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Cytochrome b 6 f is a dimeric protochlorophyll a binding complex in etioplasts
Author(s) -
Reisinger Veronika,
Hertle Alexander P.,
Plöscher Matthias,
Eichacker Lutz A.
Publication year - 2008
Publication title -
the febs journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 204
eISSN - 1742-4658
pISSN - 1742-464X
DOI - 10.1111/j.1742-4658.2008.06268.x
Subject(s) - cytochrome b6f complex , cytochrome f , chloroplast , cytochrome , photosynthesis , protein subunit , chemistry , chlorophyll a , cytochrome b , photosystem i , biophysics , biochemistry , biology , photosystem ii , enzyme , gene , mitochondrial dna
The cytochrome b 6 f complex is a dimeric protein complex that is of central importance for photosynthesis to carry out light driven electron and proton transfer in chloroplasts. One molecule of chlorophyll a was found to associate per cytochrome b 6 f monomer and the structural or functional importance of this is discussed . We show that etioplasts which are devoid of chlorophyll a already contain dimeric cytochrome b 6 f. However, the phytylated chlorophyll precursor protochlorophyll a , and not chlorophyll a , is associated with subunit b 6 . The data imply that a phytylated tetrapyrrol is an essential structural requirement for assembly of cytochrome b 6 f.