Is ERAP1 p.Ala228Ser (c.682G>T) pathogenic?

ERAP1 p.Ala228Ser (c.682G>T) is classified Uncertain significance in ERAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-10-19). AlphaMissense: likely benign (0.074); Very rare (popmax 0.00133%, afr).

How common is ERAP1 p.Ala228Ser (c.682G>T) in the general population?

ERAP1 p.Ala228Ser (c.682G>T) is very rare (popmax 0.00133%, afr) (gnomAD).

What do computational predictors say about ERAP1 p.Ala228Ser (c.682G>T)?

AlphaMissense predicts likely benign (score 0.074) — an in-silico prediction, not a clinical call.

ERAP1 p.Ala228Ser

c.682G>T · VCV3509733

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.074 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00133%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.074	likely benign
REVEL	0.016	strongly benign-leaning
SaProt	LLR -4.70	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 1.8	GERP -0.63, phastCons 1
Regional constraint	o/e 0.86	unconstrained · MANE · 10 kb · p 0.003 · regional, not allelic
Overall
CADD	16.44	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 0.00133% African / African-American · 1/74,920 alleles

Overall 0.000657% 1/152,176 alleles · very rare

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: ERAP1
Protein: p.Ala228Ser
Coding: c.682G>T
MANE Select: NM_001040458
Type: single nucleotide variant
Location: chr5:96797291 (GRCh38)
Gene constraint: LOEUF 0.947 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 92.78 · 27 PDB
Residue 228: a turn

Full ERAP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ERAP2 p.Ser228Arg Uncertain significance ★ ⚠ same residue
ERAP1 p.Ala356= Benign ★★ same type
ERAP1 p.Gly514Arg Benign/Likely benign ★★ same type
ERAP1 p.Ile915Thr Likely benign ★★ ⚠ same type
ERAP1 p.Ser18= Benign/Likely benign ★★ same type
ERAP1 p.Tyr57= Benign/Likely benign ★★ same type
ERAP1 p.Tyr789= Benign ★★ same type
ERAP2 p.Leu411Arg Benign/Likely 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/erap1-p-ala228ser (accessed [today's date]).

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