HEADER OXIDOREDUCTASE 29-JUN-95 1DDR TITLE MOLECULE: DIHYDROFOLATE REDUCTASE (E.C.1.5.1.3) COMPLEXED WITH TITLE 2 METHOTREXATE AND UREA COMPND MOL_ID: 1; COMPND 2 MOLECULE: DIHYDROFOLATE REDUCTASE; COMPND 3 CHAIN: A, B; COMPND 4 EC: 1.5.1.3 SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; SOURCE 3 ORGANISM_TAXID: 37762; SOURCE 4 STRAIN: B KEYWDS OXIDO-REDUCTASE, OXIDOREDUCTASE EXPDTA X-RAY DIFFRACTION AUTHOR H.P.YENNAWAR,G.K.FARBER REVDAT 4 07-FEB-24 1DDR 1 KEYWDS REMARK LINK REVDAT 3 13-JUL-11 1DDR 1 VERSN REVDAT 2 24-FEB-09 1DDR 1 VERSN REVDAT 1 15-OCT-95 1DDR 0 JRNL AUTH J.DUNBAR,H.P.YENNAWAR,S.BANERJEE,J.LUO,G.K.FARBER JRNL TITL THE EFFECT OF DENATURANTS ON PROTEIN STRUCTURE. JRNL REF PROTEIN SCI. V. 6 1727 1997 JRNL REFN ISSN 0961-8368 JRNL PMID 9260285 REMARK 2 REMARK 2 RESOLUTION. 2.45 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) : 2.45 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 10.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 2.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 33.0 REMARK 3 NUMBER OF REFLECTIONS : 6948 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) : 0.156 REMARK 3 FREE R VALUE : 0.171 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 : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : NULL REMARK 3 BIN RESOLUTION RANGE LOW (A) : NULL REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL 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 : 2503 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 89 REMARK 3 SOLVENT ATOMS : 179 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 11.00 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) : NULL 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) : 0.013 REMARK 3 BOND ANGLES (DEGREES) : 2.067 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 26.15 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.770 REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : NULL 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 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: NULL REMARK 4 REMARK 4 1DDR COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL. REMARK 100 THE DEPOSITION ID IS D_1000172747. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 11-JAN-94 REMARK 200 TEMPERATURE (KELVIN) : NULL REMARK 200 PH : NULL REMARK 200 NUMBER OF CRYSTALS USED : NULL REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : NULL REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.54 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : DIFFRACTOMETER REMARK 200 DETECTOR MANUFACTURER : RIGAKU AFC-6R REMARK 200 INTENSITY-INTEGRATION SOFTWARE : TEXSAN REMARK 200 DATA SCALING SOFTWARE : NULL REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 15448 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.450 REMARK 200 RESOLUTION RANGE LOW (A) : 30.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 200 DATA REDUNDANCY : 1.000 REMARK 200 R MERGE (I) : 0.11000 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : NULL REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : NULL REMARK 200 COMPLETENESS FOR SHELL (%) : NULL REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: X-PLOR 3.1 REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 52.10 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.57 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 61 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z+1/3 REMARK 290 3555 -X+Y,-X,Z+2/3 REMARK 290 4555 -X,-Y,Z+1/2 REMARK 290 5555 Y,-X+Y,Z+5/6 REMARK 290 6555 X-Y,X,Z+1/6 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 -0.500021 -0.865988 0.000000 0.00000 REMARK 290 SMTRY2 2 0.866063 -0.499979 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 24.62867 REMARK 290 SMTRY1 3 -0.499979 0.865988 0.000000 0.00000 REMARK 290 SMTRY2 3 -0.866063 -0.500021 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 49.25733 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 36.94300 REMARK 290 SMTRY1 5 0.500021 0.865988 0.000000 0.00000 REMARK 290 SMTRY2 5 -0.866063 0.499979 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 61.57167 REMARK 290 SMTRY1 6 0.499979 -0.865988 0.000000 0.00000 REMARK 290 SMTRY2 6 0.866063 0.500021 0.000000 0.00000 REMARK 290 SMTRY3 6 0.000000 0.000000 1.000000 12.31433 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: 3900 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 15630 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -31.0 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 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 PRO A 66 CB CG CD REMARK 470 THR A 68 OG1 CG2 REMARK 470 LYS A 76 CG CD CE NZ REMARK 470 LYS A 106 CG CD CE NZ REMARK 470 GLU A 129 CG CD OE1 OE2 REMARK 470 ASP A 131 CG OD1 OD2 REMARK 470 ARG A 159 CG CD NE CZ NH1 NH2 REMARK 470 GLU B 129 CG CD OE1 OE2 REMARK 470 ASP B 131 CG OD1 OD2 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 PRO A 21 C - N - CA ANGL. DEV. = 10.4 DEGREES REMARK 500 PRO A 25 C - N - CA ANGL. DEV. = 11.3 DEGREES REMARK 500 LEU B 4 CA - CB - CG ANGL. DEV. = 14.7 DEGREES REMARK 500 PRO B 130 C - N - CA ANGL. DEV. = 9.7 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 MET A 16 -32.80 -139.65 REMARK 500 GLU A 17 -72.22 -161.57 REMARK 500 PRO A 21 64.68 -67.32 REMARK 500 PRO A 66 117.38 -22.96 REMARK 500 THR A 68 36.46 -79.36 REMARK 500 ARG A 71 -29.22 -154.94 REMARK 500 GLN A 108 -8.94 -141.51 REMARK 500 ASP A 116 33.44 -84.74 REMARK 500 ASP A 132 -7.54 -160.98 REMARK 500 VAL A 136 -77.33 -109.25 REMARK 500 SER A 138 111.23 -164.95 REMARK 500 ALA A 145 3.37 -63.03 REMARK 500 ARG B 12 18.20 59.01 REMARK 500 ASN B 18 -168.42 -115.21 REMARK 500 TRP B 22 157.41 178.83 REMARK 500 ASN B 37 31.25 70.82 REMARK 500 SER B 63 128.64 -179.74 REMARK 500 ASP B 127 104.66 -57.10 REMARK 500 PRO B 130 5.35 -66.13 REMARK 500 ASP B 131 14.79 -144.86 REMARK 500 REMARK 500 REMARK: NULL REMARK 620 REMARK 620 METAL COORDINATION REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE): REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA B 203 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASN A 18 OD1 REMARK 620 2 SER B 135 O 106.0 REMARK 620 3 ALA B 143 O 83.1 150.9 REMARK 620 4 HOH B 808 O 148.0 54.7 126.8 REMARK 620 N 1 2 3 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL A 201 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL B 202 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA B 203 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MTX A 200 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MTX B 200 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE URE A 211 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE URE A 212 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC8 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE URE A 213 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC9 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE URE B 214 REMARK 800 REMARK 800 SITE_IDENTIFIER: BC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE URE B 215 DBREF 1DDR A 1 159 UNP P0ABQ4 DYR_ECOLI 1 159 DBREF 1DDR B 1 159 UNP P0ABQ4 DYR_ECOLI 1 159 SEQRES 1 A 159 MET ILE SER LEU ILE ALA ALA LEU ALA VAL ASP ARG VAL SEQRES 2 A 159 ILE GLY MET GLU ASN ALA MET PRO TRP ASN LEU PRO ALA SEQRES 3 A 159 ASP LEU ALA TRP PHE LYS ARG ASN THR LEU ASN LYS PRO SEQRES 4 A 159 VAL ILE MET GLY ARG HIS THR TRP GLU SER ILE GLY ARG SEQRES 5 A 159 PRO LEU PRO GLY ARG LYS ASN ILE ILE LEU SER SER GLN SEQRES 6 A 159 PRO GLY THR ASP ASP ARG VAL THR TRP VAL LYS SER VAL SEQRES 7 A 159 ASP GLU ALA ILE ALA ALA CYS GLY ASP VAL PRO GLU ILE SEQRES 8 A 159 MET VAL ILE GLY GLY GLY ARG VAL TYR GLU GLN PHE LEU SEQRES 9 A 159 PRO LYS ALA GLN LYS LEU TYR LEU THR HIS ILE ASP ALA SEQRES 10 A 159 GLU VAL GLU GLY ASP THR HIS PHE PRO ASP TYR GLU PRO SEQRES 11 A 159 ASP ASP TRP GLU SER VAL PHE SER GLU PHE HIS ASP ALA SEQRES 12 A 159 ASP ALA GLN ASN SER HIS SER TYR CYS PHE GLU ILE LEU SEQRES 13 A 159 GLU ARG ARG SEQRES 1 B 159 MET ILE SER LEU ILE ALA ALA LEU ALA VAL ASP ARG VAL SEQRES 2 B 159 ILE GLY MET GLU ASN ALA MET PRO TRP ASN LEU PRO ALA SEQRES 3 B 159 ASP LEU ALA TRP PHE LYS ARG ASN THR LEU ASN LYS PRO SEQRES 4 B 159 VAL ILE MET GLY ARG HIS THR TRP GLU SER ILE GLY ARG SEQRES 5 B 159 PRO LEU PRO GLY ARG LYS ASN ILE ILE LEU SER SER GLN SEQRES 6 B 159 PRO GLY THR ASP ASP ARG VAL THR TRP VAL LYS SER VAL SEQRES 7 B 159 ASP GLU ALA ILE ALA ALA CYS GLY ASP VAL PRO GLU ILE SEQRES 8 B 159 MET VAL ILE GLY GLY GLY ARG VAL TYR GLU GLN PHE LEU SEQRES 9 B 159 PRO LYS ALA GLN LYS LEU TYR LEU THR HIS ILE ASP ALA SEQRES 10 B 159 GLU VAL GLU GLY ASP THR HIS PHE PRO ASP TYR GLU PRO SEQRES 11 B 159 ASP ASP TRP GLU SER VAL PHE SER GLU PHE HIS ASP ALA SEQRES 12 B 159 ASP ALA GLN ASN SER HIS SER TYR CYS PHE GLU ILE LEU SEQRES 13 B 159 GLU ARG ARG HET CL A 201 1 HET MTX A 200 33 HET URE A 211 4 HET URE A 212 4 HET URE A 213 4 HET CL B 202 1 HET CA B 203 1 HET MTX B 200 33 HET URE B 214 4 HET URE B 215 4 HETNAM CL CHLORIDE ION HETNAM MTX METHOTREXATE HETNAM URE UREA HETNAM CA CALCIUM ION FORMUL 3 CL 2(CL 1-) FORMUL 4 MTX 2(C20 H22 N8 O5) FORMUL 5 URE 5(C H4 N2 O) FORMUL 9 CA CA 2+ FORMUL 13 HOH *179(H2 O) HELIX 1 1 VAL A 10 ARG A 12 5 3 HELIX 2 2 PRO A 25 THR A 35 1 11 HELIX 3 3 ARG A 44 ILE A 50 1 7 HELIX 4 4 VAL A 78 CYS A 85 1 8 HELIX 5 5 GLY A 97 LYS A 106 1 10 HELIX 6 6 VAL B 10 ARG B 12 5 3 HELIX 7 7 PRO B 25 THR B 35 1 11 HELIX 8 8 ARG B 44 ILE B 50 1 7 HELIX 9 9 VAL B 78 CYS B 85 1 8 HELIX 10 10 GLY B 97 LYS B 106 1 10 SHEET 1 A 8 TRP A 133 SER A 135 0 SHEET 2 A 8 TYR A 151 ARG A 158 -1 N GLU A 157 O GLU A 134 SHEET 3 A 8 ALA A 107 ILE A 115 -1 N HIS A 114 O CYS A 152 SHEET 4 A 8 ILE A 2 ILE A 5 1 N ILE A 2 O GLN A 108 SHEET 5 A 8 ILE A 91 GLY A 95 1 N ILE A 91 O SER A 3 SHEET 6 A 8 PRO A 39 GLY A 43 1 N PRO A 39 O MET A 92 SHEET 7 A 8 LYS A 58 LEU A 62 1 N LYS A 58 O VAL A 40 SHEET 8 A 8 THR A 73 VAL A 75 1 N THR A 73 O ILE A 61 SHEET 1 B 2 SER A 138 HIS A 141 0 SHEET 2 B 2 TYR A 151 GLU A 154 -1 N PHE A 153 O GLU A 139 SHEET 1 C 8 TRP B 133 HIS B 141 0 SHEET 2 C 8 TYR B 151 ARG B 158 -1 N GLU B 157 O GLU B 134 SHEET 3 C 8 ALA B 107 ILE B 115 -1 N HIS B 114 O CYS B 152 SHEET 4 C 8 ILE B 2 LEU B 8 1 N ILE B 2 O GLN B 108 SHEET 5 C 8 ILE B 91 GLY B 95 1 N ILE B 91 O SER B 3 SHEET 6 C 8 PRO B 39 GLY B 43 1 N PRO B 39 O MET B 92 SHEET 7 C 8 LYS B 58 LEU B 62 1 N LYS B 58 O VAL B 40 SHEET 8 C 8 THR B 73 VAL B 75 1 N THR B 73 O ILE B 61 LINK OD1 ASN A 18 CA CA B 203 2665 1555 2.20 LINK O SER B 135 CA CA B 203 1555 1555 3.10 LINK O ALA B 143 CA CA B 203 2665 1555 2.15 LINK CA CA B 203 O HOH B 808 1555 1555 2.18 CISPEP 1 GLY A 95 GLY A 96 0 1.77 CISPEP 2 GLY B 95 GLY B 96 0 0.79 SITE 1 AC1 3 GLY A 43 ARG A 44 HIS A 45 SITE 1 AC2 4 GLY B 43 ARG B 44 HIS B 45 THR B 46 SITE 1 AC3 4 ASN A 18 SER B 135 ALA B 143 HOH B 808 SITE 1 AC4 12 ILE A 5 ALA A 6 ASP A 27 PHE A 31 SITE 2 AC4 12 LYS A 32 THR A 46 ARG A 52 LEU A 54 SITE 3 AC4 12 ARG A 57 ILE A 94 TYR A 100 THR A 113 SITE 1 AC5 14 ILE B 5 ALA B 6 ASP B 27 LEU B 28 SITE 2 AC5 14 TRP B 30 PHE B 31 LYS B 32 ILE B 50 SITE 3 AC5 14 ARG B 52 LEU B 54 ARG B 57 ILE B 94 SITE 4 AC5 14 TYR B 100 THR B 113 SITE 1 AC6 6 ARG A 44 SER A 63 GLN A 65 HOH A 800 SITE 2 AC6 6 GLU B 139 PHE B 140 SITE 1 AC7 1 ARG A 52 SITE 1 AC8 1 LYS A 76 SITE 1 AC9 5 GLY B 56 ASP B 122 THR B 123 HIS B 124 SITE 2 AC9 5 HOH B 803 SITE 1 BC1 6 ARG B 57 LYS B 58 ASN B 59 ARG B 71 SITE 2 BC1 6 VAL B 72 ARG B 98 CRYST1 93.181 93.185 73.886 90.00 90.00 120.00 P 61 12 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 0.010732 0.006196 0.000000 0.00000 SCALE2 0.000000 0.012391 0.000000 0.00000 SCALE3 0.000000 0.000000 0.013534 0.00000