Is DES p.Leu338Arg (c.1013_1014delinsGC) pathogenic?

DES p.Leu338Arg (c.10131014delinsGC) is classified Pathogenic in DES (ClinVar, Single submitter, 1 submitter; last evaluated 2023-03-07). Absent from gnomAD; Associated with myofibrillar myopathy 1.

What condition is associated with DES p.Leu338Arg (c.1013_1014delinsGC)?

DES p.Leu338Arg (c.1013_1014delinsGC) is associated with myofibrillar myopathy 1 (ClinVar).

How common is DES p.Leu338Arg (c.1013_1014delinsGC) in the general population?

DES p.Leu338Arg (c.1013_1014delinsGC) is absent from gnomAD (gnomAD).

How is Desminopathy inherited?

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

DES p.Leu338Arg

c.1013_1014delinsGC · rs2545253453 · VCV2941643

Pathogenic Single submitter

Classification

Pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

myofibrillar myopathy 1

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP 7.9	GERP 1.7, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 7,524 bp · p 0.05 · regional, not allelic

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: DES
Protein: p.Leu338Arg
Coding: c.1013_1014delinsGC
MANE Select: NM_001927
dbSNP: rs2545253453
Type: Indel
Location: chr2:219420943 (GRCh38)
Gene constraint: LOEUF 0.81 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.73
Residue 338: the 'coil 2b' region; the if rod domain; a UniProt-annotated variant site (in mfm1; results in the formation of a filamentous network disrupted by multiple breaks and clumps or large aggregates); the 'interaction with neb' region

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

Disease context

myofibrillar myopathy 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Desminopathy (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: Adolescent, Adult, Childhood, Infancy

Similar variants

DES p.Leu338= Benign ★★ same residue
DES p.Leu338Pro Likely pathogenic ★ same residue
DES p.Ala462Glu Uncertain significance ★★ same condition
DES p.Arg369Cys Uncertain significance ★★ same condition
DES p.Asn116_Asp117delinsTer Pathogenic ★ same condition
DES c.897+13_897+14delinsCT Uncertain significance ★ same condition
DES p.Ala368Val Uncertain significance ★ same condition
DES p.Arg118Leu Uncertain significance ★ 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/des-p-leu338arg (accessed [today's date]).

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