Is CD44 p.Ser226Asn (c.677G>A) pathogenic?

CD44 p.Ser226Asn (c.677G>A) is classified Uncertain significance in CD44 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-08). AlphaMissense: likely benign (0.1135); Absent from gnomAD v4.1.

How common is CD44 p.Ser226Asn (c.677G>A) in the general population?

CD44 p.Ser226Asn (c.677G>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CD44 p.Ser226Asn (c.677G>A)?

AlphaMissense predicts likely benign (score 0.1135) — an in-silico prediction, not a clinical call.

CD44 p.Ser226Asn

c.677G>A · VCV4222923

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1135 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1135	likely benign
REVEL	0.076	moderately benign-leaning
SaProt	LLR -8.01	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.6	GERP -0.71, phastCons 0.1
Regional constraint	o/e 0.78	unconstrained · MANE · 58 kb · p 7.9e-05 · regional, not allelic
Overall
CADD	14.53	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — 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: CD44
Protein: p.Ser226Asn
Coding: c.677G>A
MANE Select: NM_000610
Type: single nucleotide variant
Location: chr11:35196755 (GRCh38)
Gene constraint: LOEUF 0.654 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 53.31 · 7 PDB
Residue 226: the 'stem' region

Full CD44 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CD44 c.367+7T>C Benign ★★ same type
CD44 p.Arg463Gln Benign ★★ same type
CD44 p.Arg673Gln Likely benign ★★ ⚠ same type
CD44 p.Gly462= Benign ★★ same type
CD44 p.Ile457Val Benign ★★ same type
CD44 p.Phe245= Benign ★★ same type
CD44 p.Thr163= Benign ★★ same type
CD44 p.Thr393Met Benign ★★ ⚠ same type

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/cd44-p-ser226asn (accessed [today's date]).

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