KCNQ2 Chromosome 20

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

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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
RS2145774426 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2145774563 Health Risk Likely pathogenic Inborn genetic diseases, Early-infantile DEE, Inborn genetic diseases
RS2145774625 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2145775614 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2145776110 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2145778708 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2145779552 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2145779680 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2145779858 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS2145789008 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2145789218 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Seizures
RS2145789722 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2145920846 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2145921196 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS2516098080 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS2516100518 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS2516104257 Health Risk Likely pathogenic Inborn genetic diseases, Inborn genetic diseases
RS2516117056 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516168233 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516177016 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2516185027 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2516185345 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516188853 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS2516237462 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516310445 Health Risk Likely pathogenic Autosomal dominant epilepsy, Autosomal dominant epilepsy
RS2516364470 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516418447 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2516418712 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516419508 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516420994 Health Risk Likely pathogenic Complex neurodevelopmental disorder, Early-infantile DEE, Complex neurodevelopmental disorder
RS2516421132 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2516421256 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516446102 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE, Early-infantile DEE
RS2516447000 Health Risk Likely pathogenic Seizures, benign familial neonatal, 1
RS2516447591 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2516501169 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516501540 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516502770 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516502806 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS2516505136 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516510450 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516511380 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516511525 Health Risk Likely pathogenic
RS2516532723 Health Risk Likely pathogenic
RS2516742602 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS2516743177 Health Risk Likely pathogenic Seizure, Seizure
RS2516743666 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS371851085 Health Risk Likely pathogenic Early-infantile DEE, Early-infantile DEE
RS570940951 Health Risk Likely pathogenic Developmental and epileptic encephalopathy, 7, Developmental and epileptic encephalopathy
RS752073942 Health Risk Likely pathogenic
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