HEADER    TRANSPORT PROTEIN                       23-MAR-11   3R7X              
TITLE     CRYSTAL STRUCTURE ANALYSIS OF A QUINAZOLINEDIONE SULFONAMIDE BOUND TO 
TITLE    2 HUMAN GLUR2: A NOVEL CLASS OF COMPETITIVE AMPA RECEPTOR ANTAGONISTS  
TITLE    3 WITH ORAL ACTIVITY                                                   
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: GLUTAMATE RECEPTOR 2;                                      
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 FRAGMENT: SEE REMARK 999;                                            
COMPND   5 SYNONYM: GLUR-2, AMPA-SELECTIVE GLUTAMATE RECEPTOR 2, GLUR-B, GLUR-  
COMPND   6 K2, GLUTAMATE RECEPTOR IONOTROPIC, AMPA 2, GLUA2;                    
COMPND   7 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: DE3;                                       
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PXI472D                                   
KEYWDS    ION CHANNEL, IONIC CHANNEL, POSTSYNAPTIC MEMBRANE, TRANSMEMBRANE,     
KEYWDS   2 TRANSPORT PROTEIN                                                    
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    J.KALLEN                                                              
REVDAT   4   27-NOV-24 3R7X    1       REMARK SEQADV                            
REVDAT   3   26-JUL-17 3R7X    1       SOURCE REMARK                            
REVDAT   2   25-MAY-11 3R7X    1       JRNL                                     
REVDAT   1   18-MAY-11 3R7X    0                                                
JRNL        AUTH   M.KOLLER,K.LINGENHOEHL,M.SCHMUTZ,I.T.VRANESIC,J.KALLEN,      
JRNL        AUTH 2 Y.P.AUBERSON,D.A.CARCACHE,H.MATTES,S.OFNER,D.ORAIN,S.URWYLER 
JRNL        TITL   QUINAZOLINEDIONE SULFONAMIDES: A NOVEL CLASS OF COMPETITIVE  
JRNL        TITL 2 AMPA RECEPTOR ANTAGONISTS WITH ORAL ACTIVITY.                
JRNL        REF    BIOORG.MED.CHEM.LETT.         V.  21  3358 2011              
JRNL        REFN                   ISSN 0960-894X                               
JRNL        PMID   21531559                                                     
JRNL        DOI    10.1016/J.BMCL.2011.04.017                                   
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.10 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC                                               
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.10                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.2                           
REMARK   3   NUMBER OF REFLECTIONS             : 29411                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.206                           
REMARK   3   R VALUE            (WORKING SET) : 0.204                           
REMARK   3   FREE R VALUE                     : 0.250                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.100                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1491                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.10                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.16                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 1905                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 93.75                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1990                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 104                          
REMARK   3   BIN FREE R VALUE                    : 0.2800                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4048                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 35                                      
REMARK   3   SOLVENT ATOMS            : 446                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 23.54                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -0.34000                                             
REMARK   3    B22 (A**2) : 0.63000                                              
REMARK   3    B33 (A**2) : -0.30000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.297         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.216         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.135         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 4.944         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.931                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.899                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  4158 ; 0.009 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  5597 ; 1.144 ; 1.982       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   514 ; 5.278 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):   166 ;31.503 ;24.217       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   791 ;14.339 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):    22 ;16.157 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   615 ; 0.076 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  3029 ; 0.005 ; 0.021       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):  2552 ; 0.510 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  4104 ; 0.958 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  1606 ; 1.427 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  1493 ; 2.376 ; 4.500       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                              
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : MASK                                                 
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.40                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS:                                           
REMARK   3  HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS                   
REMARK   3  U VALUES      : REFINED INDIVIDUALLY                                
REMARK   4                                                                      
REMARK   4 3R7X COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 29-MAR-11.                  
REMARK 100 THE DEPOSITION ID IS D_1000064601.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 09-SEP-04                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 4.6                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : SLS                                
REMARK 200  BEAMLINE                       : X10SA                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.800                              
REMARK 200  MONOCHROMATOR                  : SI 111 CHANNEL                     
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MAR                                
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 29462                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.100                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 20.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.3                               
REMARK 200  DATA REDUNDANCY                : 4.900                              
REMARK 200  R MERGE                    (I) : 0.06600                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 14.5000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.10                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.17                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 95.6                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 2.30                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.10800                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: MOLREP                                                
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 41.78                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.11                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 100 MM SODIUM ACETATE, 200 MM AMMONIUM   
REMARK 280  ACETATE, 28% PEG4000, PH 4.6, HANGING DROP, TEMPERATURE 277K        
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21                       
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X+1/2,-Y,Z+1/2                                         
REMARK 290       3555   -X,Y+1/2,-Z+1/2                                         
REMARK 290       4555   X+1/2,-Y+1/2,-Z                                         
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000       28.68000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       48.81300            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       44.28900            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       48.81300            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       28.68000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       44.28900            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 2230 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 23520 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -9.0 KCAL/MOL                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B                                  
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     GLY A     1                                                      
REMARK 465     PRO A     2                                                      
REMARK 465     GLY A   262                                                      
REMARK 465     SER A   263                                                      
REMARK 465     GLY B     1                                                      
REMARK 465     PRO B     2                                                      
REMARK 465     ASN B     3                                                      
REMARK 465     LYS B     4                                                      
REMARK 465     GLY B   262                                                      
REMARK 465     SER B   263                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     CYS B 261    O                                                   
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   O    HOH A   452     O    HOH B   430              2.12            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   N    ASN A     3     O    HOH A   348     3644     2.10            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    ASN A  22       41.79   -105.64                                   
REMARK 500    PRO A 120       49.76    -72.69                                   
REMARK 500    ASN B  22       44.15    -94.74                                   
REMARK 500    PRO B  89       60.69    -68.96                                   
REMARK 500    TRP B 255      -92.32    -92.41                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE QSN A 264                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GLU B 264                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 2CMO   RELATED DB: PDB                                   
REMARK 900 RAT GLUR2 (INSTEAD OF HUMAN GLUR2), ALSO A MIXED DIMER WITH AN       
REMARK 900 ANTAGONIST AND (S)-GLUTAMATE BOUND                                   
REMARK 999                                                                      
REMARK 999 SEQUENCE                                                             
REMARK 999 PROTEIN FRAGMENT CONSISTS OF UNP RESIDUES 413-527 CONNECTED TO UNP   
REMARK 999 RESIDUES 653-796 VIA AN ENGINEERED GT LINKER                         
DBREF  3R7X A    3   117  UNP    P42262   GRIA2_HUMAN    413    527             
DBREF  3R7X A  120   263  UNP    P42262   GRIA2_HUMAN    653    796             
DBREF  3R7X B    3   117  UNP    P42262   GRIA2_HUMAN    413    527             
DBREF  3R7X B  120   263  UNP    P42262   GRIA2_HUMAN    653    796             
SEQADV 3R7X GLY A    1  UNP  P42262              CLONING ARTIFACT               
SEQADV 3R7X PRO A    2  UNP  P42262              CLONING ARTIFACT               
SEQADV 3R7X GLY A  118  UNP  P42262              LINKER                         
SEQADV 3R7X THR A  119  UNP  P42262              LINKER                         
SEQADV 3R7X GLY B    1  UNP  P42262              CLONING ARTIFACT               
SEQADV 3R7X PRO B    2  UNP  P42262              CLONING ARTIFACT               
SEQADV 3R7X GLY B  118  UNP  P42262              LINKER                         
SEQADV 3R7X THR B  119  UNP  P42262              LINKER                         
SEQRES   1 A  263  GLY PRO ASN LYS THR VAL VAL VAL THR THR ILE LEU GLU          
SEQRES   2 A  263  SER PRO TYR VAL MET MET LYS LYS ASN HIS GLU MET LEU          
SEQRES   3 A  263  GLU GLY ASN GLU ARG TYR GLU GLY TYR CYS VAL ASP LEU          
SEQRES   4 A  263  ALA ALA GLU ILE ALA LYS HIS CYS GLY PHE LYS TYR LYS          
SEQRES   5 A  263  LEU THR ILE VAL GLY ASP GLY LYS TYR GLY ALA ARG ASP          
SEQRES   6 A  263  ALA ASP THR LYS ILE TRP ASN GLY MET VAL GLY GLU LEU          
SEQRES   7 A  263  VAL TYR GLY LYS ALA ASP ILE ALA ILE ALA PRO LEU THR          
SEQRES   8 A  263  ILE THR LEU VAL ARG GLU GLU VAL ILE ASP PHE SER LYS          
SEQRES   9 A  263  PRO PHE MET SER LEU GLY ILE SER ILE MET ILE LYS LYS          
SEQRES  10 A  263  GLY THR PRO ILE GLU SER ALA GLU ASP LEU SER LYS GLN          
SEQRES  11 A  263  THR GLU ILE ALA TYR GLY THR LEU ASP SER GLY SER THR          
SEQRES  12 A  263  LYS GLU PHE PHE ARG ARG SER LYS ILE ALA VAL PHE ASP          
SEQRES  13 A  263  LYS MET TRP THR TYR MET ARG SER ALA GLU PRO SER VAL          
SEQRES  14 A  263  PHE VAL ARG THR THR ALA GLU GLY VAL ALA ARG VAL ARG          
SEQRES  15 A  263  LYS SER LYS GLY LYS TYR ALA TYR LEU LEU GLU SER THR          
SEQRES  16 A  263  MET ASN GLU TYR ILE GLU GLN ARG LYS PRO CYS ASP THR          
SEQRES  17 A  263  MET LYS VAL GLY GLY ASN LEU ASP SER LYS GLY TYR GLY          
SEQRES  18 A  263  ILE ALA THR PRO LYS GLY SER SER LEU ARG ASN ALA VAL          
SEQRES  19 A  263  ASN LEU ALA VAL LEU LYS LEU ASN GLU GLN GLY LEU LEU          
SEQRES  20 A  263  ASP LYS LEU LYS ASN LYS TRP TRP TYR ASP LYS GLY GLU          
SEQRES  21 A  263  CYS GLY SER                                                  
SEQRES   1 B  263  GLY PRO ASN LYS THR VAL VAL VAL THR THR ILE LEU GLU          
SEQRES   2 B  263  SER PRO TYR VAL MET MET LYS LYS ASN HIS GLU MET LEU          
SEQRES   3 B  263  GLU GLY ASN GLU ARG TYR GLU GLY TYR CYS VAL ASP LEU          
SEQRES   4 B  263  ALA ALA GLU ILE ALA LYS HIS CYS GLY PHE LYS TYR LYS          
SEQRES   5 B  263  LEU THR ILE VAL GLY ASP GLY LYS TYR GLY ALA ARG ASP          
SEQRES   6 B  263  ALA ASP THR LYS ILE TRP ASN GLY MET VAL GLY GLU LEU          
SEQRES   7 B  263  VAL TYR GLY LYS ALA ASP ILE ALA ILE ALA PRO LEU THR          
SEQRES   8 B  263  ILE THR LEU VAL ARG GLU GLU VAL ILE ASP PHE SER LYS          
SEQRES   9 B  263  PRO PHE MET SER LEU GLY ILE SER ILE MET ILE LYS LYS          
SEQRES  10 B  263  GLY THR PRO ILE GLU SER ALA GLU ASP LEU SER LYS GLN          
SEQRES  11 B  263  THR GLU ILE ALA TYR GLY THR LEU ASP SER GLY SER THR          
SEQRES  12 B  263  LYS GLU PHE PHE ARG ARG SER LYS ILE ALA VAL PHE ASP          
SEQRES  13 B  263  LYS MET TRP THR TYR MET ARG SER ALA GLU PRO SER VAL          
SEQRES  14 B  263  PHE VAL ARG THR THR ALA GLU GLY VAL ALA ARG VAL ARG          
SEQRES  15 B  263  LYS SER LYS GLY LYS TYR ALA TYR LEU LEU GLU SER THR          
SEQRES  16 B  263  MET ASN GLU TYR ILE GLU GLN ARG LYS PRO CYS ASP THR          
SEQRES  17 B  263  MET LYS VAL GLY GLY ASN LEU ASP SER LYS GLY TYR GLY          
SEQRES  18 B  263  ILE ALA THR PRO LYS GLY SER SER LEU ARG ASN ALA VAL          
SEQRES  19 B  263  ASN LEU ALA VAL LEU LYS LEU ASN GLU GLN GLY LEU LEU          
SEQRES  20 B  263  ASP LYS LEU LYS ASN LYS TRP TRP TYR ASP LYS GLY GLU          
SEQRES  21 B  263  CYS GLY SER                                                  
HET    QSN  A 264      25                                                       
HET    GLU  B 264      10                                                       
HETNAM     QSN N-[6-(1H-IMIDAZOL-1-YL)-7-NITRO-2,4-DIOXO-1,4-                   
HETNAM   2 QSN  DIHYDROQUINAZOLIN-3(2H)-YL]METHANESULFONAMIDE                   
HETNAM     GLU GLUTAMIC ACID                                                    
FORMUL   3  QSN    C12 H10 N6 O6 S                                              
FORMUL   4  GLU    C5 H9 N O4                                                   
FORMUL   5  HOH   *446(H2 O)                                                    
HELIX    1   1 ASN A   22  LEU A   26  5                                   5    
HELIX    2   2 GLU A   27  GLU A   30  5                                   4    
HELIX    3   3 GLY A   34  GLY A   48  1                                  15    
HELIX    4   4 ASN A   72  TYR A   80  1                                   9    
HELIX    5   5 THR A   93  GLU A   98  1                                   6    
HELIX    6   6 SER A  123  LYS A  129  1                                   7    
HELIX    7   7 GLY A  141  SER A  150  1                                  10    
HELIX    8   8 ILE A  152  ALA A  165  1                                  14    
HELIX    9   9 THR A  173  LYS A  183  1                                  11    
HELIX   10  10 SER A  194  GLN A  202  1                                   9    
HELIX   11  11 LEU A  230  GLN A  244  1                                  15    
HELIX   12  12 GLY A  245  TYR A  256  1                                  12    
HELIX   13  13 ASN B   22  LEU B   26  5                                   5    
HELIX   14  14 GLU B   27  GLU B   30  5                                   4    
HELIX   15  15 GLY B   34  GLY B   48  1                                  15    
HELIX   16  16 ASN B   72  TYR B   80  1                                   9    
HELIX   17  17 THR B   93  GLU B   98  1                                   6    
HELIX   18  18 SER B  123  LYS B  129  1                                   7    
HELIX   19  19 GLY B  141  SER B  150  1                                  10    
HELIX   20  20 ILE B  152  ALA B  165  1                                  14    
HELIX   21  21 THR B  173  SER B  184  1                                  12    
HELIX   22  22 SER B  194  GLN B  202  1                                   9    
HELIX   23  23 LEU B  230  GLN B  244  1                                  15    
HELIX   24  24 GLY B  245  TRP B  255  1                                  11    
HELIX   25  25 TYR B  256  GLY B  259  5                                   4    
SHEET    1   A 3 TYR A  51  ILE A  55  0                                        
SHEET    2   A 3 VAL A   6  THR A  10  1  N  VAL A   8   O  THR A  54           
SHEET    3   A 3 ILE A  85  ALA A  86  1  O  ILE A  85   N  THR A   9           
SHEET    1   B 2 MET A  18  MET A  19  0                                        
SHEET    2   B 2 TYR A  32  GLU A  33 -1  O  GLU A  33   N  MET A  18           
SHEET    1   C 2 ILE A 100  PHE A 102  0                                        
SHEET    2   C 2 ALA A 223  PRO A 225 -1  O  THR A 224   N  ASP A 101           
SHEET    1   D 2 MET A 107  LEU A 109  0                                        
SHEET    2   D 2 LYS A 218  TYR A 220 -1  O  LYS A 218   N  LEU A 109           
SHEET    1   E 4 ALA A 134  GLY A 136  0                                        
SHEET    2   E 4 TYR A 188  GLU A 193  1  O  ALA A 189   N  ALA A 134           
SHEET    3   E 4 ILE A 111  LYS A 116 -1  N  MET A 114   O  TYR A 190           
SHEET    4   E 4 THR A 208  VAL A 211 -1  O  MET A 209   N  ILE A 115           
SHEET    1   F 3 TYR B  51  ILE B  55  0                                        
SHEET    2   F 3 VAL B   6  THR B  10  1  N  VAL B   8   O  THR B  54           
SHEET    3   F 3 ILE B  85  ALA B  86  1  O  ILE B  85   N  THR B   9           
SHEET    1   G 2 MET B  18  MET B  19  0                                        
SHEET    2   G 2 TYR B  32  GLU B  33 -1  O  GLU B  33   N  MET B  18           
SHEET    1   H 2 ILE B 100  PHE B 102  0                                        
SHEET    2   H 2 ALA B 223  PRO B 225 -1  O  THR B 224   N  ASP B 101           
SHEET    1   I 2 MET B 107  LEU B 109  0                                        
SHEET    2   I 2 LYS B 218  TYR B 220 -1  O  LYS B 218   N  LEU B 109           
SHEET    1   J 4 ALA B 134  GLY B 136  0                                        
SHEET    2   J 4 TYR B 188  GLU B 193  1  O  ALA B 189   N  ALA B 134           
SHEET    3   J 4 ILE B 111  LYS B 116 -1  N  MET B 114   O  TYR B 190           
SHEET    4   J 4 THR B 208  VAL B 211 -1  O  MET B 209   N  ILE B 115           
SSBOND   1 CYS A  206    CYS A  261                          1555   1555  2.03  
SSBOND   2 CYS B  206    CYS B  261                          1555   1555  2.04  
CISPEP   1 SER A   14    PRO A   15          0         0.56                     
CISPEP   2 GLU A  166    PRO A  167          0        -0.29                     
CISPEP   3 LYS A  204    PRO A  205          0         8.70                     
CISPEP   4 SER B   14    PRO B   15          0         2.64                     
CISPEP   5 GLU B  166    PRO B  167          0        -8.57                     
CISPEP   6 LYS B  204    PRO B  205          0         2.73                     
SITE     1 AC1 12 GLU A  13  TYR A  16  TYR A  61  PRO A  89                    
SITE     2 AC1 12 LEU A  90  THR A  91  ARG A  96  THR A 174                    
SITE     3 AC1 12 TYR A 220  HOH A 278  HOH A 349  HOH A 458                    
SITE     1 AC2 12 TYR B  61  PRO B  89  LEU B  90  THR B  91                    
SITE     2 AC2 12 ARG B  96  GLY B 141  SER B 142  THR B 143                    
SITE     3 AC2 12 GLU B 193  TYR B 220  HOH B 294  HOH B 315                    
CRYST1   57.360   88.578   97.626  90.00  90.00  90.00 P 21 21 21    8          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.017434  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.011289  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.010243        0.00000