|
|
| Line 3: |
Line 3: |
| | <StructureSection load='5dex' size='340' side='right'caption='[[5dex]], [[Resolution|resolution]] 2.40Å' scene=''> | | <StructureSection load='5dex' size='340' side='right'caption='[[5dex]], [[Resolution|resolution]] 2.40Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5dex]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5DEX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5DEX FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5dex]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5DEX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5DEX FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=5E0:5-[(2R)-2-AMINO-2-CARBOXYETHYL]-1-PHENYL-1H-PYRAZOLE-3-CARBOXYLIC+ACID'>5E0</scene>, <scene name='pdbligand=GLY:GLYCINE'>GLY</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=5E0:5-[(2R)-2-AMINO-2-CARBOXYETHYL]-1-PHENYL-1H-PYRAZOLE-3-CARBOXYLIC+ACID'>5E0</scene>, <scene name='pdbligand=GLY:GLYCINE'>GLY</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5ddn|5ddn]], [[5ddx|5ddx]], [[5de4|5de4]]</td></tr>
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5dex FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5dex OCA], [https://pdbe.org/5dex PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5dex RCSB], [https://www.ebi.ac.uk/pdbsum/5dex PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5dex ProSAT]</span></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Grin1, Nmdar1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat]), Grin2a ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</td></tr>
| + | |
| - | <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=5dex FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5dex OCA], [http://pdbe.org/5dex PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5dex RCSB], [http://www.ebi.ac.uk/pdbsum/5dex PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5dex ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/NMDZ1_RAT NMDZ1_RAT]] NMDA receptor subtype of glutamate-gated ion channels possesses high calcium permeability and voltage-dependent sensitivity to magnesium. Mediated by glycine. Plays a key role in synaptic plasticity, synaptogenesis, excitotoxicity, memory acquisition and learning. It mediates neuronal functions in glutamate neurotransmission. Is involved in the cell surface targeting of NMDA receptors.<ref>PMID:15996549</ref> [[http://www.uniprot.org/uniprot/NMDE1_RAT NMDE1_RAT]] NMDA receptor subtype of glutamate-gated ion channels possesses high calcium permeability and voltage-dependent sensitivity to magnesium. Activation requires binding of agonist to both types of subunits. | + | [https://www.uniprot.org/uniprot/NMDZ1_RAT NMDZ1_RAT] NMDA receptor subtype of glutamate-gated ion channels possesses high calcium permeability and voltage-dependent sensitivity to magnesium. Mediated by glycine. Plays a key role in synaptic plasticity, synaptogenesis, excitotoxicity, memory acquisition and learning. It mediates neuronal functions in glutamate neurotransmission. Is involved in the cell surface targeting of NMDA receptors.<ref>PMID:15996549</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
| Line 27: |
Line 25: |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Buffalo rat]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Conti, P]] | + | [[Category: Rattus norvegicus]] |
| - | [[Category: Hansen, K B]] | + | [[Category: Conti P]] |
| - | [[Category: Mou, T C]] | + | [[Category: Hansen KB]] |
| - | [[Category: Pinto, A]] | + | [[Category: Mou T-C]] |
| - | [[Category: Sprang, S R]] | + | [[Category: Pinto A]] |
| - | [[Category: Tamborini, L]] | + | [[Category: Sprang SR]] |
| - | [[Category: Receptor]]
| + | [[Category: Tamborini L]] |
| - | [[Category: Transport protein]]
| + | |
| Structural highlights
Function
NMDZ1_RAT NMDA receptor subtype of glutamate-gated ion channels possesses high calcium permeability and voltage-dependent sensitivity to magnesium. Mediated by glycine. Plays a key role in synaptic plasticity, synaptogenesis, excitotoxicity, memory acquisition and learning. It mediates neuronal functions in glutamate neurotransmission. Is involved in the cell surface targeting of NMDA receptors.[1]
Publication Abstract from PubMed
NMDA-type glutamate receptors are ligand-gated ion channels that contribute to excitatory neurotransmission in the central nervous system (CNS). Most NMDA receptors comprise two glycine-binding GluN1 and two glutamate-binding GluN2 subunits (GluN2A-D). We describe highly potent (S)-5-[(R)-2-amino-2-carboxyethyl]-4,5-dihydro-1H-pyrazole-3-carboxylic acid (ACEPC) competitive GluN2 antagonists, of which ST3 has a binding affinity of 52 nM at GluN1/2A and 782 nM at GluN1/2B receptors. This 15-fold preference of ST3 for GluN1/2A over GluN1/2B is improved compared with NVP-AAM077, a widely used GluN2A-selective antagonist, which we show has 11-fold preference for GluN1/2A over GluN1/2B. Crystal structures of the GluN1/2A agonist binding domain (ABD) heterodimer with bound ACEPC antagonists reveal a binding mode in which the ligands occupy a cavity that extends toward the subunit interface between GluN1 and GluN2A ABDs. Mutational analyses show that the GluN2A preference of ST3 is primarily mediated by four nonconserved residues that are not directly contacting the ligand, but positioned within 12 A of the glutamate binding site. Two of these residues influence the cavity occupied by ST3 in a manner that results in favorable binding to GluN2A, but occludes binding to GluN2B. Thus, we reveal opportunities for the design of subunit-selective competitive NMDA receptor antagonists by identifying a cavity for ligand binding in which variations exist between GluN2A and GluN2B subunits. This structural insight suggests that subunit selectivity of glutamate-site antagonists can be mediated by mechanisms in addition to direct contributions of contact residues to binding affinity.
Structural basis of subunit selectivity for competitive NMDA receptor antagonists with preference for GluN2A over GluN2B subunits.,Lind GE, Mou TC, Tamborini L, Pomper MG, De Micheli C, Conti P, Pinto A, Hansen KB Proc Natl Acad Sci U S A. 2017 Aug 15;114(33):E6942-E6951. doi:, 10.1073/pnas.1707752114. Epub 2017 Jul 31. PMID:28760974[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Inanobe A, Furukawa H, Gouaux E. Mechanism of partial agonist action at the NR1 subunit of NMDA receptors. Neuron. 2005 Jul 7;47(1):71-84. PMID:15996549 doi:10.1016/j.neuron.2005.05.022
- ↑ Lind GE, Mou TC, Tamborini L, Pomper MG, De Micheli C, Conti P, Pinto A, Hansen KB. Structural basis of subunit selectivity for competitive NMDA receptor antagonists with preference for GluN2A over GluN2B subunits. Proc Natl Acad Sci U S A. 2017 Aug 15;114(33):E6942-E6951. doi:, 10.1073/pnas.1707752114. Epub 2017 Jul 31. PMID:28760974 doi:http://dx.doi.org/10.1073/pnas.1707752114
|
