Is JUP p.Arg203= (c.609C>T) pathogenic?

JUP p.Arg203= (c.609C>T) is classified Likely benign in JUP (ClinVar, Single submitter, 1 submitter; last evaluated 2024-10-28). Absent from gnomAD v4.1; Associated with Cardiovascular phenotype.

What condition is associated with JUP p.Arg203= (c.609C>T)?

JUP p.Arg203= (c.609C>T) is associated with Cardiovascular phenotype (ClinVar).

How common is JUP p.Arg203= (c.609C>T) in the general population?

JUP p.Arg203= (c.609C>T) is absent from gnomAD v4.1 (gnomAD).

JUP p.Arg203=

c.609C>T · VCV3531644

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.9	GERP -1, phastCons 1
Overall
CADD	9.091	PHRED · no single calibrated threshold — expert panels disagree

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.Arg203=
Coding: c.609C>T
MANE Select: NM_002230
Type: single nucleotide variant
Location: chr17:41769067 (GRCh38)
Gene constraint: LOEUF 0.533 · pLI 0.74 (gnomAD)
Structure: AlphaFold pLDDT 80.88 · 1 PDB
Residue 203: the 'interaction with dsc1 and dsg1' region; an α-helix

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

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

JUP p.Arg203His Conflicting classifications of pathogenicity ★ ⚠ same residue
JUP p.Arg203Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
JUP c.468+4T>C Uncertain significance ★★ same condition
JUP c.707+5C>A Uncertain significance ★★ same condition
JUP c.-1G>A Uncertain significance ★★ same condition
JUP p.Ala178Val Uncertain significance ★★ ⚠ same condition
JUP p.Ala263Val Uncertain significance ★★ ⚠ same condition
JUP p.Ala314Gly 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-arg203 (accessed [today's date]).

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