4ms3

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==Crystal structure of the extracellular domain of human GABA(B) receptor bound to the endogenous agonist GABA==
==Crystal structure of the extracellular domain of human GABA(B) receptor bound to the endogenous agonist GABA==
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<StructureSection load='4ms3' size='340' side='right' caption='[[4ms3]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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<StructureSection load='4ms3' size='340' side='right'caption='[[4ms3]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[4ms3]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MS3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4MS3 FirstGlance]. <br>
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<table><tr><td colspan='2'>[[4ms3]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MS3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4MS3 FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ABU:GAMMA-AMINO-BUTANOIC+ACID'>ABU</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4mqe|4mqe]], [[4mqf|4mqf]], [[4mr7|4mr7]], [[4mr8|4mr8]], [[4mr9|4mr9]], [[4mrm|4mrm]], [[4ms1|4ms1]], [[4ms4|4ms4]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ABU:GAMMA-AMINO-BUTANOIC+ACID'>ABU</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GABBR1, GPRC3A ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), GABBR2, GPR51, GPRC3B ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4ms3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ms3 OCA], [https://pdbe.org/4ms3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4ms3 RCSB], [https://www.ebi.ac.uk/pdbsum/4ms3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4ms3 ProSAT]</span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ms3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ms3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4ms3 RCSB], [http://www.ebi.ac.uk/pdbsum/4ms3 PDBsum]</span></td></tr>
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</table>
</table>
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/GABR1_HUMAN GABR1_HUMAN]] Component of a heterodimeric G-protein coupled receptor for GABA, formed by GABBR1 and GABBR2. Within the heterodimeric GABA receptor, only GABBR1 seems to bind agonists, while GABBR2 mediates coupling to G proteins. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling inhibits adenylate cyclase, stimulates phospholipase A2, activates potassium channels, inactivates voltage-dependent calcium-channels and modulates inositol phospholipid hydrolysis. Calcium is required for high affinity binding to GABA. Plays a critical role in the fine-tuning of inhibitory synaptic transmission. Pre-synaptic GABA receptor inhibits neurotransmitter release by down-regulating high-voltage activated calcium channels, whereas postsynaptic GABA receptor decreases neuronal excitability by activating a prominent inwardly rectifying potassium (Kir) conductance that underlies the late inhibitory postsynaptic potentials. Not only implicated in synaptic inhibition but also in hippocampal long-term potentiation, slow wave sleep, muscle relaxation and antinociception. Activated by (-)-baclofen, cgp27492 and blocked by phaclofen.<ref>PMID:9844003</ref> <ref>PMID:9872316</ref> <ref>PMID:18165688</ref> <ref>PMID:22660477</ref> Isoform 1E may regulate the formation of functional GABBR1/GABBR2 heterodimers by competing for GABBR2 binding. This could explain the observation that certain small molecule ligands exhibit differential affinity for central versus peripheral sites.<ref>PMID:9844003</ref> <ref>PMID:9872316</ref> <ref>PMID:18165688</ref> <ref>PMID:22660477</ref> [[http://www.uniprot.org/uniprot/GABR2_HUMAN GABR2_HUMAN]] Component of a heterodimeric G-protein coupled receptor for GABA, formed by GABBR1 and GABBR2. Within the heterodimeric GABA receptor, only GABBR1 seems to bind agonists, while GABBR2 mediates coupling to G proteins. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling inhibits adenylate cyclase, stimulates phospholipase A2, activates potassium channels, inactivates voltage-dependent calcium-channels and modulates inositol phospholipid hydrolysis. Plays a critical role in the fine-tuning of inhibitory synaptic transmission. Pre-synaptic GABA receptor inhibits neurotransmitter release by down-regulating high-voltage activated calcium channels, whereas postsynaptic GABA receptor decreases neuronal excitability by activating a prominent inwardly rectifying potassium (Kir) conductance that underlies the late inhibitory postsynaptic potentials. Not only implicated in synaptic inhibition but also in hippocampal long-term potentiation, slow wave sleep, muscle relaxation and antinociception.<ref>PMID:9872316</ref> <ref>PMID:10328880</ref> <ref>PMID:18165688</ref> <ref>PMID:22660477</ref>
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[https://www.uniprot.org/uniprot/GABR1_HUMAN GABR1_HUMAN] Component of a heterodimeric G-protein coupled receptor for GABA, formed by GABBR1 and GABBR2. Within the heterodimeric GABA receptor, only GABBR1 seems to bind agonists, while GABBR2 mediates coupling to G proteins. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling inhibits adenylate cyclase, stimulates phospholipase A2, activates potassium channels, inactivates voltage-dependent calcium-channels and modulates inositol phospholipid hydrolysis. Calcium is required for high affinity binding to GABA. Plays a critical role in the fine-tuning of inhibitory synaptic transmission. Pre-synaptic GABA receptor inhibits neurotransmitter release by down-regulating high-voltage activated calcium channels, whereas postsynaptic GABA receptor decreases neuronal excitability by activating a prominent inwardly rectifying potassium (Kir) conductance that underlies the late inhibitory postsynaptic potentials. Not only implicated in synaptic inhibition but also in hippocampal long-term potentiation, slow wave sleep, muscle relaxation and antinociception. Activated by (-)-baclofen, cgp27492 and blocked by phaclofen.<ref>PMID:9844003</ref> <ref>PMID:9872316</ref> <ref>PMID:18165688</ref> <ref>PMID:22660477</ref> Isoform 1E may regulate the formation of functional GABBR1/GABBR2 heterodimers by competing for GABBR2 binding. This could explain the observation that certain small molecule ligands exhibit differential affinity for central versus peripheral sites.<ref>PMID:9844003</ref> <ref>PMID:9872316</ref> <ref>PMID:18165688</ref> <ref>PMID:22660477</ref>
<div style="background-color:#fffaf0;">
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
</div>
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<div class="pdbe-citations 4ms3" style="background-color:#fffaf0;"></div>
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==See Also==
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*[[GABA receptor|GABA receptor]]
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*[[GABA receptor 3D structures|GABA receptor 3D structures]]
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*[[Neurotransmitters|Neurotransmitters]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Human]]
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[[Category: Homo sapiens]]
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[[Category: Bush, M]]
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[[Category: Large Structures]]
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[[Category: Fan, Q R]]
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[[Category: Bush M]]
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[[Category: Geng, Y]]
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[[Category: Fan QR]]
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[[Category: Mosyak, L]]
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[[Category: Geng Y]]
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[[Category: Wang, F]]
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[[Category: Mosyak L]]
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[[Category: Heterodimeric protein complex]]
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[[Category: Wang F]]
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[[Category: Neurotransmitter receptor]]
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[[Category: Signaling protein-agonist complex]]
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[[Category: Venus flytrap module]]
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Current revision

Crystal structure of the extracellular domain of human GABA(B) receptor bound to the endogenous agonist GABA

PDB ID 4ms3

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