Is DMD p.Arg2778= (c.8334T>A) pathogenic?

DMD p.Arg2778= (c.8334T>A) is classified Conflicting classifications of pathogenicity in DMD (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2024-03-13). Absent from gnomAD v4.1; Associated with Duchenne muscular dystrophy.

What condition is associated with DMD p.Arg2778= (c.8334T>A)?

DMD p.Arg2778= (c.8334T>A) is associated with Duchenne muscular dystrophy (ClinVar).

How common is DMD p.Arg2778= (c.8334T>A) in the general population?

DMD p.Arg2778= (c.8334T>A) is absent from gnomAD v4.1 (gnomAD).

How is Duchenne muscular dystrophy inherited?

Typically X-linked recessive (Orphanet). A genetic counselor can assess individual risk for a family.

DMD p.Arg2778=

c.8334T>A · rs1556669808 · VCV498270

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

Duchenne muscular dystrophy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.027	moderately benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3	GERP -2.6, phastCons 1
Overall
CADD	7.074	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: DMD
Protein: p.Arg2778=
Coding: c.8334T>A
MANE Select: NM_004006
dbSNP: rs1556669808
Type: single nucleotide variant
Location: chrX:31507337 (GRCh38)

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

Disease context

Duchenne muscular dystrophy — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Duchenne muscular dystrophy (Orphanet):

Inheritance: X-linked recessive
Onset: Childhood
Prevalence: 1-9 / 100 000 (Worldwide)

Similar variants

DMD p.Arg2778Cys Uncertain significance ★★ same residue
DMD p.Arg2778His Uncertain significance ★★ same residue
DMD p.Arg2778Leu Uncertain significance ★ same residue
DMD c.10086+1G>A Pathogenic ★★ same condition
DMD c.10086+1G>T Pathogenic ★★ same condition
DMD c.10086+2T>C Pathogenic ★★ same condition
DMD c.10087-2A>G Pathogenic/Likely pathogenic ★★ same condition
DMD c.10223+1G>A 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/dmd-p-arg2778 (accessed [today's date]).

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