Is BST1 p.Ala175Ser (c.523G>T) pathogenic?

BST1 p.Ala175Ser (c.523G>T) is classified Uncertain significance in BST1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-04-12). AlphaMissense: likely benign (0.2272); Absent from gnomAD v4.1.

How common is BST1 p.Ala175Ser (c.523G>T) in the general population?

BST1 p.Ala175Ser (c.523G>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BST1 p.Ala175Ser (c.523G>T)?

AlphaMissense predicts likely benign (score 0.2272) — an in-silico prediction, not a clinical call.

BST1 p.Ala175Ser

c.523G>T · VCV3993387

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2272 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2272	likely benign
REVEL	0.271	benign-leaning
SaProt	LLR -8.10	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 4.9	GERP -0.092, phastCons 0.99
Regional constraint	o/e 1.07	unconstrained · MANE · 29 kb · p 0.17 · regional, not allelic
Overall
CADD	22.7	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

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: BST1
Protein: p.Ala175Ser
Coding: c.523G>T
MANE Select: NM_004334
Type: single nucleotide variant
Location: chr4:15711878 (GRCh38)
Gene constraint: LOEUF 1.638 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 90.33 · 6 PDB
Residue 175: an α-helix

Full BST1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BST1 p.Ala175Thr Uncertain significance ★ ⚠ same residue
BST1 p.Arg145= Benign ★★ same type
BST1 p.Gly239Arg Benign ★★ same type
BST1 p.Ile101Val Benign ★★ same type
BST1 p.Ala120Thr Uncertain significance ★ ⚠ same type
BST1 p.Ala27Val Uncertain significance ★ ⚠ same type
BST1 p.Ala2Thr Uncertain significance ★ ⚠ same type
BST1 p.Ala30Thr Uncertain significance ★ ⚠ 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/bst1-p-ala175ser (accessed [today's date]).

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