Is BTBD2 p.Ala49Ser (c.145G>T) pathogenic?

BTBD2 p.Ala49Ser (c.145G>T) is classified Uncertain significance in BTBD2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-09-30). AlphaMissense: likely benign (0.1092); Absent from gnomAD v4.1.

How common is BTBD2 p.Ala49Ser (c.145G>T) in the general population?

BTBD2 p.Ala49Ser (c.145G>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BTBD2 p.Ala49Ser (c.145G>T)?

AlphaMissense predicts likely benign (score 0.1092) — an in-silico prediction, not a clinical call.

BTBD2 p.Ala49Ser

c.145G>T · VCV3482781

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1092 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1092	likely benign
REVEL	0.072	moderately benign-leaning
SaProt	LLR -10.67	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.65	GERP -1.3, phastCons 0.062
Regional constraint	o/e 1.01	unconstrained · MANE · 18 kb · p 0.86 · regional, not allelic
Overall
CADD	11.88	PHRED · no single calibrated threshold — expert panels disagree

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: BTBD2
Protein: p.Ala49Ser
Coding: c.145G>T
MANE Select: NM_017797
Type: single nucleotide variant
Location: chr19:2015559 (GRCh38)
Gene constraint: LOEUF 0.635 · pLI 0.28 (gnomAD)
Structure: AlphaFold pLDDT 84.82 · 1 PDB
Residue 49: the 'disordered' region

Full BTBD2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BTBD2 p.Ala201Ser Uncertain significance ★ ⚠ same type
BTBD2 p.Ala201Val Uncertain significance ★ ⚠ same type
BTBD2 p.Ala33Gly Uncertain significance ★ ⚠ same type
BTBD2 p.Ala37Val Uncertain significance ★ ⚠ same type
BTBD2 p.Ala3Thr Uncertain significance ★ ⚠ same type
BTBD2 p.Ala41Glu Uncertain significance ★ ⚠ same type
BTBD2 p.Ala42Ser Uncertain significance ★ ⚠ same type
BTBD2 p.Ala446Val 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/btbd2-p-ala49ser (accessed [today's date]).

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