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- PDB-1nnk: X-ray structure of the GluR2 ligand-binding core (S1S2J) in compl... -
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Basic information
Entry | Database: PDB / ID: 1nnk | ||||||
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Title | X-ray structure of the GluR2 ligand-binding core (S1S2J) in complex with (S)-ATPA at 1.85 A resolution. Crystallization with zinc ions. | ||||||
![]() | Glutamate receptor 2 | ||||||
![]() | MEMBRANE PROTEIN / Ionotropic glutamate receptor GluR2 / ligand-binding core / agonist complex | ||||||
Function / homology | ![]() spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / kainate selective glutamate receptor activity ...spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / kainate selective glutamate receptor activity / AMPA glutamate receptor complex / cellular response to glycine / extracellularly glutamate-gated ion channel activity / ionotropic glutamate receptor complex / immunoglobulin binding / asymmetric synapse / regulation of receptor recycling / glutamate receptor binding / Unblocking of NMDA receptors, glutamate binding and activation / positive regulation of synaptic transmission / response to fungicide / regulation of synaptic transmission, glutamatergic / glutamate-gated receptor activity / cytoskeletal protein binding / presynaptic active zone membrane / extracellular ligand-gated monoatomic ion channel activity / cellular response to brain-derived neurotrophic factor stimulus / glutamate-gated calcium ion channel activity / somatodendritic compartment / ionotropic glutamate receptor binding / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / ionotropic glutamate receptor signaling pathway / dendrite cytoplasm / SNARE binding / dendritic shaft / PDZ domain binding / synaptic transmission, glutamatergic / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / protein tetramerization / synaptic membrane / establishment of protein localization / postsynaptic density membrane / modulation of chemical synaptic transmission / cerebral cortex development / receptor internalization / Schaffer collateral - CA1 synapse / terminal bouton / synaptic vesicle membrane / synaptic vesicle / signaling receptor activity / presynapse / amyloid-beta binding / presynaptic membrane / growth cone / scaffold protein binding / chemical synaptic transmission / dendritic spine / perikaryon / postsynaptic membrane / neuron projection / postsynaptic density / axon / neuronal cell body / synapse / dendrite / protein-containing complex binding / protein kinase binding / glutamatergic synapse / cell surface / endoplasmic reticulum / protein-containing complex / identical protein binding / membrane / plasma membrane Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Lunn, M.-L. / Hogner, A. / Stensbol, T.B. / Gouaux, E. / Egebjerg, J. / Kastrup, J.S. | ||||||
![]() | ![]() Title: Three-Dimensional Structure of the Ligand-Binding Core of GluR2 in Complex with the Agonist (S)-ATPA: Implications for Receptor Subunit Selectivity. Authors: Lunn, M.L. / Hogner, A. / Stensbol, T.B. / Gouaux, E. / Egebjerg, J. / Kastrup, J.S. #1: ![]() Title: Structural basis for AMPA receptor activation and ligand selectivity: Crystal structures of five agonist complexes with the GluR2 ligand binding core. Authors: Hogner, A. / Kastrup, J.S. / Jin, R. / Liljefors, T. / Mayer, M.L. / Egebjerg, J. / Larsen, I. / Gouaux, E. #2: ![]() Title: Mechanisms for activation and antagonism of an AMPA-sensitive glutamate receptor: Crystal structures of the GluR2 ligand binding core. Authors: Armstrong, N. / Gouaux, E. #3: ![]() Title: Mechanism of glutamate receptor desensitization. Authors: Sun, Y. / Olson, R. / Horning, M. / Armstrong, N. / Mayer, M. / Gouaux, E. #4: ![]() Title: Probing the ligand binding domain of the GluR2 receptor by proteolysis and deletion mutagenesis defines domain boundaries and yields a crystallizable construct. Authors: Chen, G.Q. / Sun, R. / Jin, R. / Gouaux, E. | ||||||
History |
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Remark 300 | BIOMOLECULE: 1 THIS ENTRY CONTAINS THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT WHICH CONSISTS OF 1 ... BIOMOLECULE: 1 THIS ENTRY CONTAINS THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT WHICH CONSISTS OF 1 CHAIN(S). SEE REMARK 350 FOR INFORMATION ON GENERATING THE BIOLOGICAL MOLECULE(S). NOTE THAT COORDINATES FOR ONE DIMER OF THE TETRAMERIC MULTIMER REPRESENTING THE KNOWN BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS GIVEN IN REMARK 350. | ||||||
Remark 999 | SEQUENCE Native GluR2 is a membrane protein. The protein crystallized is the extracellular ligand- ...SEQUENCE Native GluR2 is a membrane protein. The protein crystallized is the extracellular ligand-binding core of GluR2. Transmembrane regions were genetically removed and replaced with a Gly-Thr linker (residues 115-116). Therefore, the sequence matches discontinuously with the reference database (413-527, 653-796). The two first residues of the sequence (Gly-2, Ala-1) are cloning artifacts and were not located in the electron density map. |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 72.5 KB | Display | ![]() |
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PDB format | ![]() | 52.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 455.2 KB | Display | ![]() |
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Full document | ![]() | 460.5 KB | Display | |
Data in XML | ![]() | 14.2 KB | Display | |
Data in CIF | ![]() | 20 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
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Assembly
Deposited unit | ![]()
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1 | ![]()
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Unit cell |
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Details | The biological assembly is a tetramer composed of dimers-of-dimers. Only the dimer is observed in the crystal. The dimer may be generated by applying the following to chain A: TRANSFORM FRACTIONAL - -1.00000 0.00000 0.00000 - 0.00000 -1.00000 0.00000 - 0.00000 0.00000 1.00000 - 2.00000 0.00000 0.00000 |
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Components
#1: Protein | Mass: 29221.682 Da / Num. of mol.: 1 / Fragment: GluR2-flop ligand-binding core (S1S2J) Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() | ||||||||
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#2: Chemical | #3: Chemical | ChemComp-CL / | #4: Chemical | ChemComp-CE2 / | #5: Water | ChemComp-HOH / | Has protein modification | Y | |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.4 Å3/Da / Density % sol: 49 % | ||||||||||||||||||||||||||||||||||||
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Crystal grow | Temperature: 279 K / Method: vapor diffusion, hanging drop / pH: 5.5 Details: zinc acetate, cacodylate, PEG8000, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 279K | ||||||||||||||||||||||||||||||||||||
Crystal grow | *PLUS Temperature: 6 ℃ | ||||||||||||||||||||||||||||||||||||
Components of the solutions | *PLUS
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-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: MARRESEARCH / Detector: CCD / Date: Mar 14, 2001 |
Radiation | Monochromator: NULL. / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1.0835 Å / Relative weight: 1 |
Reflection | Resolution: 1.85→20 Å / Num. all: 23016 / Num. obs: 23016 / % possible obs: 92.6 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.5 % / Biso Wilson estimate: 18.2 Å2 / Rmerge(I) obs: 0.099 / Net I/σ(I): 7 |
Reflection shell | Resolution: 1.85→1.92 Å / Rmerge(I) obs: 0.34 / Mean I/σ(I) obs: 2 / Num. unique all: 1996 / % possible all: 82.1 |
Reflection | *PLUS Lowest resolution: 20 Å |
Reflection shell | *PLUS % possible obs: 82.1 % / Rmerge(I) obs: 0.34 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: GluR2:(S)-thio-ATPA complex (Lunn et al., to be published). Resolution: 1.85→19.99 Å / Rfactor Rfree error: 0.009 / Data cutoff high rms absF: 1449707.81 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber Details: The first three N-terminal residues and the last two C-terminal residues were not located in the electron density map.
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Solvent computation | Solvent model: FLAT MODEL / Bsol: 48.7733 Å2 / ksol: 0.418009 e/Å3 | ||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 27.4 Å2
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Refine analyze |
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Refinement step | Cycle: LAST / Resolution: 1.85→19.99 Å
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Refine LS restraints |
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LS refinement shell | Resolution: 1.85→1.97 Å / Rfactor Rfree error: 0.029 / Total num. of bins used: 6
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Xplor file | Serial no: 1 / Param file: protein_rep.param / Topol file: protein.top | ||||||||||||||||||||||||||||||||||||
Refinement | *PLUS Lowest resolution: 20 Å / % reflection Rfree: 2.7 % | ||||||||||||||||||||||||||||||||||||
Solvent computation | *PLUS | ||||||||||||||||||||||||||||||||||||
Displacement parameters | *PLUS | ||||||||||||||||||||||||||||||||||||
Refine LS restraints | *PLUS
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