KCNQ2 Chromosome 20

Potassium voltage-gated channel subfamily Q member 2
658 variants 658 Health Risk

Upload your DNA to see your personal genotypes for variants in KCNQ2.

What This Gene Does
The M channel is a slowly activating and deactivating potassium channel that plays a critical role in the regulation of neuronal excitability. The M channel is formed by the association of the protein encoded by this gene and a related protein encoded by the KCNQ3 gene, both integral membrane proteins. M channel currents are inhibited by M1 muscarinic acetylcholine receptors and activated by retigabine, a novel anti-convulsant drug. Defects in this gene are a cause of benign familial neonatal convulsions type 1 (BFNC), also known as epilepsy, benign neonatal type 1 (EBN1). At least five transcript variants encoding five different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]
Gene Info
Gene Group
Potassium voltage-gated channels
Locus Type
gene with protein product
Location
20q13.33
Ensembl
ENSG00000075043
Associated Conditions (35)
Seizures
benign familial neonatal
1
Developmental and epileptic encephalopathy
7
Inborn genetic diseases
Early-infantile DEE
Epileptic encephalopathy
Complex neurodevelopmental disorder
Paroxysmal central nervous system disorders
KCNQ2-related disorder
Seizure
See cases
Neonatal encephalopathy
Continuous spike and waves during slow sleep
Intellectual disability
Epilepsy
benign neonatal
and/or myokymia
Autosomal dominant epilepsy
+15 more conditions
Key Variants
All Variants (658)
RSID Category Clinical Significance Conditions
RS796052656 Health Risk Conflicting classifications of pathogenicity Complex neurodevelopmental disorder, Early-infantile DEE, Complex neurodevelopmental disorder
RS868761735 Health Risk Conflicting classifications of pathogenicity Early-infantile DEE, Early-infantile DEE
RS886041860 Health Risk Conflicting classifications of pathogenicity KCNQ2-related disorder, Early-infantile DEE, KCNQ2-related disorder
RS886056921 Health Risk Conflicting classifications of pathogenicity Developmental and epileptic encephalopathy, 7, Early-infantile DEE
RS897976020 Health Risk Conflicting classifications of pathogenicity Developmental and epileptic encephalopathy, 7, Inborn genetic diseases
RS908502131 Health Risk Conflicting classifications of pathogenicity Seizures, benign familial neonatal, 1
RS915805727 Health Risk Conflicting classifications of pathogenicity Inborn genetic diseases, See cases, Early-infantile DEE
RS1057516076 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1057516077 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, KCNQ2-related disorder
RS1057516083 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS1057516089 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1057516093 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS1057516097 Health Risk Likely pathogenic
RS1057516100 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Early-infantile DEE
RS1057516103 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS1057516105 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1057516106 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1057516111 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1057516123 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1057517919 Health Risk Likely pathogenic Seizure, KCNQ2-related disorder, Epilepsy
RS1057518068 Health Risk Likely pathogenic
RS1057518489 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Early-infantile DEE
RS1057518619 Health Risk Likely pathogenic
RS1057524599 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS1057524860 Health Risk Likely pathogenic
RS1060499545 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS1060500603 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS1064793392 Health Risk Likely pathogenic KCNQ2-related disorder, KCNQ2-related disorder
RS1064794686 Health Risk Likely pathogenic
RS1064795435 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS1064796535 Health Risk Likely pathogenic
RS1064796940 Health Risk Likely pathogenic
RS1064797285 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS1085307920 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Seizures
RS1131691356 Health Risk Likely pathogenic
RS118192216 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS118192217 Health Risk Likely pathogenic Seizure, Seizures, benign familial neonatal
RS118192221 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS118192225 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS118192234 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1241388377 Health Risk Likely pathogenic Seizure, Seizure
RS1272165811 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS1307396168 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1371059392 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS1392647178 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS1394738986 Health Risk Likely pathogenic
RS1409265816 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS147882199 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS1555853524 Health Risk Likely pathogenic
RS1555853593 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Early-infantile DEE
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