Is DMD p.Ser68= (c.204C>G) pathogenic?

DMD p.Ser68= (c.204C>G) is classified Likely benign in DMD (ClinVar, Single submitter, 1 submitter; last evaluated 2023-12-20). Very rare (popmax 0.00525%, afr); Associated with Duchenne muscular dystrophy.

What condition is associated with DMD p.Ser68= (c.204C>G)?

DMD p.Ser68= (c.204C>G) is associated with Duchenne muscular dystrophy (ClinVar).

How common is DMD p.Ser68= (c.204C>G) in the general population?

DMD p.Ser68= (c.204C>G) is very rare (popmax 0.00525%, afr) (gnomAD).

How is Duchenne muscular dystrophy inherited?

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

DMD p.Ser68=

c.204C>G · rs150068287 · VCV2414758

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00525%, afr)

Conditions

Duchenne muscular dystrophy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 3.8	GERP -1.6, phastCons 1
Overall
CADD	8.252	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00525% African / African-American · 3/57,157 alleles

Filtering AF 0.00139% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000686%

Overall 0.000331% 4/1,209,260 alleles · very rare exomes 3/1,097,354 · genomes 1/111,906 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00525%	19,052
Remaining individualsnot grpmax-eligible	0.0021%	47,582

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.Ser68=
Coding: c.204C>G
MANE Select: NM_004006
dbSNP: rs150068287
Type: single nucleotide variant
Location: chrX:32844843 (GRCh38)
Residue 68: the calponin-homology (ch) 1 domain; the 'actin-binding' region; the 'ank2- and ank-3 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

For Duchenne muscular dystrophy (Orphanet):

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

Similar variants

DMD p.Ser68fs Pathogenic ★ 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
DMD c.10224-2A>G 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/dmd-p-ser68 (accessed [today's date]).

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