Is STS p.Val261Leu (c.781G>T) pathogenic?

STS p.Val261Leu (c.781G>T) is classified Uncertain significance in STS (ClinVar, Single submitter, 1 submitter; last evaluated 2025-06-22). AlphaMissense: likely benign (0.077); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with STS p.Val261Leu (c.781G>T)?

STS p.Val261Leu (c.781G>T) is associated with Inborn genetic diseases (ClinVar).

How common is STS p.Val261Leu (c.781G>T) in the general population?

STS p.Val261Leu (c.781G>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about STS p.Val261Leu (c.781G>T)?

AlphaMissense predicts likely benign (score 0.077) — an in-silico prediction, not a clinical call.

STS p.Val261Leu

c.781G>T · VCV4177196

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.077 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.077	likely benign
REVEL	0.202	benign-leaning
SaProt	LLR -5.30	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 0.06	GERP -0.89
Regional constraint	o/e 0.79	unconstrained · MANE · 72 kb · p 0.00048 · regional, not allelic
Overall
CADD	0.376	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM V266L vs ClinVar V261L) — verify the residue.

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: STS
Protein: p.Val261Leu
Coding: c.781G>T
MANE Select: NM_001320752
Type: single nucleotide variant
Location: chrX:7259747 (GRCh38)
Structure: AlphaFold pLDDT 94.31 · 2 PDB
Residue 261: an α-helix

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

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

STS p.Val261Ala Likely benign ★ same residue
STS p.Val261Met Likely benign ★ same residue
STS p.Arg381Ser Uncertain significance ★★ ⚠ same condition
STS p.Asp397Asn Uncertain significance ★★ ⚠ same condition
STS p.Arg578His Benign/Likely benign ★★ same condition
STS c.943+5G>A Conflicting classifications of pathogenicity ★ same condition
STS p.Ala295Val Uncertain significance ★ ⚠ same condition
STS p.Ala529Val Uncertain significance ★ ⚠ 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/sts-p-val261leu (accessed [today's date]).

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