Is OCA2 p.Ala776Asp (c.2327C>A) pathogenic?

OCA2 p.Ala776Asp (c.2327C>A) is classified Likely pathogenic in OCA2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-10-02). AlphaMissense: likely pathogenic (0.9665); Absent from gnomAD v4.1; Associated with SKIN/HAIR/EYE PIGMENTATION 1, BLUE/NONBLUE EYES.

What condition is associated with OCA2 p.Ala776Asp (c.2327C>A)?

OCA2 p.Ala776Asp (c.2327C>A) is associated with SKIN/HAIR/EYE PIGMENTATION 1, BLUE/NONBLUE EYES (ClinVar).

How common is OCA2 p.Ala776Asp (c.2327C>A) in the general population?

OCA2 p.Ala776Asp (c.2327C>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about OCA2 p.Ala776Asp (c.2327C>A)?

AlphaMissense predicts likely pathogenic (score 0.9665) — an in-silico prediction, not a clinical call.

OCA2 p.Ala776Asp

c.2327C>A · rs769370108 · VCV2677400

Likely pathogenic Single submitter

Classification

Likely pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9665 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

SKIN/HAIR/EYE PIGMENTATION 1, BLUE/NONBLUE EYES

Computational evidence

Protein change
AlphaMissense	0.9665	likely pathogenic ✓ concordant with ClinVar · top 6% in OCA2
REVEL	0.934	strongly pathogenic-leaning
SaProt	LLR -14.54	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 11	GERP 2, phastCons 1
Regional constraint	o/e 0.98	unconstrained · MANE · 326 kb · p 0.41 · regional, not allelic
Overall
CADD	28.2	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

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: OCA2
Protein: p.Ala776Asp
Coding: c.2327C>A
MANE Select: NM_000275
dbSNP: rs769370108
Type: single nucleotide variant
Location: chr15:27851393 (GRCh38)
Gene constraint: LOEUF 0.869 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 73.79

Full OCA2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

SKIN/HAIR/EYE PIGMENTATION 1, BLUE/NONBLUE EYES — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

OCA2 p.Ala776= Benign ★★ same residue
OCA2 c.1116+2T>C Likely pathogenic ★★ same condition
OCA2 c.1182+1G>A Pathogenic ★★ same condition
OCA2 c.2244+2T>G Pathogenic ★★ same condition
OCA2 c.2245-1G>A Likely pathogenic ★★ same condition
OCA2 c.2338+2T>G Pathogenic/Likely pathogenic ★★ same condition
OCA2 c.327-2A>G Likely pathogenic ★★ same condition
OCA2 c.808-3C>G Pathogenic ★★ 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/oca2-p-ala776asp (accessed [today's date]).

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