Is ABCA8 p.Val1590Ile (c.4768G>A) pathogenic?

ABCA8 p.Val1590Ile (c.4768G>A) is classified Uncertain significance in ABCA8 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-11-08). AlphaMissense: likely benign (0.1268); Rare (popmax 0.428%, sas).

How common is ABCA8 p.Val1590Ile (c.4768G>A) in the general population?

ABCA8 p.Val1590Ile (c.4768G>A) is rare (popmax 0.428%, sas) (gnomAD).

What do computational predictors say about ABCA8 p.Val1590Ile (c.4768G>A)?

AlphaMissense predicts likely benign (score 0.1268) — an in-silico prediction, not a clinical call.

ABCA8 p.Val1590Ile

c.4768G>A · VCV4635994

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1268 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.428%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.1268	likely benign
REVEL	0.413	indeterminate
SaProt	LLR -9.46	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.31 · evaluated, not missing
Constraint at this position
Conservation	phyloP 1.7	phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 74 kb · p 0.82 · regional, not allelic
Overall
CADD	23.7	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 0.428% South Asian · 389/90,910 alleles

Filtering AF 0.393% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.379%

Overall 0.0375% 604/1,612,700 alleles · rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.428%	234
Middle Eastern	0.248%	403
Remaining individualsnot grpmax-eligible	0.0705%	1,419
Admixed American	0.0318%	3,147
European (non-Finnish)	0.0109%	9,142
African / African-American	0.00934%	10,709
Ashkenazi Jewishnot grpmax-eligible	0.00339%	29,538

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: ABCA8
Protein: p.Val1590Ile
Coding: c.4768G>A
MANE Select: NM_001288985
Type: single nucleotide variant
Location: chr17:68868183 (GRCh38)
Gene constraint: LOEUF 1.086 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.67
Residue 1590: a UniProt-annotated variant site (loss of expression; loss of cholesterol efflux to apoa1)

Full ABCA8 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ABCA8 p.Gly176Ser Uncertain significance ★★ ⚠ same type
ABCA8 c.4200-1G>C Benign ★★ same type
ABCA8 p.Gly1225Glu Benign ★★ same type
ABCA8 p.Ile542= Benign/Likely benign ★★ same type
ABCA8 p.Met251Ile Benign ★★ same type
ABCA8 c.3316-8G>T Uncertain significance ★ same type
ABCA8 p.Ala1109Val Uncertain significance ★ ⚠ same type
ABCA8 p.Ala1344Ser 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/abca8-p-val1590ile (accessed [today's date]).

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