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- Table of Contents
Facts about Gamma-aminobutyric acid type B receptor subunit 2.
Part of a heterodimeric G-protein coupled receptor for GABA, formed by GABBR1 and GABBR2 (PubMed:9872316, PubMed:9872744, PubMed:15617512, PubMed:18165688, PubMed:22660477, PubMed:24305054).
Within the heterodimeric GABA receptor, only GABBR1 seems to bind agonists, while GABBR2 mediates coupling to G proteins (PubMed:18165688).Ligand binding causes a conformation change that activates signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase (PubMed:10075644, PubMed:10773016, PubMed:24305054). Plays a critical role in the fine-tuning of inhibitory synaptic transmission (PubMed:9872744, PubMed:22660477).
Human | |
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Gene Name: | GABBR2 |
Uniprot: | O75899 |
Entrez: | 9568 |
Belongs to: |
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G-protein coupled receptor 3 family |
GABA B Receptor Compounds
Mass (kDA):
105.821 kDA
Human | |
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Location: | 9q22.33 |
Sequence: | 9; NC_000009.12 (98288104..98708935, complement) |
Highly expressed in brain, especially in cerebral cortex, thalamus, hippocampus, frontal, occipital and temporal lobe, occipital pole and cerebellum, followed by corpus callosum, caudate nucleus, spinal cord, amygdala and medulla (PubMed:10087195, PubMed:10328880, PubMed:10727622, PubMed:9872744). Weakly expressed in heart, testis and skeletal muscle (PubMed:10087195, PubMed:10727622).
Cell membrane; Multi-pass membrane protein. Cell junction, synapse, postsynaptic cell membrane; Multi-pass membrane protein. Coexpression of GABBR1 and GABBR2 is required for GABBR1 maturation and transport to the plasma membrane. In contrast, GABBR2 does not depend on GABBR1 for transport to the cell membrane.
PMID: 9872316 by White J.H., et al. Heterodimerization is required for the formation of a functional GABA(B) receptor.
PMID: 10087195 by Ng G.Y.K., et al. Cloning of a novel G-protein-coupled receptor GPR 51 resembling GABAB receptors expressed predominantly in nervous tissues and mapped proximal to the hereditary sensory neuropathy type 1 locus on chromosome 9.