Is DSP p.Asp1248Asn (c.3742G>A) pathogenic?

DSP p.Asp1248Asn (c.3742G>A) is classified Uncertain significance in DSP (ClinVar, Multiple submitters, 5 submitters; last evaluated 2024-03-06). AlphaMissense: likely benign (0.2477); Very rare (popmax 0.00133%, afr); Associated with arrhythmogenic right ventricular dysplasia 8.

What condition is associated with DSP p.Asp1248Asn (c.3742G>A)?

DSP p.Asp1248Asn (c.3742G>A) is associated with arrhythmogenic right ventricular dysplasia 8, cardiomyopathy, arrhythmogenic cardiomyopathy with wooly hair and keratoderma (ClinVar).

How common is DSP p.Asp1248Asn (c.3742G>A) in the general population?

DSP p.Asp1248Asn (c.3742G>A) is very rare (popmax 0.00133%, afr) (gnomAD).

What do computational predictors say about DSP p.Asp1248Asn (c.3742G>A)?

AlphaMissense predicts likely benign (score 0.2477) — an in-silico prediction, not a clinical call.

DSP p.Asp1248Asn

Q: How is Inherited isolated arrhythmogenic cardiomyopathy inherited?

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

c.3742G>A · rs989348634 · VCV922143

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

AlphaMissense

likely benign

0.2477 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00133%, afr)

Conditions

arrhythmogenic right ventricular dysplasia 8

Computational evidence

Protein change
AlphaMissense	0.2477	likely benign
REVEL	0.411	indeterminate
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.6, phastCons 1
Regional constraint	o/e 0.93	unconstrained · MANE · 12 kb · p 0.0024 · regional, not allelic
Overall
CADD	25.9	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 0.00133% African / African-American · 1/74,936 alleles

Overall 0.000124% 2/1,614,008 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00133%	74,936
European (non-Finnish)	8.47e-05%	1,180,032

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.Asp1248Asn
Coding: c.3742G>A
MANE Select: NM_004415
dbSNP: rs989348634
Type: single nucleotide variant
Location: chr6:7579932 (GRCh38)
Gene constraint: LOEUF 0.443 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Residue 1248: a UniProt-annotated variant site (in arvd8; uncertain significance); a UniProt-annotated variant site (in dcwhkta; uncertain significance); the 'central fibrous rod domain' region; the 'binds to telomeres' 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

arrhythmogenic right ventricular dysplasia 8 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: cardiomyopathy arrhythmogenic cardiomyopathy with wooly hair and keratoderma lethal acantholytic epidermolysis bullosa keratosis palmoplantaris striata 2 cardiomyopathy, dilated, with wooly hair, keratoderma, and tooth agenesis woolly hair-skin fragility syndrome

For Inherited isolated arrhythmogenic cardiomyopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: No data available

Similar variants

DSP p.Asp1248His Uncertain significance ★★ same residue
DSP p.Asp1248Ala Conflicting classifications of pathogenicity ★ same residue
DSP p.Asp1248fs Pathogenic ★★ same residue
DSP p.Asp1248Val 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

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-asp1248asn (accessed [today's date]).

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