title: Photolabeling of mitochondrial F1-ATPase by an azido derivative of the oligomycin-sensitivity conferring protein.
abstract: An azido derivative of the oligomycin sensitivity conferring protein (OSCP) was prepared by alkylation with the bifunctional reagent p-azido phenacyl bromide. Azido-OSCP was fully biologically active in the dark. Upon photoirradiation of a mixture of beef heart mitochondrial F1-ATPase and azido-OSCP, the resulting covalent photoproducts were separated by polyacrylamide gel electrophoresis in the presence of Na dodecyl sulfate and characterized by an immunochemical procedure. OSCP was found to react with the alpha and the beta subunits of F1 with strong preference for the alpha subunit.
authors.forename: A
authors.initials: A
authors.lastname: Dupuis
authors.forename: P V
authors.initials: PV
authors.lastname: Vignais
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000345:Affinity Labels / Q000378:metabolism*; D000818:Animals; D001386:Azides / Q000378:metabolism; D002352:Carrier Proteins; D002417:Cattle; D003624:Darkness; D004591:Electrophoresis, Polyacrylamide Gel; D046911:Macromolecular Substances; D008565:Membrane Proteins / Q000378:metabolism*; D025261:Mitochondrial Proton-Translocating ATPases; D008970:Molecular Weight; D010777:Photochemistry; D006180:Proton-Translocating ATPases / Q000378:metabolism*
chemical_list: D000345:Affinity Labels; D001386:Azides; D002352:Carrier Proteins; D046911:Macromolecular Substances; D008565:Membrane Proteins; D000251:Adenosine Triphosphatases; D025261:Mitochondrial Proton-Translocating ATPases; D006180:Proton-Translocating ATPases; C020439:oligomycin sensitivity-conferring protein; C011171:4-azidophenacyl bromide