Is CD247 p.Ala155Thr (c.463G>A) pathogenic?

CD247 p.Ala155Thr (c.463G>A) is classified Uncertain significance in CD247 (ClinVar, Single submitter, 1 submitter; last evaluated 2019-06-30). AlphaMissense: likely benign (0.1386); Very rare (popmax 0.00666%, afr); Associated with immunodeficiency 25.

What condition is associated with CD247 p.Ala155Thr (c.463G>A)?

CD247 p.Ala155Thr (c.463G>A) is associated with immunodeficiency 25 (ClinVar).

How common is CD247 p.Ala155Thr (c.463G>A) in the general population?

CD247 p.Ala155Thr (c.463G>A) is very rare (popmax 0.00666%, afr) (gnomAD).

What do computational predictors say about CD247 p.Ala155Thr (c.463G>A)?

AlphaMissense predicts likely benign (score 0.1386) — an in-silico prediction, not a clinical call.

CD247 p.Ala155Thr

Q: How is T-B+ severe combined immunodeficiency due to CD3delta/CD3epsilon/CD3zeta inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.463G>A · rs561262982 · VCV937736

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1386 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00666%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

immunodeficiency 25

Computational evidence

Protein change
AlphaMissense	0.1386	likely benign
REVEL	0.16	moderately benign-leaning
SaProt	LLR -5.75	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 7.7	GERP 2.5, phastCons 1
Regional constraint	o/e 0.91	unconstrained · MANE · 87 kb · p 0.18 · regional, not allelic
Overall
CADD	25.8	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

Grpmax group 0.00666% African / African-American · 5/75,022 alleles

Filtering AF 0.00255% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00198%

Overall 0.00304% 49/1,614,128 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00666%	15,004
South Asian	0.00549%	18,215
Remaining individualsnot grpmax-eligible	0.0032%	31,255
European (non-Finnish)	0.00305%	32,778
Admixed American	0.00167%	60,014

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: CD247
Protein: p.Ala155Thr
Coding: c.463G>A
MANE Select: NM_198053
dbSNP: rs561262982
Type: single nucleotide variant
Location: chr1:167431713 (GRCh38)
Gene constraint: LOEUF 0.633 · pLI 0.66 (gnomAD)
Structure: AlphaFold pLDDT 62.36 · 38 PDB
Residue 155: the itam 3 domain

Full CD247 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

immunodeficiency 25 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For T-B+ severe combined immunodeficiency due to CD3delta/CD3epsilon/CD3zeta (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy

Similar variants

CD247 p.Gln101Ter Pathogenic/Likely pathogenic ★★ same condition
CD247 c.58+6G>T Uncertain significance ★★ same condition
CD247 p.Ala120Val Uncertain significance ★★ ⚠ same condition
CD247 p.Ala63Pro Uncertain significance ★★ ⚠ same condition
CD247 p.Ala9Thr Uncertain significance ★★ ⚠ same condition
CD247 p.Arg103Lys Uncertain significance ★★ ⚠ same condition
CD247 p.Arg132Cys Uncertain significance ★★ ⚠ same condition
CD247 p.Arg132His Uncertain significance ★★ ⚠ 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/cd247-p-ala155thr (accessed [today's date]).

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