HEADER MEMBRANE PROTEIN 11-AUG-05 2ANJ TITLE CRYSTAL STRUCTURE OF THE GLUR2 LIGAND BINDING CORE (S1S2J-Y450W) TITLE 2 MUTANT IN COMPLEX WITH THE PARTIAL AGONIST KAINIC ACID AT 2.1 A TITLE 3 RESOLUTION COMPND MOL_ID: 1; COMPND 2 MOLECULE: GLUTAMATE RECEPTOR 2; COMPND 3 CHAIN: A; COMPND 4 FRAGMENT: LIGAND BINDING CORE; COMPND 5 SYNONYM: GLUR-2, GLUR-B, GLUR-K2, GLUTAMATE RECEPTOR IONOTROPIC, AMPA COMPND 6 2; COMPND 7 ENGINEERED: YES; COMPND 8 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS; SOURCE 3 ORGANISM_COMMON: NORWAY RAT; SOURCE 4 ORGANISM_TAXID: 10116; SOURCE 5 GENE: GRIA2, GLUR2; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 7 EXPRESSION_SYSTEM_TAXID: 469008; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PETGQ KEYWDS IONOTROPIC GLUTAMATE RECEPTOR, GLUR2 LIGAND-BINDING CORE, AGONIST KEYWDS 2 COMPLEX, MUTANT, MEMBRANE PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR M.M.HOLM,P.NAUR,B.VESTERGAARD,M.T.GEBALLE,M.GAJHEDE,J.S.KASTRUP, AUTHOR 2 S.F.TRAYNELIS,J.EGEBJERG REVDAT 8 06-NOV-24 2ANJ 1 REMARK REVDAT 7 23-AUG-23 2ANJ 1 REMARK REVDAT 6 20-OCT-21 2ANJ 1 REMARK SEQADV REVDAT 5 11-OCT-17 2ANJ 1 REMARK REVDAT 4 02-AUG-17 2ANJ 1 SOURCE REMARK REVDAT 3 24-FEB-09 2ANJ 1 VERSN REVDAT 2 01-NOV-05 2ANJ 1 JRNL REVDAT 1 30-AUG-05 2ANJ 0 JRNL AUTH M.M.HOLM,P.NAUR,B.VESTERGAARD,M.T.GEBALLE,M.GAJHEDE, JRNL AUTH 2 J.S.KASTRUP,S.F.TRAYNELIS,J.EGEBJERG JRNL TITL A BINDING SITE TYROSINE SHAPES DESENSITIZATION KINETICS AND JRNL TITL 2 AGONIST POTENCY AT GLUR2: A MUTAGENIC, KINETIC, AND JRNL TITL 3 CRYSTALLOGRAPHIC STUDY JRNL REF J.BIOL.CHEM. V. 280 35469 2005 JRNL REFN ISSN 0021-9258 JRNL PMID 16103115 JRNL DOI 10.1074/JBC.M507800200 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH N.ARMSTRONG,E.GOUAUX REMARK 1 TITL MECHANISMS FOR ACTIVATION AND ANTAGONISM OF AN REMARK 1 TITL 2 AMPA-SENSITIVE GLUTAMATE RECEPTOR: CRYSTAL STRUCTURES OF THE REMARK 1 TITL 3 GLUR2 LIGAND BINDING CORE. REMARK 1 REF NEURON V. 28 165 2000 REMARK 1 REFN ISSN 0896-6273 REMARK 1 REFERENCE 2 REMARK 1 AUTH A.FRANDSEN,D.S.PICKERING,B.VESTERGAARD,C.KASPER,B.B.NIELSEN, REMARK 1 AUTH 2 J.R.GREENWOOD,G.CAMPIANI,C.FATTORUSSO,M.GAJHEDE,A.SCHOUSBOE, REMARK 1 AUTH 3 J.S.KASTRUP REMARK 1 TITL TYR702 IS AN IMPORTANT DETERMINANT OF AGONIST BINDING AND REMARK 1 TITL 2 DOMAIN CLOSURE OF THE LIGAND-BINDING CORE OF GLUR2. REMARK 1 REF MOL.PHARMACOL. V. 67 703 2005 REMARK 1 REFN ISSN 0026-895X REMARK 1 REFERENCE 3 REMARK 1 AUTH N.ARMSTRONG,M.MAYER,E.GOUAUX REMARK 1 TITL TUNING ACTIVATION OF THE AMPA-SENSITIVE GLUR2 ION CHANNEL BY REMARK 1 TITL 2 GENETIC ADJUSTMENT OF AGONIST-INDUCED REMARK 1 REF PROC.NATL.ACAD.SCI.USA V. 100 5736 2003 REMARK 1 REFN ISSN 0027-8424 REMARK 2 REMARK 2 RESOLUTION. 2.10 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- REMARK 3 : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU, REMARK 3 : READ,RICE,SIMONSON,WARREN REMARK 3 REMARK 3 REFINEMENT TARGET : ENGH & HUBER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.10 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 25.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 290292.490 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 89.9 REMARK 3 NUMBER OF REFLECTIONS : 15598 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 SET) : 0.187 REMARK 3 FREE R VALUE : 0.248 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 2.700 REMARK 3 FREE R VALUE TEST SET COUNT : 465 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.012 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 6 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 2.10 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.23 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 89.60 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 2471 REMARK 3 BIN R VALUE (WORKING SET) : 0.1940 REMARK 3 BIN FREE R VALUE : 0.2880 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 2.90 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 73 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.034 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2041 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 15 REMARK 3 SOLVENT ATOMS : 250 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 17.15 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 15.72 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -0.10400 REMARK 3 B22 (A**2) : -0.92600 REMARK 3 B33 (A**2) : 1.03000 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 COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : 0.21 REMARK 3 ESD FROM SIGMAA (A) : 0.10 REMARK 3 LOW RESOLUTION CUTOFF (A) : 5.00 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : 0.30 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.18 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.005 REMARK 3 BOND ANGLES (DEGREES) : 1.200 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 21.80 REMARK 3 IMPROPER ANGLES (DEGREES) : 0.770 REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : RESTRAINED REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.37 REMARK 3 BSOL : 43.37 REMARK 3 REMARK 3 NCS MODEL : NULL REMARK 3 REMARK 3 NCS RESTRAINTS. RMS SIGMA/WEIGHT REMARK 3 GROUP 1 POSITIONAL (A) : NULL ; NULL REMARK 3 GROUP 1 B-FACTOR (A**2) : NULL ; NULL REMARK 3 REMARK 3 PARAMETER FILE 1 : NULL REMARK 3 TOPOLOGY FILE 1 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: RESIDUE 263 COULD NOT BE MODELLED INTO REMARK 3 THE ELECTRON DENSITY. REMARK 4 REMARK 4 2ANJ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 19-AUG-05. REMARK 100 THE DEPOSITION ID IS D_1000034099. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 09-APR-03 REMARK 200 TEMPERATURE (KELVIN) : 100.0 REMARK 200 PH : 6.50 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : MAX II REMARK 200 BEAMLINE : I711 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.02700 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : MARRESEARCH REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 16201 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.100 REMARK 200 RESOLUTION RANGE LOW (A) : 25.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 92.9 REMARK 200 DATA REDUNDANCY : 3.800 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.10700 REMARK 200 FOR THE DATA SET : 13.6000 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) : 2.18 REMARK 200 COMPLETENESS FOR SHELL (%) : 94.0 REMARK 200 DATA REDUNDANCY IN SHELL : 3.70 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.29200 REMARK 200 FOR SHELL : 4.500 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: AMORE REMARK 200 STARTING MODEL: PDB ENTRY 1FTK REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 50.15 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.47 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 8000, CACODYLATE, LITHIUM REMARK 280 SULPHATE, PH 6.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE REMARK 280 279K, PH 6.50 REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,Z REMARK 290 3555 -X+1/2,Y+1/2,-Z 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 0.00000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 47.62700 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 30.81750 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 47.62700 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 30.81750 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 300 REMARK: THE INTACT RECEPTOR IS A TETRAMER CONSISTING OF A DIMER-OF- REMARK 300 DIMERS. ONLY THE DIMER CAN BE FOUND IN THE CRYSTAL BY APPLYING THE REMARK 300 FOLLOWING TRANSFORMATION TO CHAIN A: -1 0 0 0 -1 0 0 0 1 1 0 0 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 APPLY THE FOLLOWING TO CHAINS: A 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 350 BIOMT1 2 -1.000000 0.000000 0.000000 95.25400 REMARK 350 BIOMT2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 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 SER A 263 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 GLU A 13 112.40 -161.29 REMARK 500 PRO A 205 22.39 -79.59 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 KAI A 999 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1FW0 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE GLUR2 LIGAND BINDING CORE (S1S2J) IN REMARK 900 COMPLEX WITH KAINATE AT 2.0 A RESOLUTION REMARK 900 RELATED ID: 1LBB RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE GLUR2 LIGAND BINDING DOMAIN MUTANT (S1S2J- REMARK 900 N754D) IN COMPLEX WITH KAINATE AT 2.1 A RESOLUTION REMARK 900 RELATED ID: 1P1N RELATED DB: PDB REMARK 900 GLUR2 LIGAND BINDING CORE (S1S2J) MUTANT L650T IN COMPLEX WITH REMARK 900 KAINATE REMARK 900 RELATED ID: 1XHY RELATED DB: PDB REMARK 900 X-RAY STRUCTURE OF THE Y702F MUTANT OF THE GLUR2 LIGAND- BINDING REMARK 900 CORE (S1S2J) IN COMPLEX WITH KAINATE AT 1.85 A RESOLUTION REMARK 999 REMARK 999 SEQUENCE NATIVE GLUR2 IS A MEMBRANE PROTEIN. THE PROTEIN REMARK 999 CRYSTALLIZED IS THE EXTRACELLULAR LIGAND BINDING DOMAIN OF REMARK 999 GLUR2. TRANSMEMBRANE REGIONS WERE GENETICALLY REMOVED AND REMARK 999 REPLACED WITH A GLY-THR LINKER (RESIDUES 118-119). DBREF 2ANJ A 3 117 UNP P19491 GLR2_RAT 413 527 DBREF 2ANJ A 120 263 UNP P19491 GRIA2_RAT 653 796 SEQADV 2ANJ GLY A 1 UNP P19491 CLONING ARTIFACT SEQADV 2ANJ ALA A 2 UNP P19491 CLONING ARTIFACT SEQADV 2ANJ TRP A 61 UNP P19491 TYR 471 ENGINEERED MUTATION SEQADV 2ANJ GLY A 118 UNP P19491 SEE REMARK 999 SEQADV 2ANJ THR A 119 UNP P19491 SEE REMARK 999 SEQRES 1 A 263 GLY ALA 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 TRP 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 GLY 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 HET KAI A 999 15 HETNAM KAI 3-(CARBOXYMETHYL)-4-ISOPROPENYLPROLINE HETSYN KAI KAINATE FORMUL 2 KAI C10 H15 N O4 FORMUL 3 HOH *250(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 SER A 184 1 12 HELIX 10 10 SER A 194 GLU A 201 1 8 HELIX 11 11 LEU A 230 GLN A 244 1 15 HELIX 12 12 GLY A 245 TYR A 256 1 12 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 LEU A 191 N GLY A 136 SHEET 3 E 4 ILE A 111 LYS A 116 -1 N SER A 112 O LEU A 192 SHEET 4 E 4 THR A 208 VAL A 211 -1 O MET A 209 N ILE A 115 SSBOND 1 CYS A 206 CYS A 261 1555 1555 2.03 CISPEP 1 SER A 14 PRO A 15 0 0.18 CISPEP 2 GLU A 166 PRO A 167 0 -0.15 CISPEP 3 LYS A 204 PRO A 205 0 0.17 SITE 1 AC1 12 GLU A 13 TRP A 61 PRO A 89 THR A 91 SITE 2 AC1 12 ARG A 96 LEU A 138 GLY A 141 SER A 142 SITE 3 AC1 12 THR A 143 GLU A 193 HOH A1017 HOH A1036 CRYST1 95.254 61.635 48.751 90.00 90.00 90.00 P 21 21 2 4 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 0.010498 0.000000 0.000000 0.00000 SCALE2 0.000000 0.016225 0.000000 0.00000 SCALE3 0.000000 0.000000 0.020512 0.00000