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SCN4A

sodium voltage-gated channel alpha subunit 4

HCNC Approved Symbol
SCN4A (HGNC:10591)
Genomic Coordinates
17:63,938,554 - 63,972,918 (17q23.3)
Synonyms
Nav1.4, HYPP, SkM1, HYKPP
Disease Associations
This gene is associated with the following 7 diseases in OMIM.
View More Disease Info
Disease NameOMIM IDInheritance
Congenital myopathy 22A, classic
620351AR
Congenital myopathy 22B, severe fetal
620369AR
Hyperkalemic periodic paralysis
170500AD
Hypokalemic periodic paralysis, type 2
613345AD
Myasthenic syndrome, congenital, 16
614198AR
Myotonia congenita, atypical, acetazolamide-responsive
608390AD
Paramyotonia congenita
168300AD

Diagnosed Cases

27Patients

In total, 27 patients were diagnosed with a variant in the SCN4A gene.

Frequently observed phenotypes

(Top 5 only, Patient count*)
*% of total patients presenting each phenotype is shown in parentheses.

Myotonia
 8 (29.6%)
Dysarthria
 
3 (11.1%)
Neonatal hypotonia
 
2 (7.4%)
Neonatal seizure
 
2 (7.4%)
Poor suck
 
2 (7.4%)