Is CD276 p.Arg345Trp (c.1033C>T) pathogenic?

CD276 p.Arg345Trp (c.1033C>T) is classified Uncertain significance in CD276 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-01-23). AlphaMissense: likely benign (0.0992); Ultra-rare (popmax 0.0107%, afr).

How common is CD276 p.Arg345Trp (c.1033C>T) in the general population?

CD276 p.Arg345Trp (c.1033C>T) is ultra-rare (popmax 0.0107%, afr) (gnomAD).

What do computational predictors say about CD276 p.Arg345Trp (c.1033C>T)?

AlphaMissense predicts likely benign (score 0.0992) — an in-silico prediction, not a clinical call.

CD276 p.Arg345Trp

c.1033C>T · rs754336923 · VCV3140480

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0992 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0107%, afr)

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.0992	likely benign
REVEL	0.326	indeterminate
SaProt	LLR -14.67	damaging
⇒ SaProt calls this damaging; AlphaMissense does not; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.032	GERP 1.4
Regional constraint	o/e 0.88	unconstrained · MANE · 13 kb · p 0.0018 · regional, not allelic
Overall
CADD	26.6	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0107% African / African-American · 8/74,946 alleles

Filtering AF 0.00528% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0038%

Overall 0.00199% 32/1,612,072 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0107%	9,368
Admixed American	0.00667%	14,996
Remaining individualsnot grpmax-eligible	0.0032%	31,219
European (non-Finnish)	0.00153%	65,545

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: CD276
Protein: p.Arg345Trp
Coding: c.1033C>T
MANE Select: NM_001024736
dbSNP: rs754336923
Type: single nucleotide variant
Location: chr15:73703958 (GRCh38)
Gene constraint: LOEUF 0.888 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 83.63 · 3 PDB
Residue 345: the ig-like v-type 2 domain

Full CD276 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CD276 p.Leu419= Benign ★★ same type
CD276 p.Ala132Ser Uncertain significance ★ ⚠ same type
CD276 p.Ala139Ser Uncertain significance ★ ⚠ same type
CD276 p.Ala28Ser Uncertain significance ★ ⚠ same type
CD276 p.Ala312Thr Uncertain significance ★ ⚠ same type
CD276 p.Ala350Thr Uncertain significance ★ ⚠ same type
CD276 p.Ala351Val Uncertain significance ★ ⚠ same type
CD276 p.Ala432Gly Uncertain significance ★ ⚠ 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/cd276-p-arg345trp (accessed [today's date]).

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