Is ABCA8 p.Ser263Leu (c.788C>T) pathogenic?

ABCA8 p.Ser263Leu (c.788C>T) is classified Uncertain significance in ABCA8 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-11). AlphaMissense: likely benign (0.0831); Very rare (popmax 0.0044%, sas).

How common is ABCA8 p.Ser263Leu (c.788C>T) in the general population?

ABCA8 p.Ser263Leu (c.788C>T) is very rare (popmax 0.0044%, sas) (gnomAD).

What do computational predictors say about ABCA8 p.Ser263Leu (c.788C>T)?

AlphaMissense predicts likely benign (score 0.0831) — an in-silico prediction, not a clinical call.

ABCA8 p.Ser263Leu

c.788C>T · VCV4092410

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0831 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0044%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.0831	likely benign
REVEL	0.291	indeterminate
SaProt	LLR -7.81	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.4	GERP 0.41, phastCons 0.55
Regional constraint	o/e 1.01	unconstrained · MANE · 74 kb · p 0.82 · regional, not allelic
Overall
CADD	14.38	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 0.0044% South Asian · 4/90,964 alleles

Filtering AF 0.00224% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00199%

Overall 0.00248% 40/1,610,508 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0044%	22,741
European (non-Finnish)	0.00306%	32,702

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.Ser263Leu
Coding: c.788C>T
MANE Select: NM_001288985
Type: single nucleotide variant
Location: chr17:68932297 (GRCh38)
Gene constraint: LOEUF 1.086 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.67

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-ser263leu (accessed [today's date]).

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