Is BRD4 p.Ala276Val (c.827C>T) pathogenic?

BRD4 p.Ala276Val (c.827C>T) is classified Uncertain significance in BRD4 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-03-11). AlphaMissense: likely benign (0.1269); Ultra-rare (popmax 0.0157%, amr).

How common is BRD4 p.Ala276Val (c.827C>T) in the general population?

BRD4 p.Ala276Val (c.827C>T) is ultra-rare (popmax 0.0157%, amr) (gnomAD).

What do computational predictors say about BRD4 p.Ala276Val (c.827C>T)?

AlphaMissense predicts likely benign (score 0.1269) — an in-silico prediction, not a clinical call.

BRD4 p.Ala276Val

c.827C>T · rs1348283029 · VCV1978628

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1269 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0157%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1269	likely benign
REVEL	0.079	moderately benign-leaning
SaProt	LLR -6.69	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 12	GERP 2.4, phastCons 1
Regional constraint	o/e 1.06	unconstrained · MANE · 279 bp · p 0.47 · regional, not allelic
Overall
CADD	21.3	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 0.0157% Admixed American · 7/44,718 alleles

Filtering AF 0.00728% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00516%

Overall 0.000924% 14/1,514,800 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0157%	6,388
South Asian	0.00536%	18,640
East Asian	0.00228%	43,800
European (non-Finnish)	0.000176%	567,241

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: BRD4
Protein: p.Ala276Val
Coding: c.827C>T
MANE Select: NM_001379291
dbSNP: rs1348283029
Type: single nucleotide variant
Location: chr19:15265376 (GRCh38)
Gene constraint: LOEUF 0.191 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 56.20 · 613 PDB
Residue 276: the 'disordered' region; a UniProt-annotated variant site (found in a patient with a neurodevelopmental syndrome; likely pathogenic)

Full BRD4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BRD4 p.Tyr430Cys Likely pathogenic ★★ same type
BRD4 p.Ala220Thr Uncertain significance ★★ ⚠ same type
BRD4 p.Ala409Thr Uncertain significance ★★ ⚠ same type
BRD4 p.Ala565Val Uncertain significance ★★ ⚠ same type
BRD4 p.Asp337Asn Uncertain significance ★★ ⚠ same type
BRD4 p.Asp497Gly Uncertain significance ★★ ⚠ same type
BRD4 p.Gln32Arg Uncertain significance ★★ ⚠ same type
BRD4 p.Glu1123Lys 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/brd4-p-ala276val (accessed [today's date]).

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