Is CD2 p.Arg303His (c.908G>A) pathogenic?

CD2 p.Arg303His (c.908G>A) is classified Uncertain significance in CD2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-07-02). AlphaMissense: likely benign (0.1107); Very rare (popmax 0.00769%, sas).

How common is CD2 p.Arg303His (c.908G>A) in the general population?

CD2 p.Arg303His (c.908G>A) is very rare (popmax 0.00769%, sas) (gnomAD).

What do computational predictors say about CD2 p.Arg303His (c.908G>A)?

AlphaMissense predicts likely benign (score 0.1107) — an in-silico prediction, not a clinical call.

CD2 p.Arg303His

c.908G>A · VCV4222671

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1107 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00769%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.1107	likely benign
REVEL	0.303	indeterminate
SaProt	LLR -7.68	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3	GERP 0.025, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 14 kb · p 0.97 · regional, not allelic
Overall
CADD	18.89	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 0.00769% South Asian · 7/91,070 alleles

Filtering AF 0.00359% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00255%

Overall 0.00105% 17/1,613,902 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00769%	13,010
African / African-American	0.00668%	14,973
East Asian	0.00223%	44,868
Admixed American	0.00167%	59,992
Finnishnot grpmax-eligible	0.00156%	63,994
European (non-Finnish)	0.000169%	590,012

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: CD2
Protein: p.Arg303His
Coding: c.908G>A
MANE Select: NM_001767
Type: single nucleotide variant
Location: chr1:116768635 (GRCh38)
Gene constraint: LOEUF 1.143 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.25 · 7 PDB
Residue 303: the 'disordered' region

Full CD2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CD2 p.Arg303Cys Uncertain significance ★ ⚠ same residue
CD2 p.Ala270Thr Uncertain significance ★ ⚠ same type
CD2 p.Ala292Ser Uncertain significance ★ ⚠ same type
CD2 p.Ala342Thr Uncertain significance ★ ⚠ same type
CD2 p.Arg129Lys Uncertain significance ★ ⚠ same type
CD2 p.Arg129Trp Uncertain significance ★ ⚠ same type
CD2 p.Arg243Gln Uncertain significance ★ ⚠ same type
CD2 p.Arg243Leu 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/cd2-p-arg303his (accessed [today's date]).

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