Genes in panel

Early onset or syndromic epilepsy

Gene: KCNJ4

No list

KCNJ4 (potassium voltage-gated channel subfamily J member 4)
EnsemblGeneIds (GRCh38): ENSG00000168135
EnsemblGeneIds (GRCh37): ENSG00000168135
OMIM: 600504, Gene2Phenotype
KCNJ4 is in 1 panel

1 review

Alexander Symon-Allen (Genetics Laboratory, Oxford UK)

I don't know

1 study outlines four unrelated individuals with epilepsy with or without developmental delay that harbour four unique heterozygous KCNJ4 variants - 3 de novo, 1 inherited from an affected parent.
Other inwardly rectifying potassium (Kir) channels have been implicated in epilepsy.
Patch clamp studies provide preliminary evidence for both loss of function (Val206Met & Met293Lys) and gain of function (Gly136Ser & Glu384Lys) mechanisms.
Further independent studies required to confirm this association.
Sources: Literature
Created: 15 Apr 2026, 11:04 a.m.

Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted

Phenotypes
Epileptic encephalopathy; Epilepsy; Developmental delay.

Publications

Mode of pathogenicity
Other

Details

Mode of Inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Sources
Phenotypes
  • Epileptic encephalopathy
  • Epilepsy
  • Developmental delay.
OMIM
600504
Clinvar variants
Variants in KCNJ4
Penetrance
unknown
Publications
Mode of Pathogenicity
Other
Panels with this gene

History Filter Activity

15 Apr 2026, Gel status: 0

Created, Added New Source, Set mode of inheritance, Set publications, Set Phenotypes, Set penetrance, Set mode of pathogenicity

Alexander Symon-Allen (Genetics Laboratory, Oxford UK)

gene: KCNJ4 was added gene: KCNJ4 was added to Early onset or syndromic epilepsy. Sources: Literature Mode of inheritance for gene: KCNJ4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: KCNJ4 were set to PMID: 41830586 Phenotypes for gene: KCNJ4 were set to Epileptic encephalopathy; Epilepsy; Developmental delay. Penetrance for gene: KCNJ4 were set to unknown Mode of pathogenicity for gene: KCNJ4 was set to Other Review for gene: KCNJ4 was set to AMBER