1. Gene
  2. KCNQ3 - potassium voltage-gated channel subfamily Q member 3 Gene

KCNQ3 - potassium voltage-gated channel subfamily Q member 3 Gene

Homo sapiens

Also known as EBN2; BFNC2; KV7.3

Gene ID: 3786 | Gene type: protein coding

About KCNQ3

Cytogenetic location: 8q24.22 Genomic coordinates (GRCh38): 8:132,120,861-132,481,095 (from NCBI)

This gene has 8 transcripts (splice variants), 193 orthologues, 31 paralogues and is associated with 5 phenotypes. Biased expression in brain (RPKM 5.1) and adrenal (RPKM 0.4).

Summary

This gene encodes a protein that functions in the regulation of neuronal excitability. The encoded protein forms an M-channel by associating with the products of the related KCNQ2 or KCNQ5 genes, which both encode integral membrane proteins. M-channel currents are inhibited by M1 muscarinic acetylcholine receptors and are activated by retigabine, a novel anti-convulsant drug. Defects in this gene are a cause of benign familial neonatal convulsions type 2 (BFNC2), also known as epilepsy, benign neonatal type 2 (EBN2). Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2014]

KCNQ3 Products(2)

mRNA Protein Name
NM_001204824.2 NP_001191753.1 potassium voltage-gated channel subfamily KQT member 3 isoform 2 precursor
NM_004519.4 NP_004510.1 potassium voltage-gated channel subfamily KQT member 3 isoform 1
Gene Ontology
  • Molecular Function
  • Biological Process
  • Cellular Component
Molecular Function GO Annotation Evidence Reference Source
enables calmodulin binding IDA
IDA: Inferred from direct assay
27564677 GOA
enables protein binding IPI
IPI: Inferred from physical interaction
27564677 GOA
enables voltage-gated monoatomic cation channel activity IDA
IDA: Inferred from direct assay
28793216 GOA
enables voltage-gated potassium channel activity IDA
IDA: Inferred from direct assay
11159685 GOA
Biological Process GO Annotation Evidence Reference Source
involved in potassium ion transmembrane transport IDA
IDA: Inferred from direct assay
11159685 GOA
Cellular Component GO Annotation Evidence Reference Source
located in plasma membrane IDA
IDA: Inferred from direct assay
10788442 GOA
part of voltage-gated potassium channel complex IDA
IDA: Inferred from direct assay
11159685 GOA
EXP: Inferred from Experiment IDA: Inferred from direct assay IPI: Inferred from physical interaction IMP: Inferred from mutant phenotype IGI: Inferred from genetic interaction IEP: Inferred from expression pattern

KCNQ3 Protein Structure

Ion_trans

Ion_trans: Ion transport protein (159 - 350)

KCNQ_channel

KCNQ_channel: KCNQ voltage-gated potassium channel (449 - 656)

KCNQC3-Ank-G_bd

KCNQC3-Ank-G_bd: Ankyrin-G binding motif of KCNQ2-3 (770 - 866)

  • 0
  • 200
  • 400
  • 600
  • 800
  • 872 a.a.
Protein Preferred Names Protein Names

potassium voltage-gated channel subfamily KQT member 3

potassium channel subunit alpha KvLQT3

Related Diseases

Diseases Alias
Seizures, Benign Familial Neonatal, 2

BFNS2

Bfnc2

Convulsions, Benign Familial Neonatal, 2

Seizures, Benign Neonatal, 2

Seizures, Benign Familial Neonatal 2

Benign Familial Neonatal Convulsions Type 2

Benign Neonatal Epilepsy 2

Ebn2

Epilepsy, Benign Neonatal, Type 2

Seizures, Neonatal, Benign, Familial, Type 2

Epilepsy, Benign Neonatal, 2

Benign Familial Neonatal Epilepsy

Familial Neonatal Seizures

Bfns

Benign Familial Neonatal Convulsions

Benign Familial Neonatal Seizures

Epilepsy Benign Neonatal Familial

Familial Benign Neonatal Convulsions

Benign Neonatal Familial Convulsions

Familial Benign Neonatal Epilepsy

Epilepsy, Benign Neonatal, 2

Benign Familial Convulsion

Benign Neonatal Seizures

Benign Neonatal Epilepsy

Benign Familial Neonatal Seizures

Benign Neonatal Convulsions

Benign Familial Neonatal Convulsions

Benign Familial Neonatal Epilepsy

Bfne

Bfns

Seizures, Benign Neonatal

Neonatal Convulsions Benign

Epilepsy, Benign Neonatal

Epilepsy, Benign Neonatal, 2

Benign Familial Convulsion

Familial Benign Neonatal Epilepsy

Convulsions Benign Familial Neonatal Dominant Form

Autosomal Dominant Form Of Benign Neonatal Seizures

Benign Familial Neonatal Convulsions

Benign Familial Neonatal Seizures

Epilepsy, Benign Neonatal, 2

Familial Benign Neonatal Epilepsy

Benign Familial Convulsion

Kcnq3-Related Disorders
Seizures, Benign Familial Infantile, 5

BFIS5

Convulsions, Benign Familial Infantile, 5

Bfic5

Benign Familial Infantile Seizures 5

Benign Familial Infantile Seizures, 5

Benign Familial Infantile Convulsions 5

Benign Epilepsy With Centrotemporal Spikes

Rolandic Epilepsy

Benign Rolandic Epilepsy

Epilepsy, Rolandic

Bcects

Benign Childhood Epilepsy With Centrotemporal Spike

Sylvan Seizures

Becrs

Bects

Bre

Benign Epilepsy Of Childhood With Centrotemporal Spikes

Benign Familial Epilepsy Of Childhood With Rolandic Spikes

Centrotemporal Epilepsy

Benign Familial Infantile Epilepsy

Benign Familial Infantile Seizures

Bfie

Benign Familial Infantile Convulsion

Bfic

Bfis

Benign Familial Infantile Convulsions

Familial Benign Neonatal Epilepsy

Watanabe-Vigevano Syndrome

Epilepsy, Myoclonic Juvenile

Juvenile Myoclonic Epilepsy

Janz Syndrome

Jme

Myoclonic Epilepsy, Juvenile, Susceptibility To, 1

EJM

Myoclonic Epilepsy, Juvenile

Petit Mal, Impulsive

Myoclonic Epilepsy, Juvenile 1

Myoclonic Epilepsy, Juvenile, 1

Adolescent Myoclonic Epilepsy

Juvenile Myoclonus Epilepsy

Juvenile Myoclonic Epilepsy 1

EJM1

Petit Mal Impulsive

Susceptibility To Juvenile Myoclonic Epilepsy 1

Myoclonic Epilepsy Juvenile

Epilepsy, Myoclonic, Juvenile

Myoclonic Epilepsy Of Janz

Jme - [Juvenile Myoclonic Epilepsy]

Epilepsy

Epilepsy Syndrome

Epileptic Syndrome

Epilepsies

Symptomatic Epilepsies

Post Traumatic Epilepsy

Traumatic Epilepsy

Traumatic Epileptic

Epilepsy Due To Hippocampal Sclerosis

Epilepsy With Ammon'S Horn Sclerosis

Epilepsy Due To Cortical Dysplasia

Epilepsy Due To Neuronal Migration Disorders

Epilepsy, Idiopathic Generalized

Idiopathic Generalized Epilepsy

Generalised Epilepsy

Epilepsy, Generalized

EIG

Ige

Epilepsy, Idiopathic Generalized, Susceptibility To, 1

Epilepsy, Idiopathic Generalized 1

Epilepsy, Idiopathic Generalized, Susceptibility To

Epilepsy, Idiopathic, Generalized

Epilepsy, Idiopathic, Generalized, Susceptibility To, Type 1

Neonatal Period Electroclinical Syndrome
Developmental And Epileptic Encephalopathy 7

Epileptic Encephalopathy, Early Infantile, 7

DEE7

Eiee7

Kcnq2-Related Epileptic Encephalopathy

Kcnq2-Related Neonatal Epileptic Encephalopathy

Developmental And Epileptic Encephalopathy, 7

Early Infantile Epileptic Encephalopathy 7

Kcnq2-Nee

Ohtahara Syndrome

Encephalopathy, Epileptic, Early Infantile, Type 7

Early Infantile Epileptic Encephalopathy With Suppression Bursts

Developmental And Epileptic Encephalopathy 54

DEE54

Epileptic Encephalopathy, Early Infantile, 54

Eiee54

Developmental And Epileptic Encephalopathy, 54

Early Infantile Epileptic Encephalopathy 54

Encephalopathy, Epileptic, Early Infantile, Type 54

Autosomal Dominant Nocturnal Frontal Lobe Epilepsy

Adnfle

Autosomal Dominant Sleep-Related Hypermotor Epilepsy

Enfl

Benign Familial Infantile Seizures 6

Benign Familial Infantile Seizures, 6

Nocturnal Frontal Lobe Epilepsy-4

Enfl1

Epilepsy, Nocturnal Frontal Lobe, 1

Epilepsy, Nocturnal Frontal Lobe, Type 1

Long Qt Syndrome

Romano-Ward Syndrome

Long Q-T Syndrome

Lqt

Qt Syndrome, Long

Congenital Long Qt Syndrome

Familial Long Qt Syndrome

Episodic Ataxia, Type 1

Episodic Ataxia Type 1

Episodic Ataxia/Myokymia Syndrome

EA1

Episodic Ataxia With Myokymia

Eam

Ataxia, Episodic, With Myokymia

Aem

Paroxysmal Ataxia With Neuromyotonia, Hereditary

Myokymia With Periodic Ataxia

Episodic Ataxia 1

Aemk

Ea-1

Paroxysmal Ataxia With Neuromyotonia

Myokymia Isolated 1

MK1

Ataxia, Episodic, Type 1

Continuous Muscle Fiber Activity, Hereditary

Isaacs Syndrome

Infancy Electroclinical Syndrome
Early Onset Absence Epilepsy
Generalized Epilepsy With Febrile Seizures Plus

Gefs+

Genetic Epilepsy With Febrile Seizures Plus

Generalized Epilepsy With Febrile Seizures-Plus

Genetic Epilepsy With Febrile Seizures-Plus

Epilepsy, Generalized, With Febrile Seizures Plus

Childhood Electroclinical Syndrome
Episodic Ataxia

Isaacs Syndrome

Neuromyotonia

Isaacs' Syndrome

Acquired Neuromyotonia

Continuous Muscle Fiber Activity Syndrome

Quantal Squander Syndrome

Isaacs-Mertens Syndrome

Ea Syndrome

Episodic Ataxia Syndrome

Isaac Syndrome

Isaac'S-Merten'S Syndrome

Isaac-Mertens Syndrome

Peripheral Nerve Hyperexcitability

Ea

Peripheral Nerve Hyperexcitability Syndrome

Ataxia, Episodic

Isaacs Neuromyotonia

Continuous Muscle Fibre Activity

Adolescence-Adult Electroclinical Syndrome
Unverricht-Lundborg Syndrome

Unverricht-Lundborg Disease

Epm1

Myoclonic Epilepsy Of Unverricht And Lundborg

Myoclonus Progressive Epilepsy Of Unverricht And Lundborg

Unverricht - Lundborg Disease

Unverricht'S Disease

Epilepsy, Progressive Myoclonic Type 1

Epilepsy, Progressive Myoclonus 1

Progressive Myoclonus Epilepsy Baltic Myoclonic Epilepsy

Baltic Myoclonic Epilepsy

Baltic Myoclonus

Baltic Myoclonus Epilepsy

Lundborg-Unverricht Syndrome

Mediterranean Myoclonic Epilepsy

Pme

Progressive Myoclonic Epilepsy

Progressive Myoclonus Epilepsy 1

Uld

Myoclonic Epilepsies, Progressive

Lennox-Gastaut Syndrome

Lennox Syndrome

Encephalopathy Of Childhood

Epileptic Encephalopathy Lennox-Gastaut Type

Childhood Epileptic Encephalopathy With Diffuse Slow Spikes And Waves

Lgs

Dravet Syndrome

Severe Myoclonic Epilepsy Of Infancy

Severe Myoclonic Epilepsy In Infancy

Smei

Epileptic Encephalopathy, Early Infantile, 6

DRVT

Developmental And Epileptic Encephalopathy 6a

Dee6a

Eiee6

Developmental And Epileptic Encephalopathy, 6

Dee6

Developmental And Epileptic Encephalopathy 6

Early Infantile Epileptic Encephalopathy 6

Myoclonic Epilepsy, Severe, Of Infancy

Sme

Severe Myoclonus Epilepsy Of Infancy

Borderline Smei

Smeb

Smeb-M

Smeb-O

Smeb-Sw

Smei-Borderland

Smei-Borderland More Than One Feature

Smei-Borderland-Myoclonic Seizures

Smei-Borderland-Spike Wave

Intractable Childhood Epilepsy With Generalized Tonic-Clonic Seizures

ICEGTC

Infantile Severe Myoclonic Epilepsy

Epilepsy, Intractable Childhood, With Generalized Tonic-Clonic Seizures

Photosensitive Epilepsy

Pse

Photogenic Epilepsy

Photoparoxysmal Response

Reflex Epilepsy, Photosensitive

Photoparoxysmal Response 1

Trichorhinophalangeal Syndrome, Type Ii

Langer-Giedion Syndrome

Lgs

Trichorhinophalangeal Syndrome Type Ii

Trichorhinophalangeal Syndrome Type 2

TRPS2

Monosomy 8q24.1

Chromosome 8q24.1 Deletion Syndrome

Deletion 8q24.1

Giedion-Langer Syndrome

Trichorhinophalangeal Dysplasia Type Ii

Langer Giedion Syndrome

Trps 2

Tricho-Rhino-Phalangeal Syndrome Type Ii

Trichorhinophalangeal Syndrome With Exostosis

Trps Ii

Tricho-Rhino-Phalangeal Syndrome 2

8q24.1 Microdeletion Syndrome

8q24.1 Deletion Syndrome

Long Qt Syndrome 1

Romano-Ward Syndrome

LQT1

Ward-Romano Syndrome

Rws

Ventricular Fibrillation With Prolonged Qt Interval

Wrs

Long Qt Syndrome 1, Acquired, Susceptibility To

Long Qt Syndrome 1, Acquired

Romano-Ward Long Qt Syndrome

Long Qt Syndrome Type 1

Long Qt Syndrome-1

Acquired Susceptibility To Long Qt Syndrome 1

Qt Syndrome, Long, Type 1

Early Myoclonic Encephalopathy

Myoclonic Epilepsy

Myoclonic Seizure

Epilepsies, Myoclonic

Epileptic Seizures - Myoclonic

Epileptic Seizures, Myoclonic

Myoclonia Epileptica

Myoclonic Seizure Disorder

Early Myoclonic Encephalopathy With Suppression-Bursts

Epilepsy, Pyridoxine-Dependent

Pyridoxine-Dependent Epilepsy

PDE

Pyridoxine Dependency With Seizures

Vitamin B6-Dependent Seizures

EPD

Aasa Dehydrogenase Deficiency

Antiquitin Deficiency

Pyridoxine Dependency

Glutamate Decarboxylase Deficiency

Pyridoxine-Dependent Seizures

Deficiency Of Glutamate Decarboxylase

Early Infantile Epileptic Encephalopathy

Early Infantile Epileptic Encephalopathy With Burst-Suppression

Early Infantile Epileptic Encephalopathy With Suppression Bursts

Eiee

Early Infantile Epileptic Encephalopathy With Suppression-Bursts

Ohtahara Syndrome

Encephalopathy, Epileptic, Early Infantile

Childhood Absence Epilepsy

Pyknolepsy

Petit Mal Epilepsy

Absence Seizures

Absence Seizure

Petit Mal Seizure

Absence Epilepsy, Childhood

Pykno-Epilepsy

Epilepsy, Absence

Absence Epilepsy

Pycnolepsy

West Syndrome

Infantile Spasms

Infantile Spasms Syndrome

Infantile Spasm

X-Linked Infantile Spasm Syndrome

X-Linked Infantile Spasms

Epileptic Encephalopathy, Early Infantile, 1

Is

Tonic Spasms With Clustering, Arrest Of Psychomotor Development And Hypsarrhythmia On Eeg

West'S Syndrome

Spasms, Infantile

Is -[Infantile Spasm]

Salaam Spasm

Salaam Tic

Autism

Autistic Disorder

Autism Susceptibility 1

Childhood Autism

Autistic Disorder Of Childhood Onset

Infantile Autism

Kanner'S Syndrome

Autistic

Progressive Myoclonus Epilepsy

Pme

Progressive Myoclonic Epilepsy

Myoclonic Epilepsies, Progressive

Unverricht-Lundborg Syndrome

Developmental And Epileptic Encephalopathy

Encephalopathy, Developmental And Epileptic

Migraine With Or Without Aura 1

Migraine

Migraine With Or Without Aura, Susceptibility To, 1

Migraine Disorder

Migraine Variant

Migraines

Migraine Disorders

Mgr1

Mgau

Ma

Migraine With Or Without Aura

Classic Migraine

Common Migraine

Disorder, Migraine

Headache Migraine

Headache Migrainous

Migraine Headache

Migraine Syndrome

Headache Including Migraine

Migraine, Susceptibility To

Diseases Alias
Waldenstroem'S Macroglobulinemia

Waldenstroem'S Macroglobulinemia

Waldenstroem'S Macroglobulinemia

Macroglobulinemia Of Waldenstrom

Lymphoplasmacytic Lymphoma With Igm Gammopathy

Lymphoplasmacytic Lymphoma

Waldenstroem'S Macroglobulinemia

Waldenstroem'S Macroglobulinemia

Macroglobulinemia Of Waldenstrom

Lymphoplasmacytic Lymphoma With Igm Gammopathy

Lymphoplasmacytic Lymphoma

Orthologs Information

Species Symbol Source ID
Bos taurus KCNQ3 VGNC VGNC:30488
Canis familiaris KCNQ3 VGNC VGNC:42289
Felis catus KCNQ3 VGNC VGNC:67930
Rattus norvegicus KCNQ3 RGD RGD:69222
Mus musculus KCNQ3 MGD MGI:1336181
Macaca mulatta KCNQ3 VGNC VGNC:74006