Is DRD2 p.Ile431Thr (c.1292T>C) pathogenic?

DRD2 p.Ile431Thr (c.1292T>C) is classified Uncertain significance in DRD2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-03-12). AlphaMissense: likely benign (0.1193); Ultra-rare (popmax 0.0245%, eas); Associated with dystonic disorder.

What condition is associated with DRD2 p.Ile431Thr (c.1292T>C)?

DRD2 p.Ile431Thr (c.1292T>C) is associated with dystonic disorder (ClinVar).

How common is DRD2 p.Ile431Thr (c.1292T>C) in the general population?

DRD2 p.Ile431Thr (c.1292T>C) is ultra-rare (popmax 0.0245%, eas) (gnomAD).

What do computational predictors say about DRD2 p.Ile431Thr (c.1292T>C)?

AlphaMissense predicts likely benign (score 0.1193) — an in-silico prediction, not a clinical call.

DRD2 p.Ile431Thr

c.1292T>C · rs376186482 · VCV2891855

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1193 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0245%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

dystonic disorder

Computational evidence

Protein change
AlphaMissense	0.1193	likely benign
REVEL	0.267	benign-leaning
SaProt	LLR -4.52	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 6.2	GERP 0.33, phastCons 1
Regional constraint	o/e 0.49	unconstrained · MANE · 1,939 bp · p 3.2e-09 · regional, not allelic
Overall
CADD	20.8	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 0.0245% East Asian · 11/44,886 alleles

Filtering AF 0.0137% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0106%

Overall 0.0052% 84/1,614,200 alleles · ultra-rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0245%	4,081
South Asian	0.011%	9,109
Remaining individualsnot grpmax-eligible	0.0096%	10,418
European (non-Finnish)	0.00475%	21,072
African / African-American	0.00133%	75,046

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.Ile431Thr
Coding: c.1292T>C
MANE Select: NM_000795
dbSNP: rs376186482
Type: single nucleotide variant
Location: chr11:113410767 (GRCh38)
Gene constraint: LOEUF 0.372 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 72.49 · 11 PDB
Residue 431: an α-helix

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.Pro300His Uncertain significance ★★ ⚠ same condition
DRD2 c.1139-653A>C Benign ★★ same condition
DRD2 c.285+7G>A 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-ile431thr (accessed [today's date]).

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