Is CAV3 p.Asp43Val (c.128A>T) pathogenic?

CAV3 p.Asp43Val (c.128A>T) is classified Uncertain significance in CAV3 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-02-29). AlphaMissense: likely pathogenic (0.9645); Absent from gnomAD v4.1; Associated with long QT syndrome.

What condition is associated with CAV3 p.Asp43Val (c.128A>T)?

CAV3 p.Asp43Val (c.128A>T) is associated with long QT syndrome (ClinVar).

How common is CAV3 p.Asp43Val (c.128A>T) in the general population?

CAV3 p.Asp43Val (c.128A>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CAV3 p.Asp43Val (c.128A>T)?

AlphaMissense predicts likely pathogenic (score 0.9645) — an in-silico prediction, not a clinical call.

CAV3 p.Asp43Val

c.128A>T · rs1559654264 · VCV579228

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely pathogenic

0.9645 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

long QT syndrome

Computational evidence

Protein change
AlphaMissense	0.9645	likely pathogenic
REVEL	0.942	strongly pathogenic-leaning
SaProt	LLR -13.74	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 2.7, phastCons 1
Regional constraint	o/e 0.83	unconstrained · MANE · 12 kb · p 0.021 · regional, not allelic
Overall
CADD	27.2	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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: CAV3
Protein: p.Asp43Val
Coding: c.128A>T
MANE Select: NM_033337
dbSNP: rs1559654264
Type: single nucleotide variant
Location: chr3:8745539 (GRCh38)
Gene constraint: LOEUF 1.064 · pLI 0.04 (gnomAD)
Structure: AlphaFold pLDDT 88.54

Full CAV3 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

CAV3 p.Asp43= Likely benign ★★ same residue
CAV3 p.Asp43Gly Likely pathogenic ★ same residue
CAV3 c.114+2T>C Pathogenic ★★ same condition
CAV3 p.Ala46Thr Pathogenic/Likely pathogenic ★★ same condition
CAV3 p.Arg27Gln Pathogenic ★★ same condition
CAV3 p.Trp71Ter Pathogenic/Likely pathogenic ★★ same condition
CAV3 c.114+5G>C Uncertain significance ★★ same condition
CAV3 p.Ala102Val 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/cav3-p-asp43val (accessed [today's date]).

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