Is AP3D1 p.Ala660= (c.1980G>A) pathogenic?

AP3D1 p.Ala660= (c.1980G>A) is classified Benign/Likely benign in AP3D1 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-02-16). Ultra-rare (popmax 0.0338%, sas).

How common is AP3D1 p.Ala660= (c.1980G>A) in the general population?

AP3D1 p.Ala660= (c.1980G>A) is ultra-rare (popmax 0.0338%, sas) (gnomAD).

AP3D1 p.Ala660=

c.1980G>A · rs371826693 · VCV1903327

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0338%, sas)

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 -9.1	GERP -3.1
Overall
CADD	0.656	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0338% South Asian · 30/88,824 alleles

Filtering AF 0.0243% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.021%

Overall 0.00294% 47/1,598,488 alleles · ultra-rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0338%	2,961
Remaining individualsnot grpmax-eligible	0.00973%	10,280
European (non-Finnish)	0.000938%	106,656

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: AP3D1
Protein: p.Ala660=
Coding: c.1980G>A
MANE Select: NM_001261826
dbSNP: rs371826693
Type: single nucleotide variant
Location: chr19:2116626 (GRCh38)
Gene constraint: LOEUF 0.443 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 76.45 · 6 PDB
Residue 660: the 'disordered' region

Full AP3D1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

AP3D1 p.Ala660Val Uncertain significance ★ ⚠ same residue
AP3D1 c.2001+6C>T Uncertain significance ★★ same type
AP3D1 c.2601+6G>T Uncertain significance ★★ same type
AP3D1 c.856+3G>A Uncertain significance ★★ same type
AP3D1 p.Ala1076Val Uncertain significance ★★ ⚠ same type
AP3D1 p.Ala1093Val Uncertain significance ★★ ⚠ same type
AP3D1 p.Ala1148Val Uncertain significance ★★ ⚠ same type
AP3D1 p.Ala1213Thr 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/ap3d1-p-ala660 (accessed [today's date]).

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