Is DSP p.Ala997= (c.2991A>C) pathogenic?

DSP p.Ala997= (c.2991A>C) is classified Likely benign in DSP (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-12-07). Very rare (popmax 0.000254%, nfe); Associated with cardiomyopathy.

How common is DSP p.Ala997= (c.2991A>C) in the general population?

DSP p.Ala997= (c.2991A>C) is very rare (popmax 0.000254%, nfe) (gnomAD).

DSP p.Ala997=

Q: What condition is associated with DSP p.Ala997= (c.2991A>C)?

DSP p.Ala997= (c.2991A>C) is associated with cardiomyopathy, arrhythmogenic cardiomyopathy with wooly hair and keratoderma, arrhythmogenic right ventricular dysplasia 8 (ClinVar).

c.2991A>C · rs780686578 · VCV386629

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

very rare (popmax 0.000254%, nfe)

Conditions

cardiomyopathy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
Splicing
SpliceAI	Δ0.20	acceptor loss, 2 bp away · masked 0 · deltas
Constraint at this position
Conservation	phyloP 0.044	GERP -0.043, phastCons 0.049
Overall
CADD	7.237	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000254% European (non-Finnish) · 3/1,179,568 alleles

Filtering AF 6.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.9e-05%

Overall 0.000186% 3/1,613,324 alleles · very rare

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: DSP
Protein: p.Ala997=
Coding: c.2991A>C
MANE Select: NM_004415
dbSNP: rs780686578
Type: single nucleotide variant
Location: chr6:7578469 (GRCh38)
Gene constraint: LOEUF 0.443 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Residue 997: a UniProt-annotated variant site (in arvd8; uncertain significance); a UniProt-annotated variant site (in dcwhkta; uncertain significance); the 'globular 1' region; a UniProt-annotated variant site (in arvd8; likely pathogenic; results in an unstable protein that forms perinuclear aggregates); a UniProt-annotated variant site (in arvd8 and dcwhkta; uncertain significance); a UniProt-annotated variant site (in arvd8)

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

Disease context

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

Also linked: arrhythmogenic cardiomyopathy with wooly hair and keratoderma arrhythmogenic right ventricular dysplasia 8

Similar variants

DSP p.Ala997Val Uncertain significance ★ ⚠ same residue
DSP c.1141-2A>T Likely pathogenic ★★ same condition
DSP c.1266+2T>C Likely pathogenic ★★ same condition
DSP c.1574+1G>A Likely pathogenic ★★ same condition
DSP c.2130+1G>A Pathogenic/Likely pathogenic ★★ same condition
DSP c.2297+1G>A Likely pathogenic ★★ same condition
DSP c.2298-1G>C Likely pathogenic ★★ same condition
DSP c.2298-2A>C 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/dsp-p-ala997 (accessed [today's date]).

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