Kcnj2 potassium inwardly-rectifying channel, subfamily J, member 2 [Mus musculus (house mouse)] - Gene

Summary

Official Symbol: Kcnj2provided by MGI
Official Full Name: potassium inwardly-rectifying channel, subfamily J, member 2provided by MGI
Primary source: MGI:MGI:104744
See related: Ensembl:ENSMUSG00000041695 AllianceGenome:MGI:104744
Gene type: protein coding
RefSeq status: VALIDATED
Organism: Mus musculus
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Glires; Rodentia; Myomorpha; Muroidea; Muridae; Murinae; Mus; Mus
Also known as: IRK1; Kcnf1; Kir2.1
Summary: Enables identical protein binding activity. Acts upstream of or within cardiac muscle cell action potential and magnesium ion transport. Predicted to be located in several cellular components, including T-tubule; dendritic spine; and intercalated disc. Predicted to be part of voltage-gated potassium channel complex. Predicted to be active in glutamatergic synapse and postsynaptic membrane. Is expressed in several structures, including alimentary system; brain; genitourinary system; heart; and sensory organ. Human ortholog(s) of this gene implicated in Andersen-Tawil syndrome; familial atrial fibrillation; familial periodic paralysis; and short QT syndrome. Orthologous to human KCNJ2 (potassium inwardly rectifying channel subfamily J member 2). [provided by Alliance of Genome Resources, Dec 2024]
Expression: Broad expression in heart adult (RPKM 5.9), cortex adult (RPKM 2.9) and 18 other tissues See more
Orthologs: human all
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Genomic context

Location:: 11 E2; 11 75.23 cM

Exon count:: 2

Annotation release	Status	Assembly	Chr	Location
RS_2024_02	current	GRCm39 (GCF_000001635.27)	11	NC_000077.7 (110956990..110967651)
108.20200622	previous assembly	GRCm38.p6 (GCF_000001635.26)	11	NC_000077.6 (111066164..111076825)

Chromosome 11 - NC_000077.7 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Genomic Sequence:

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Expression

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See details

Project title: Mouse ENCODE transcriptome data
Description: RNA profiling data sets generated by the Mouse ENCODE project.
BioProject: PRJNA66167
Publication: PMID 25409824
Analysis date: n/a

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Visceral adipose of obese mice inhibits endothelial inwardly rectifying K[+] channels in a CD36-dependent fashion.
Title: Visceral adipose of obese mice inhibits endothelial inwardly rectifying K(+) channels in a CD36-dependent fashion.
The Kir2.1E299V mutation increases atrial fibrillation vulnerability while protecting the ventricles against arrhythmias in a mouse model of short QT syndrome type 3.
Title: The Kir2.1E299V mutation increases atrial fibrillation vulnerability while protecting the ventricles against arrhythmias in a mouse model of short QT syndrome type 3.
Hypothalamic POMC neuron-specific knockout of MC4R affects insulin sensitivity by regulating Kir2.1.
Title: Hypothalamic POMC neuron-specific knockout of MC4R affects insulin sensitivity by regulating Kir2.1.
Kir2.1 channel regulates macrophage polarization via the Ca2+/CaMK II/ERK/NF-kappaB signaling pathway.
Title: Kir2.1 channel regulates macrophage polarization via the Ca2+/CaMK II/ERK/NF-κB signaling pathway.
Alzheimer's disease and cerebrovascular pathology alter inward rectifier potassium (KIR 2.1) channels in endothelium of mouse cerebral arteries.
Title: Alzheimer's disease and cerebrovascular pathology alter inward rectifier potassium (K(IR) 2.1) channels in endothelium of mouse cerebral arteries.
Impaired cytoplasmic domain interactions cause co-assembly defect and loss of function in the p.Glu293Lys KNCJ2 variant isolated from an Andersen-Tawil syndrome patient.
Title: Impaired cytoplasmic domain interactions cause co-assembly defect and loss of function in the p.Glu293Lys KNCJ2 variant isolated from an Andersen-Tawil syndrome patient.
Cholesterol-Induced Suppression of Endothelial Kir Channels Is a Driver of Impairment of Arteriolar Flow-Induced Vasodilation in Humans.
Title: Cholesterol-Induced Suppression of Endothelial Kir Channels Is a Driver of Impairment of Arteriolar Flow-Induced Vasodilation in Humans.
PIP2 corrects cerebral blood flow deficits in small vessel disease by rescuing capillary Kir2.1 activity.
Title: PIP(2) corrects cerebral blood flow deficits in small vessel disease by rescuing capillary Kir2.1 activity.
The inhibition of Kir2.1 potassium channels depolarizes spinal microglial cells, reduces their proliferation, and attenuates neuropathic pain.
Title: The inhibition of Kir2.1 potassium channels depolarizes spinal microglial cells, reduces their proliferation, and attenuates neuropathic pain.
Potassium Channels Kv1.3 and Kir2.1 But Not Kv1.5 Contribute to BV2 Cell Line and Primary Microglial Migration.
Title: Potassium Channels Kv1.3 and Kir2.1 But Not Kv1.5 Contribute to BV2 Cell Line and Primary Microglial Migration.

Submit: New GeneRIF Correction See all GeneRIFs (63)

Variation

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Alleles

Alleles of this type are documented at Mouse Genome Informatics (MGI)

Endonuclease-mediated (3)
Targeted (3) 1 citation

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

Kcnj2 (e-PCR), detects polymorphism
- UniSTS:143659

Gene Ontology Provided by MGI

Function	Evidence Code	Pubs
enables identical protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables identical protein binding	ISO Inferred from Sequence Orthology more info
enables inward rectifier potassium channel activity	IBA Inferred from Biological aspect of Ancestor more info
enables inward rectifier potassium channel activity	IDA Inferred from Direct Assay more info	PubMed
enables inward rectifier potassium channel activity	ISO Inferred from Sequence Orthology more info
enables inward rectifier potassium channel activity	ISS Inferred from Sequence or Structural Similarity more info
enables inward rectifier potassium channel activity	TAS Traceable Author Statement more info
enables phosphatidylinositol-4,5-bisphosphate binding	ISO Inferred from Sequence Orthology more info
enables phosphatidylinositol-4,5-bisphosphate binding	ISS Inferred from Sequence or Structural Similarity more info
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables voltage-gated potassium channel activity involved in cardiac muscle cell action potential repolarization	IEA Inferred from Electronic Annotation more info
enables voltage-gated potassium channel activity involved in cardiac muscle cell action potential repolarization	ISO Inferred from Sequence Orthology more info

Process	Evidence Code	Pubs
acts_upstream_of_or_within cardiac muscle cell action potential	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in cardiac muscle cell action potential involved in contraction	IEA Inferred from Electronic Annotation more info
involved_in cardiac muscle cell action potential involved in contraction	ISO Inferred from Sequence Orthology more info
involved_in cellular response to mechanical stimulus	IEA Inferred from Electronic Annotation more info
acts_upstream_of_or_within magnesium ion transport	IDA Inferred from Direct Assay more info	PubMed
involved_in membrane repolarization during action potential	ISO Inferred from Sequence Orthology more info
involved_in membrane repolarization during cardiac muscle cell action potential	IEA Inferred from Electronic Annotation more info
involved_in membrane repolarization during cardiac muscle cell action potential	ISO Inferred from Sequence Orthology more info
involved_in positive regulation of potassium ion transmembrane transport	IEA Inferred from Electronic Annotation more info
involved_in positive regulation of potassium ion transmembrane transport	ISO Inferred from Sequence Orthology more info
involved_in potassium ion import across plasma membrane	IBA Inferred from Biological aspect of Ancestor more info
involved_in potassium ion import across plasma membrane	IEA Inferred from Electronic Annotation more info
involved_in potassium ion import across plasma membrane	ISO Inferred from Sequence Orthology more info
involved_in potassium ion transmembrane transport	ISO Inferred from Sequence Orthology more info
involved_in potassium ion transport	ISO Inferred from Sequence Orthology more info
involved_in potassium ion transport	ISS Inferred from Sequence or Structural Similarity more info
involved_in protein homotetramerization	ISO Inferred from Sequence Orthology more info
involved_in protein homotetramerization	ISS Inferred from Sequence or Structural Similarity more info
involved_in regulation of cardiac muscle cell contraction	IEA Inferred from Electronic Annotation more info
involved_in regulation of cardiac muscle cell contraction	ISO Inferred from Sequence Orthology more info
involved_in regulation of heart rate by cardiac conduction	IEA Inferred from Electronic Annotation more info
involved_in regulation of heart rate by cardiac conduction	ISO Inferred from Sequence Orthology more info
involved_in regulation of membrane repolarization	IEA Inferred from Electronic Annotation more info
involved_in regulation of membrane repolarization	ISO Inferred from Sequence Orthology more info
involved_in regulation of monoatomic ion transmembrane transport	IBA Inferred from Biological aspect of Ancestor more info
involved_in regulation of skeletal muscle contraction via regulation of action potential	IEA Inferred from Electronic Annotation more info
involved_in regulation of skeletal muscle contraction via regulation of action potential	ISO Inferred from Sequence Orthology more info
involved_in relaxation of cardiac muscle	IEA Inferred from Electronic Annotation more info
involved_in relaxation of cardiac muscle	ISO Inferred from Sequence Orthology more info
involved_in relaxation of skeletal muscle	IEA Inferred from Electronic Annotation more info
involved_in relaxation of skeletal muscle	ISO Inferred from Sequence Orthology more info

Component	Evidence Code	Pubs
located_in T-tubule	ISO Inferred from Sequence Orthology more info
located_in T-tubule	ISS Inferred from Sequence or Structural Similarity more info
located_in dendrite	ISO Inferred from Sequence Orthology more info
located_in dendritic spine	IEA Inferred from Electronic Annotation more info
located_in dendritic spine	ISO Inferred from Sequence Orthology more info
located_in glutamatergic synapse	IEA Inferred from Electronic Annotation more info
is_active_in glutamatergic synapse	ISO Inferred from Sequence Orthology more info
located_in intercalated disc	IEA Inferred from Electronic Annotation more info
located_in intercalated disc	ISO Inferred from Sequence Orthology more info
located_in membrane	ISO Inferred from Sequence Orthology more info
located_in membrane	ISS Inferred from Sequence or Structural Similarity more info
located_in neuronal cell body	IEA Inferred from Electronic Annotation more info
located_in neuronal cell body	ISO Inferred from Sequence Orthology more info
is_active_in plasma membrane	IBA Inferred from Biological aspect of Ancestor more info
located_in plasma membrane	TAS Traceable Author Statement more info
located_in postsynaptic membrane	IEA Inferred from Electronic Annotation more info
is_active_in postsynaptic membrane	ISO Inferred from Sequence Orthology more info
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: inward rectifier potassium channel 2

Names: IRK-1; inward rectifier K(+) channel Kir2.1; potassium channel, inwardly rectifying subfamily J member 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.