HEADER HYDROLASE 27-AUG-98 1BR6 TITLE RICIN A CHAIN (RECOMBINANT) COMPLEX WITH PTEROIC ACID COMPND MOL_ID: 1; COMPND 2 MOLECULE: PROTEIN (RICIN); COMPND 3 CHAIN: A; COMPND 4 SYNONYM: RTA; 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 ORGAN: SEED; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS GLYCOSIDASE, HYDROLASE EXPDTA X-RAY DIFFRACTION AUTHOR T.HOLLIS,X.YAN,M.SVINTH,P.DAY,A.F.MONZINGO,G.W.A.MILNE,J.D.ROBERTUS REVDAT 6 09-AUG-23 1BR6 1 REMARK SEQADV REVDAT 5 04-OCT-17 1BR6 1 REMARK REVDAT 4 24-FEB-09 1BR6 1 VERSN REVDAT 3 01-APR-03 1BR6 1 JRNL REVDAT 2 29-DEC-99 1BR6 4 HEADER COMPND REMARK JRNL REVDAT 2 2 4 ATOM SOURCE SEQRES REVDAT 1 02-SEP-98 1BR6 0 JRNL AUTH X.YAN,T.HOLLIS,M.SVINTH,P.DAY,A.F.MONZINGO,G.W.MILNE, JRNL AUTH 2 J.D.ROBERTUS JRNL TITL STRUCTURE-BASED IDENTIFICATION OF A RICIN INHIBITOR. JRNL REF J.MOL.BIOL. V. 266 1043 1997 JRNL REFN ISSN 0022-2836 JRNL PMID 9086280 JRNL DOI 10.1006/JMBI.1996.0865 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH D.MLSNA,A.F.MONZINGO,B.J.KATZIN,S.ERNST,J.D.ROBERTUS REMARK 1 TITL THE STRUCTURE OF RECOMBINANT RICIN A CHAIN AT 2.3 ANGSTROMS REMARK 1 REF PROTEIN SCI. V. 2 429 1993 REMARK 1 REFN ISSN 0961-8368 REMARK 1 REFERENCE 2 REMARK 1 AUTH B.J.KATZIN,E.J.COLLINS,J.D.ROBERTUS REMARK 1 TITL STRUCTURE OF RICIN A-CHAIN AT 2.5 ANGSTROMS REMARK 1 REF PROTEINS V. 10 251 1991 REMARK 1 REFN ISSN 0887-3585 REMARK 2 REMARK 2 RESOLUTION. 2.30 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.1 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.30 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 5.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 0.000 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 99.4 REMARK 3 NUMBER OF REFLECTIONS : 9321 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING SET) : 0.180 REMARK 3 FREE R VALUE : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 8 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 2.30 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.39 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 95.40 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 1111 REMARK 3 BIN R VALUE (WORKING SET) : 0.2240 REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2122 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 23 REMARK 3 SOLVENT ATOMS : 41 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : NULL REMARK 3 B22 (A**2) : NULL REMARK 3 B33 (A**2) : NULL REMARK 3 B12 (A**2) : NULL REMARK 3 B13 (A**2) : NULL REMARK 3 B23 (A**2) : NULL REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM SIGMAA (A) : NULL REMARK 3 LOW RESOLUTION CUTOFF (A) : 0.00 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.014 REMARK 3 BOND ANGLES (DEGREES) : 3.243 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 26.27 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.431 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) : 1.500 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 1.500 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 2.000 ; 1.500 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 2.000 ; 2.000 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 : PARAM19X.PRO REMARK 3 PARAMETER FILE 2 : PARAM.WAT REMARK 3 PARAMETER FILE 3 : PARAM.PT1 REMARK 3 PARAMETER FILE 4 : NULL REMARK 3 TOPOLOGY FILE 1 : TOPH19X.PRO REMARK 3 TOPOLOGY FILE 2 : TOPH.WAT REMARK 3 TOPOLOGY FILE 3 : TOPH.PT1 REMARK 3 TOPOLOGY FILE 4 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1BR6 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB. REMARK 100 THE DEPOSITION ID IS D_1000008217. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 15-AUG-95 REMARK 200 TEMPERATURE (KELVIN) : 298 REMARK 200 PH : 8.9 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : ROTATING ANODE REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : RIGAKU RU200 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : GRAPHITE REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : AREA DETECTOR REMARK 200 DETECTOR MANUFACTURER : SDMS REMARK 200 INTENSITY-INTEGRATION SOFTWARE : UCSD-SYSTEM REMARK 200 DATA SCALING SOFTWARE : UCSD-SYSTEM REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 10999 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.230 REMARK 200 RESOLUTION RANGE LOW (A) : 20.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 96.0 REMARK 200 DATA REDUNDANCY : 6.200 REMARK 200 R MERGE (I) : 0.06120 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 11.3000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.23 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.40 REMARK 200 COMPLETENESS FOR SHELL (%) : 78.0 REMARK 200 DATA REDUNDANCY IN SHELL : 2.90 REMARK 200 R MERGE FOR SHELL (I) : 0.13500 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 4.200 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: X-PLOR REMARK 200 STARTING MODEL: PDB ENTRY 1RTC REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 37.30 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.25 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PH 8.9 REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,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 32.18300 REMARK 290 SMTRY3 2 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: MONOMERIC 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 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS REMARK 500 REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3) REMARK 500 REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999 REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996 REMARK 500 REMARK 500 M RES CSSEQI ATM1 RES CSSEQI ATM2 DEVIATION REMARK 500 HIS A 40 NE2 HIS A 40 CD2 -0.071 REMARK 500 HIS A 65 NE2 HIS A 65 CD2 -0.070 REMARK 500 HIS A 94 NE2 HIS A 94 CD2 -0.076 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND ANGLES REMARK 500 REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1) REMARK 500 REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999 REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996 REMARK 500 REMARK 500 M RES CSSEQI ATM1 ATM2 ATM3 REMARK 500 ARG A 26 NE - CZ - NH1 ANGL. DEV. = 4.9 DEGREES REMARK 500 ARG A 26 NE - CZ - NH2 ANGL. DEV. = -3.2 DEGREES REMARK 500 ARG A 29 NE - CZ - NH1 ANGL. DEV. = 5.9 DEGREES REMARK 500 ARG A 29 NE - CZ - NH2 ANGL. DEV. = -3.9 DEGREES REMARK 500 ASP A 37 N - CA - C ANGL. DEV. = -17.3 DEGREES REMARK 500 ASN A 64 N - CA - CB ANGL. DEV. = -15.0 DEGREES REMARK 500 ARG A 134 NE - CZ - NH1 ANGL. DEV. = 3.4 DEGREES REMARK 500 ARG A 134 NE - CZ - NH2 ANGL. DEV. = -4.7 DEGREES REMARK 500 THR A 159 CA - CB - CG2 ANGL. DEV. = 11.3 DEGREES REMARK 500 ARG A 189 NE - CZ - NH1 ANGL. DEV. = 4.1 DEGREES REMARK 500 ARG A 193 NE - CZ - NH1 ANGL. DEV. = 4.0 DEGREES REMARK 500 TRP A 211 CD1 - CG - CD2 ANGL. DEV. = 5.5 DEGREES REMARK 500 TRP A 211 CE2 - CD2 - CG ANGL. DEV. = -5.3 DEGREES REMARK 500 ARG A 235 NE - CZ - NH2 ANGL. DEV. = -3.1 DEGREES REMARK 500 TYR A 243 CA - CB - CG ANGL. DEV. = 16.2 DEGREES REMARK 500 TYR A 243 CB - CG - CD2 ANGL. DEV. = -5.0 DEGREES REMARK 500 TYR A 243 CB - CG - CD1 ANGL. DEV. = 3.9 DEGREES 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 ILE A 1 -165.54 -115.25 REMARK 500 LYS A 4 121.21 76.74 REMARK 500 ALA A 14 98.60 -69.06 REMARK 500 ASN A 113 102.45 63.93 REMARK 500 THR A 159 -167.69 33.03 REMARK 500 GLN A 160 116.12 111.89 REMARK 500 GLN A 223 -77.43 60.82 REMARK 500 SER A 264 -79.75 -81.03 REMARK 500 SER A 265 -52.91 59.32 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: PLANAR GROUPS REMARK 500 REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS REMARK 500 AN RMSD GREATER THAN THIS VALUE REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI RMS TYPE REMARK 500 TYR A 152 0.08 SIDE CHAIN 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 PT1 A 301 DBREF 1BR6 A 0 267 UNP P02879 RICI_RICCO 35 302 SEQADV 1BR6 MET A 0 UNP P02879 ASN 35 CONFLICT SEQRES 1 A 268 MET ILE PHE PRO LYS GLN TYR PRO ILE ILE ASN PHE THR SEQRES 2 A 268 THR ALA GLY ALA THR VAL GLN SER TYR THR ASN PHE ILE SEQRES 3 A 268 ARG ALA VAL ARG GLY ARG LEU THR THR GLY ALA ASP VAL SEQRES 4 A 268 ARG HIS GLU ILE PRO VAL LEU PRO ASN ARG VAL GLY LEU SEQRES 5 A 268 PRO ILE ASN GLN ARG PHE ILE LEU VAL GLU LEU SER ASN SEQRES 6 A 268 HIS ALA GLU LEU SER VAL THR LEU ALA LEU ASP VAL THR SEQRES 7 A 268 ASN ALA TYR VAL VAL GLY TYR ARG ALA GLY ASN SER ALA SEQRES 8 A 268 TYR PHE PHE HIS PRO ASP ASN GLN GLU ASP ALA GLU ALA SEQRES 9 A 268 ILE THR HIS LEU PHE THR ASP VAL GLN ASN ARG TYR THR SEQRES 10 A 268 PHE ALA PHE GLY GLY ASN TYR ASP ARG LEU GLU GLN LEU SEQRES 11 A 268 ALA GLY ASN LEU ARG GLU ASN ILE GLU LEU GLY ASN GLY SEQRES 12 A 268 PRO LEU GLU GLU ALA ILE SER ALA LEU TYR TYR TYR SER SEQRES 13 A 268 THR GLY GLY THR GLN LEU PRO THR LEU ALA ARG SER PHE SEQRES 14 A 268 ILE ILE CYS ILE GLN MET ILE SER GLU ALA ALA ARG PHE SEQRES 15 A 268 GLN TYR ILE GLU GLY GLU MET ARG THR ARG ILE ARG TYR SEQRES 16 A 268 ASN ARG ARG SER ALA PRO ASP PRO SER VAL ILE THR LEU SEQRES 17 A 268 GLU ASN SER TRP GLY ARG LEU SER THR ALA ILE GLN GLU SEQRES 18 A 268 SER ASN GLN GLY ALA PHE ALA SER PRO ILE GLN LEU GLN SEQRES 19 A 268 ARG ARG ASN GLY SER LYS PHE SER VAL TYR ASP VAL SER SEQRES 20 A 268 ILE LEU ILE PRO ILE ILE ALA LEU MET VAL TYR ARG CYS SEQRES 21 A 268 ALA PRO PRO PRO SER SER GLN PHE HET PT1 A 301 23 HETNAM PT1 PTEROIC ACID FORMUL 2 PT1 C14 H12 N6 O3 FORMUL 3 HOH *41(H2 O) HELIX 1 1 THR A 17 THR A 33 1 17 HELIX 2 2 PRO A 52 GLN A 55 5 4 HELIX 3 3 ASN A 97 THR A 105 1 9 HELIX 4 4 ASN A 122 GLY A 131 1 10 HELIX 5 5 LEU A 133 ILE A 137 5 5 HELIX 6 6 GLY A 140 SER A 155 1 16 HELIX 7 7 GLN A 160 SER A 176 1 17 HELIX 8 8 ILE A 175 PHE A 181 1 7 HELIX 9 9 PHE A 181 TYR A 194 1 14 HELIX 10 10 ASP A 201 SER A 221 1 21 HELIX 11 11 SER A 246 ILE A 249 5 4 SHEET 1 1 6 PRO A 7 THR A 13 0 SHEET 2 1 6 LEU A 59 ASN A 64 1 N LEU A 59 O PRO A 7 SHEET 3 1 6 LEU A 68 ALA A 73 -1 O LEU A 68 N ASN A 64 SHEET 4 1 6 VAL A 82 ALA A 86 -1 O GLY A 83 N ALA A 73 SHEET 5 1 6 SER A 89 PHE A 93 -1 N SER A 89 O ALA A 86 SHEET 6 1 6 TYR A 115 PHE A 117 1 N TYR A 115 O ALA A 90 SHEET 1 2 2 ILE A 230 ARG A 234 0 SHEET 2 2 2 GLY A 237 VAL A 242 -1 O VAL A 242 N ILE A 230 SITE 1 AC1 13 ASN A 78 ALA A 79 TYR A 80 VAL A 81 SITE 2 AC1 13 PHE A 93 GLY A 121 ASN A 122 TYR A 123 SITE 3 AC1 13 ILE A 172 SER A 176 GLU A 177 ARG A 180 SITE 4 AC1 13 GLU A 208 CRYST1 38.992 64.366 49.442 90.00 107.98 90.00 P 1 21 1 2 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 0.025646 0.000000 0.008323 0.00000 SCALE2 0.000000 0.015536 0.000000 0.00000 SCALE3 0.000000 0.000000 0.021264 0.00000