Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria.

Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria. Research Abstract Details 

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Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria. Abstract Text:

T Kumamoto,K Morohashi,A Ito,T Omura,

The precursor of cytochrome P-450(SCC) (preP-450(SCC], an inner membrane protein of adrenal cortex mitochondria, has an extension peptide consisting of 39 amino acids which is thought to play an essential role in the import of the precursor into mitochondria. The amino terminal portion of the extension peptide contains three positively charged amino acid residues, Arg(4), Arg(9), and Lys(14). To investigate their role in the import of preP-450(SCC) into mitochondria, they were replaced by other amino acids, Ser or Thr, by site-directed mutagenesis. The import of mutated preP-450(SCC)s with single amino acid substitution was much less efficient than with the original precursor. The mutated preP-450(SCC)s with two or three substitutions were not imported. These results suggest that the positively charged amino acid residues in the amino terminal portion of the extension peptide are essential for the import of preP-450(SCC) into mitochondria.

Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria. Publishing Authors By Initials

T Kumamoto,K Morohashi,A Ito,T Omura,

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Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of biochemistry

VOLUME: 102

Page Numbers: 833-8

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Oct

YEAR: 1987

Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria. Information

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LANGUAGE: eng

NlmUniqueID: 376600

Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria. Keywords Mesh Terms:

KEYWORDS: Peptides

MESH TERMS: genetics

Chemical & Substance for Abstract: Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria. Information

Substance Name: Cholesterol Side-Chain Cleavage Enzyme

Registry Number: EC 1.14.15.6

Grant and Affiliation Information for Site-directed mutagenesis of basic amino acid residues in the extension peptide of P-450(SCC) precursor: effects on the import of the precursor into mitochondria.

AFFILIATION: Department of Biology, Faculty of Science, Kyushu University, Fukuoka.

Country: JAPAN

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MEDLINETA: J Biochem

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