congenital myasthenic syndrome 3B

Summary
Synonym
  • CMS3B
  • congenital myasthenic syndrome 3B, fast-channel
Definition
A congenital myasthenic syndrome characterized by autosomal recessive inheritance of postsynaptic neuromuscular junction defects resulting in rapid decay in endplate current and a failure to reach the threshold for depolarization and early onset progressive muscular weakness that has_material_basis_in homozygous or compound heterozygous mutation in the CHRND gene on chromosome 2q37.
Super Class
autosomal recessive disease congenital myasthenic syndrome
Disease Ontology
DOID:0110665
Related Genes
Displaying 1 entry
Gene ID Gene Symbol Description Source
1144 CHRND cholinergic receptor nicotinic delta subunit
Related Glycoprotein
Displaying 1 entry
UniProt ID Protein Name Source
Q07001 Acetylcholine receptor subunit delta
The Human Phenotype Ontology
Displaying entries 21 - 30 of 32 in total
HPO ID HPO Term
HP:0002650 Scoliosis
HP:0000651 Diplopia
HP:0003443 Decreased size of nerve terminals
HP:0012515 Hip flexor weakness
HP:0002875 Exertional dyspnea
HP:0001315 Reduced tendon reflexes
HP:0003484 Upper limb muscle weakness
HP:0000508 Ptosis
HP:0003402 Decreased miniature endplate potentials
HP:0005659 Thoracic kyphoscoliosis
Displaying 1 entry
Gene ID Gene Symbol Description
375790 AGRN agrin

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Acknowledgements

Supported by JST NBDC Grant Number JPMJND2204

Partly supported by NIH Common Fund Grant #1U01GM125267-01


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Last updated: April 6, 2026