Is DES p.Arg70Trp (c.208C>T) pathogenic?

DES p.Arg70Trp (c.208C>T) is classified Uncertain significance in DES (ClinVar, Single submitter, 1 submitter; last evaluated 2020-02-11). AlphaMissense: likely benign (0.2711); Very rare (popmax 8.6e-05%, nfe); Associated with myofibrillar myopathy 1.

What condition is associated with DES p.Arg70Trp (c.208C>T)?

DES p.Arg70Trp (c.208C>T) is associated with myofibrillar myopathy 1 (ClinVar).

How common is DES p.Arg70Trp (c.208C>T) in the general population?

DES p.Arg70Trp (c.208C>T) is very rare (popmax 8.6e-05%, nfe) (gnomAD).

How is Desminopathy inherited?

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

What do computational predictors say about DES p.Arg70Trp (c.208C>T)?

AlphaMissense predicts likely benign (score 0.2711) — an in-silico prediction, not a clinical call.

DES p.Arg70Trp

c.208C>T · rs2125166022 · VCV1051885

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2711 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.6e-05%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

myofibrillar myopathy 1

Computational evidence

Protein change
AlphaMissense	0.2711	likely benign
REVEL	0.377	indeterminate
SaProt	LLR -9.80	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.7	GERP -0.44, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 7,524 bp · p 0.05 · regional, not allelic
Overall
CADD	27.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.6e-05% European (non-Finnish) · 1/1,163,314 alleles

Overall 7e-05% 1/1,427,842 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.Arg70Trp
Coding: c.208C>T
MANE Select: NM_001927
dbSNP: rs2125166022
Type: single nucleotide variant
Location: chr2:219418670 (GRCh38)
Gene constraint: LOEUF 0.81 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.73
Residue 70: a modified residue (omega-n-methylarginine); 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.Arg70Pro Uncertain significance ★★ ⚠ same residue
DES p.Arg70= Conflicting classifications of pathogenicity ★ same residue
DES p.Arg70Gln 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

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-arg70trp (accessed [today's date]).

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