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- ******************************************************
- * DNA mismatch repair proteins mutS family signature *
- ******************************************************
-
- Mismatch repair contributes to the overall fidelity of DNA replication [1]. It
- involves the correction of mismatched base pairs that have been missed by the
- proofreading element of the DNA polymerase complex. The sequence of some
- proteins involved in mismatch repair in different organisms have been found to
- be evolutionary related [2,3]. These proteins are:
-
- - Escherichia coli and Salmonella typhimurium mutS protein. Muts is thought
- to carry out the mismatch recognition step of DNA repair.
- - Streptococcus pneumoniae hexA protein. HexA is functionally similar to
- mutS.
- - Yeast MSH1 which is involved in mitochondrial DNA repair.
- - Yeast MSH2 which is involved in nuclear DNA repair.
- - Yeast MSH3 whose exact function is not yet known.
- - Fission yeast swi4, a protein involved in the termination of copy-synthesis
- during mating-type switching.
- - Mammalian protein Duc1 (DUG) or Rep-3 (Rep-1).
-
- As a signature pattern for this class of mismatch repair proteins we selected
- a region rich in glycine and negatively charged residues. This region is found
- in the C-terminal section of these proteins; about 80 residues to the C-
- terminal of an ATP-binding site motif 'A' (P-loop).
-
- -Consensus pattern: D-E-[LIVM]-G-R-G-T-x-[GT]-x-[DE]-G
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: October 1993 / Text revised.
-
- [ 1] Modrich P.
- Annu. Rev. Biochem. 56:435-466(1987).
- [ 2] Haber L.T., Walker G.C.
- EMBO J. 10:2707-2715(1991).
- [ 3] New L., Liu K., Crouse G.F.
- Mol. Gen. Genet. 239:97-108(1993).
-