MSH3 [SEP] found in taxon
MSH3
DNA mismatch repair protein, MutS Homolog 3 (MSH3) is a human homologue of the bacterial mismatch repair protein MutS that participates in the mismatch repair (MMR) system. MSH3 typically forms the heterodimer MutSβ with MSH2 in order to correct long insertion/deletion loops and base-base mispairs in microsatellites during DNA synthesis. Deficient capacity for MMR is found in approximately 15% of colorectal cancers, and somatic mutations in the MSH3 gene can be found in nearly 50% of MMR-deficient colorectal cancers.
Gene
primary interaction of MSH3 involves forming the MutSβ complex with MSH2. MutSβ forms as a heterodimer of MSH2 and MSH3 with two primary interaction regions: an amino-terminal region and a carboxy-terminal region. The N-terminal region of MSH3 (amino acids 126-250) contact the N-terminal region of MSH2 aa 378-625. The C-terminal regions connect at aa 1050-1128 of MSH3 and aa 875-934 of MSH2. The binding regions on MSH2 are identical when binding to either MSH3 or