The bovine mitochondrial endonuclease prefers a conserved sequence in the displacement loop region of mitochondrial DNA.

R. L. Low, Oscar Cummings, T. C. King

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The purified endonuclease of bovine heart mitochondria shows a remarkable preference for a specific site in bovine mtDNA. This site was identified using a recombinant DNA template which includes a 4.9-kilobase portion of the 16-kilobase bovine mitochondrial sequence encompassing all of the displacement loop region. The endonucleolytic target corresponds to an evolutionarily conserved sequence tract of 12 consecutive guanine residues that is found in an otherwise highly divergent domain of the mitochondrial displacement loop region. The preference for this site is several hundred-fold greater than other less favored sites. Unlike other less prominent cleavage loci, the conserved sequence tract is readily nicked in either or both DNA strands, even at 0 degrees C. These findings suggest that there is a specific interaction of the endonuclease with this site in vivo that may be important for mtDNA replication.

Original languageEnglish (US)
Pages (from-to)16164-16170
Number of pages7
JournalJournal of Biological Chemistry
Volume262
Issue number33
StatePublished - Nov 25 1987
Externally publishedYes

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Conserved Sequence
Endonucleases
Mitochondrial DNA
Mitochondria
Recombinant DNA
Guanine
Heart Mitochondria
DNA
bovine mitochondrial endonuclease

ASJC Scopus subject areas

  • Biochemistry

Cite this

The bovine mitochondrial endonuclease prefers a conserved sequence in the displacement loop region of mitochondrial DNA. / Low, R. L.; Cummings, Oscar; King, T. C.

In: Journal of Biological Chemistry, Vol. 262, No. 33, 25.11.1987, p. 16164-16170.

Research output: Contribution to journalArticle

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