Nucleic Acids Research, 1985, Vol. 13, No. 5 1703-1716
© 1985
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Characterization of a mitochondrial protein binding to single-stranded DNA
Laboratoire de Biologie Générale, Bâtiment 400, Université de Paris-Sud F-91405 Orsay Cedex, France
Received December 4, 1984. Revised February 4, 1985. Accepted February 4, 1985.
A DNA-binding protein from Xenopus Laevis oocyte mitochondria which has been found associated with the D-loop also shows a strong preference for single-stranded DNA. The binding to polynucleotides is dependent on the base composition, but no sequence specificity was found. This protein, called mtSSB, binds tightly and cooperatively to single-stranded DNA. By its amino-acid composition and its binding properties it appears to be similar to the single-stranded DNA-binding proteins found in prokaryotes.
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