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0GBRG3_HUMAN*   SwissProt (?) | Description Local Annotation Link Reference
General Information
NameGABRG3
DescriptionGamma-aminobutyric-acid receptor gamma-3 subunit precursor (gaba(a) receptor).
SpeciesHomo sapiens (NCBI taxonomy ID: 9606)
GO0016021 integral to membrane (NAS)
0005230 extracellular ligand-gated ion channel acti... (NAS)
0007268 synaptic transmission (NAS)

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schematic display of those terms with internal associations, click the node and browse the corresponding GO term
Domain Architecture (Details)
InterPro domains assigned to SynO:
Neurotransmitter ligand-gated ion channels are transmembrane receptor-ion channel complexes that open transiently upon binding of specific ligands.llowing rapid transmission of signals at chemical synapses .Of the five families known.our have been shown to form a sequence-related superfamily. These are the gamma-aminobutyric acid type A (GABA-A).icotinic acetylcholine.lycine and the serotonin 5HT3 receptors. The ionotropic glutamate receptors () have a distinct primary structure.However.ll these receptors possess a pentameric structure (made up of varying subunits).urrounding a central pore. Each of these subunits contains a large extracellular N-terminal ligand-binding region; 3 hydrophobic transmembrane domains; a large intracellular region; and a fourth hydrophobic domain .This domain represents four transmembrane helices of a variety of neurotransmitter-gated ion-channels.
  IPR006029:Neurotransmitter-gated ion-channel transmembrane region
Neurotransmitter ligand-gated ion channels are transmembrane receptor-ion channel complexes that open transiently upon binding of specific ligands.llowing rapid transmission of signals at chemical synapses .Of the five families known.our have been shown to form a sequence-related superfamily. These are the gamma-aminobutyric acid type A (GABA-A).icotinic acetylcholine.lycine and the serotonin 5HT3 receptors. The ionotropic glutamate receptors () have a distinct primary structure.However.ll these receptors possess a pentameric structure (made up of varying subunits).urrounding a central pore. Each of these subunits contains a large extracellular N-terminal ligand-binding region; 3 hydrophobic transmembrane domains; a large intracellular region; and a fourth hydrophobic domain .This InterPro entry represents the GABA-A.icotinic.lycine.nd 5HT3 receptors.
  IPR006201:Neurotransmitter-gated ion-channel
InterPro domains unassigned to SynO:
Neurotransmitter ligand-gated ion channels are transmembrane receptor-ion channel complexes that open transiently upon binding of specific ligands.llowing rapid transmission of signals at chemical synapses .Of the five families known.our have been shown to form a sequence-related superfamily. These are the gamma-aminobutyric acid type A (GABA-A).icotinic acetylcholine.lycine and the serotonin 5HT3 receptors. The ionotropic glutamate receptors () have a distinct primary structure.However.ll these receptors possess a pentameric structure (made up of varying subunits).urrounding a central pore. Each of these subunits contains a large extracellular N-terminal ligand-binding region; 3 hydrophobic transmembrane domains; a large intracellular region; and a fourth hydrophobic domain . Gamma-aminobutyric acid type A (GABAA) receptors are members of the neurotransmitter ligand-gated ion channels: they mediate neuronal inhibition on binding GABA. The effects of GABA on GABAA receptors are modulated by a range of therapeutically important drugs.ncluding barbiturates.naesthetics and benzodiazepines (BZs) . The BZs are a diverse range of compounds.ncluding widely prescribed drugs.uch as librium and valium.nd their interaction with GABAA receptors provides the most potent pharmacological means of distinguishing different GABAA receptor subtypes. GABAA receptors are pentameric membrane proteins that operate GABA-gated chloride channels . Eight types of receptor subunit have been cloned.ith multiple subtypes within some classes: alpha 1-6.eta 1-4.amma 1-4.elta.psilon.i.ho 1-3 and theta . Subunits are typically 50-60kDa in size and comprise a long N-terminal extracellular domain.ontaining a putative signal peptide and a disulphide-bonded beta structural loop; 4 putative transmembrane (TM) domains; and a large cytoplasmic loop connecting the third and fourth TM domains. Amongst family members.he large cytoplasmic loop displays the most divergence in terms of primary structure.he TM domains showing the highest level of sequence conservation .
  IPR005437:Gamma-aminobutyric-acid A receptor, gamma subunit
Gamma-aminobutyric acid type A (GABAA) receptors are members of the neurotransmitter ligand-gated ion channels: they mediate neuronal inhibition on binding GABA. The effects of GABA on GABAA receptors are modulated by a range of therapeutically important drugs.ncluding barbiturates.naesthetics and benzodiazepines (BZs) . The BZs are a diverse range of compounds.ncluding widely prescribed drugs.uch as librium and valium.nd their interaction with GABAA receptors provides the most potent pharmacological means of distinguishing different GABAA receptor subtypes. GABAA receptors are pentameric membrane proteins that operate GABA-gated chloride channels . Eight types of receptor subunit have been cloned.ith multiple subtypes within some classes: alpha 1-6.eta 1-4.amma 1-4.elta.psilon.i.ho 1-3 and theta . Subunits are typically 50-60kDa in size and comprise a long N-terminal extracellular domain.ontaining a putative signal peptide and a disulphide-bonded beta structural loop; 4 putative transmembrane (TM) domains; and a large cytoplasmic loop connecting the third and fourth TM domains. Amongst family members.he large cytoplasmic loop displays the most divergence in terms of primary structure.he TM domains showing the highest level of sequence conservation . Most GABAA receptors contain one type of alpha and beta subunit.nd a single gamma polypeptide in a ratio of 2:2:1. Whilst the critical residue involved in benzodiazepine (BZ) binding is believed to be located within the alpha subunit .he BZ binding site is considered to be located at the interface between adjacent alpha and gamma subunits: replacement of gamma subunits with delta and epsilon renders the receptor insensitive to BZs due to disruption of the binding site . Three mammalian gamma subunits have been identified (gamma 1 to 3).ach encoded by a separate gene.lus an avian gamma 4 subunit. The presence of a gamma 2 subunit.ogether with alpha 1.onfers classical BZ-binding activity to GABAA receptors; substitution for gamma 1 or 3 leads to an altered binding profile for BZs . The gamma 3 subunit confers a slightly reduced binding affinity for BZs when compared to gamma 2-containing receptors .lthough the difference is not as great as that observed for gamma 1-containing receptor subtypes.
  IPR005440:Gamma-aminobutyric-acid A receptor, gamma 3 subunit
Neurotransmitter ligand-gated ion channels are transmembrane receptor-ion channel complexes that open transiently upon binding of specific ligands.llowing rapid transmission of signals at chemical synapses .Of the five families known.our have been shown to form a sequence-related superfamily. These are the gamma-aminobutyric acid type A (GABA-A).icotinic acetylcholine.lycine and the serotonin 5HT3 receptors. The ionotropic glutamate receptors () have a distinct primary structure.However.ll these receptors possess a pentameric structure (made up of varying subunits).urrounding a central pore. Each of these subunits contains a large extracellular N-terminal ligand-binding region; 3 hydrophobic transmembrane domains; a large intracellular region; and a fourth hydrophobic domain . Gamma-aminobutyric acid type A (GABAA) receptors are members of the neurotransmitter ligand-gated ion channels: they mediate neuronal inhibition on binding GABA. The effects of GABA on GABAA receptors are modulated by a range of therapeutically important drugs.ncluding barbiturates.naesthetics and benzodiazepines (BZs) . The BZs are a diverse range of compounds.ncluding widely prescribed drugs.uch as librium and valium.nd their interaction with GABAA receptors provides the most potent pharmacological means of distinguishing different GABAA receptor subtypes. GABAA receptors are pentameric membrane proteins that operate GABA-gated chloride channels . Eight types of receptor subunit have been cloned.ith multiple subtypes within some classes: alpha 1-6.eta 1-4.amma 1-4.elta.psilon.i.ho 1-3 and theta . Subunits are typically 50-60kDa in size and comprise a long N-terminal extracellular domain.ontaining a putative signal peptide and a disulphide-bonded beta structural loop; 4 putative transmembrane (TM) domains; and a large cytoplasmic loop connecting the third and fourth TM domains. Amongst family members.he large cytoplasmic loop displays the most divergence in terms of primary structure.he TM domains showing the highest level of sequence conservation .
  IPR006028:Gamma-aminobutyric acid A receptor
Neurotransmitter ligand-gated ion channels are transmembrane receptor-ion channel complexes that open transiently upon binding of specific ligands.llowing rapid transmission of signals at chemical synapses .Of the five families known.our have been shown to form a sequence-related superfamily. These are the gamma-aminobutyric acid type A (GABA-A).icotinic acetylcholine.lycine and the serotonin 5HT3 receptors. The ionotropic glutamate receptors () have a distinct primary structure.However.ll these receptors possess a pentameric structure (made up of varying subunits).urrounding a central pore. Each of these subunits contains a large extracellular N-terminal ligand-binding region; 3 hydrophobic transmembrane domains; a large intracellular region; and a fourth hydrophobic domain .This entry presents the extracellular ligand binding domain of these ion channels. This domain forms a pentameric arrangement in the known structure.
  IPR006202:Neurotransmitter-gated ion-channel ligand-binding
IPR006202:Neur_chan_LBD 
Evalue:-74.8860549926758 
Location:47-253IPR006029:Neur_chan_memb 
Evalue:-70.0861892700195 
Location:260-461IPR005440:GABAARGAMMA3 
Evalue:0 
Location:1-23
SequencesProtein: GBRG3_HUMAN (467 aa)
mRNA: NM_033223
Local Annotation
Synapse Ontology
Postsynaptic compartment is represented by a patch of plasma membrane containing a packed array of neurotransmitter receptors and by an underlying dense matrix, the postsynaptic density (PSD).
sdb:0005 Postsynaptic compartment  (Evidence:keywords,domains)
this kind of receptor usually locates at the postsynaptic plasma membranous region.
sdb:0109 ionotropic receptor  (Evidence:keywords,domains)
priming for exocytosis prepares the calcium-dependent release and may involve partial fusion process. The vesicles are primed and become responsive to calcium.
sdb:0120 priming  (Evidence:keywords,domains)
?
sdb:0305 binding to postsynaptic receptor and internization  (Evidence:keywords,domains)
?
sdb:0328 transmitters release and endocytosis  (Evidence:keywords,domains)
?
sdb:0334 inhibitory postsynapstic component  (Evidence:keywords,domains)
KO assignmentK05188
  Level 3 annotation:
    gamma-aminobutyric acid (GABA) A receptor, gamma 3
  Level 2 annotation:
    Neuroactive ligand-receptor interaction
    Ion channels
Loci Structure (Details)Loci index, Chromosomal location, Length, Possible relational loci clusterExon1: 24 residues, 24799412-24799481Exon2: 51 residues, 24804894-24805043Exon3: 24 residues, 24854646-24854714Exon4: 75 residues, 25154701-25154922Exon5: 29 residues, 25156698-25156781Exon6: 48 residues, 25399390-25399528Exon7: 53 residues, 25438712-25438865Exon8: 67 residues, 25446173-25446370Exon9: 22 residues, 25446673-25446733Exon10: 129 residues, 25451340-25451722Exon11: 2 residues, -Jump to GBRG3_HUMAN