Is BCAS4 p.His15Pro (c.44A>C) pathogenic?

BCAS4 p.His15Pro (c.44A>C) is classified Uncertain significance in BCAS4 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-09-21). AlphaMissense: likely benign (0.0569); Very rare (popmax 0.00237%, amr).

How common is BCAS4 p.His15Pro (c.44A>C) in the general population?

BCAS4 p.His15Pro (c.44A>C) is very rare (popmax 0.00237%, amr) (gnomAD).

What do computational predictors say about BCAS4 p.His15Pro (c.44A>C)?

AlphaMissense predicts likely benign (score 0.0569) — an in-silico prediction, not a clinical call.

BCAS4 p.His15Pro

c.44A>C · VCV4645415

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0569 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00237%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0569	likely benign
REVEL	0.034	moderately benign-leaning
SaProt	LLR -3.29	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 -0.81	GERP -3.2
Overall
CADD	2.955	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 0.00237% Admixed American · 1/42,168 alleles

Filtering AF 0.0012% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000972%

Overall 0.00163% 21/1,285,794 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00237%	42,168
European (non-Finnish)	0.00183%	54,588

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: BCAS4
Protein: p.His15Pro
Coding: c.44A>C
MANE Select: NM_198799 · reported on NM_017843
Type: single nucleotide variant
Location: chr20:50795037 (GRCh38)
Gene constraint: LOEUF 1.081 · pLI 0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.40
Residue 15: the 'disordered' region

Full BCAS4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BCAS4 p.Gly15Arg Uncertain significance ★ ⚠ same residue
BCAS4 p.Ser130Thr Benign ★★ same type
BCAS4 p.Ser130Tyr Benign/Likely benign ★★ ⚠ same type
BCAS4 p.Thr142Met Likely benign ★★ same type
BCAS4 c.-15C>T Uncertain significance ★ ⚠ same type
BCAS4 c.-6C>T Uncertain significance ★ ⚠ same type
BCAS4 p.Ala118Ser Uncertain significance ★ ⚠ same type
BCAS4 p.Ala126Thr 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/bcas4-p-his15pro (accessed [today's date]).

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