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- Table of Contents
Facts about Gamma-aminobutyric acid type B receptor subunit 1.
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, just GABBR1 seems to bind agonists, while GABBR2 mediates coupling to G proteins (PubMed:18165688).Ligand binding causes a conformation change that triggers signaling through guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase (PubMed:10906333, PubMed:10773016, PubMed:10075644, PubMed:9872744, PubMed:24305054). Signaling inhibits adenylate cyclase, stimulates phospholipase A2, activates potassium channels, inactivates voltage-dependent calcium-channels and modulates inositol phospholipid hydrolysis (PubMed:10075644).
Human | |
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Gene Name: | GABBR1 |
Uniprot: | Q9UBS5 |
Entrez: | 2550 |
Belongs to: |
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G-protein coupled receptor 3 family |
FLJ92613; GABA B R1; GABABR1; GABBR1; GABBR1-3; gamma-aminobutyric acid (GABA) B receptor, 1; gamma-aminobutyric acid type B receptor subunit 1; Gb1; GPRC3A; GPRC3Asubunit 1c; hGB1a; seven transmembrane helix receptor
Mass (kDA):
108.32 kDA
Human | |
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Location: | 6p22.1 |
Sequence: | 6; NC_000006.12 (29602228..29633183, complement) |
Highly expressed in brain (PubMed:9844003, PubMed:9753614, PubMed:9872744). Weakly expressed in heart, small intestine and uterus. Isoform 1A: Mainly expressed in granular cell and molecular layer (PubMed:9844003). Isoform 1B: Mainly expressed in Purkinje cells (PubMed:9844003). Isoform 1E: Predominantly expressed in peripheral tissues as kidney, lung, trachea, colon, small intestine, stomach, bone marrow, thymus and mammary gland (PubMed:10906333).
Cell membrane; Multi-pass membrane protein. Cell junction, synapse, postsynaptic cell membrane; Multi-pass membrane protein. Cell projection, dendrite. Colocalizes with ATF4 in hippocampal neuron dendritic membranes (By similarity). Coexpression of GABBR1 and GABBR2 is required for GABBR1 maturation and transport to the plasma membrane (PubMed:15617512).; [Isoform 1E]: Secreted.
PMID: 9844003 by Kaupmann K., et al. Human gamma-aminobutyric acid type B receptors are differentially expressed and regulate inwardly rectifying K+ channels.
PMID: 9872316 by White J.H., et al. Heterodimerization is required for the formation of a functional GABA(B) receptor.
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