Jean Velours

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We disassembled monomeric and dimeric yeast ATP synthase under mild conditions to identify labile proteins and transiently stable subcomplexes that had not been observed before. Specific removal of subunits alpha, beta, oligomycin sensitivity conferring protein (OSCP), and h disrupted the ATP synthase at the gamma-alpha(3)beta(3) rotor-stator interface.(More)
Amyloid deposits and neurofibrillary tangles (NFT) are the two hallmarks that characterize Alzheimer's disease (AD). In order to find the molecular partners of these degenerating processes, we have developed antibodies against insoluble AD brain lesions. One clone, named AD46, detects only NFT. Biochemical and histochemistry analyses demonstrate that the(More)
The proapoptotic mammalian protein Bax associates with mitochondrial membranes and confers a lethal phenotype when expressed in yeast. By generating Bax-resistant mutant yeast and using classical complementation cloning methods, subunits of the mitochondrial F0F1-ATPase proton pump were determined to be critical for Bax-mediated killing in S. cerevisiae. A(More)
The arrangement of the N-terminal part of subunit 4 (subunit b) has been studied by the use of mutants containing cysteine residues in a loop connecting the two N-terminal postulated membrane-spanning segments. Labelling of the mutated subunit 4 by the fluorescent probe N-(7-(dimethylamino)-4-methyl-3-coumarinyl)maleimide revealed that the sulfhydryl groups(More)
The interaction between the hydrophilic C-terminal part of subunit 4 (subunit b) and OSCP, which are two components of the connecting stalk of the yeast ATP synthase, was shown after reconstitution of the two over-expressed proteins and by the two-hybrid method. The organization of a part of the F0 sector was studied by the use of mutants containing(More)
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