Is DMD p.Asn201= (c.603C>T) pathogenic?

DMD p.Asn201= (c.603C>T) is classified Likely benign in DMD (ClinVar, Single submitter, 2 submitters; last evaluated 2025-03-17). Very rare (popmax 0.00175%, sas); Associated with Duchenne muscular dystrophy.

What condition is associated with DMD p.Asn201= (c.603C>T)?

DMD p.Asn201= (c.603C>T) is associated with Duchenne muscular dystrophy, cardiomyopathy, Becker muscular dystrophy (ClinVar).

How common is DMD p.Asn201= (c.603C>T) in the general population?

DMD p.Asn201= (c.603C>T) is very rare (popmax 0.00175%, sas) (gnomAD).

How is Duchenne muscular dystrophy inherited?

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

DMD p.Asn201=

c.603C>T · rs750180929 · VCV526120

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00175%, sas)

Conditions

Duchenne muscular dystrophy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.9	GERP 0.65, phastCons 1
Overall
CADD	7.265	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00175% South Asian · 1/56,988 alleles

Overall 0.000182% 2/1,097,897 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00175%	56,988
African / African-American	0.00173%	57,727

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: DMD
Protein: p.Asn201=
Coding: c.603C>T
MANE Select: NM_004006
dbSNP: rs750180929
Type: single nucleotide variant
Location: chrX:32809539 (GRCh38)
Residue 201: an α-helix; the calponin-homology (ch) 2 domain; the 'actin-binding' region

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

Also linked: cardiomyopathy Becker muscular dystrophy

For Duchenne muscular dystrophy (Orphanet):

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

Similar variants

DMD p.Asn201Ile Uncertain significance ★★ ⚠ same residue
DMD p.Asn201Ser 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
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-asn201 (accessed [today's date]).

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