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KCNJ4

From Wikipedia, the free encyclopedia
Protein-coding gene in the species Homo sapiens
KCNJ4
Available structures
PDB Ortholog search: PDBe RCSB
List of PDB id codes

3GJ9

Identifiers
Aliases KCNJ4 , HIR, HIRK2, HRK1, IRK-3, IRK3, Kir2.3, potassium voltage-gated channel subfamily J member 4, potassium inwardly rectifying channel subfamily J member 4
External IDsOMIM: 600504; MGI: 104743; HomoloGene: 3653; GeneCards: KCNJ4; OMA:KCNJ4 - orthologs
Gene location (Human)
Chromosome 22 (human)
Chr. Chromosome 22 (human) [1]
Band 22q13.1Start38,426,327 bp [1]
End38,455,199 bp [1]
Gene location (Mouse)
Chromosome 15 (mouse)
Chr. Chromosome 15 (mouse)[2]
Band 15 E1|15 37.74 cMStart79,367,915 bp [2]
End79,389,442 bp [2]
RNA expression pattern
Bgee
Human Mouse (ortholog)
  • endothelial cell

  • middle temporal gyrus

  • Brodmann area 10

  • Brodmann area 23

  • frontal pole

  • superior frontal gyrus

  • postcentral gyrus

  • Brodmann area 46

  • Region I of hippocampus proper

  • entorhinal cortex
  • superior frontal gyrus

  • primary visual cortex

  • perirhinal cortex

  • dentate gyrus of hippocampal formation granule cell

  • entorhinal cortex

  • prefrontal cortex

  • hippocampus proper

  • nucleus accumbens

  • CA3 field

  • primary motor cortex
More reference expression data
BioGPS


Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Orthologs
SpeciesHumanMouse
Entrez

3761

16520

Ensembl

ENSG00000168135

ENSMUSG00000044216

UniProt

P48050

P52189

RefSeq (mRNA)

NM_152868
NM_004981

NM_008427

RefSeq (protein)

NP_004972
NP_690607

n/a

Location (UCSC)Chr 22: 38.43 – 38.46 Mb Chr 15: 79.37 – 79.39 Mb
PubMed search[3] [4]
Wikidata

Potassium inwardly-rectifying channel, subfamily J, member 4, also known as KCNJ4 or Kir2.3, is a human gene.[5]

Function

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Several different potassium channels are known to be involved with electrical signaling in the nervous system. One class is activated by depolarization whereas a second class is not. The latter are referred to as inwardly rectifying K+ channels, and they have a greater tendency to allow potassium to flow into the cell rather than out of it. This asymmetry in potassium ion conductance plays a key role in the excitability of muscle cells and neurons. The protein encoded by this gene is an integral membrane protein and member of the inward rectifier potassium channel family. The encoded protein has a small unitary conductance compared to other members of this protein family. Two transcript variants encoding the same protein have been found for this gene.[5]

Interactions

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KCNJ4 has been shown to interact with:

See also

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References

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  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000168135Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000044216Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ a b "Entrez Gene: KCNJ4 potassium inwardly-rectifying channel, subfamily J, member 4".
  6. ^ a b c Leonoudakis D, Conti LR, Anderson S, Radeke CM, McGuire LM, Adams ME, Froehner SC, Yates JR, Vandenberg CA (May 2004). "Protein trafficking and anchoring complexes revealed by proteomic analysis of inward rectifier potassium channel (Kir2.x)-associated proteins". J. Biol. Chem. 279 (21): 22331–46. doi:10.1074/jbc.M400285200 . PMID 15024025.
  7. ^ a b c d Leonoudakis D, Conti LR, Radeke CM, McGuire LM, Vandenberg CA (April 2004). "A multiprotein trafficking complex composed of SAP97, CASK, Veli, and Mint1 is associated with inward rectifier Kir2 potassium channels". J. Biol. Chem. 279 (18): 19051–63. doi:10.1074/jbc.M400284200 . PMID 14960569.
  8. ^ Leonoudakis D, Mailliard W, Wingerd K, Clegg D, Vandenberg C (March 2001). "Inward rectifier potassium channel Kir2.2 is associated with synapse-associated protein SAP97". J. Cell Sci. 114 (Pt 5): 987–98. doi:10.1242/jcs.114.5.987 . PMID 11181181.
  9. ^ Nehring RB, Wischmeyer E, Döring F, Veh RW, Sheng M, Karschin A (January 2000). "Neuronal inwardly rectifying K(+) channels differentially couple to PDZ proteins of the PSD-95/SAP90 family". J. Neurosci. 20 (1): 156–62. doi:10.1523/JNEUROSCI.20-01-00156.2000 . PMC 6774109 . PMID 10627592.
  10. ^ Inanobe A, Fujita A, Ito M, Tomoike H, Inageda K, Kurachi Y (June 2002). "Inward rectifier K+ channel Kir2.3 is localized at the postsynaptic membrane of excitatory synapses". Am. J. Physiol., Cell Physiol. 282 (6): C1396–403. doi:10.1152/ajpcell.00615.2001. PMID 11997254.
  11. ^ Olsen O, Liu H, Wade JB, Merot J, Welling PA (January 2002). "Basolateral membrane expression of the Kir 2.3 channel is coordinated by PDZ interaction with Lin-7/CASK complex". Am. J. Physiol., Cell Physiol. 282 (1): C183–95. doi:10.1152/ajpcell.00249.2001. PMID 11742811.

Further reading

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This article incorporates text from the United States National Library of Medicine, which is in the public domain.

Ligand-gated
Voltage-gated
Constitutively active
Proton-gated
Voltage-gated
Calcium-activated
Inward-rectifier
Tandem pore domain
Voltage-gated
Miscellaneous
Cl: Chloride channel
H+: Proton channel
M+: CNG cation channel
M+: TRP cation channel
H2O (+ solutes): Porin
Cytoplasm: Gap junction
By gating mechanism
Ion channel class
see also disorders

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