Is MSH6 p.Arg26= (c.76A>C) pathogenic?

MSH6 p.Arg26= (c.76A>C) is classified Likely benign in MSH6 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-09-13). Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with MSH6 p.Arg26= (c.76A>C)?

MSH6 p.Arg26= (c.76A>C) is associated with hereditary neoplastic syndrome (ClinVar).

How common is MSH6 p.Arg26= (c.76A>C) in the general population?

MSH6 p.Arg26= (c.76A>C) is absent from gnomAD v4.1 (gnomAD).

MSH6 p.Arg26=

c.76A>C · rs757622849 · VCV2587371

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.1	GERP -2.8, phastCons 0.04
Overall
CADD	6.298	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: MSH6
Protein: p.Arg26=
Coding: c.76A>C
MANE Select: NM_000179
dbSNP: rs757622849
Type: single nucleotide variant
Location: chr2:47783309 (GRCh38)
Gene constraint: LOEUF 0.841 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 77.93 · 8 PDB
Residue 26: the 'disordered' region

Full MSH6 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

MSH6 p.Arg26Ser Uncertain significance ★★ ⚠ same residue
MSH6 p.Arg26Gly Conflicting classifications of pathogenicity ★ ⚠ same residue
MSH6 p.Arg26Lys Uncertain significance ★ ⚠ same residue
MSH6 p.Arg26Thr Conflicting classifications of pathogenicity ★ ⚠ same residue
MSH6 c.3172+1G>T Likely pathogenic ★★★ same condition
MSH6 c.3438+1G>A Likely pathogenic ★★★ same condition
MSH6 c.3439-1G>T Likely pathogenic ★★★ same condition
MSH6 c.3439-2A>G Likely pathogenic ★★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/msh6-p-arg26 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown