Is STAP1 p.Arg261Gln (c.782G>A) pathogenic?

STAP1 p.Arg261Gln (c.782G>A) is classified Uncertain significance in STAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-12-21). AlphaMissense: likely benign (0.0922); Very rare (popmax 0.00167%, amr).

How common is STAP1 p.Arg261Gln (c.782G>A) in the general population?

STAP1 p.Arg261Gln (c.782G>A) is very rare (popmax 0.00167%, amr) (gnomAD).

What do computational predictors say about STAP1 p.Arg261Gln (c.782G>A)?

AlphaMissense predicts likely benign (score 0.0922) — an in-silico prediction, not a clinical call.

STAP1 p.Arg261Gln

c.782G>A · rs756464771 · VCV2338414

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0922 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0922	likely benign
REVEL	0.036	moderately benign-leaning
SaProt	LLR -5.78	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	Δ0.22	donor loss · deltas
Constraint at this position
Conservation	phyloP 3.4	GERP 1.4, phastCons 1
Overall
CADD	20.3	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 0.00167% Admixed American · 1/59,926 alleles

Filtering AF 6.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.9e-05%

Overall 0.000372% 6/1,613,244 alleles · very rare exomes 5/1,461,112 · genomes 1/152,132 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	59,926
African / African-American	0.00134%	74,882
South Asian	0.0011%	90,902
European (non-Finnish)	0.000254%	393,224

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: STAP1
Protein: p.Arg261Gln
Coding: c.782G>A
MANE Select: NM_012108
dbSNP: rs756464771
Type: single nucleotide variant
Location: chr4:67593312 (GRCh38)
Structure: AlphaFold pLDDT 88.06

Full STAP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

STAP1 p.Gln192Arg Uncertain significance ★★ ⚠ same type
STAP1 p.Leu288Val Uncertain significance ★★ ⚠ same type
STAP1 c.120+6T>C Benign/Likely benign ★★ same type
STAP1 c.192+102T>C Likely benign ★★ same type
STAP1 c.192+10T>C Benign ★★ same type
STAP1 c.530+11A>G Benign ★★ same type
STAP1 c.530+60A>G Benign ★★ same type
STAP1 c.730-41G>C 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/stap1-p-arg261gln (accessed [today's date]).

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