Predicted to enable ATP-dependent activity, acting on DNA; DNA binding activity; and enzyme binding activity. Predicted to contribute to dinucleotide repeat insertion binding activity; single guanine insertion binding activity; and single-stranded DNA binding activity. Involved in spermatogenesis. Predicted to be located in nucleus. Predicted to be part of MutSbeta complex. Human ortholog(s) of this gene implicated in colorectal carcinoma; endometrial cancer; endometrial carcinoma; familial adenomatous polyposis 4; and lung non-small cell carcinoma. Orthologous to human MSH3 (mutS homolog 3). [provided by Alliance of Genome Resources, Apr 2022]