Is PMS2 p.Arg199Ser (c.595C>A) pathogenic?

PMS2 p.Arg199Ser (c.595C>A) is classified Uncertain significance in PMS2 (ClinVar, Single submitter, 1 submitter; last evaluated 2020-06-18). AlphaMissense: likely pathogenic (0.7974); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with PMS2 p.Arg199Ser (c.595C>A)?

PMS2 p.Arg199Ser (c.595C>A) is associated with hereditary neoplastic syndrome (ClinVar).

How common is PMS2 p.Arg199Ser (c.595C>A) in the general population?

PMS2 p.Arg199Ser (c.595C>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about PMS2 p.Arg199Ser (c.595C>A)?

AlphaMissense predicts likely pathogenic (score 0.7974) — an in-silico prediction, not a clinical call.

PMS2 p.Arg199Ser

c.595C>A · rs372297364 · VCV1750717

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.7974 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.7974	likely pathogenic
REVEL	0.652	pathogenic-leaning
SaProt	LLR -12.14	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	phastCons 1
Regional constraint	o/e 1.09	unconstrained · MANE · 22 kb · p 0.015 · regional, not allelic
Overall
CADD	29.7	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

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: PMS2
Protein: p.Arg199Ser
Coding: c.595C>A
MANE Select: NM_000535
dbSNP: rs372297364
Type: single nucleotide variant
Location: chr7:5999218 (GRCh38)
Gene constraint: LOEUF 0.898 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 71.37 · 9 PDB
Residue 199: a β-strand

Full PMS2 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

PMS2 p.Arg199His Uncertain significance ★★ ⚠ same residue
PMS2 p.Arg199Leu Uncertain significance ★★ ⚠ same residue
PMS2 p.Arg199Pro Uncertain significance ★★ ⚠ same residue
PMS2 p.Arg199Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
PMS2 p.Arg199_Val200insTer Pathogenic ★★ same residue
PMS2 p.Arg199fs Pathogenic ★ same residue
PMS2 p.Arg199= Benign/Likely benign ★★ same residue
PMS2 c.163+2T>C 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/pms2-p-arg199ser (accessed [today's date]).

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