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具有氧光合作用的进化上不同物种中的类囊体蛋白磷酸化

Thylakoid protein phosphorylation in evolutionally divergent species with oxygenic photosynthesis.

作者信息

Pursiheimo S, Rintamäki E, Baena-Gonzalez E, Aro E M

机构信息

Department of Biology, University of Turku, Finland.

出版信息

FEBS Lett. 1998 Feb 20;423(2):178-82. doi: 10.1016/s0014-5793(98)00088-x.

Abstract

Phosphothreonine antibody was used to explore reversible thylakoid protein phosphorylation in vivo in evolutionally divergent organisms with oxygenic photosynthesis. Three distinct groups of organisms were found. Cyanobacteria and red algae, both with phycobilisome antenna system, did not show phosphorylation of any of the photosystem II (PSII) proteins and belong to group 1. Group 2 species, consisting of a moss, a liverwort and a fern, phosphorylated both the light-harvesting chlorophyll alb proteins (LHCII) and the PSII core proteins D2 and CP43, but not the D1 protein. Reversible phosphorylation of the D1 protein seems to be the latest event in the evolution of PSII protein phosphorylation and was found only in seed plants, in group 3 species. Light-intensity-dependent regulation of LHCII protein phosphorylation was similar in group 2 and 3 species, with maximal phosphorylation of LHCII at low light and nearly complete dephosphorylation at high light.

摘要

磷酸苏氨酸抗体被用于在具有氧光合作用的进化上不同的生物体中探索体内类囊体蛋白的可逆磷酸化。发现了三类不同的生物体。蓝细菌和红藻都具有藻胆体天线系统,未显示任何光系统II(PSII)蛋白的磷酸化,属于第1组。第2组物种包括一种苔藓、一种地钱和一种蕨类植物,它们使捕光叶绿素alb蛋白(LHCII)以及PSII核心蛋白D2和CP43发生磷酸化,但不使D1蛋白磷酸化。D1蛋白的可逆磷酸化似乎是PSII蛋白磷酸化进化中的最新事件,仅在第3组物种的种子植物中发现。第2组和第3组物种中LHCII蛋白磷酸化的光强依赖性调节相似,LHCII在低光下磷酸化程度最高,在高光下几乎完全去磷酸化。

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