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Eur J Biochem. 1991 Apr 10;197(1):105-11.

Isolation of the ATP synthase subunit 6 and sequence of the mitochondrial ATP6 gene of the yeast Candida parapsilosis.

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Institut de Biochimie Cellulaire et Neurochimie du Centre National de la Recherche Scientifique, Université de Bordeaux II, France.


The mitochondrially translated product called subunit 6 was extracted from the yeast Candida parapsilosis mitochondria using an organic solvent mixture and purified by reverse-phase HPLC. The partial N-terminal sequence of subunit 6 reveals a post-translational cleavage site as in Saccharomyces cerevisiae. The structural mitochondrial gene ATP6 was isolated form a mitochondrial DNA library using the oligonucleotide probe procedure. The gene and the surrounding regions were cloned into M13tg130 and M13tg131 phage vectors. The insert contained an open reading frame 738-bp encoding a 246-amino-acid polypeptide. Mature subunit 6 contains 243 amino acid residues and the predicted molecular mass is 26,511 Da. The subunit shows 52% similarity with ATP synthase subunit 6 of the yeast S. cerevisiae. Comparison between protein and DNA sequences shows that the CUN codon family codes for a leucine in C. parapsilosis mitochondria.

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