Is APOC2 p.Lys77Arg (c.230A>G) pathogenic?

APOC2 p.Lys77Arg (c.230A>G) is classified Uncertain significance in APOC2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-06-07). AlphaMissense: likely benign (0.1227); Very rare (popmax 8.47e-05%, nfe); Associated with Cardiovascular phenotype.

What condition is associated with APOC2 p.Lys77Arg (c.230A>G)?

APOC2 p.Lys77Arg (c.230A>G) is associated with Cardiovascular phenotype (ClinVar).

How common is APOC2 p.Lys77Arg (c.230A>G) in the general population?

APOC2 p.Lys77Arg (c.230A>G) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

What do computational predictors say about APOC2 p.Lys77Arg (c.230A>G)?

AlphaMissense predicts likely benign (score 0.1227) — an in-silico prediction, not a clinical call.

APOC2 p.Lys77Arg

c.230A>G · VCV3308437

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1227 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.47e-05%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
AlphaMissense	0.1227	likely benign
REVEL	0.41	indeterminate
SaProt	LLR -4.99	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 6.3	GERP -0.27, phastCons 1
Regional constraint	o/e 0.94	unconstrained · MANE · 767 bp · p 0.48 · regional, not allelic
Overall
CADD	22.7	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 8.47e-05% European (non-Finnish) · 1/1,179,994 alleles

Overall 6.84e-05% 1/1,461,724 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: APOC2
Protein: p.Lys77Arg
Coding: c.230A>G
MANE Select: NM_000483
Type: single nucleotide variant
Location: chr19:44949173 (GRCh38)
Gene constraint: LOEUF 1.054 · pLI 0.07 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 65.81 · 4 PDB
Residue 77: a turn; a UniProt-annotated variant site (in africa)

Full APOC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

APOC2 p.Gln25Ter Likely pathogenic ★★ same condition
APOC2 p.Ala54Asp Uncertain significance ★★ ⚠ same condition
APOC2 p.Ala55Thr Uncertain significance ★★ ⚠ same condition
APOC2 p.Ser76Ile Uncertain significance ★★ ⚠ same condition
APOC2 p.Thr23Ile Uncertain significance ★★ ⚠ same condition
APOC2 p.Thr86Arg Uncertain significance ★★ ⚠ same condition
APOC2 p.Val67Ile Uncertain significance ★★ ⚠ same condition
APOC2 c.56-4G>C Benign ★★ 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/apoc2-p-lys77arg (accessed [today's date]).

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