HEADER HYDROLASE 03-JUN-22 7XZS TITLE CRYSTAL STRUCTURE OF RICIN A CHAIN BOUND WITH (2-AMINO-4-OXO-3,4- TITLE 2 DIHYDROPTERIDINE-7-CARBONYL)-L-TYROSINE COMPND MOL_ID: 1; COMPND 2 MOLECULE: RICIN A CHAIN; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: RRNA N-GLYCOSIDASE; COMPND 5 EC: 3.2.2.22; COMPND 6 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RICINUS COMMUNIS; SOURCE 3 ORGANISM_COMMON: CASTOR BEAN; SOURCE 4 ORGANISM_TAXID: 3988; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 6 EXPRESSION_SYSTEM_TAXID: 469008; SOURCE 7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 8 EXPRESSION_SYSTEM_PLASMID: PET28A KEYWDS HYDROLASE INHIBITOR, HYDROLASE EXPDTA X-RAY DIFFRACTION AUTHOR M.GOTO,S.HIGASHI,T.OHBA,R.KAWATA,K.NAGATSU,S.SUZUKI,R.SAITO REVDAT 2 29-NOV-23 7XZS 1 REMARK REVDAT 1 21-DEC-22 7XZS 0 JRNL AUTH M.GOTO,S.HIGASHI,T.OHBA,R.KAWATA,K.NAGATSU,S.SUZUKI, JRNL AUTH 2 E.V.ANSLYN,R.SAITO JRNL TITL CONFORMATIONAL CHANGE IN RICIN TOXIN A-CHAIN: A CRITICAL JRNL TITL 2 FACTOR FOR INHIBITOR BINDING TO THE SECONDARY POCKET. JRNL REF BIOCHEM.BIOPHYS.RES.COMMUN. V. 627 1 2022 JRNL REFN ESSN 1090-2104 JRNL PMID 35998389 JRNL DOI 10.1016/J.BBRC.2022.08.008 REMARK 2 REMARK 2 RESOLUTION. 1.50 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.8.0131 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) : 1.50 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 47.70 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 3 NUMBER OF REFLECTIONS : 50324 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) : 0.220 REMARK 3 R VALUE (WORKING SET) : 0.218 REMARK 3 FREE R VALUE : 0.243 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT : 2664 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) : 1.50 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.54 REMARK 3 REFLECTION IN BIN (WORKING SET) : 3689 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 100.0 REMARK 3 BIN R VALUE (WORKING SET) : 0.2740 REMARK 3 BIN FREE R VALUE SET COUNT : 171 REMARK 3 BIN FREE R VALUE : 0.2740 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2049 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 64 REMARK 3 SOLVENT ATOMS : 259 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 24.56 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 0.58000 REMARK 3 B22 (A**2) : 0.58000 REMARK 3 B33 (A**2) : -1.15000 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): 0.080 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.081 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.056 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 1.509 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.955 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.939 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 2170 ; 0.007 ; 0.019 REMARK 3 BOND LENGTHS OTHERS (A): NULL ; NULL ; NULL REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 2964 ; 1.145 ; 1.983 REMARK 3 BOND ANGLES OTHERS (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 264 ; 4.676 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 102 ;33.559 ;22.745 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): 318 ;13.315 ;15.000 REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 21 ;16.943 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 327 ; 0.079 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 1710 ; 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): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): NULL ; NULL ; NULL 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 : 1.20 REMARK 3 ION PROBE RADIUS : 0.80 REMARK 3 SHRINKAGE RADIUS : 0.80 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: U VALUES : REFINED INDIVIDUALLY REMARK 4 REMARK 4 7XZS COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 16-JUN-22. REMARK 100 THE DEPOSITION ID IS D_1300029987. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 29-NOV-19 REMARK 200 TEMPERATURE (KELVIN) : 95 REMARK 200 PH : 4.0 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : PHOTON FACTORY REMARK 200 BEAMLINE : BL-5A REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.0 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : PIXEL REMARK 200 DETECTOR MANUFACTURER : DECTRIS PILATUS 6M REMARK 200 INTENSITY-INTEGRATION SOFTWARE : XDS REMARK 200 DATA SCALING SOFTWARE : SCALA 3.3.22 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 53080 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.500 REMARK 200 RESOLUTION RANGE LOW (A) : 60.859 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 200 DATA REDUNDANCY : 12.60 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.04500 REMARK 200 FOR THE DATA SET : 30.3000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.50 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.58 REMARK 200 COMPLETENESS FOR SHELL (%) : 100.0 REMARK 200 DATA REDUNDANCY IN SHELL : 12.30 REMARK 200 R MERGE FOR SHELL (I) : 0.98800 REMARK 200 R SYM FOR SHELL (I) : 0.98800 REMARK 200 FOR SHELL : 0.800 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: 4HUO REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 52.64 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.60 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 2000, LITHIUM SULFATE, SODIUM REMARK 280 ACETATE, PH 4.0, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 296K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 41 21 2 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 -Y+1/2,X+1/2,Z+1/4 REMARK 290 4555 Y+1/2,-X+1/2,Z+3/4 REMARK 290 5555 -X+1/2,Y+1/2,-Z+1/4 REMARK 290 6555 X+1/2,-Y+1/2,-Z+3/4 REMARK 290 7555 Y,X,-Z REMARK 290 8555 -Y,-X,-Z+1/2 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 70.53000 REMARK 290 SMTRY1 3 0.000000 -1.000000 0.000000 33.73000 REMARK 290 SMTRY2 3 1.000000 0.000000 0.000000 33.73000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 35.26500 REMARK 290 SMTRY1 4 0.000000 1.000000 0.000000 33.73000 REMARK 290 SMTRY2 4 -1.000000 0.000000 0.000000 33.73000 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 105.79500 REMARK 290 SMTRY1 5 -1.000000 0.000000 0.000000 33.73000 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 33.73000 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 35.26500 REMARK 290 SMTRY1 6 1.000000 0.000000 0.000000 33.73000 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 33.73000 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 105.79500 REMARK 290 SMTRY1 7 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY2 7 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 8 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY2 8 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 8 0.000000 0.000000 -1.000000 70.53000 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: MONOMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 160 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 12290 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -12.0 KCAL/MOL 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 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 MET A -6 REMARK 465 HIS A -5 REMARK 465 HIS A -4 REMARK 465 HIS A -3 REMARK 465 HIS A -2 REMARK 465 HIS A -1 REMARK 465 HIS A 0 REMARK 465 ILE A 1 REMARK 465 PHE A 2 REMARK 465 PRO A 3 REMARK 465 LYS A 4 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 GLN A 5 CG CD OE1 NE2 REMARK 470 GLN A 98 CG CD OE1 NE2 REMARK 470 GLN A 112 CG CD OE1 NE2 REMARK 470 GLN A 160 CG CD OE1 NE2 REMARK 470 ARG A 235 CG CD NE CZ NH1 NH2 REMARK 470 LYS A 239 CG CD CE NZ REMARK 470 GLN A 266 CG CD OE1 NE2 DBREF 7XZS A 1 267 UNP P02879 RICI_RICCO 36 302 SEQADV 7XZS MET A -6 UNP P02879 INITIATING METHIONINE SEQADV 7XZS HIS A -5 UNP P02879 EXPRESSION TAG SEQADV 7XZS HIS A -4 UNP P02879 EXPRESSION TAG SEQADV 7XZS HIS A -3 UNP P02879 EXPRESSION TAG SEQADV 7XZS HIS A -2 UNP P02879 EXPRESSION TAG SEQADV 7XZS HIS A -1 UNP P02879 EXPRESSION TAG SEQADV 7XZS HIS A 0 UNP P02879 EXPRESSION TAG SEQRES 1 A 274 MET HIS HIS HIS HIS HIS HIS ILE PHE PRO LYS GLN TYR SEQRES 2 A 274 PRO ILE ILE ASN PHE THR THR ALA GLY ALA THR VAL GLN SEQRES 3 A 274 SER TYR THR ASN PHE ILE ARG ALA VAL ARG GLY ARG LEU SEQRES 4 A 274 THR THR GLY ALA ASP VAL ARG HIS GLU ILE PRO VAL LEU SEQRES 5 A 274 PRO ASN ARG VAL GLY LEU PRO ILE ASN GLN ARG PHE ILE SEQRES 6 A 274 LEU VAL GLU LEU SER ASN HIS ALA GLU LEU SER VAL THR SEQRES 7 A 274 LEU ALA LEU ASP VAL THR ASN ALA TYR VAL VAL GLY TYR SEQRES 8 A 274 ARG ALA GLY ASN SER ALA TYR PHE PHE HIS PRO ASP ASN SEQRES 9 A 274 GLN GLU ASP ALA GLU ALA ILE THR HIS LEU PHE THR ASP SEQRES 10 A 274 VAL GLN ASN ARG TYR THR PHE ALA PHE GLY GLY ASN TYR SEQRES 11 A 274 ASP ARG LEU GLU GLN LEU ALA GLY ASN LEU ARG GLU ASN SEQRES 12 A 274 ILE GLU LEU GLY ASN GLY PRO LEU GLU GLU ALA ILE SER SEQRES 13 A 274 ALA LEU TYR TYR TYR SER THR GLY GLY THR GLN LEU PRO SEQRES 14 A 274 THR LEU ALA ARG SER PHE ILE ILE CYS ILE GLN MET ILE SEQRES 15 A 274 SER GLU ALA ALA ARG PHE GLN TYR ILE GLU GLY GLU MET SEQRES 16 A 274 ARG THR ARG ILE ARG TYR ASN ARG ARG SER ALA PRO ASP SEQRES 17 A 274 PRO SER VAL ILE THR LEU GLU ASN SER TRP GLY ARG LEU SEQRES 18 A 274 SER THR ALA ILE GLN GLU SER ASN GLN GLY ALA PHE ALA SEQRES 19 A 274 SER PRO ILE GLN LEU GLN ARG ARG ASN GLY SER LYS PHE SEQRES 20 A 274 SER VAL TYR ASP VAL SER ILE LEU ILE PRO ILE ILE ALA SEQRES 21 A 274 LEU MET VAL TYR ARG CYS ALA PRO PRO PRO SER SER GLN SEQRES 22 A 274 PHE HET I8T A 501 27 HET I8T A 502 27 HET SO4 A 503 5 HET SO4 A 504 5 HETNAM I8T (2S)-2-[(2-AZANYL-4-OXIDANYLIDENE-3H-PTERIDIN-7-YL) HETNAM 2 I8T CARBONYLAMINO]-3-(4-HYDROXYPHENYL)PROPANOIC ACID HETNAM SO4 SULFATE ION HETSYN I8T (2-AMINO-4-OXO-3,4-DIHYDROPTERIDINE-7-CARBONYL)-L- HETSYN 2 I8T TYROSINE FORMUL 2 I8T 2(C16 H14 N6 O5) FORMUL 4 SO4 2(O4 S 2-) FORMUL 6 HOH *259(H2 O) HELIX 1 AA1 THR A 17 THR A 33 1 17 HELIX 2 AA2 PRO A 52 GLN A 55 5 4 HELIX 3 AA3 ASN A 97 THR A 105 1 9 HELIX 4 AA4 ASN A 122 GLY A 131 1 10 HELIX 5 AA5 LEU A 133 ILE A 137 5 5 HELIX 6 AA6 GLY A 140 TYR A 154 1 15 HELIX 7 AA7 SER A 155 GLY A 157 5 3 HELIX 8 AA8 GLN A 160 PHE A 181 1 22 HELIX 9 AA9 PHE A 181 ASN A 195 1 15 HELIX 10 AB1 ASP A 201 SER A 221 1 21 HELIX 11 AB2 SER A 246 ILE A 249 5 4 SHEET 1 AA1 6 ILE A 8 THR A 12 0 SHEET 2 AA1 6 PHE A 57 SER A 63 1 O LEU A 59 N ILE A 9 SHEET 3 AA1 6 SER A 69 ASP A 75 -1 O LEU A 72 N VAL A 60 SHEET 4 AA1 6 VAL A 81 ALA A 86 -1 O ARG A 85 N THR A 71 SHEET 5 AA1 6 SER A 89 PHE A 92 -1 O SER A 89 N ALA A 86 SHEET 6 AA1 6 ASN A 113 THR A 116 1 O ASN A 113 N ALA A 90 SHEET 1 AA2 2 VAL A 38 ARG A 39 0 SHEET 2 AA2 2 ILE A 42 PRO A 43 -1 O ILE A 42 N ARG A 39 SHEET 1 AA3 2 ALA A 225 GLN A 233 0 SHEET 2 AA3 2 LYS A 239 ASP A 244 -1 O PHE A 240 N LEU A 232 CRYST1 67.460 67.460 141.060 90.00 90.00 90.00 P 41 21 2 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 0.014824 0.000000 0.000000 0.00000 SCALE2 0.000000 0.014824 0.000000 0.00000 SCALE3 0.000000 0.000000 0.007089 0.00000