publication . Other literature type . Article . 2012

Lipid functions in cytochrome bc complexes: an odd evolutionary transition in a membrane protein structure

S. Saif Hasan; William A. Cramer;
Open Access English
  • Published: 19 Dec 2012
  • Publisher: The Royal Society
Abstract
Lipid-binding sites and properties were compared in the hetero-oligomeric cytochrome (cyt) b6f and the yeast bc1 complexes that function, respectively, in photosynthetic and respiratory electron transport. Seven lipid-binding sites in the monomeric unit of the dimeric cyanobacterial b6f complex overlap four sites in the Chlamydomonas reinhardtii algal b6f complex and four in the yeast bc1 complex. The proposed lipid functions include: (i) interfacial–interhelix mediation between (a) the two 8-subunit monomers of the dimeric complex, (b) between the core domain (cyt b, subunit IV) and the six trans membrane helices of the peripheral domain (cyt f, iron–sulphur pr...
Subjects
free text keywords: Articles, General Biochemistry, Genetics and Molecular Biology, General Agricultural and Biological Sciences, Biology, Photosystem I, Cell membrane, medicine.anatomical_structure, medicine, Cytochrome b6f complex, Helix, Cytochrome, biology.protein, Membrane protein, Protein subunit, Stereochemistry, Biochemistry, Membrane lipids, Genetics
Abstract
Lipid-binding sites and properties were compared in the hetero-oligomeric cytochrome (cyt) b6f and the yeast bc1 complexes that function, respectively, in photosynthetic and respiratory electron transport. Seven lipid-binding sites in the monomeric unit of the dimeric cyanobacterial b6f complex overlap four sites in the Chlamydomonas reinhardtii algal b6f complex and four in the yeast bc1 complex. The proposed lipid functions include: (i) interfacial–interhelix mediation between (a) the two 8-subunit monomers of the dimeric complex, (b) between the core domain (cyt b, subunit IV) and the six trans membrane helices of the peripheral domain (cyt f, iron–sulphur pr...
Subjects
free text keywords: Articles, General Biochemistry, Genetics and Molecular Biology, General Agricultural and Biological Sciences, Biology, Photosystem I, Cell membrane, medicine.anatomical_structure, medicine, Cytochrome b6f complex, Helix, Cytochrome, biology.protein, Membrane protein, Protein subunit, Stereochemistry, Biochemistry, Membrane lipids, Genetics
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publication . Other literature type . Article . 2012

Lipid functions in cytochrome bc complexes: an odd evolutionary transition in a membrane protein structure

S. Saif Hasan; William A. Cramer;