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. 1984 Dec 1;3(12):2831–2837. doi: 10.1002/j.1460-2075.1984.tb02216.x

Subunit IV of yeast cytochrome c oxidase: cloning and nucleotide sequencing of the gene and partial amino acid sequencing of the mature protein.

A C Maarse, A P Van Loon, H Riezman, I Gregor, G Schatz, L A Grivell
PMCID: PMC557773  PMID: 6098449

Abstract

The six small subunits (IV-VII, VIIa, VIII) of yeast cytochrome c oxidase are encoded by nuclear genes and imported into the mitochondria. We have isolated the gene for subunit IV from a yeast genomic clone bank and determined its complete nucleotide sequence. We have also isolated subunit IV from purified yeast cytochrome c oxidase and determined most of its amino acid sequence which confirms the positioning of approximately 90% of the amino acid residues. The sequence comparison shows that the coding sequence of the gene lacks introns and that subunit IV is made as a precursor with an amino-terminal extension of 25 residues, five of which are basic and none of them acidic. Precursor processing involves cleavage of a Leu-Gln bond.

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Selected References

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