Is PMS2 p.Ser158= (c.474C>T) pathogenic?

PMS2 p.Ser158= (c.474C>T) is classified Benign/Likely benign in PMS2 (ClinVar, Multiple submitters, 6 submitters; last evaluated 2025-11-19). Very rare (popmax 0.00834%, amr); Associated with Hereditary nonpolyposis colorectal neoplasms.

How common is PMS2 p.Ser158= (c.474C>T) in the general population?

PMS2 p.Ser158= (c.474C>T) is very rare (popmax 0.00834%, amr) (gnomAD).

PMS2 p.Ser158=

Q: What condition is associated with PMS2 p.Ser158= (c.474C>T)?

PMS2 p.Ser158= (c.474C>T) is associated with Hereditary nonpolyposis colorectal neoplasms, Lynch syndrome, Lynch syndrome 4 (ClinVar).

c.474C>T · rs767414243 · VCV416569

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00834%, amr)

Conditions

Hereditary nonpolyposis colorectal neoplasms

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -8
Overall
CADD	0.113	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00834% Admixed American · 5/59,984 alleles

Filtering AF 0.00323% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00207%

Overall 0.000497% 8/1,611,262 alleles · very rare exomes 6/1,459,114 · genomes 2/152,148 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00834%	11,997
South Asian	0.0022%	45,484
European (non-Finnish)	8.48e-05%	1,179,370

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: PMS2
Protein: p.Ser158=
Coding: c.474C>T
MANE Select: NM_000535
dbSNP: rs767414243
Type: single nucleotide variant
Location: chr7:6002516 (GRCh38)
Gene constraint: LOEUF 0.898 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 71.37 · 9 PDB
Residue 158: a β-strand

Full PMS2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Hereditary nonpolyposis colorectal neoplasms — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Lynch syndrome Lynch syndrome 4 hereditary neoplastic syndrome

Similar variants

PMS2 p.Ser158Asn Uncertain significance ★★ ⚠ same residue
PMS2 p.Ser158Cys Uncertain significance ★★ ⚠ same residue
PMS2 p.Ser158Gly Uncertain significance ★★ ⚠ same residue
PMS2 p.Ser158Ile Uncertain significance ★★ ⚠ same residue
PMS2 p.Ser158Arg Uncertain significance ★ ⚠ same residue
PMS2 c.1144+2T>A Likely pathogenic ★★★ same condition
PMS2 c.163+2T>C Likely pathogenic ★★★ same condition
PMS2 c.164-2A>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/pms2-p-ser158 (accessed [today's date]).

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