Structure and functional role of supercomplexes of IsiA and Photosystem I in cyanobacterial photosynthesis

Roman Kouřil, Ana A. Arteni, Julia Lax, Nataliya Yeremenko, Sandrine D' Haene, Matthias Rögner, Hans C.P. Matthijs, Jan P. Dekker, Egbert J. Boekema


74 Citaten (Scopus)
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Cyanobacteria express large quantities of the iron stress-inducible protein IsiA under iron deficiency. IsiA can assemble into numerous types of single or double rings surrounding Photosystem I. These supercomplexes are functional in light-harvesting, empty IsiA rings are effective energy dissipaters. Electron microscopy studies of these supercomplexes show that Photosystem I trimers bind 18 IsiA copies in a single ring, whereas monomers may bind up to 35 copies in two rings. Work on mutants indicates that the PsaF/J and PsaL subunits facilitate the formation of closed rings around Photosystem I monomers but are not obligatory components in the formation of Photosystem I–IsiA supercomplexes.
Originele taal-2English
Pagina's (van-tot)3253 - 3257
Aantal pagina's5
TijdschriftFEBS Letters
Nummer van het tijdschrift15
StatusPublished - 2005

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