Independent evolution of the prochlorophyte and green plant chlorophyll a/b light-harvesting proteins

作者：Julie La Roche, Georg W.M. van der Staay, Frédéric Partensky, Axel Ducret, Ruedi Aebersold, Ruo-Ning Li, Susan S. Golden, Roger G. Hiller, Pamela M. Wrench, Anthony W. D. Larkum, Beverley R. Green · 发表于：Proceedings of the National Academy of Sciences · 年份：1996 · DOI：10.1073/pnas.93.26.15244 · 被引用次数：235 · 研究领域：Photosynthetic Processes and Mechanisms、Algal biology and biofuel production、Microbial Community Ecology and Physiology

The prochlorophytes are oxygenic prokaryotes differing from other cyanobacteria by the presence of a light-harvesting system containing both chlorophylls (Chls) a and b and by the absence of phycobilins. We demonstrate here that the Chl a/b binding proteins from all three known prochlorophyte genera are closely related to IsiA, a cyanobacterial Chl a-binding protein induced by iron starvation, and to CP43, a constitutively expressed Chl a antenna protein of photosystem II. The prochlorophyte Chl a/b protein (pcb) genes do not belong to the extended gene family encoding eukaryotic Chl a/b and Chl a/c light-harvesting proteins. Although higher plants and prochlorophytes share common pigment complements, their light-harvesting systems have evolved independently.