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GABRA2 gamma-aminobutyric acid type A receptor subunit alpha2 [ Homo sapiens (human) ]

Gene ID: 2555, updated on 27-Nov-2019

Summary

Official Symbol
GABRA2provided by HGNC
Official Full Name
gamma-aminobutyric acid type A receptor subunit alpha2provided by HGNC
Primary source
HGNC:HGNC:4076
See related
Ensembl:ENSG00000151834 MIM:137140
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
EIEE78
Summary
GABA is the major inhibitory neurotransmitter in the mammalian brain where it acts at GABA-A receptors, which are ligand-gated chloride channels. Chloride conductance of these channels can be modulated by agents such as benzodiazepines that bind to the GABA-A receptor. At least 16 distinct subunits of GABA-A receptors have been identified. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2013]
Expression
Biased expression in brain (RPKM 13.5), kidney (RPKM 1.1) and 1 other tissue See more
Orthologs

Genomic context

See GABRA2 in Genome Data Viewer
Location:
4p12
Exon count:
14
Annotation release Status Assembly Chr Location
109.20190905 current GRCh38.p13 (GCF_000001405.39) 4 NC_000004.12 (46243548..46390349, complement)
105 previous assembly GRCh37.p13 (GCF_000001405.25) 4 NC_000004.11 (46246470..46392056, complement)

Chromosome 4 - NC_000004.12Genomic Context describing neighboring genes Neighboring gene RN7SK pseudogene 199 Neighboring gene gamma-aminobutyric acid type A receptor subunit gamma1 Neighboring gene Sharpr-MPRA regulatory region 442 Neighboring gene RNA, U6 small nuclear 412, pseudogene

Genomic regions, transcripts, and products

Expression

  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Phenotypes

Associated conditions

Description Tests
Alcohol dependence
MedGen: C0001973 OMIM: 103780 GeneReviews: Not available
Compare labs
EPILEPTIC ENCEPHALOPATHY, EARLY INFANTILE, 78
MedGen: CN262228 OMIM: 618557 GeneReviews: Not available
not available

NHGRI GWAS Catalog

Description
Genetic determinants of common epilepsies: a meta-analysis of genome-wide association studies.
NHGRI GWA Catalog

HIV-1 interactions

Protein interactions

Protein Gene Interaction Pubs
Envelope surface glycoprotein gp120 env HIV-1 gp120 induces mucus formation through the NACHRA7/GABRA2 pathway in normal human bronchial epithelial cells PubMed
env MUC5AC and GABRA2 are upregulated more strongly by HIV-1 X4- and X4/R5- than R5-tropic gp120 in normal human bronchial epithelial cells PubMed

Go to the HIV-1, Human Interaction Database

Pathways from BioSystems

  • GABA A receptor activation, organism-specific biosystem (from REACTOME)
    GABA A receptor activation, organism-specific biosystemGABA B receptors are G protein coupled receptors that are activated by GABA binding to the B1 subunit and B2 subunit alters the activity of adenylate cyclase by interacting with the G alpha i/alpha 0...
  • GABA receptor activation, organism-specific biosystem (from REACTOME)
    GABA receptor activation, organism-specific biosystemGamma aminobutyric acid (GABA) receptors are the major inhibitory receptors in human synapses. They are of two types. GABA A receptors are fast-acting ligand gated chloride ion channels that mediate ...
  • GABAergic synapse, organism-specific biosystem (from KEGG)
    GABAergic synapse, organism-specific biosystemGamma aminobutyric acid (GABA) is the most abundant inhibitory neurotransmitter in the mammalian central nervous system (CNS). When released in the synaptic cleft, GABA binds to three major classes o...
  • GABAergic synapse, conserved biosystem (from KEGG)
    GABAergic synapse, conserved biosystemGamma aminobutyric acid (GABA) is the most abundant inhibitory neurotransmitter in the mammalian central nervous system (CNS). When released in the synaptic cleft, GABA binds to three major classes o...
  • Ion channel transport, organism-specific biosystem (from REACTOME)
    Ion channel transport, organism-specific biosystemIon channels mediate the flow of ions across the plasma membrane of cells. They are integral membrane proteins, typically a multimer of proteins, which, when arranged in the membrane, create a pore f...
  • Ligand-gated ion channel transport, organism-specific biosystem (from REACTOME)
    Ligand-gated ion channel transport, organism-specific biosystemLigand-gated ion channels (LGICs) are a group of transmembrane ion channels that are opened or closed in response to the binding of a chemical messenger (Purves, 2001).
  • Morphine addiction, organism-specific biosystem (from KEGG)
    Morphine addiction, organism-specific biosystemMorphine is an alkaloid from the plant extracts of opium poppy. Although morphine is highly effective for the treatment of pain, it is also known to be intensely addictive. We now know that the most ...
  • Morphine addiction, conserved biosystem (from KEGG)
    Morphine addiction, conserved biosystemMorphine is an alkaloid from the plant extracts of opium poppy. Although morphine is highly effective for the treatment of pain, it is also known to be intensely addictive. We now know that the most ...
  • Neuroactive ligand-receptor interaction, organism-specific biosystem (from KEGG)
    Neuroactive ligand-receptor interaction, organism-specific biosystem
    Neuroactive ligand-receptor interaction
  • Neuroactive ligand-receptor interaction, conserved biosystem (from KEGG)
    Neuroactive ligand-receptor interaction, conserved biosystem
    Neuroactive ligand-receptor interaction
  • Neuronal System, organism-specific biosystem (from REACTOME)
    Neuronal System, organism-specific biosystemThe human brain contains at least 100 billion neurons, each with the ability to influence many other cells. Clearly, highly sophisticated and efficient mechanisms are needed to enable communication a...
  • Neurotransmitter Receptor Binding And Downstream Transmission In The Postsynaptic Cell, organism-specific biosystem (from REACTOME)
    Neurotransmitter Receptor Binding And Downstream Transmission In The Postsynaptic Cell, organism-specific biosystemThe neurotransmitter in the synaptic cleft released by the pre-synaptic neuron binds specific receptors located on the post-synaptic terminal. These receptors are either ion channels or G protein cou...
  • Nicotine addiction, organism-specific biosystem (from KEGG)
    Nicotine addiction, organism-specific biosystemNicotine is one of the main psychoactive ingredients in tobacco that contributes to the harmful tobacco smoking habit. A common feature of addictive drugs, including nicotine, is that they increase d...
  • Nicotine addiction, conserved biosystem (from KEGG)
    Nicotine addiction, conserved biosystemNicotine is one of the main psychoactive ingredients in tobacco that contributes to the harmful tobacco smoking habit. A common feature of addictive drugs, including nicotine, is that they increase d...
  • Retrograde endocannabinoid signaling, organism-specific biosystem (from KEGG)
    Retrograde endocannabinoid signaling, organism-specific biosystemEndogenous cannabinoids (endocannabinoids) serve as retrograde messengers at synapses in various regions of the brain. The family of endocannabinoids includes at least five derivatives of arachidonic...
  • Retrograde endocannabinoid signaling, conserved biosystem (from KEGG)
    Retrograde endocannabinoid signaling, conserved biosystemEndogenous cannabinoids (endocannabinoids) serve as retrograde messengers at synapses in various regions of the brain. The family of endocannabinoids includes at least five derivatives of arachidonic...
  • Taste transduction, organism-specific biosystem (from KEGG)
    Taste transduction, organism-specific biosystemFive basic tastes are recognized by humans and most other animals - bitter, sweet, sour, salty and umami. In vertebrates, taste stimuli are detected by taste receptor cells (TRCs). At least three dis...
  • Taste transduction, conserved biosystem (from KEGG)
    Taste transduction, conserved biosystemFive basic tastes are recognized by humans and most other animals - bitter, sweet, sour, salty and umami. In vertebrates, taste stimuli are detected by taste receptor cells (TRCs). At least three dis...
  • Transmembrane transport of small molecules, organism-specific biosystem (from REACTOME)
    Transmembrane transport of small molecules, organism-specific biosystem
    Transmembrane transport of small molecules
  • Transmission across Chemical Synapses, organism-specific biosystem (from REACTOME)
    Transmission across Chemical Synapses, organism-specific biosystemChemical synapses are specialized junctions that are used for communication between neurons, neurons and muscle or gland cells. The synapse involves a pre-synaptic neuron and a post-synaptic neuron,...

Interactions

Products Interactant Other Gene Complex Source Pubs Description

General gene information

Markers

Homology

Clone Names

  • FLJ97076

Gene Ontology Provided by GOA

Function Evidence Code Pubs
contributes_to GABA-A receptor activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
GABA-gated chloride ion channel activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
GABA-gated chloride ion channel activity IDA
Inferred from Direct Assay
more info
PubMed 
contributes_to benzodiazepine receptor activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
benzodiazepine receptor activity IMP
Inferred from Mutant Phenotype
more info
PubMed 
chloride channel activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
contributes_to chloride channel activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
contributes_to extracellular ligand-gated ion channel activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
inhibitory extracellular ligand-gated ion channel activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
transmitter-gated ion channel activity involved in regulation of postsynaptic membrane potential IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
Process Evidence Code Pubs
chemical synaptic transmission IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
chloride transmembrane transport IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
chloride transmembrane transport IDA
Inferred from Direct Assay
more info
PubMed 
gamma-aminobutyric acid signaling pathway IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
gamma-aminobutyric acid signaling pathway IMP
Inferred from Mutant Phenotype
more info
PubMed 
inhibitory synapse assembly ISS
Inferred from Sequence or Structural Similarity
more info
 
ion transmembrane transport IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
nervous system process IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
neurotransmitter transport IMP
Inferred from Mutant Phenotype
more info
PubMed 
regulation of membrane potential IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
regulation of neurotransmitter levels IMP
Inferred from Mutant Phenotype
more info
PubMed 
regulation of postsynaptic membrane potential IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
signal transduction IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
synaptic transmission, GABAergic IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
Component Evidence Code Pubs
GABA-A receptor complex IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
GABA-A receptor complex IDA
Inferred from Direct Assay
more info
PubMed 
cell junction IEA
Inferred from Electronic Annotation
more info
 
chloride channel complex IEA
Inferred from Electronic Annotation
more info
 
dendrite membrane IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
integral component of plasma membrane IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
integral component of synaptic vesicle membrane IDA
Inferred from Direct Assay
more info
PubMed 
neuron projection IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
plasma membrane TAS
Traceable Author Statement
more info
 
postsynapse IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
postsynaptic membrane IEA
Inferred from Electronic Annotation
more info
 
synapse IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 

General protein information

Preferred Names
gamma-aminobutyric acid receptor subunit alpha-2
Names
GABA(A) receptor subunit alpha-2
gamma-aminobutyric acid type A receptor alpha2 subunit

NCBI Reference Sequences (RefSeq)

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.

Genomic

  1. NG_012835.2 RefSeqGene

    Range
    4912..151492
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_000807.4NP_000798.2  gamma-aminobutyric acid receptor subunit alpha-2 isoform a precursor

    See identical proteins and their annotated locations for NP_000798.2

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) represents the shortest transcript and encodes the shortest isoform (a). Both variants 1 and 2 encode the same isoform (a).
    Source sequence(s)
    AB209295, AC095060, AC104072, AF086092, BX108394, DA778940, DB478542, DN991770
    Consensus CDS
    CCDS3471.1
    UniProtKB/Swiss-Prot
    P47869
    UniProtKB/TrEMBL
    A0A024R9X6
    Related
    ENSP00000371033.4, ENST00000381620.8
    Conserved Domains (1) summary
    cl27321
    Location:25440
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  2. NM_001114175.2NP_001107647.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform a precursor

    See identical proteins and their annotated locations for NP_001107647.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) differs in the 5' UTR, compared to variant 1. Both variants 1 and 2 encode the same isoform (a).
    Source sequence(s)
    AC104072, AF086092, AK125179, BX108394
    Consensus CDS
    CCDS3471.1
    UniProtKB/Swiss-Prot
    P47869
    UniProtKB/TrEMBL
    A0A024R9X6
    Related
    ENSP00000348897.1, ENST00000356504.5
    Conserved Domains (1) summary
    cl27321
    Location:25440
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  3. NM_001286827.3NP_001273756.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform b

    See identical proteins and their annotated locations for NP_001273756.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (3) lacks an alternate exon in the 5' end and contains an alternate in-frame exon in the 3' end, which leads to the use of a downstream start codon compared to variant 1. The resulting isoform (b) has a shorter and distinct N-terminus and contains an alternate segment compared to isoform a.
    Source sequence(s)
    AC095060, AC104072, AF086092, AK293466, BX108394, DA778940, DB478542, DN991770
    UniProtKB/Swiss-Prot
    P47869
    Conserved Domains (2) summary
    pfam02931
    Location:16195
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
    pfam02932
    Location:202442
    Neur_chan_memb; Neurotransmitter-gated ion-channel transmembrane region
  4. NM_001330690.1NP_001317619.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform c precursor

    Status: REVIEWED

    Description
    Transcript Variant: This variant (4) differs in the 5' UTR and contains an alternate in-frame exon in the 3' coding region. The resulting isoform (c) has the same N- and C-termini, but contains an alternate segment compared to isoform a.
    Source sequence(s)
    AC104072, AF086092, AK293466, AK307128, BX108394, DA343351
    Consensus CDS
    CCDS82921.1
    UniProtKB/Swiss-Prot
    P47869
    UniProtKB/TrEMBL
    E9PBQ7
    Conserved Domains (1) summary
    cl27321
    Location:25500
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain

RefSeqs of Annotated Genomes: Homo sapiens Annotation Release 109.20190905

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

Reference GRCh38.p13 Primary Assembly

Genomic

  1. NC_000004.12 Reference GRCh38.p13 Primary Assembly

    Range
    46243548..46390349 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_024453968.1XP_024309736.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X2

    Conserved Domains (1) summary
    cl27321
    Location:25440
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  2. XM_024453965.1XP_024309733.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X1

    Related
    ENSP00000427603.1, ENST00000507069.5
    Conserved Domains (1) summary
    cl27321
    Location:25500
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  3. XM_024453963.1XP_024309731.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X1

    Related
    ENSP00000444409.2, ENST00000540012.5
    Conserved Domains (1) summary
    cl27321
    Location:25500
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  4. XM_024453967.1XP_024309735.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X1

    Conserved Domains (1) summary
    cl27321
    Location:25500
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  5. XM_024453964.1XP_024309732.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X1

    Conserved Domains (1) summary
    cl27321
    Location:25500
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  6. XM_024453970.1XP_024309738.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X2

    Conserved Domains (1) summary
    cl27321
    Location:25440
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  7. XM_017007983.2XP_016863472.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X2

    UniProtKB/Swiss-Prot
    P47869
    UniProtKB/TrEMBL
    A0A024R9X6
    Related
    ENSP00000421300.1, ENST00000514090.5
    Conserved Domains (1) summary
    cl27321
    Location:25440
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  8. XM_011513675.1XP_011511977.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X1

    See identical proteins and their annotated locations for XP_011511977.1

    UniProtKB/TrEMBL
    E9PBQ7
    Conserved Domains (1) summary
    cl27321
    Location:25500
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  9. XM_024453969.1XP_024309737.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X2

    Conserved Domains (1) summary
    cl27321
    Location:25440
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  10. XM_017007982.2XP_016863471.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X2

    UniProtKB/Swiss-Prot
    P47869
    UniProtKB/TrEMBL
    A0A024R9X6
    Conserved Domains (1) summary
    cl27321
    Location:25440
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  11. XM_024453966.1XP_024309734.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X1

    Conserved Domains (1) summary
    cl27321
    Location:25500
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  12. XM_024453971.1XP_024309739.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X2

    Conserved Domains (1) summary
    cl27321
    Location:25440
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  13. XM_024453974.1XP_024309742.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X3

    Conserved Domains (1) summary
    cl27321
    Location:31385
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  14. XM_024453972.1XP_024309740.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X3

    Conserved Domains (1) summary
    cl27321
    Location:31385
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
  15. XM_024453973.1XP_024309741.1  gamma-aminobutyric acid receptor subunit alpha-2 isoform X3

    Conserved Domains (1) summary
    cl27321
    Location:31385
    Neur_chan_LBD; Neurotransmitter-gated ion-channel ligand binding domain
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