a protein involved in the repair of mismatches in DNA. Binds PMS2 or MLH1 and MLH3. Part of the BRCA1-associated genome surveillance complex (BASC), which contains BRCA1, MSH2, MSH6, MLH1, ATM, BLM, PMS2 and the RAD50- MRE11-NBS1 protein complex. This association could be a dynamic process changing throughout the cell cycle and within subnuclear domains. Interacts with MBD4. Interacts with EXO1. Defects in MLH1 are the cause of hereditary non-polyposis colorectal cancer type 2; Turcot syndrome, an autosomal dominant disorder characterized by malignant tumors of the brain; Muir-Torre syndrome (MTS), a rare autosomal dominant disorder characterized by sebaceous neoplasms and visceral malignancy; lobular carcinoma in situ; endometrial cancer; and non-polyposis colorectal cancer. Note: This description may include information from UniProtKB.
Protein type: Cell cycle regulation; DNA repair, damage; Tumor suppressor