Is DYNC1H1 p.Arg264Ter (c.790C>T) pathogenic?

DYNC1H1 p.Arg264Ter (c.790C>T) is classified Uncertain significance in DYNC1H1 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-04-06). Absent from gnomAD v4.1; Associated with Charcot-Marie-Tooth disease axonal type 2O.

What condition is associated with DYNC1H1 p.Arg264Ter (c.790C>T)?

DYNC1H1 p.Arg264Ter (c.790C>T) is associated with Charcot-Marie-Tooth disease axonal type 2O (ClinVar).

How common is DYNC1H1 p.Arg264Ter (c.790C>T) in the general population?

DYNC1H1 p.Arg264Ter (c.790C>T) is absent from gnomAD v4.1 (gnomAD).

DYNC1H1 p.Arg264Ter

Q: How is Autosomal dominant Charcot-Marie-Tooth disease type 2O inherited?

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

c.790C>T · rs2503680472 · VCV2122222

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

Charcot-Marie-Tooth disease axonal type 2O

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 in a LoF-intolerant gene
NMD	predicted	premature termination codon in exon 5 of 78
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4	GERP 0.17, phastCons 1
Overall
CADD	37.0	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: DYNC1H1
Protein: p.Arg264Ter
Coding: c.790C>T
MANE Select: NM_001376
dbSNP: rs2503680472
Type: single nucleotide variant
Location: chr14:101980379 (GRCh38)
Gene constraint: LOEUF 0.117 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
Residue 264: the 'stem' region; a UniProt-annotated variant site (in smaled1; slight increased bicd2-binding)

Full DYNC1H1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Charcot-Marie-Tooth disease axonal type 2O — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autosomal dominant Charcot-Marie-Tooth disease type 2O (Orphanet):

Inheritance: Autosomal dominant
Onset: Childhood
Prevalence: <1 / 1 000 000 (Europe)

Similar variants

DYNC1H1 p.Arg264Leu Pathogenic ★★ same residue
DYNC1H1 p.Arg264Gln Conflicting classifications of pathogenicity ★ ⚠ same residue
DYNC1H1 p.Arg264Pro Likely pathogenic ★★ same residue
DYNC1H1 p.Arg1567Gln Pathogenic/Likely pathogenic ★★ same condition
DYNC1H1 p.Arg1623Gln Pathogenic/Likely pathogenic ★★ same condition
DYNC1H1 p.Arg1962Cys Pathogenic ★★ same condition
DYNC1H1 p.Arg1962His Likely pathogenic ★★ same condition
DYNC1H1 p.Arg2332Cys Pathogenic/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/dync1h1-p-arg264ter (accessed [today's date]).

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