Is BACE2 p.Ala75Thr (c.223G>A) pathogenic?

BACE2 p.Ala75Thr (c.223G>A) is classified Uncertain significance in BACE2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-03-19). AlphaMissense: likely benign (0.0845); Very rare (popmax 0.00561%, sas).

How common is BACE2 p.Ala75Thr (c.223G>A) in the general population?

BACE2 p.Ala75Thr (c.223G>A) is very rare (popmax 0.00561%, sas) (gnomAD).

What do computational predictors say about BACE2 p.Ala75Thr (c.223G>A)?

AlphaMissense predicts likely benign (score 0.0845) — an in-silico prediction, not a clinical call.

BACE2 p.Ala75Thr

c.223G>A · VCV3259789

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0845 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00561%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0845	likely benign
REVEL	0.073	moderately benign-leaning
SaProt	LLR -6.94	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 6.9	GERP 1.1, phastCons 1
Regional constraint	o/e 0.95	unconstrained · MANE · 69 kb · p 0.41 · regional, not allelic
Overall
CADD	22.3	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 0.00561% South Asian · 3/53,500 alleles

Filtering AF 0.00149% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000812%

Overall 0.000653% 9/1,377,580 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00561%	17,833
Remaining individualsnot grpmax-eligible	0.00199%	50,360
European (non-Finnish)	0.000472%	212,080

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: BACE2
Protein: p.Ala75Thr
Coding: c.223G>A
MANE Select: NM_012105
Type: single nucleotide variant
Location: chr21:41168486 (GRCh38)
Gene constraint: LOEUF 0.574 · pLI 0.73 (gnomAD)
Structure: AlphaFold pLDDT 83.31 · 19 PDB

Full BACE2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BACE2 c.1135-10C>T Benign ★★ same type
BACE2 c.1304-8C>T Benign ★★ same type
BACE2 p.His56Tyr Benign ★★ same type
BACE2 p.Ser88= Likely benign ★★ same type
BACE2 p.Ala200Gly Uncertain significance ★ ⚠ same type
BACE2 p.Ala25Val Uncertain significance ★ ⚠ same type
BACE2 p.Ala297Thr Uncertain significance ★ ⚠ same type
BACE2 p.Ala36Thr 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/bace2-p-ala75thr (accessed [today's date]).

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