Is ASAP1 p.Pro990Ala (c.2968C>G) pathogenic?

ASAP1 p.Pro990Ala (c.2968C>G) is classified Uncertain significance in ASAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-09-03). AlphaMissense: likely benign (0.2659); Ultra-rare (popmax 0.0521%, afr).

How common is ASAP1 p.Pro990Ala (c.2968C>G) in the general population?

ASAP1 p.Pro990Ala (c.2968C>G) is ultra-rare (popmax 0.0521%, afr) (gnomAD).

What do computational predictors say about ASAP1 p.Pro990Ala (c.2968C>G)?

AlphaMissense predicts likely benign (score 0.2659) — an in-silico prediction, not a clinical call.

ASAP1 p.Pro990Ala

c.2968C>G · VCV3433584

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2659 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0521%, afr)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2659	likely benign
REVEL	0.197	benign-leaning
SaProt	LLR -10.32	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2.5, phastCons 1
Regional constraint	o/e 1.06	unconstrained · MANE · 334 bp · p 0.49 · regional, not allelic
Overall
CADD	25.1	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0521% African / African-American · 39/74,874 alleles

Filtering AF 0.0392% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0346%

Overall 0.00254% 41/1,613,988 alleles · ultra-rare exomes 17/1,461,890 · genomes 24/152,098 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0521%	1,920
Remaining individualsnot grpmax-eligible	0.0032%	31,244

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: ASAP1
Protein: p.Pro990Ala
Coding: c.2968C>G
MANE Select: NM_018482
Type: single nucleotide variant
Location: chr8:130060803 (GRCh38)
Gene constraint: LOEUF 0.439 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 72.05 · 5 PDB
Residue 990: the 'disordered' region

Full ASAP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ASAP1 p.Gln263= Benign ★★ same type
ASAP1 p.Ala1035Gly Uncertain significance ★ ⚠ same type
ASAP1 p.Ala429Val Uncertain significance ★ ⚠ same type
ASAP1 p.Ala914Gly Uncertain significance ★ ⚠ same type
ASAP1 p.Arg212His Uncertain significance ★ ⚠ same type
ASAP1 p.Arg447Gln Uncertain significance ★ ⚠ same type
ASAP1 p.Arg710Ter Uncertain significance ★ same type
ASAP1 p.Arg764Gln 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/asap1-p-pro990ala (accessed [today's date]).

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