Is ANK2 p.Thr1518= (c.4554C>T) pathogenic?

ANK2 p.Thr1518= (c.4554C>T) is classified Benign/Likely benign in ANK2 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2021-10-31). Ultra-rare (popmax 0.0187%, sas); Associated with long QT syndrome.

What condition is associated with ANK2 p.Thr1518= (c.4554C>T)?

ANK2 p.Thr1518= (c.4554C>T) is associated with long QT syndrome (ClinVar).

How common is ANK2 p.Thr1518= (c.4554C>T) in the general population?

ANK2 p.Thr1518= (c.4554C>T) is ultra-rare (popmax 0.0187%, sas) (gnomAD).

ANK2 p.Thr1518=

c.4554C>T · rs747525865 · VCV390827

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0187%, sas)

Conditions

long QT syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -8.5	GERP -5.7
Overall
CADD	5.533	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0187% South Asian · 17/91,078 alleles

Filtering AF 0.0118% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00976%

Overall 0.00192% 31/1,613,854 alleles · ultra-rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0187%	5,358
Remaining individualsnot grpmax-eligible	0.0032%	31,237
African / African-American	0.00134%	74,880
European (non-Finnish)	0.000932%	107,268

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.Thr1518=
Coding: c.4554C>T
MANE Select: NM_001148
dbSNP: rs747525865
Type: single nucleotide variant
Location: chr4:113353172 (GRCh38)
Gene constraint: LOEUF 0.271 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Residue 1518: the death 1 domain; an α-helix

Full ANK2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

long QT syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ANK2 p.Arg3113Ter 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
ANK2 c.693+6G>A Uncertain significance ★★ same condition
ANK2 c.85-3C>T 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-thr1518 (accessed [today's date]).

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