Transmembrane signaling and assembly of the cytochrome b6f-lipidic charge transfer complex
نویسندگان
چکیده
منابع مشابه
A novel pathway of cytochrome c biogenesis is involved in the assembly of the cytochrome b6f complex in arabidopsis chloroplasts.
We recently characterized a novel heme biogenesis pathway required for heme c(i)' covalent binding to cytochrome b6 in Chlamydomonas named system IV or CCB (cofactor assembly, complex C (b6f), subunit B (PetB)). To find out whether this CCB pathway also operates in higher plants and extend the knowledge of the c-type cytochrome biogenesis, we studied Arabidopsis insertion mutants in the ortholo...
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The lumen segment of cytochrome f consists of a small and a large domain. The role of the small domain in the biogenesis and stability of the cytochrome b(6)f complex and electron transfer through the cytochrome b(6)f complex was studied with a small domain deletion mutant in Chlamydomonas reinhardtii. The mutant is able to grow photoautotrophically but with a slower rate than the wild type str...
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We used fast absorbance spectroscopy to investigate in vivo binding dynamics and electron transfer between plastocyanin (pc) and photosystem I (PSI), and cytochrome (cyt) f oxidation kinetics in Chlamydomonas reinhardtii mutants in which either the binding or the release of pc from PSI was diminished. Under single flash-excitation conditions, electron flow between PSI and the cyt complex was no...
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Absorption spectra of the purified cytochrome b(6)f complex from Chlamydomonas reinhardtii were monitored as a function of the redox potential. Four spectral and redox components were identified: in addition to heme f and the two b hemes, the fourth component must be the new heme c(i) (also denoted x) recently discovered in the crystallographic structures. This heme is covalently attached to th...
متن کاملSOME NEW STRUCTURAL ASPECTS AND OLD CONTROVERSIES CONCERNING THE CYTOCHROME b6f COMPLEX OF OXYGENIC PHOTOSYNTHESIS.
The cytochrome b6f complex functions in oxygenic photosynthetic membranes as the redox link between the photosynthetic reaction center complexes II and I and also functions in proton translocation. It is an ideal integral membrane protein complex in which to study structure and function because of the existence of a large amount of primary sequence data, purified complex, the emergence of struc...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Bioenergetics
سال: 2013
ISSN: 0005-2728
DOI: 10.1016/j.bbabio.2013.03.002