Is ATAD2B p.Ala50Asp (c.149C>A) pathogenic?

ATAD2B p.Ala50Asp (c.149C>A) is classified Uncertain significance in ATAD2B (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-08). AlphaMissense: likely benign (0.2795); Ultra-rare (popmax 0.0285%, afr).

How common is ATAD2B p.Ala50Asp (c.149C>A) in the general population?

ATAD2B p.Ala50Asp (c.149C>A) is ultra-rare (popmax 0.0285%, afr) (gnomAD).

What do computational predictors say about ATAD2B p.Ala50Asp (c.149C>A)?

AlphaMissense predicts likely benign (score 0.2795) — an in-silico prediction, not a clinical call.

ATAD2B p.Ala50Asp

c.149C>A · VCV4643656

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2795 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0285%, afr)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.2795	likely benign
REVEL	0.331	indeterminate
SaProt	LLR -8.02	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 9.2	GERP 1.5, phastCons 1
Regional constraint	o/e 1.02	unconstrained · MANE · 39 kb · p 0.77 · regional, not allelic
Overall
CADD	23.1	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 0.0285% African / African-American · 21/73,760 alleles

Filtering AF 0.019% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.016%

Overall 0.00153% 24/1,564,318 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0285%	3,512
Admixed American	0.00378%	26,442
Remaining individualsnot grpmax-eligible	0.00165%	60,614

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: ATAD2B
Protein: p.Ala50Asp
Coding: c.149C>A
MANE Select: NM_017552
Type: single nucleotide variant
Location: chr2:23926622 (GRCh38)
Gene constraint: LOEUF 0.376 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 60.47 · 6 PDB
Residue 50: the 'disordered' region

Full ATAD2B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ATAD2B p.Leu68= Benign ★★ same type
ATAD2B p.Ala1111Pro Uncertain significance ★ ⚠ same type
ATAD2B p.Ala1232Pro Uncertain significance ★ ⚠ same type
ATAD2B p.Ala1375Val Uncertain significance ★ ⚠ same type
ATAD2B p.Ala31Ser Uncertain significance ★ ⚠ same type
ATAD2B p.Ala692Val Uncertain significance ★ ⚠ same type
ATAD2B p.Ala975Thr Uncertain significance ★ ⚠ same type
ATAD2B p.Arg1085Gly 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/atad2b-p-ala50asp (accessed [today's date]).

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