AP3B2 p.Ala776=
c.2328G>A · rs751290984 · VCV1643570
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00891%, eas)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP 0.75 | GERP -0.78, phastCons 0.017 |
| Overall | ||
| CADD | 10.96 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00891%
East Asian · 4/44,892 alleles
Filtering AF
0.00664%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00616%
Overall
0.00645%
104/1,612,758 alleles · very rare
exomes 97/1,460,542 · genomes 7/152,216 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| East Asiangrpmax | 0.00891% | 11,223 |
| European (non-Finnish) | 0.00797% | 12,552 |
| Remaining individualsnot grpmax-eligible | 0.0048% | 20,818 |
| African / African-American | 0.00267% | 37,459 |
| South Asian | 0.0011% | 91,078 |
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
- AP3B2
- Protein
- p.Ala776=
- Coding
- c.2328G>A
- MANE Select
- NM_001278512
- dbSNP
- rs751290984
- Type
- single nucleotide variant
- Location
- chr15:82663909 (GRCh38)
- Gene constraint
- LOEUF 0.52 · pLI 0.22 (gnomAD)
- Structure
- AlphaFold pLDDT 75.73
- Residue 776
- the 'disordered' region
Similar variants
- AP3B2 p.Ala776Val Uncertain significance ★ ⚠ same residue
- AP3B2 c.114-1G>A Likely pathogenic ★★ same type
- AP3B2 p.Arg977Ter Pathogenic ★★ same type
- AP3B2 p.Gln839Ter Pathogenic/Likely pathogenic ★★ same type
- AP3B2 c.1110+3G>C Uncertain significance ★★ same type
- AP3B2 c.1853-5C>A Uncertain significance ★★ same type
- AP3B2 c.2834-3C>A Uncertain significance ★★ same type
- AP3B2 p.Ala1076Pro 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/ap3b2-p-ala776 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown