HEADER TRANSPORT PROTEIN/AGONIST 07-MAY-12 4F22 TITLE KAINATE BOUND TO THE K660A MUTANT OF THE LIGAND BINDING DOMAIN OF TITLE 2 GLUA3 COMPND MOL_ID: 1; COMPND 2 MOLECULE: GLUTAMATE RECEPTOR 3; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: GLUR-3, AMPA-SELECTIVE GLUTAMATE RECEPTOR 3, GLUR-C, GLUR- COMPND 5 K3, GLUTAMATE RECEPTOR IONOTROPIC, AMPA 3, GLUA3; COMPND 6 ENGINEERED: YES; COMPND 7 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS; SOURCE 3 ORGANISM_COMMON: RAT; SOURCE 4 ORGANISM_TAXID: 10116; SOURCE 5 GENE: GLUR3, GRIA3, GRIA3; GLUA3; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: ORIGAMI B (DE3); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET-22B(+) KEYWDS GLUTAMATE RECEPTOR, GLUA3, GLUR3, AMPA RECEPTOR, S1S2, LBD, KEYWDS 2 NEUROTRANSMITTER RECEPTOR, KAINATE, TRANSPORT PROTEIN, TRANSPORT KEYWDS 3 PROTEIN-AGONIST COMPLEX EXPDTA X-RAY DIFFRACTION AUTHOR A.H.AHMED,R.E.OSWALD REVDAT 6 16-OCT-24 4F22 1 REMARK REVDAT 5 13-SEP-23 4F22 1 REMARK SEQADV REVDAT 4 16-AUG-17 4F22 1 SOURCE REMARK REVDAT 3 26-MAR-14 4F22 1 COMPND REVDAT 2 23-MAY-12 4F22 1 JRNL REVDAT 1 16-MAY-12 4F22 0 JRNL AUTH S.M.HOLLEY,A.H.AHMED,J.SRINIVASAN,S.E.MURTHY,G.A.WEILAND, JRNL AUTH 2 R.E.OSWALD,L.M.NOWAK JRNL TITL THE LOSS OF AN ELECTROSTATIC CONTACT UNIQUE TO AMPA RECEPTOR JRNL TITL 2 LIGAND BINDING DOMAIN 2 SLOWS CHANNEL ACTIVATION. JRNL REF BIOCHEMISTRY V. 51 4015 2012 JRNL REFN ISSN 0006-2960 JRNL PMID 22512472 JRNL DOI 10.1021/BI3001837 REMARK 2 REMARK 2 RESOLUTION. 2.06 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.5.0109 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) : 2.06 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 33.15 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : 98.4 REMARK 3 NUMBER OF REFLECTIONS : 19058 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) : 0.185 REMARK 3 R VALUE (WORKING SET) : 0.181 REMARK 3 FREE R VALUE : 0.244 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.100 REMARK 3 FREE R VALUE TEST SET COUNT : 1033 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) : 2.06 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.12 REMARK 3 REFLECTION IN BIN (WORKING SET) : 1233 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 89.38 REMARK 3 BIN R VALUE (WORKING SET) : 0.1920 REMARK 3 BIN FREE R VALUE SET COUNT : 63 REMARK 3 BIN FREE R VALUE : 0.2270 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2028 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 16 REMARK 3 SOLVENT ATOMS : 235 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 22.34 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 0.04000 REMARK 3 B22 (A**2) : -0.06000 REMARK 3 B33 (A**2) : 0.02000 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): 0.189 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.181 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.124 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 4.508 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.953 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.923 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 2083 ; 0.022 ; 0.022 REMARK 3 BOND LENGTHS OTHERS (A): 1456 ; 0.001 ; 0.020 REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 2808 ; 1.897 ; 1.984 REMARK 3 BOND ANGLES OTHERS (DEGREES): 3561 ; 1.006 ; 3.000 REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 257 ; 6.315 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 82 ;30.580 ;24.024 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): 389 ;16.118 ;15.000 REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 11 ;23.983 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 312 ; 0.113 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 2264 ; 0.009 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): 407 ; 0.001 ; 0.020 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): 1283 ; 1.171 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): 531 ; 0.305 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 2069 ; 2.090 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 800 ; 3.099 ; 3.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 739 ; 5.112 ; 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: HYDROGENS HAVE BEEN ADDED IN THE RIDING REMARK 3 POSITIONS REMARK 4 REMARK 4 4F22 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 08-MAY-12. REMARK 100 THE DEPOSITION ID IS D_1000072356. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 05-DEC-10 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 6.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : CHESS REMARK 200 BEAMLINE : A1 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.977 REMARK 200 MONOCHROMATOR : RH COATED SI REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 210 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-3000 REMARK 200 DATA SCALING SOFTWARE : HKL-3000 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : NULL REMARK 200 RESOLUTION RANGE HIGH (A) : 2.060 REMARK 200 RESOLUTION RANGE LOW (A) : 50.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.7 REMARK 200 DATA REDUNDANCY : 5.100 REMARK 200 R MERGE (I) : 0.15700 REMARK 200 R SYM (I) : 0.15700 REMARK 200 FOR THE DATA SET : 11.1120 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.08 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.12 REMARK 200 COMPLETENESS FOR SHELL (%) : 100.0 REMARK 200 DATA REDUNDANCY IN SHELL : 4.50 REMARK 200 R MERGE FOR SHELL (I) : 0.31200 REMARK 200 R SYM FOR SHELL (I) : 0.31200 REMARK 200 FOR SHELL : 2.261 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: PHENIX REMARK 200 STARTING MODEL: 3DLN REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 55.47 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.76 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 14-15% PEG 8K, 0.1 M SODIUM REMARK 280 CACODYLATE, 0.1-0.15 M ZINC ACETATE, 0.25 M AMMONIUM SULFATE, PH REMARK 280 6.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 2 2 21 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,Z+1/2 REMARK 290 3555 -X,Y,-Z+1/2 REMARK 290 4555 X,-Y,-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 68.31950 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 68.31950 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 0.00000 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 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 0.00000 REMARK 350 BIOMT2 2 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 -68.31950 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 PRO A 15 30.28 -98.62 REMARK 500 ARG A 48 62.56 63.49 REMARK 500 LYS A 69 15.00 57.19 REMARK 500 PRO A 89 59.00 -67.51 REMARK 500 LYS A 104 152.61 -49.19 REMARK 500 LEU A 109 -164.79 -169.16 REMARK 500 LYS A 129 29.41 -74.12 REMARK 500 PRO A 167 -174.38 -69.42 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 301 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 302 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 4F1Y RELATED DB: PDB REMARK 900 RELATED ID: 4F29 RELATED DB: PDB REMARK 900 RELATED ID: 4F2O RELATED DB: PDB REMARK 900 RELATED ID: 4F2Q RELATED DB: PDB REMARK 900 RELATED ID: 4F31 RELATED DB: PDB REMARK 999 REMARK 999 SEQUENCE REMARK 999 RESIDUES 232,233, 242, AND 246 CORRESPOND TO AN ALTERNATIVELY REMARK 999 SPLICED VERSION OF THE PROTEIN, UNP P19492 DBREF 4F22 A 4 117 UNP P19492 GRIA3_RAT 417 530 DBREF 4F22 A 120 261 UNP P19492 GRIA3_RAT 658 799 SEQADV 4F22 GLY A 118 UNP P19492 LINKER SEQADV 4F22 THR A 119 UNP P19492 LINKER SEQADV 4F22 ALA A 144 UNP P19492 LYS 682 ENGINEERED MUTATION SEQADV 4F22 THR A 232 UNP P19492 ASN 770 SEE REMARK 999 SEQADV 4F22 PRO A 233 UNP P19492 ALA 771 SEE REMARK 999 SEQADV 4F22 SER A 242 UNP P19492 ASN 780 SEE REMARK 999 SEQADV 4F22 ILE A 246 UNP P19492 LEU 784 SEE REMARK 999 SEQRES 1 A 258 ARG THR ILE VAL VAL THR THR ILE LEU GLU SER PRO TYR SEQRES 2 A 258 VAL MET TYR LYS LYS ASN HIS GLU GLN LEU GLU GLY ASN SEQRES 3 A 258 GLU ARG TYR GLU GLY TYR CYS VAL ASP LEU ALA TYR GLU SEQRES 4 A 258 ILE ALA LYS HIS VAL ARG ILE LYS TYR LYS LEU SER ILE SEQRES 5 A 258 VAL GLY ASP GLY LYS TYR GLY ALA ARG ASP PRO GLU THR SEQRES 6 A 258 LYS ILE TRP ASN GLY MET VAL GLY GLU LEU VAL TYR GLY SEQRES 7 A 258 ARG ALA ASP ILE ALA VAL ALA PRO LEU THR ILE THR LEU SEQRES 8 A 258 VAL ARG GLU GLU VAL ILE ASP PHE SER LYS PRO PHE MET SEQRES 9 A 258 SER LEU GLY ILE SER ILE MET ILE LYS LYS GLY THR PRO SEQRES 10 A 258 ILE GLU SER ALA GLU ASP LEU ALA LYS GLN THR GLU ILE SEQRES 11 A 258 ALA TYR GLY THR LEU ASP SER GLY SER THR ALA GLU PHE SEQRES 12 A 258 PHE ARG ARG SER LYS ILE ALA VAL TYR GLU LYS MET TRP SEQRES 13 A 258 SER TYR MET LYS SER ALA GLU PRO SER VAL PHE THR LYS SEQRES 14 A 258 THR THR ALA ASP GLY VAL ALA ARG VAL ARG LYS SER LYS SEQRES 15 A 258 GLY LYS PHE ALA PHE LEU LEU GLU SER THR MET ASN GLU SEQRES 16 A 258 TYR ILE GLU GLN ARG LYS PRO CYS ASP THR MET LYS VAL SEQRES 17 A 258 GLY GLY ASN LEU ASP SER LYS GLY TYR GLY VAL ALA THR SEQRES 18 A 258 PRO LYS GLY SER ALA LEU GLY THR PRO VAL ASN LEU ALA SEQRES 19 A 258 VAL LEU LYS LEU SER GLU GLN GLY ILE LEU ASP LYS LEU SEQRES 20 A 258 LYS ASN LYS TRP TRP TYR ASP LYS GLY GLU CYS HET KAI A 301 15 HET ZN A 302 1 HETNAM KAI 3-(CARBOXYMETHYL)-4-ISOPROPENYLPROLINE HETNAM ZN ZINC ION HETSYN KAI KAINATE FORMUL 2 KAI C10 H15 N O4 FORMUL 3 ZN ZN 2+ FORMUL 4 HOH *235(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 ARG 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 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 SHEET 1 A 3 LYS A 50 ILE A 55 0 SHEET 2 A 3 THR A 5 THR A 10 1 N VAL A 8 O SER 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 TYR 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 PHE 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 MET A 114 O PHE A 190 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 2.06 LINK NE2 HIS A 23 ZN ZN A 302 1555 1555 2.08 CISPEP 1 SER A 14 PRO A 15 0 -4.93 CISPEP 2 GLU A 166 PRO A 167 0 -9.92 CISPEP 3 LYS A 204 PRO A 205 0 6.84 SITE 1 AC1 12 TYR A 61 PRO A 89 THR A 91 ARG A 96 SITE 2 AC1 12 GLY A 141 SER A 142 THR A 143 GLU A 193 SITE 3 AC1 12 HOH A 409 HOH A 410 HOH A 461 HOH A 537 SITE 1 AC2 2 HIS A 23 GLU A 24 CRYST1 47.657 49.028 136.639 90.00 90.00 90.00 P 2 2 21 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 0.020983 0.000000 0.000000 0.00000 SCALE2 0.000000 0.020397 0.000000 0.00000 SCALE3 0.000000 0.000000 0.007319 0.00000