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ASIC4

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ASIC4
Identifiers
AliasesASIC4, ACCN4, BNAC4, acid sensing ion channel subunit family member 4
External IDsOMIM: 606715; MGI: 2652846; HomoloGene: 11166; GeneCards: ASIC4; OMA:ASIC4 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_018674
NM_182847

NM_183022

RefSeq (protein)

NP_061144
NP_878267

NP_898843

Location (UCSC)Chr 2: 219.51 – 219.54 MbChr 1: 75.43 – 75.45 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Acid-sensing ion channel 4 (ASIC4) also known as amiloride-sensitive cation channel 4 (ACCN4) is a protein that in humans is encoded by the ASIC4 gene. The ASIC4 gene is one of the five paralogous genes that encode proteins that form trimeric acid-sensing ion channels (ASICs) in mammals.[5] The cDNA of this gene was first cloned in 2000.[6][7] The ASIC genes have splicing variants that encode different proteins that are called isoforms.

These genes are mainly expressed in the central and peripheral nervous system.

ASICs can form both homotrimeric (meaning composed of three identical subunits) and heterotrimeric channels.[8]

Structure and function

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This gene encodes a member of the ASIC/ENaC superfamily of proteins.[9] The members of this family are amiloride-sensitive sodium channels that contain intracellular N and C termini, 2 hydrophobic transmembrane (TM) regions, and a large extracellular loop, which has many cysteine residues with conserved spacing. The TM regions are generally symbolized as TM1 (clone to N-terminus) and TM2 (close to C-terminus).

The pore of the channel through which ions selectively flow from the extracellular side into the cytoplasm is formed by the three TM2 regions of the trimer. [5]

References

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  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000072182Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000033007Ensembl, 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 Hanukoglu I (2017). "ASIC and ENaC type sodium channels: Conformational states and the structures of the ion selectivity filters". FEBS Journal. 284 (4): 525–545. doi:10.1111/febs.13840. PMID 27580245. S2CID 24402104.
  6. ^ Gründer S, Geissler HS, Bässler EL, Ruppersberg JP (2000). "A new member of acid-sensing ion channels from pituitary gland". NeuroReport. 11 (8): 1607–11. doi:10.1097/00001756-200006050-00003. PMID 10852210. S2CID 46420660.
  7. ^ Gründer S, Geisler HS, Rainier S, Fink JK (2001). "Acid-sensing ion channel (ASIC) 4 gene: physical mapping, genomic organisation, and evaluation as a candidate for paroxysmal dystonia". Eur. J. Hum. Genet. 9 (9): 672–6. doi:10.1038/sj.ejhg.5200699. PMID 11571555.
  8. ^ Babinski K, Catarsi S, Biagini G, Séguéla P (Sep 2000). "Mammalian ASIC2a and ASIC3 subunits co-assemble into heteromeric proton-gated channels sensitive to Gd3+". The Journal of Biological Chemistry. 275 (37): 28519–25. doi:10.1074/jbc.M004114200. hdl:11380/304669. PMID 10842183.
  9. ^ Hanukoglu I, Hanukoglu A (Jan 2016). "Epithelial sodium channel (ENaC) family: Phylogeny, structure-function, tissue distribution, and associated inherited diseases". Gene. 579 (2): 95–132. doi:10.1016/j.gene.2015.12.061. PMC 4756657. PMID 26772908.

Further reading

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