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DNA mismatch repair protein （MSH6） is one of the mismatch repair proteins and is encoded by the MSH6 gene, which is located on chromosome 2 and is 23,806 bp in length, including 10 exons and 83 untranslated regions. The MSH6 protein consists of 1,358 amino acid residues and forms a heterodimer with another mismatch repair protein, MSH2. The MSH2-MSH6 heterodimeric complex is able to recognize base-base substitution and single-base insertion/deletion mismatches. Germline mutations of MSH6 lead to high susceptibility to glioma, as well as a number of benign or malignant tumors in other organs.