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

J. La Roche, G. W. M. Van Der Staay, F. Partensky, A. Ducret, R. Aebersold, R. Li, S. S. Golden, R. G. Hiller, P. M. Wrench, A. W. D. Larkum, B. R. Green*

*Corresponding author for this work

Research output: Contribution to journalArticle

163 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)15244-15248
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume93
Issue number26
DOIs
Publication statusPublished - 24 Dec 1996

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