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Biochem Biophys Res Commun. 1991 Jul 31;178(2):793-9.

Molecular cloning of cDNA for the import precursor of human coupling factor 6 of H(+)-ATP synthase in mitochondria.

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  • 1Faculty of Pharmaceutical Sciences, University of Tokushima, Japan.


The nucleotide sequence of the import precursor of coupling factor 6 (factor 6) of human H(+)-ATP synthase has been determined from a recombinant cDNA clone isolated by screening a human kidney cDNA library with a cDNA for rat factor 6 as a probe. The sequence was composed of 466 nucleotides including a coding region for the import precursor of factor 6 and noncoding regions on the 5'- and 3'-sides. The import precursor of factor 6 and its mature polypeptide deduced from the open reading frame were found to consist of 108 and 76 amino acid residues with molecular weights of 12,596 and 8,969, respectively. The presequence of 32 amino acids could be the import signal peptide for directing the protein into the mitochondrial matrix.

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