LHC-like proteins involved in stress responses and biogenesis/repair of the photosynthetic apparatus

光防护 光合作用 类囊体 生物发生 生物 光系统I 光合反应中心 叶绿体 光系统II 跨膜蛋白 跨膜结构域 生物物理学 采光综合体 生物化学 细胞生物学 基因 受体
作者
Jean‐David Rochaix,Roberto Bassi
出处
期刊:Biochemical Journal [Portland Press]
卷期号:476 (3): 581-593 被引量:51
标识
DOI:10.1042/bcj20180718
摘要

Abstract LHC (light-harvesting complex) proteins of plants and algae are known to be involved both in collecting light energy for driving the primary photochemical reactions of photosynthesis and in photoprotection when the absorbed light energy exceeds the capacity of the photosynthetic apparatus. These proteins usually contain three transmembrane (TM) helices which span the thylakoid membranes and bind several chlorophyll, carotenoid and lipid molecules. In addition, the LHC protein family includes LHC-like proteins containing one, two, three or even four TM domains. One-helix proteins are not only present in eukaryotic photosynthetic organisms but also in cyanobacteria where they have been named high light-inducible proteins. These small proteins are probably the ancestors of the members of the extant LHC protein family which arouse through gene duplications, deletions and fusions. During evolution, some of these proteins have diverged and acquired novel functions. In most cases, LHC-like proteins are induced in response to various stress conditions including high light, high salinity, elevated temperature and nutrient limitation. Many of these proteins play key roles in photoprotection, notably in non-photochemical quenching of absorbed light energy. Moreover, some of these proteins appear to be involved in the regulation of chlorophyll synthesis and in the assembly and repair of Photosystem II and also of Photosystem I possibly by mediating the insertion of newly synthesized pigments into the photosynthetic reaction centers.

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