MUS81
MUS81: A Critical Factor in DNA Repair and Cancer Development
Description
MUS81 is a member of the nuclease superfamily, a group of enzymes that play pivotal roles in nuclear DNA metabolism. Specifically, it is a structure-specific endonuclease that cleaves Holliday junctions, four-stranded DNA structures formed during homologous recombination (HR), a vital process for DNA repair.
Associated Diseases
Mutations in the MUS81 gene have been linked to several human diseases, including:
- Fanconi Anemia (FA): FA is a rare genetic disorder characterized by bone marrow failure, congenital abnormalities, and an increased risk of developing acute myeloid leukemia (AML).
- Breast Cancer: Mutations in MUS81 have been associated with an increased risk of breast cancer, particularly among women who carry specific BRCA1 or BRCA2 mutations.
- Ovarian Cancer: Loss of MUS81 expression has been observed in ovarian cancer cells and has been linked to poor prognosis and resistance to chemotherapy.
- Colorectal Cancer: Mutations in MUS81 have been identified in some colorectal cancer patients and are associated with a worse prognosis.
Did you Know ?
Studies have shown that approximately 15% of BRCA1-associated breast cancers and 10% of BRCA2-associated breast cancers harbor MUS81 mutations.
