Is DES p.Gln55Ter (c.163C>T) pathogenic?

DES p.Gln55Ter (c.163C>T) is classified Pathogenic/Likely pathogenic in DES (ClinVar, Multiple submitters, 2 submitters; last evaluated 2023-05-13). Very rare (popmax 0.00224%, sas); Associated with myofibrillar myopathy 1.

What condition is associated with DES p.Gln55Ter (c.163C>T)?

DES p.Gln55Ter (c.163C>T) is associated with myofibrillar myopathy 1 (ClinVar).

How common is DES p.Gln55Ter (c.163C>T) in the general population?

DES p.Gln55Ter (c.163C>T) is very rare (popmax 0.00224%, sas) (gnomAD).

How is Desminopathy inherited?

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

DES p.Gln55Ter

c.163C>T · rs1954365477 · VCV2941160

Pathogenic/Likely pathogenic Multiple submitters

Classification

Pathogenic/Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Rare

very rare (popmax 0.00224%, sas)

Conditions

myofibrillar myopathy 1

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function
NMD	predicted	premature termination codon in exon 1 of 9
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.4	GERP 0.57, phastCons 1
Overall
CADD	42.0	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

Grpmax group 0.00224% South Asian · 2/89,416 alleles

Filtering AF 0.000371% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000139%

Overall 0.000138% 2/1,449,654 alleles · very rare

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: DES
Protein: p.Gln55Ter
Coding: c.163C>T
MANE Select: NM_001927
dbSNP: rs1954365477
Type: single nucleotide variant
Location: chr2:219418625 (GRCh38)
Gene constraint: LOEUF 0.81 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.73
Residue 55: the 'head' 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.Gln55Leu Uncertain significance ★ ⚠ same residue
DES c.1289-2A>G Pathogenic/Likely pathogenic ★★ same condition
DES c.579-2A>C Likely pathogenic ★★ same condition
DES c.735+1G>A Pathogenic/Likely pathogenic ★★ same condition
DES c.735+1G>C Pathogenic/Likely pathogenic ★★ same condition
DES c.735+3A>G Pathogenic ★★ same condition
DES p.Ala120Pro Pathogenic/Likely pathogenic ★★ same condition
DES p.Ala285Val 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/des-p-gln55ter (accessed [today's date]).

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