Is BRIX1 p.Pro50His (c.149C>A) pathogenic?

BRIX1 p.Pro50His (c.149C>A) is classified Uncertain significance in BRIX1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-02). AlphaMissense: likely benign (0.2689); Ultra-rare (popmax 0.0296%, amr).

How common is BRIX1 p.Pro50His (c.149C>A) in the general population?

BRIX1 p.Pro50His (c.149C>A) is ultra-rare (popmax 0.0296%, amr) (gnomAD).

What do computational predictors say about BRIX1 p.Pro50His (c.149C>A)?

AlphaMissense predicts likely benign (score 0.2689) — an in-silico prediction, not a clinical call.

BRIX1 p.Pro50His

c.149C>A · VCV4646694

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2689 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0296%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2689	likely benign
REVEL	0.09	moderately benign-leaning
SaProt	LLR -7.67	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 7.6	GERP 1.9, phastCons 1
Regional constraint	o/e 0.97	unconstrained · MANE · 9,753 bp · p 0.54 · regional, not allelic
Overall
CADD	28.4	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 0.0296% Admixed American · 15/50,662 alleles

Filtering AF 0.0182% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0147%

Overall 0.000965% 15/1,555,106 alleles · ultra-rare exomes 15/1,402,890 · genomes 0/152,216 · joint denominator

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: BRIX1
Protein: p.Pro50His
Coding: c.149C>A
MANE Select: NM_018321
Type: single nucleotide variant
Location: chr5:34915887 (GRCh38)
Gene constraint: LOEUF 0.626 · pLI 0.80 (gnomAD)
Structure: AlphaFold pLDDT 81.68 · 10 PDB

Full BRIX1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BRIX1 p.Ala120Val Uncertain significance ★ ⚠ same type
BRIX1 p.Ala26Gly Uncertain significance ★ ⚠ same type
BRIX1 p.Ala34Ser Uncertain significance ★ ⚠ same type
BRIX1 p.Ala36Glu Uncertain significance ★ ⚠ same type
BRIX1 p.Ala3Val Uncertain significance ★ ⚠ same type
BRIX1 p.Arg218Trp Uncertain significance ★ ⚠ same type
BRIX1 p.Arg267Leu Uncertain significance ★ ⚠ same type
BRIX1 p.Arg270Ile 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/brix1-p-pro50his (accessed [today's date]).

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