Is CASQ2 p.Asp374Val (c.1121A>T) pathogenic?

CASQ2 p.Asp374Val (c.1121A>T) is classified Uncertain significance in CASQ2 (ClinVar, Single submitter, 1 submitter; last evaluated 2018-01-12). AlphaMissense: likely benign (0.2374); Absent from gnomAD v4.1; Associated with catecholaminergic polymorphic ventricular tachycardia 2.

What condition is associated with CASQ2 p.Asp374Val (c.1121A>T)?

CASQ2 p.Asp374Val (c.1121A>T) is associated with catecholaminergic polymorphic ventricular tachycardia 2 (ClinVar).

How common is CASQ2 p.Asp374Val (c.1121A>T) in the general population?

CASQ2 p.Asp374Val (c.1121A>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CASQ2 p.Asp374Val (c.1121A>T)?

AlphaMissense predicts likely benign (score 0.2374) — an in-silico prediction, not a clinical call.

CASQ2 p.Asp374Val

Q: How is Catecholaminergic polymorphic ventricular tachycardia inherited?

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

c.1121A>T · rs886045158 · VCV292125

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2374 · 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 2

Computational evidence

Protein change
AlphaMissense	0.2374	likely benign
REVEL	0.375	indeterminate
SaProt	LLR -8.59	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 7.9	GERP 2.8, phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 67 kb · p 0.83 · regional, not allelic
Overall
CADD	26.0	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.Asp374Val
Coding: c.1121A>T
MANE Select: NM_001232
dbSNP: rs886045158
Type: single nucleotide variant
Location: chr1:115701320 (GRCh38)
Gene constraint: LOEUF 1.322 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 90.63 · 4 PDB
Residue 374: the 'disordered' region

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

Disease context

catecholaminergic polymorphic ventricular tachycardia 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Catecholaminergic polymorphic ventricular tachycardia (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: Adolescent, Adult, Childhood
Prevalence: 1-5 / 10 000 (Europe)

Similar variants

CASQ2 p.Asp374Asn Uncertain significance ★ ⚠ same residue
CASQ2 p.Asp374Gly Uncertain significance ★ ⚠ same residue
CASQ2 p.Asp374His Uncertain significance ★ same residue
CASQ2 p.Asp374= Likely benign ★ same residue
CASQ2 c.235-2A>G Likely pathogenic ★★ same condition
CASQ2 c.320-2A>G Pathogenic ★★ same condition
CASQ2 c.532+1G>A Pathogenic/Likely pathogenic ★★ same condition
CASQ2 c.533-2A>G 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-asp374val (accessed [today's date]).

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