Is STAP1 p.Val128Met (c.382G>A) pathogenic?

STAP1 p.Val128Met (c.382G>A) is classified Uncertain significance in STAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-05-30). AlphaMissense: likely benign (0.1132); Very rare (popmax 0.00552%, sas).

How common is STAP1 p.Val128Met (c.382G>A) in the general population?

STAP1 p.Val128Met (c.382G>A) is very rare (popmax 0.00552%, sas) (gnomAD).

What do computational predictors say about STAP1 p.Val128Met (c.382G>A)?

AlphaMissense predicts likely benign (score 0.1132) — an in-silico prediction, not a clinical call.

STAP1 p.Val128Met

c.382G>A · VCV3323079

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1132 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00552%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1132	likely benign
REVEL	0.013	strongly benign-leaning
SaProt	LLR -5.32	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 4.8	GERP -0.89, phastCons 1
Overall
CADD	18.22	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 0.00552% South Asian · 5/90,594 alleles

Filtering AF 0.00211% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00137%

Overall 0.000496% 8/1,612,334 alleles · very rare exomes 6/1,460,110 · genomes 2/152,224 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00552%	18,119
African / African-American	0.004%	24,975

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.Val128Met
Coding: c.382G>A
MANE Select: NM_012108
Type: single nucleotide variant
Location: chr4:67581323 (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-val128met (accessed [today's date]).

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