OnCo

MSH3 (DNA mismatch repair protein Msh3) is a gene. The public catalogues list it as a drug target, a biomarker and a DNA repair gene, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Endometrial cancer and Colorectal cancer. This dossier gathers the 0 products (0 approved), 0 trials, 0 pathways and 0 resistance routes in the corpus that involve it, with external identifiers so it can be joined to UniProt, ChEMBL, Open Targets and the rest of biology.

Biology

Component of the post-replicative DNA mismatch repair system (MMR). Heterodimerises with MSH2 to form MutS beta which binds to DNA mismatches thereby initiating DNA repair. When bound, the MutS beta heterodimer bends the DNA helix and shields approximately 20 base pairs. MutS beta recognises large insertion-deletion loops (IDL) up to 13 nucleotides long. After mismatch binding, forms a ternary complex with the MutL alpha heterodimer, which is thought to be responsible for directing the downstream MMR events, including strand discrimination, excision, and resynthesis. Locus 5q14.1 (HGNC).

Where it is found
  • Endometrial cancer: Open Targets association 0.69 with endometrial cancer (MONDO_0011962)
  • Colorectal cancer: CIViC evidence names this disease
Class: other · Gene: MSH3 · Facts checked 2026-09-23 · Target page

External identifiers

Built from HGNC, Ensembl, UniProt and ChEMBL ids

Products by modality and phase

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Resistance routes

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No pathway diagram carries this target as a node.

Companion diagnostics

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Preclinical models

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Literature

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Query for this target: (TITLE:"MSH3" OR ABSTRACT:"MSH3" OR TITLE:"mutS homolog 3" OR ABSTRACT:"mutS homolog 3" OR TITLE:"DNA mismatch repair protein Msh3" OR ABSTRACT:"DNA mismatch repair protein Msh3" OR TITLE:"MRP1" OR ABSTRACT:"MRP1") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about MSH3, not a curated reading list.

Export

The dossier as machine-readable JSON: identifiers from HGNC, Ensembl, UniProt and ChEMBL, products with status, trials, pathways, hotspots, open questions and assays. The full entity record is in the open API at /api/v1/entities/msh3.json. Licence CC BY-NC 4.0.