Human PMS1-dependent non-canonical mismatch repair engages with MBD4 to repair methylated CpG deamination
A newly identified DNA repair mechanism protects our cells from dangerous mutations caused by aging, suggesting new targets to slow age-related disease.
PMS1 physically interacts with MBD4 and is required for non-canonical MMR (MutLβ/MutSα) repair of 5-methylcytosine deamination; PMS1 deficiency phenocopies MBD4-loss CpG>TpG hypermutation signature; establishes PMS1 as a key guardian of the methylated genome against aging-associated mutation accumulation. This record was retained from the prior triage attempt for PubMed pipeline handoff.
What the study was
- Study design
- in_vitro_mechanistic
- Category
- aging_longevity
- Maturity
- Exploratory
- Journal
- Nucleic Acids Research
Why it surfaced
Mechanistically novel: establishes PMS1 as a critical component of the 5mC deamination repair pathway, a mechanism directly linked to aging-associated mutation accumulation and cancer evolution. Published in Nucleic Acids Research with rigorous experimental design. Highly relevant to tumor mutational signature biology and MMR-deficiency cancer genetics.
A plain-language summary of published research — not medical advice. Talk to a clinician about your own care.