congenital myasthenic syndrome 1A

Summary
Synonym
  • CMS IIa
  • CMS1A
  • congenital myasthenic syndrome 1A, slow-channel
  • congenital myasthenic syndrome type IIa
Definition
A congenital myasthenic syndrome characterized by predominantly autosomal dominant inheritance of defects in postsynaptic neuromuscular junctions and early-onset progressive muscle weakness that has_material_basis_in mutation in the CHRNA1 gene on chromosome 2q.
Super Class
autosomal dominant disease congenital myasthenic syndrome
Disease Ontology
DOID:0110663
Related Genes
Displaying all 2 entries
Gene ID Gene Symbol Description Source
831 CAST calpastatin
1134 CHRNA1 cholinergic receptor nicotinic alpha 1 subunit
Related Glycoprotein
The Human Phenotype Ontology
Displaying entries 1 - 10 of 32 in total
HPO ID HPO Term
HP:0002878 Respiratory failure
HP:0001324 Muscle weakness
HP:0003547 Shoulder girdle muscle weakness
HP:0000597 Ophthalmoparesis
HP:0003403 EMG: decremental response of compound muscle action potential to repetitive nerve stimulation
HP:0009005 Weakness of the intrinsic hand muscles
HP:0002329 Drowsiness
HP:0000496 Abnormality of eye movement
HP:0003388 Easy fatigability
HP:0003803 Type 1 muscle fiber predominance
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: December 8, 2025