Is DSC2 p.Gln320Pro (c.959A>C) pathogenic?

DSC2 p.Gln320Pro (c.959A>C) is classified Uncertain significance in DSC2 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2022-02-18). AlphaMissense: ambiguous (0.5455); Very rare (popmax 8.48e-05%, nfe); Associated with arrhythmogenic right ventricular dysplasia 11.

What condition is associated with DSC2 p.Gln320Pro (c.959A>C)?

DSC2 p.Gln320Pro (c.959A>C) is associated with arrhythmogenic right ventricular dysplasia 11 (ClinVar).

How common is DSC2 p.Gln320Pro (c.959A>C) in the general population?

DSC2 p.Gln320Pro (c.959A>C) is very rare (popmax 8.48e-05%, nfe) (gnomAD).

What do computational predictors say about DSC2 p.Gln320Pro (c.959A>C)?

AlphaMissense predicts ambiguous (score 0.5455) — an in-silico prediction, not a clinical call.

DSC2 p.Gln320Pro

Q: How is Inherited isolated arrhythmogenic cardiomyopathy inherited?

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

c.959A>C · rs1481724064 · VCV1299861

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

ambiguous

0.5455 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.48e-05%, nfe)

Missense predictors

1/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

arrhythmogenic right ventricular dysplasia 11

Computational evidence

Protein change
AlphaMissense	0.5455	ambiguous
REVEL	0.258	benign-leaning
SaProt	LLR -14.60	damaging
⇒ SaProt calls this damaging; REVEL does not; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.61	GERP -0.67, phastCons 0.32
Regional constraint	o/e 0.98	unconstrained · MANE · 34 kb · p 0.48 · regional, not allelic
Overall
CADD	18.26	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

Grpmax group 8.48e-05% European (non-Finnish) · 1/1,179,480 alleles

Overall 6.2e-05% 1/1,612,392 alleles · very rare exomes 1/1,460,056 · genomes 0/152,336 · joint denominator

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: DSC2
Protein: p.Gln320Pro
Coding: c.959A>C
MANE Select: NM_024422
dbSNP: rs1481724064
Type: single nucleotide variant
Location: chr18:31083044 (GRCh38)
Gene constraint: LOEUF 0.743 · pLI <0.01 · ClinGen HI 1/3 (gnomAD)
Structure: AlphaFold pLDDT 77.26 · 3 PDB
Residue 320: a β-strand; the cadherin 2 domain

Full DSC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

arrhythmogenic right ventricular dysplasia 11 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Inherited isolated arrhythmogenic cardiomyopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: No data available

Similar variants

DSC2 p.Gln320Arg Uncertain significance ★ ⚠ same residue
DSC2 p.Gln320His Uncertain significance ★ ⚠ same residue
DSC2 c.1664-1G>A Likely pathogenic ★★ same condition
DSC2 c.354+2T>A Likely pathogenic ★★ same condition
DSC2 c.355-1G>A Likely pathogenic ★★ same condition
DSC2 p.Gln554Ter Pathogenic ★★ same condition
DSC2 p.Gln620Ter Pathogenic ★★ same condition
DSC2 p.Glu127Ter Pathogenic/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/dsc2-p-gln320pro (accessed [today's date]).

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