The extrinsic PsbO protein modulates the oxidation/reduction rate of the exogenous Mn cation at the high-affinity Mn-binding site of Mn-depleted PSII membranes
作者: Boris K. SeminTatiana E. PodkovirinaLira N. DavletshinaKirill N. TimofeevIl’ya I. IvanovAndrei B. Rubin
作者单位: 1Lomonosov Moscow State University
刊名: Journal of Bioenergetics and Biomembranes, 2015, Vol.47 (4), pp.361-367
来源数据库: Springer Nature Journal
DOI: 10.1007/s10863-015-9618-8
关键词: Photosystem IIPsbO extrinsic proteinHigh-affinity Mn-binding siteMn(II)Oxygen-evolving complex
英文摘要: Abstract(#br)The oxidation of exogenous Mn(II) cations at the high-affinity (HA) Mn-binding site in Mn-depleted photosystem II (PSII) membranes with or without the presence of the extrinsic PsbO polypeptide was studied by EPR. The six-lines EPR spectrum of Mn(II) cation disappears in the absence of the PsbO protein in membranes under illumination, but there was no effect when PSII preparations bound the PsbO protein. Our study demonstrates that such effect is determined by significant influence of the PsbO protein on the ratio between the rates of Mn oxidation and reduction at the HA site when the membranes are illuminated.
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影响因子:1.604 (2012)

  • affinity 亲和力
  • exogenous 外源的
  • protein 蛋白质
  • extrinsic 非本征
  • oxidation 氧化
  • binding 装订
  • reduction 减少
  • depleted 废弃的
  • cation 阳离子