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XB-ART-28299
Nucleic Acids Res 1987 Jan 26;152:477-90.
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A DNA binding protein showing sequence specificity for a region containing the replication origin of Xenopus laevis mitochondrial DNA.

Cordonnier AM , Dunon-Bluteau D , Brun G .


Abstract
In Xenopus laevis mitochondria up to 14 different polypeptides with affinity for the DNA, have been identified by the protein blotting technique. Under stringent binding conditions only one polypeptide displayed specific affinity for a restriction fragment containing the H strand origin of replication of the Xenopus laevis mt chromosome. The proteins were fractionated by double stranded DNA cellulose chromatography. Under conditions which favor high affinity interactions between proteins and DNA, a protein of the 2M NaCl step shows specific binding to the DNA fragments containing the D-loop region. Some physical properties of the protein have been studied. It has a MW of 21.5 Kd and a globular shape as can be inferred from the relationship between MW and sedimentation coefficient (2.7 S). It binds non cooperatively to DNA and forms relatively stable complexes as demonstrated by DNA competition experiments.

PubMed ID: 3029684
PMC ID: PMC340447
Article link: Nucleic Acids Res



References [+] :
Albring, Association of a protein structure of probable membrane derivation with HeLa cell mitochondrial DNA near its origin of replication. 1977, Pubmed