Is ANK2 p.Arg255Gln (c.764G>A) pathogenic?

ANK2 p.Arg255Gln (c.764G>A) is classified Uncertain significance in ANK2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-11-07). AlphaMissense: likely pathogenic (0.8828); Very rare (popmax 0.00627%, nfe); Associated with Cardiovascular phenotype.

What condition is associated with ANK2 p.Arg255Gln (c.764G>A)?

ANK2 p.Arg255Gln (c.764G>A) is associated with Cardiovascular phenotype, long QT syndrome (ClinVar).

How common is ANK2 p.Arg255Gln (c.764G>A) in the general population?

ANK2 p.Arg255Gln (c.764G>A) is very rare (popmax 0.00627%, nfe) (gnomAD).

What do computational predictors say about ANK2 p.Arg255Gln (c.764G>A)?

AlphaMissense predicts likely pathogenic (score 0.8828) — an in-silico prediction, not a clinical call.

ANK2 p.Arg255Gln

c.764G>A · rs764008198 · VCV1488802

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely pathogenic

0.8828 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00627%, nfe)

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
AlphaMissense	0.8828	likely pathogenic
REVEL	0.354	indeterminate
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 0.51	unconstrained · MANE · 24 kb · p 3.4e-14 · regional, not allelic
Overall
CADD	33.0	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 0.00627% European (non-Finnish) · 74/1,179,836 alleles

Filtering AF 0.00511% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00468%

Overall 0.00483% 78/1,613,636 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00627%	15,944
African / African-American	0.00267%	37,433
South Asian	0.0022%	45,538

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: ANK2
Protein: p.Arg255Gln
Coding: c.764G>A
MANE Select: NM_001148
dbSNP: rs764008198
Type: single nucleotide variant
Location: chr4:113240555 (GRCh38)
Gene constraint: LOEUF 0.271 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)

Full ANK2 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

Also linked: long QT syndrome

Similar variants

ANK2 p.Arg3113Ter Pathogenic ★★ same condition
ANK2 p.Arg895Ter Pathogenic/Likely pathogenic ★★ same condition
ANK2 p.Arg977Ter Pathogenic ★★ same condition
ANK2 c.11611-3T>A Uncertain significance ★★ same condition
ANK2 c.1783-3C>T Uncertain significance ★★ same condition
ANK2 c.2079+5T>G Uncertain significance ★★ same condition
ANK2 c.2278-3C>T Uncertain significance ★★ same condition
ANK2 c.3125+6G>A Uncertain significance ★★ 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/ank2-p-arg255gln (accessed [today's date]).

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