Is JUP p.Pro703Arg (c.2108C>G) pathogenic?

JUP p.Pro703Arg (c.2108C>G) is classified Uncertain significance in JUP (ClinVar, Single submitter, 1 submitter; last evaluated 2020-08-14). AlphaMissense: ambiguous (0.4731); Absent from gnomAD v4.1; Associated with arrhythmogenic right ventricular dysplasia 12.

What condition is associated with JUP p.Pro703Arg (c.2108C>G)?

JUP p.Pro703Arg (c.2108C>G) is associated with arrhythmogenic right ventricular dysplasia 12, Naxos disease (ClinVar).

How common is JUP p.Pro703Arg (c.2108C>G) in the general population?

JUP p.Pro703Arg (c.2108C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about JUP p.Pro703Arg (c.2108C>G)?

AlphaMissense predicts ambiguous (score 0.4731) — an in-silico prediction, not a clinical call.

JUP p.Pro703Arg

Q: How is Inherited isolated arrhythmogenic cardiomyopathy inherited?

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

c.2108C>G · rs1008749253 · VCV1061982

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4731 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense indeterminate

Conditions

arrhythmogenic right ventricular dysplasia 12

Computational evidence

Protein change
AlphaMissense	0.4731	ambiguous
REVEL	0.097	moderately benign-leaning
SaProt	LLR -7.42	tolerated
⇒ REVEL and SaProt both call this tolerated; AlphaMissense is indeterminate.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 7.4	GERP 0.54, phastCons 1
Regional constraint	o/e 0.84	unconstrained · MANE · 16 kb · p 5.2e-07 · regional, not allelic
Overall
CADD	22.2	PHRED · no single calibrated threshold — expert panels disagree

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: JUP
Protein: p.Pro703Arg
Coding: c.2108C>G
MANE Select: NM_002230
dbSNP: rs1008749253
Type: single nucleotide variant
Location: chr17:41755874 (GRCh38)
Gene constraint: LOEUF 0.533 · pLI 0.74 (gnomAD)
Structure: AlphaFold pLDDT 80.88 · 1 PDB

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

Disease context

arrhythmogenic right ventricular dysplasia 12 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Naxos disease

For Inherited isolated arrhythmogenic cardiomyopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: No data available

Similar variants

JUP p.Pro703Ser Uncertain significance ★ ⚠ same residue
JUP c.1773+3G>A Uncertain significance ★★ same condition
JUP c.468+4T>C Uncertain significance ★★ same condition
JUP c.707+5C>A Uncertain significance ★★ same condition
JUP c.*1026G>A Uncertain significance ★★ same condition
JUP c.*1136C>T Uncertain significance ★★ same condition
JUP c.*413C>T Uncertain significance ★★ same condition
JUP c.*771G>C 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/jup-p-pro703arg (accessed [today's date]).

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