Is APOB p.Gly480Val (c.1439G>T) pathogenic?

APOB p.Gly480Val (c.1439G>T) is classified Uncertain significance in APOB (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-05-08). AlphaMissense: likely benign (0.1982); Very rare (popmax 8.48e-05%, nfe); Associated with familial hypobetalipoproteinemia 1.

What condition is associated with APOB p.Gly480Val (c.1439G>T)?

APOB p.Gly480Val (c.1439G>T) is associated with familial hypobetalipoproteinemia 1, hypercholesterolemia, autosomal dominant, type B (ClinVar).

How common is APOB p.Gly480Val (c.1439G>T) in the general population?

APOB p.Gly480Val (c.1439G>T) is very rare (popmax 8.48e-05%, nfe) (gnomAD).

What do computational predictors say about APOB p.Gly480Val (c.1439G>T)?

AlphaMissense predicts likely benign (score 0.1982) — an in-silico prediction, not a clinical call.

APOB p.Gly480Val

c.1439G>T · rs2465426330 · VCV2940450

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1982 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.48e-05%, nfe)

Conditions

familial hypobetalipoproteinemia 1

Computational evidence

Protein change
AlphaMissense	0.1982	likely benign
REVEL	0.303	indeterminate
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6	GERP 1.5, phastCons 0.98
Regional constraint	o/e 1.00	unconstrained · MANE · 32 kb · p 0.91 · regional, not allelic
Overall
CADD	25.0	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 8.48e-05% European (non-Finnish) · 1/1,179,774 alleles

Overall 6.84e-05% 1/1,461,564 alleles · very rare

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: APOB
Protein: p.Gly480Val
Coding: c.1439G>T
MANE Select: NM_000384
dbSNP: rs2465426330
Type: single nucleotide variant
Location: chr2:21029929 (GRCh38)
Gene constraint: LOEUF 0.537 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Residue 480: the vitellogenin domain; a disulfide bond

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

Disease context

familial hypobetalipoproteinemia 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hypercholesterolemia, autosomal dominant, type B

Similar variants

APOB c.1830-1G>A Pathogenic ★★ same condition
APOB c.2604+1G>A Likely pathogenic ★★ same condition
APOB c.537+1G>T Pathogenic/Likely pathogenic ★★ same condition
APOB p.Arg1333Ter Pathogenic ★★ same condition
APOB p.Arg2012Ter Pathogenic ★★ same condition
APOB p.Arg2085Ter Pathogenic/Likely pathogenic ★★ same condition
APOB p.Arg2513Ter Pathogenic ★★ same condition
APOB p.Arg2520Ter Pathogenic/Likely pathogenic ★★ same condition

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/apob-p-gly480val (accessed [today's date]).

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