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"MSH6, a Saccharomyces cerevisiae protein that binds to mismatches as a heterodimer with MSH2."

Iaccarino I, Palombo F, Drummond J, Totty NF, Hsuan JJ, Modrich P, Jiricny J



Published April 1, 1996 in Curr Biol volume 6 .

Pubmed ID: 8723353

Abstract:
The process of post-replicative DNA-mismatch repair seems to be highly evolutionarily conserved. In Escherichia coli, DNA mismatches are recognized by the MutS protein. Homologues of the E. coli mutS and mutL mismatch-repair genes have been identified in other prokaryotes, as well as in yeast and mammals. Recombinant Saccharomyces cerevisiae MSH2 (MSH for MutS homologue) and human hMSH2 proteins have been shown to bind to mismatch-containing DNA in vitro. However, the physiological role of hMSH2 is unclear, as shown by the recent finding that the mismatch-binding factor hMutS alpha isolated from extracts of human cells is a heterodimer of hMSH2 and another member of the MSH family, GTBP. It has been reported that S. cerevisiae possesses a mismatch-binding activity, which most probably contains MSH2. We show here that, as in human cells, the S. cerevisiae binding factor is composed of MSH2 and a new functional MutS homologue, MSH6, identified by its homology to GTBP.


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Last modification of this entry: Oct. 6, 2010

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