Kcnd2 potassium voltage-gated channel subfamily D member 2 [Rattus norvegicus (Norway rat)] - Gene

Summary

Official Symbol: Kcnd2provided by RGD
Official Full Name: potassium voltage-gated channel subfamily D member 2provided by RGD
Primary source: RGD:68393
See related: Ensembl:ENSRNOG00000067416 AllianceGenome:RGD:68393
Gene type: protein coding
RefSeq status: VALIDATED
Organism: Rattus norvegicus
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Glires; Rodentia; Myomorpha; Muroidea; Muridae; Murinae; Rattus
Also known as: RK5; Kv4.2; Shal1
Summary: Enables A-type (transient outward) potassium channel activity. Involved in several processes, including cellular response to hypoxia; cellular response to mechanical stimulus; and potassium ion transmembrane transport. Located in several cellular components, including T-tubule; neuronal cell body membrane; and perinuclear endoplasmic reticulum. Part of voltage-gated potassium channel complex. Is active in glutamatergic synapse and postsynaptic membrane. Orthologous to human KCND2 (potassium voltage-gated channel subfamily D member 2). [provided by Alliance of Genome Resources, Jul 2025]
Expression: Biased expression in Brain (RPKM 229.7), Heart (RPKM 39.1) and 1 other tissue See more
Orthologs: all
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Genomic context

Location:: 4q22

Exon count:: 7

Annotation release	Status	Assembly	Chr	Location
RS_2024_02	current	GRCr8 (GCF_036323735.1)	4	NC_086022.1 (50741595..51243540)
RS_2023_06	previous assembly	mRatBN7.2 (GCF_015227675.2)	4	NC_051339.1 (49775812..50277746)

Chromosome 4 - NC_086022.1 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: A rat RNA-Seq transcriptomic BodyMap across 11 organs and 4 developmental stages
Description: 320 RNA samples isolated from 11 organs (adrenal gland, brain, heart, kidney, liver, lung, muscle, spleen, thymus, and testes or uterus) from both sexes of Fischer 344 rats across four developmental stages (2-, 6-, 21-, and 104-weeks-old)
BioProject: PRJNA238328
Publication: PMID 24510058
Analysis date: Mon Jun 6 17:44:12 2016

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Magnesium Deficiency Causes Transcriptional Downregulation of Kir2.1 and Kv4.2 Channels in Cardiomyocytes Resulting in QT Interval Prolongation.
Title: Magnesium Deficiency Causes Transcriptional Downregulation of Kir2.1 and Kv4.2 Channels in Cardiomyocytes Resulting in QT Interval Prolongation.
Immunogold staining and electron microscopy of heart vibrosections was performed to localize Kv4.2/Kv4.3 and Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) proteins. Patch-Clamp recordings in control conditions and after lipid raft or caveolae disruption show that the CaMKII-Kv4 channel complex must associate in non-caveolar lipid rafts to be functional.
Title: CaMKII Modulates the Cardiac Transient Outward K(+) Current through its Association with Kv4 Channels in Non-Caveolar Membrane Rafts.
Study revealed that ERK5 signaling promotes phosphorylation of Kv4.2 and inhibits the inactivation of the A-type current for the enhancement of membrane excitability in PC12 cells.
Title: ERK5 Phosphorylates K(v)4.2 and Inhibits Inactivation of the A-Type Current in PC12 Cells.
Results showed: (i) seizures are associated with more brain damage and neuronal damage is not the major contributor of seizure generation in ischemic rats; (ii) the expression of IA channel subunit Kv4.2 is selectively reduced in ischemic rats with spontaneous behavioral seizures; (iii) The reduction of Kv4.2 may be associated with the long-term increased seizure susceptibility of ischemic rats.
Title: Reduced expression of IA channels is associated with post-ischemic seizures.
NMDA reduced both currents in a concentration-dependent manner, whereas there was no significant impact on the currents when perfused with MK-801. MDD rats exhibited significantly more fibrosis areas in heart tissue and reduced expression of Kv4.2, Kv4.3, and Cav1.2.
Title: The activation of N-methyl-d-aspartate receptors downregulates transient outward potassium and L-type calcium currents in rat models of depression.
Data show that voltage-gated K+ channel Kv4.2 as a target gene of microRNA miR-223-3p.
Title: MiR-223-3p as a Novel MicroRNA Regulator of Expression of Voltage-Gated K+ Channel Kv4.2 in Acute Myocardial Infarction.
17betaestradiol suppresses epileptiform activity by enhancing Kv4.2-mediated transient outward potassium currents in primary hippocampal neurons.
Title: Estrogen suppresses epileptiform activity by enhancing Kv4.2-mediated transient outward potassium currents in primary hippocampal neurons.
The study provides the first piece of evidence for the role of H2S in regulating Ito potassium channels and also the specific motif in an ion channel labile for H2S regulation.
Title: Hydrogen Sulfide Targets the Cys320/Cys529 Motif in Kv4.2 to Inhibit the Ito Potassium Channels in Cardiomyocytes and Regularizes Fatal Arrhythmia in Myocardial Infarction.
The rsults of this study suggested that the reduction of Kv4.2 expression could contribute to the development of postischemic seizures in hyperglycemia.
Title: Reduced expression of IA channels is associated with postischemic seizures in hyperglycemic rats.
Subunit counting by single-molecule imaging revealed that the bound number of KChIP4 in each Kv4.2.KChIP4 complex was dependent on the expression level of KChIP4.
Title: The stoichiometry and biophysical properties of the Kv4 potassium channel complex with K+ channel-interacting protein (KChIP) subunits are variable, depending on the relative expression level.

Submit: New GeneRIF Correction See all GeneRIFs (63)

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

BF390067 (e-PCR)
- UniSTS:249376

RH138133 (e-PCR)
- UniSTS:220220

D4Got29 (e-PCR)
- UniSTS:111946

RH144078 (e-PCR)
- UniSTS:233324

d4rat15 (e-PCR)
- UniSTS:121968

UniSTS:498320 (e-PCR)
- UniSTS:498320

Kcnd2 (e-PCR), detects polymorphism
- UniSTS:498320

Gene Ontology Provided by RGD

Function	Evidence Code	Pubs
enables A-type (transient outward) potassium channel activity	IBA Inferred from Biological aspect of Ancestor more info
enables A-type (transient outward) potassium channel activity	IDA Inferred from Direct Assay more info	PubMed
enables A-type (transient outward) potassium channel activity	IEA Inferred from Electronic Annotation more info
enables A-type (transient outward) potassium channel activity	IMP Inferred from Mutant Phenotype more info	PubMed
enables A-type (transient outward) potassium channel activity	ISO Inferred from Sequence Orthology more info
enables monoatomic ion channel activity	IDA Inferred from Direct Assay more info	PubMed
enables monoatomic ion channel activity	IEA Inferred from Electronic Annotation more info
enables potassium channel activity	IDA Inferred from Direct Assay more info	PubMed
enables protein-containing complex binding	IDA Inferred from Direct Assay more info	PubMed
enables voltage-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential	IBA Inferred from Biological aspect of Ancestor more info
enables voltage-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential	ISO Inferred from Sequence Orthology more info
enables voltage-gated potassium channel activity	IDA Inferred from Direct Assay more info	PubMed
enables voltage-gated potassium channel activity	IEA Inferred from Electronic Annotation more info
enables voltage-gated potassium channel activity	IMP Inferred from Mutant Phenotype more info	PubMed
enables voltage-gated potassium channel activity	ISO Inferred from Sequence Orthology more info

Process	Evidence Code	Pubs
involved_in action potential	IBA Inferred from Biological aspect of Ancestor more info
involved_in action potential	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within action potential	ISO Inferred from Sequence Orthology more info
involved_in action potential	ISO Inferred from Sequence Orthology more info
involved_in cardiac muscle cell action potential	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in cellular response to hypoxia	IDA Inferred from Direct Assay more info	PubMed
involved_in cellular response to mechanical stimulus	IEP Inferred from Expression Pattern more info	PubMed
involved_in cellular response to xenobiotic stimulus	IEP Inferred from Expression Pattern more info	PubMed
involved_in locomotor rhythm	ISO Inferred from Sequence Orthology more info
involved_in membrane repolarization	ISO Inferred from Sequence Orthology more info
involved_in monoatomic ion transport	IEA Inferred from Electronic Annotation more info
involved_in muscle contraction	ISO Inferred from Sequence Orthology more info
involved_in neuronal action potential	ISO Inferred from Sequence Orthology more info
involved_in potassium ion transmembrane transport	IBA Inferred from Biological aspect of Ancestor more info
involved_in potassium ion transmembrane transport	IDA Inferred from Direct Assay more info	PubMed
involved_in potassium ion transmembrane transport	ISO Inferred from Sequence Orthology more info
involved_in potassium ion transport	IEA Inferred from Electronic Annotation more info
involved_in potassium ion transport	TAS Traceable Author Statement more info	PubMed
involved_in protein homooligomerization	IEA Inferred from Electronic Annotation more info
involved_in regulation of postsynaptic membrane potential	IEA Inferred from Electronic Annotation more info
involved_in sensory perception of pain	ISO Inferred from Sequence Orthology more info
involved_in transmembrane transport	IEA Inferred from Electronic Annotation more info

Component	Evidence Code	Pubs
is_active_in GABA-ergic synapse	ISO Inferred from Sequence Orthology more info
part_of Kv4.2-KChIP2 channel complex	ISO Inferred from Sequence Orthology more info
located_in T-tubule	IDA Inferred from Direct Assay more info	PubMed
located_in anchoring junction	EXP Inferred from Experiment more info	PubMed
located_in anchoring junction	IEA Inferred from Electronic Annotation more info
located_in caveola	IDA Inferred from Direct Assay more info	PubMed
located_in caveola	IEA Inferred from Electronic Annotation more info
located_in dendrite	IDA Inferred from Direct Assay more info	PubMed
located_in dendrite	IEA Inferred from Electronic Annotation more info
located_in dendrite	ISO Inferred from Sequence Orthology more info
is_active_in dendritic spine	IBA Inferred from Biological aspect of Ancestor more info
located_in dendritic spine	IDA Inferred from Direct Assay more info	PubMed
located_in dendritic spine	IEA Inferred from Electronic Annotation more info
located_in dendritic spine	ISO Inferred from Sequence Orthology more info
is_active_in glutamatergic synapse	IDA Inferred from Direct Assay more info	PubMed
is_active_in glutamatergic synapse	ISO Inferred from Sequence Orthology more info
located_in membrane	IEA Inferred from Electronic Annotation more info
located_in membrane	ISO Inferred from Sequence Orthology more info
is_active_in neuronal cell body	IBA Inferred from Biological aspect of Ancestor more info
located_in neuronal cell body	IDA Inferred from Direct Assay more info	PubMed
located_in neuronal cell body	ISO Inferred from Sequence Orthology more info
located_in neuronal cell body membrane	IDA Inferred from Direct Assay more info	PubMed
located_in perikaryon	EXP Inferred from Experiment more info	PubMed
located_in perikaryon	IEA Inferred from Electronic Annotation more info
located_in perikaryon	ISO Inferred from Sequence Orthology more info
located_in perinuclear endoplasmic reticulum	IDA Inferred from Direct Assay more info	PubMed
located_in perinuclear endoplasmic reticulum	IEA Inferred from Electronic Annotation more info
located_in plasma membrane	EXP Inferred from Experiment more info	PubMed
located_in plasma membrane	IDA Inferred from Direct Assay more info	PubMed
located_in plasma membrane	IEA Inferred from Electronic Annotation more info
located_in plasma membrane	IMP Inferred from Mutant Phenotype more info	PubMed
located_in plasma membrane	ISO Inferred from Sequence Orthology more info
located_in plasma membrane raft	IDA Inferred from Direct Assay more info	PubMed
located_in postsynaptic membrane	EXP Inferred from Experiment more info	PubMed
is_active_in postsynaptic membrane	IBA Inferred from Biological aspect of Ancestor more info
is_active_in postsynaptic membrane	IDA Inferred from Direct Assay more info	PubMed
located_in postsynaptic membrane	IDA Inferred from Direct Assay more info	PubMed
located_in postsynaptic membrane	IEA Inferred from Electronic Annotation more info
is_active_in postsynaptic membrane	ISO Inferred from Sequence Orthology more info
located_in postsynaptic membrane	ISO Inferred from Sequence Orthology more info
is_active_in postsynaptic specialization membrane	ISO Inferred from Sequence Orthology more info
part_of potassium channel complex	IDA Inferred from Direct Assay more info	PubMed
located_in sarcolemma	IDA Inferred from Direct Assay more info	PubMed
located_in sarcolemma	IEA Inferred from Electronic Annotation more info
located_in synapse	EXP Inferred from Experiment more info	PubMed
located_in synapse	IEA Inferred from Electronic Annotation more info
located_in synapse	ISO Inferred from Sequence Orthology more info
part_of voltage-gated potassium channel complex	IBA Inferred from Biological aspect of Ancestor more info
part_of voltage-gated potassium channel complex	IDA Inferred from Direct Assay more info	PubMed
part_of voltage-gated potassium channel complex	IEA Inferred from Electronic Annotation more info
part_of voltage-gated potassium channel complex	ISO Inferred from Sequence Orthology more info

General protein information

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Preferred Names: A-type voltage-gated potassium channel KCND2

Names: potassium voltage-gated channel subfamily D member 2; potassium channel, voltage-gated Shal-related subfamily D, member 2; potassium voltage gated channel, Shal-related family, member 2; potassium voltage-gated channel, Shal-related subfamily, member 2; voltage-gated potassium channel subunit Kv4.2

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

NM_031730.2 → NP_113918.2 A-type voltage-gated potassium channel KCND2

See identical proteins and their annotated locations for NP_113918.2

Status: VALIDATED

Source sequence(s)

CB790894, CO393575, JAXUCZ010000004, M59980

UniProtKB/Swiss-Prot

Q00090, Q63881, Q99249

UniProtKB/TrEMBL

A0A8I6GL23

Related

ENSRNOP00000095226.1, ENSRNOT00000112178.2

Conserved Domains (3) summary

cl38908
Location:6 → 144

BTB_POZ; BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain superfamily

pfam00520
Location:184 → 415

Ion_trans; Ion transport protein

pfam11879
Location:445 → 546

DUF3399; Domain of unknown function (DUF3399)

RefSeqs of Annotated Genomes: GCF_036323735.1-RS_2024_02

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCr8

Genomic

NC_086022.1 Reference GRCr8

Range

50741595..51243540

Download

GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

XM_039108326.1 → XP_038964254.1 potassium voltage-gated channel subfamily D member 2 isoform X1

Conserved Domains (2) summary

cl38908
Location:6 → 144

BTB_POZ; BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain superfamily

pfam00520
Location:184 → 375

Ion_trans; Ion transport protein