Is DMD p.Arg3370Ter (c.10108C>T) pathogenic?

DMD p.Arg3370Ter (c.10108C>T) is classified Pathogenic in DMD (ClinVar, Multiple submitters, 11 submitters; last evaluated 2025-05-20). Absent from gnomAD v4.1; Associated with Becker muscular dystrophy, Cardiomyopathy, Duchenne muscular dystrophy, Dystrophin deficiency.

How common is DMD p.Arg3370Ter (c.10108C>T) in the general population?

DMD p.Arg3370Ter (c.10108C>T) is absent from gnomAD v4.1 (gnomAD).

DMD p.Arg3370Ter

Q: What condition is associated with DMD p.Arg3370Ter (c.10108C>T)?

DMD p.Arg3370Ter (c.10108C>T) is associated with Becker muscular dystrophy, Cardiomyopathy, Duchenne muscular dystrophy, Dystrophin deficiency, Becker muscular dystrophy, dilated cardiomyopathy 3B (ClinVar).

c.10108C>T · rs104894787 · VCV11213

Pathogenic Multiple submitters

Classification

Pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 11 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

Becker muscular dystrophy, Cardiomyopathy, Duchenne muscular dystrophy, Dystrophin deficiency

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function in a haploinsufficient gene (ClinGen)
NMD	predicted	premature termination codon in exon 70 of 79
REVEL	0.208	benign-leaning
Splicing
SpliceAI	Δ0.22	acceptor loss · deltas
Constraint at this position
Conservation	phyloP 10	GERP 3.4, phastCons 1
Overall
CADD	49.0	PHRED · no single calibrated threshold — expert panels disagree

Predicted loss-of-function is descriptive, not an applied PVS1 code.

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.Arg3370Ter
Coding: c.10108C>T
MANE Select: NM_004006
dbSNP: rs104894787
Type: single nucleotide variant
Location: chrX:31178784 (GRCh38)
Residue 3370: the 'interaction with synm' region

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

Disease context

Becker muscular dystrophy, Cardiomyopathy, Duchenne muscular dystrophy, Dystrophin deficiency

Also linked: Becker muscular dystrophy dilated cardiomyopathy 3B Duchenne muscular dystrophy

Similar variants

DMD p.Arg3370Pro Conflicting classifications of pathogenicity ★ same residue
DMD p.Arg3370= Likely benign ★ 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
DMD c.10223+1G>C 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-arg3370ter (accessed [today's date]).

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