Is CAV3 p.Leu136Pro (c.407T>C) pathogenic?

CAV3 p.Leu136Pro (c.407T>C) is classified Uncertain significance in CAV3 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-02-06). AlphaMissense: likely pathogenic (0.8173); Absent from gnomAD v4.1; Associated with long QT syndrome.

What condition is associated with CAV3 p.Leu136Pro (c.407T>C)?

CAV3 p.Leu136Pro (c.407T>C) is associated with long QT syndrome (ClinVar).

How common is CAV3 p.Leu136Pro (c.407T>C) in the general population?

CAV3 p.Leu136Pro (c.407T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CAV3 p.Leu136Pro (c.407T>C)?

AlphaMissense predicts likely pathogenic (score 0.8173) — an in-silico prediction, not a clinical call.

CAV3 p.Leu136Pro

c.407T>C · VCV3683619

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.8173 · 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	0.8173	likely pathogenic
REVEL	0.877	moderately pathogenic-leaning
SaProt	LLR -12.20	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 7.8	GERP 2.9, 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.Leu136Pro
Coding: c.407T>C
MANE Select: NM_033337
Type: single nucleotide variant
Location: chr3:8745818 (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.Leu136= Likely benign ★ 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
CAV3 p.Ala134Glu 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-leu136pro (accessed [today's date]).

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