 03期
关键词：
PHOTOSYSTEM-II; OXYGEN EVOLUTION; BETAINE; (SPINACH THYLAKOID);
D O I：
10.1016/S0005-2728(05)80148-3
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The effect of glycinebetaine, a nontoxic osmolite of halophilic plants, on the photosynthetic oxygen evolution was investigated with Photosystem II (PS II) particles prepared from spinach thylakoids and another type of PS II particles (dPS II particles) that had been depleted of the 18 kDa and the 23 kDa extrinsic proteins. Betaine protected PS II particles from the inactivation of oxygen evolution by high concentrations of NaCl, in which the chaotropic effect of Cl- dissociated the 18 kDa and 23 kDa extrinsic proteins from the oxygen-evolving PS II complex. However, it failed to protect dPS II particles, in which the inactivation of oxygen evolution was caused by the effect of Na+ ions.
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页码：361 / 366
页数：6
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