Recombinant Human DNA mismatch repair protein Msh3 (MSH3), Truncated

Uniprot Id

P20585

Target Species

Human

Target Name

MSH3

Target Full Name

DNA mismatch repair protein Msh3

Target Function

Component of the post-replicative DNA mismatch repair system (MMR). Heterodimerizes with MSH2 to form MutS beta which binds to DNA mismatches thereby initiating DNA repair. When bound, the MutS beta heterodimer bends the DNA helix and shields approximately 20 base pairs. MutS beta recognizes large insertion-deletion loops (IDL) up to 13 nucleotides long. After mismatch binding, forms a ternary complex with the MutL alpha heterodimer, which is thought to be responsible for directing the downstream MMR events, including strand discrimination, excision, and resynthesis.

Target Involvement

Endometrial cancer (ENDMC); Familial adenomatous polyposis 4 (FAP4)

Target Protein Families

DNA mismatch repair MutS family, MSH3 subfamily

Target Synonyms

Divergent upstream protein; DNA mismatch repair protein; DNA mismatch repair protein Msh 3; DNA mismatch repair protein MSH3; DUC 1; DUC1; DUG; DUP; hMSH3; MGC163306; MGC163308; Mismatch repair protein 1; MRP 1; MRP1; MSH 3; MSH3; MSH3_HUMAN; MutS homolog 3 (E. coli); MutS homolog 3

Target Background

The protein encoded by this gene forms a heterodimer with MSH2 to form MutS beta, part of the post-replicative DNA mismatch repair system. MutS beta initiates mismatch repair by binding to a mismatch and then forming a complex with MutL alpha heterodimer. This gene contains a polymorphic 9 bp tandem repeat sequence in the first exon. The repeat is present 6 times in the reference genome sequence and 3-7 repeats have been reported. Defects in this gene are a cause of susceptibility to endometrial cancer.