Is DRD2 p.Ala177Thr (c.529G>A) pathogenic?

DRD2 p.Ala177Thr (c.529G>A) is classified Uncertain significance in DRD2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-12-04). AlphaMissense: likely benign (0.0545); Ultra-rare (popmax 0.0546%, afr); Associated with dystonic disorder.

What condition is associated with DRD2 p.Ala177Thr (c.529G>A)?

DRD2 p.Ala177Thr (c.529G>A) is associated with dystonic disorder (ClinVar).

How common is DRD2 p.Ala177Thr (c.529G>A) in the general population?

DRD2 p.Ala177Thr (c.529G>A) is ultra-rare (popmax 0.0546%, afr) (gnomAD).

What do computational predictors say about DRD2 p.Ala177Thr (c.529G>A)?

AlphaMissense predicts likely benign (score 0.0545) — an in-silico prediction, not a clinical call.

DRD2 p.Ala177Thr

c.529G>A · VCV3635926

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0545 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0546%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

dystonic disorder

Computational evidence

Protein change
AlphaMissense	0.0545	likely benign
REVEL	0.079	moderately benign-leaning
SaProt	LLR -6.11	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 0.69	GERP -0.93, phastCons 1
Regional constraint	o/e 0.64	unconstrained · MANE · 9,057 bp · p 6.7e-09 · regional, not allelic
Overall
CADD	8.411	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 0.0546% African / African-American · 41/75,054 alleles

Filtering AF 0.0413% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0367%

Overall 0.00347% 56/1,613,844 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0546%	1,831
Middle Eastern	0.0165%	6,060
Admixed American	0.00667%	15,000
Remaining individualsnot grpmax-eligible	0.0064%	15,623
South Asian	0.0011%	90,968
European (non-Finnish)	0.000424%	235,976

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: DRD2
Protein: p.Ala177Thr
Coding: c.529G>A
MANE Select: NM_000795
Type: single nucleotide variant
Location: chr11:113416866 (GRCh38)
Gene constraint: LOEUF 0.372 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 72.49 · 11 PDB
Residue 177: a disulfide bond

Full DRD2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

dystonic disorder — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

DRD2 p.Arg274Gln Uncertain significance ★★ ⚠ same condition
DRD2 p.Gln366Lys Uncertain significance ★★ ⚠ same condition
DRD2 p.Glu99Lys Uncertain significance ★★ ⚠ same condition
DRD2 p.Gly261Arg Uncertain significance ★★ ⚠ same condition
DRD2 p.His316Pro Uncertain significance ★★ ⚠ same condition
DRD2 p.Ile431Thr Uncertain significance ★★ ⚠ same condition
DRD2 p.Pro300His Uncertain significance ★★ ⚠ same condition
DRD2 c.1139-653A>C Benign ★★ 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/drd2-p-ala177thr (accessed [today's date]).

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