Is CASQ2 p.Pro224Ser (c.670C>T) pathogenic?

CASQ2 p.Pro224Ser (c.670C>T) is classified Uncertain significance in CASQ2 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-15). AlphaMissense: likely benign (0.1638); Absent from gnomAD v4.1; Associated with catecholaminergic polymorphic ventricular tachycardia 1.

What condition is associated with CASQ2 p.Pro224Ser (c.670C>T)?

CASQ2 p.Pro224Ser (c.670C>T) is associated with catecholaminergic polymorphic ventricular tachycardia 1 (ClinVar).

How common is CASQ2 p.Pro224Ser (c.670C>T) in the general population?

CASQ2 p.Pro224Ser (c.670C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CASQ2 p.Pro224Ser (c.670C>T)?

AlphaMissense predicts likely benign (score 0.1638) — an in-silico prediction, not a clinical call.

CASQ2 p.Pro224Ser

Q: How is Inherited isolated arrhythmogenic cardiomyopathy inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

c.670C>T · VCV4771980

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1638 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

catecholaminergic polymorphic ventricular tachycardia 1

Computational evidence

Protein change
AlphaMissense	0.1638	likely benign
REVEL	0.639	indeterminate
SaProt	LLR -7.04	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 5.7	GERP 1.8, phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 67 kb · p 0.83 · regional, not allelic
Overall
CADD	25.2	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CASQ2
Protein: p.Pro224Ser
Coding: c.670C>T
MANE Select: NM_001232
Type: single nucleotide variant
Location: chr1:115727059 (GRCh38)
Gene constraint: LOEUF 1.322 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 90.63 · 4 PDB

Full CASQ2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

catecholaminergic polymorphic ventricular tachycardia 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Inherited isolated arrhythmogenic cardiomyopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: No data available

Similar variants

CASQ2 p.Pro224= Likely benign ★ same residue
CASQ2 c.235-2A>G Likely pathogenic ★★ same condition
CASQ2 c.319+2T>G Likely pathogenic ★★ same condition
CASQ2 c.320-2A>G Pathogenic ★★ same condition
CASQ2 c.420+1G>A Likely pathogenic ★★ same condition
CASQ2 c.606+1G>C Pathogenic/Likely pathogenic ★★ same condition
CASQ2 c.606+2T>A Likely pathogenic ★★ same condition
CASQ2 c.737+1G>A 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/casq2-p-pro224ser (accessed [today's date]).

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