Is DSC2 p.Arg680Cys (c.2038C>T) pathogenic?

DSC2 p.Arg680Cys (c.2038C>T) is classified Uncertain significance in DSC2 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-11-27). AlphaMissense: likely pathogenic (0.6033); Very rare (popmax 0.00167%, amr); Associated with familial isolated arrhythmogenic right ventricular dysplasia.

What condition is associated with DSC2 p.Arg680Cys (c.2038C>T)?

DSC2 p.Arg680Cys (c.2038C>T) is associated with familial isolated arrhythmogenic right ventricular dysplasia, cardiomyopathy, arrhythmogenic right ventricular dysplasia 11 (ClinVar).

How common is DSC2 p.Arg680Cys (c.2038C>T) in the general population?

DSC2 p.Arg680Cys (c.2038C>T) is very rare (popmax 0.00167%, amr) (gnomAD).

What do computational predictors say about DSC2 p.Arg680Cys (c.2038C>T)?

AlphaMissense predicts likely pathogenic (score 0.6033) — an in-silico prediction, not a clinical call.

DSC2 p.Arg680Cys

Q: How is Inherited isolated arrhythmogenic cardiomyopathy inherited?

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

c.2038C>T · rs757253682 · VCV1332639

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely pathogenic

0.6033 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

familial isolated arrhythmogenic right ventricular dysplasia

Computational evidence

Protein change
AlphaMissense	0.6033	likely pathogenic
REVEL	0.28	benign-leaning
SaProt	LLR -8.73	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1	GERP 1.1
Regional constraint	o/e 0.98	unconstrained · MANE · 34 kb · p 0.48 · regional, not allelic
Overall
CADD	19.38	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 0.00167% Admixed American · 1/60,022 alleles

Filtering AF 7.9e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 5.4e-05%

Overall 0.000434% 7/1,614,074 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	60,022
African / African-American	0.00133%	75,040
South Asian	0.0011%	91,070
European (non-Finnish)	0.000339%	294,997

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.Arg680Cys
Coding: c.2038C>T
MANE Select: NM_024422
dbSNP: rs757253682
Type: single nucleotide variant
Location: chr18:31071692 (GRCh38)
Gene constraint: LOEUF 0.743 · pLI <0.01 · ClinGen HI 1/3 (gnomAD)
Structure: AlphaFold pLDDT 77.26 · 3 PDB
Residue 680: the cadherin 5 domain; a UniProt-annotated variant site (in arvd11; likely pathogenic; mislocalization of dsc2 to the cytoplasm within intercalated disks of the heart)

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

Disease context

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

Also linked: cardiomyopathy arrhythmogenic right ventricular dysplasia 11

For Inherited isolated arrhythmogenic cardiomyopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: No data available

Similar variants

DSC2 p.Arg680Ser Uncertain significance ★★ ⚠ same residue
DSC2 p.Arg680= Uncertain significance ★ same residue
DSC2 p.Arg680His Conflicting classifications of pathogenicity ★ ⚠ same residue
DSC2 p.Arg680Leu Conflicting classifications of pathogenicity ★ ⚠ 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

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-arg680cys (accessed [today's date]).

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