Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.6.3.14 (ATP synthase)
 7,042 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Respiratory-competent nuclear mutants have been isolated which presented a cryosensitive phenotype on a non-fermentative carbon source, due to a dysfunctioning of the mitochondrial F1-Fo ATP synthase which results from a relative defect in subunits 6 and 8 of the Fo sector. Both proteins are mtDNA-encoded, but the defect is due to the simultaneous presence of a mutation in two unlinked nuclear genes (NCA2 and NCA3, for Nuclear Control of ATPase) promoting a modification of the expression of the ATP8-ATP6 co-transcript (formerly denoted AAP1-OLI2). This co-transcript matures at a unique site to give two cotranscripts of 5.2 and 4.6 kb in length: in the mutant, the 5.2-kb co-transcript was greatly lowered. NCA3 was isolated from a wild-type yeast genomic library by genetic complementation. The level of the 5.2-kb transcript, like the synthesis of subunits 6 and 8, was partly restored in the transformed strain. A 1011-nucleotide ORF was identified that encodes an hydrophilic protein of 35417 Da. Disruption of chromosomal DNA within the reading frame promoted a dramatic decrease of the 5.2-kb mRNA but did not abolish the respiratory competence of a wild-type strain. NCA3 is located on chromosome IV and produces a single 1780-b transcript.
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PMID:NCA3, a nuclear gene involved in the mitochondrial expression of subunits 6 and 8 of the Fo-F1 ATP synthase of S. cerevisiae. 758 26

Respiratory-competent nuclear mutants have been isolated which presented a cryosensitive phenotype on a non-fermentable carbon source, due to a dysfunction of the mitochondrial F1-Fo ATP synthase. This defect results from an alteration of the mtDNA-encoded protein synthesis level of subunits 6 and 8 of the Fo sector, due to the simultaneous presence of a mutation in two unlinked nuclear genes. These mutations promote a modification of the expression of the cotranscript ATP8-ATP6 (formerly denoted AAP1-OL12): this mRNA undergoes a maturation at a unique site reaching to two cotranscripts of 5.2 and 4.6 kb in length: in the mutant, the relative amount of 5.2 kb cotranscript was greatly lowered. NCA2 was isolated from a wild-type yeast genomic library by genetic complementation. The relative level of the 5.2 kb transcript, as the synthesis of subunits 6 and 8, was partly restored in the transformed strain. A 1848 nucleotide open reading frame was depicted that encoded an amphiphilic protein of 70,816 Da. Disruption of chromosomal DNA within the reading frame promoted a dramatic decrease of the 5.2 kb mRNA but did not abolish the respiratory competence of a wild-type strain. Hybridization analyses indicated that NCA2 is located on chromosome XVI and produces a single 2750 base transcript.
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PMID:NCA2, a second nuclear gene required for the control of mitochondrial synthesis of subunits 6 and 8 of ATP synthase in Saccharomyces cerevisiae. 772 16