HEADER PYROPHOSPHORYLASE 21-JAN-00 1DY3 TITLE TERNARY COMPLEX OF 7,8-DIHYDRO-6-HYDROXYMETHYLPTERINPYROPHOSPHOKINASE TITLE 2 FROM ESCHERICHIA COLI WITH ATP AND A SUBSTRATE ANALOGUE. COMPND MOL_ID: 1; COMPND 2 MOLECULE: 2-AMINO-4-HYDROXY-6-HYDROXYMETHYLDIHYDROPTERIDINE COMPND 3 PYROPHOSPHOKINASE; COMPND 4 CHAIN: A; COMPND 5 SYNONYM: 6-HYDROXYMETHYL-7,8-DIHYDROPTERIN PYROPHOSPHOKINASE,PPPK,7, COMPND 6 8-DIHYDRO-6-HYDROXYMETHYLPTERIN-PYROPHOSPHOKINASE,HPPK; COMPND 7 EC: 2.7.6.3; COMPND 8 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; SOURCE 3 ORGANISM_TAXID: 562; SOURCE 4 GENE: FOLK, B0142, JW0138; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 EXPRESSION_SYSTEM_CELLULAR_LOCATION: CYTOPLASM; SOURCE 8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID KEYWDS PYROPHOSPHORYLASE, DE NOVO FOLATE BIOSYNTHESIS EXPDTA X-RAY DIFFRACTION AUTHOR D.K.STAMMERS,A.ACHARI,D.O.SOMERS,P.K.BRYANT,J.ROSEMOND,D.L.SCOTT, AUTHOR 2 J.N.CHAMPNESS REVDAT 4 08-MAY-24 1DY3 1 COMPND SOURCE REMARK DBREF REVDAT 4 2 1 LINK REVDAT 3 24-FEB-09 1DY3 1 VERSN REVDAT 2 20-SEP-00 1DY3 1 COMPND REVDAT 1 18-AUG-00 1DY3 0 JRNL AUTH D.K.STAMMERS,A.ACHARI,D.O.SOMERS,P.K.BRYANT,J.ROSEMOND, JRNL AUTH 2 D.L.SCOTT,J.N.CHAMPNESS JRNL TITL 2.0A X-RAY STRUCTURE OF THE TERNARY COMPLEX OF JRNL TITL 2 7,8-DIHYDRO-6-HYDROXYMETHYLPTERINPYROPHOSPHOKINASE FROM JRNL TITL 3 ESCHERICHIA COLI WITH ATP AND A SUBSTRATE ANALOGUE JRNL REF FEBS LETT. V. 456 49 1999 JRNL REFN ISSN 0014-5793 JRNL PMID 10452528 JRNL DOI 10.1016/S0014-5793(99)00860-1 REMARK 2 REMARK 2 RESOLUTION. 2.00 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC REMARK 3 AUTHORS : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER, REMARK 3 : NICHOLLS,WINN,LONG,VAGIN REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.00 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 10.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 94.9 REMARK 3 NUMBER OF REFLECTIONS : 10829 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 + TEST SET) : NULL REMARK 3 R VALUE (WORKING SET) : 0.165 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 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1267 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 56 REMARK 3 SOLVENT ATOMS : 141 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 15.30 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 19.70 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 OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): NULL REMARK 3 ESU BASED ON FREE R VALUE (A): NULL REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): NULL REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 DISTANCE RESTRAINTS. RMS SIGMA REMARK 3 BOND LENGTH (A) : 0.013 ; NULL REMARK 3 ANGLE DISTANCE (A) : 0.030 ; NULL REMARK 3 INTRAPLANAR 1-4 DISTANCE (A) : 0.027 ; NULL REMARK 3 H-BOND OR METAL COORDINATION (A) : NULL ; NULL REMARK 3 REMARK 3 PLANE RESTRAINT (A) : NULL ; NULL REMARK 3 CHIRAL-CENTER RESTRAINT (A**3) : NULL ; NULL REMARK 3 REMARK 3 NON-BONDED CONTACT RESTRAINTS. REMARK 3 SINGLE TORSION (A) : NULL ; NULL REMARK 3 MULTIPLE TORSION (A) : NULL ; NULL REMARK 3 H-BOND (X...Y) (A) : NULL ; NULL REMARK 3 H-BOND (X-H...Y) (A) : NULL ; NULL REMARK 3 REMARK 3 CONFORMATIONAL TORSION ANGLE RESTRAINTS. REMARK 3 SPECIFIED (DEGREES) : NULL ; NULL REMARK 3 PLANAR (DEGREES) : NULL ; NULL REMARK 3 STAGGERED (DEGREES) : NULL ; NULL REMARK 3 TRANSVERSE (DEGREES) : NULL ; 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 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1DY3 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 21-JAN-00. REMARK 100 THE DEPOSITION ID IS D_1290004524. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : 290.0 REMARK 200 PH : 5.60 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 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : NI FILTER REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : R-AXIS REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 10879 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.000 REMARK 200 RESOLUTION RANGE LOW (A) : 40.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 94.4 REMARK 200 DATA REDUNDANCY : 4.400 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.05000 REMARK 200 FOR THE DATA SET : 20.5000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.00 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.07 REMARK 200 COMPLETENESS FOR SHELL (%) : 92.8 REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.10200 REMARK 200 FOR SHELL : 10.60 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MIR REMARK 200 SOFTWARE USED: NULL REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 45.84 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.27 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PH 5.60 REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 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 5555 X+1/2,Y+1/2,Z REMARK 290 6555 -X+1/2,-Y+1/2,Z+1/2 REMARK 290 7555 -X+1/2,Y+1/2,-Z+1/2 REMARK 290 8555 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 57.74500 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 57.74500 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 SMTRY1 5 1.000000 0.000000 0.000000 20.48000 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 34.50500 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 6 -1.000000 0.000000 0.000000 20.48000 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 34.50500 REMARK 290 SMTRY3 6 0.000000 0.000000 1.000000 57.74500 REMARK 290 SMTRY1 7 -1.000000 0.000000 0.000000 20.48000 REMARK 290 SMTRY2 7 0.000000 1.000000 0.000000 34.50500 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 57.74500 REMARK 290 SMTRY1 8 1.000000 0.000000 0.000000 20.48000 REMARK 290 SMTRY2 8 0.000000 -1.000000 0.000000 34.50500 REMARK 290 SMTRY3 8 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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC REMARK 350 SOFTWARE USED: PQS 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 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 ASP A 27 CA - CB - CG ANGL. DEV. = 23.1 DEGREES REMARK 500 ARG A 75 NE - CZ - NH1 ANGL. DEV. = 3.1 DEGREES REMARK 500 ARG A 82 CD - NE - CZ ANGL. DEV. = 10.2 DEGREES REMARK 500 ARG A 84 NE - CZ - NH2 ANGL. DEV. = 4.1 DEGREES REMARK 500 ARG A 88 N - CA - C ANGL. DEV. = 19.5 DEGREES REMARK 500 ARG A 110 NE - CZ - NH2 ANGL. DEV. = 3.1 DEGREES REMARK 500 ARG A 144 CD - NE - CZ ANGL. DEV. = 34.0 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 ASN A 10 16.32 -140.87 REMARK 500 SER A 13 79.30 59.65 REMARK 500 TRP A 89 41.03 -100.98 REMARK 500 ALA A 132 69.68 -151.39 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 MG A 202 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 95 OD2 REMARK 620 2 ASP A 97 OD2 99.1 REMARK 620 3 ATP A 200 O1G 163.6 88.6 REMARK 620 4 ATP A 200 O2B 87.2 101.0 77.0 REMARK 620 5 87Y A 201 O16 98.9 160.3 76.2 87.8 REMARK 620 6 HOH A2141 O 88.1 104.1 104.2 154.9 68.6 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 MG A 203 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 95 OD1 REMARK 620 2 ASP A 97 OD1 92.9 REMARK 620 3 ATP A 200 O2B 86.8 105.1 REMARK 620 4 ATP A 200 O1A 87.7 176.6 78.2 REMARK 620 5 HOH A2068 O 89.2 88.4 166.0 88.3 REMARK 620 6 HOH A2136 O 169.6 92.7 83.3 87.2 99.7 REMARK 620 N 1 2 3 4 5 REMARK 700 REMARK 700 SHEET REMARK 700 DETERMINATION METHOD: REMARK 700 THERE IS A BIFURCATED SHEETS IN THIS STRUCTURE. REMARK 700 THIS IS REPRESENTED BY TWO SHEETS WHICH HAVE ONE OR MORE REMARK 700 IDENTICAL STRANDS. REMARK 700 SHEETS A AND A1 REPRESENT ONE BIFURCATED SHEET. REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 202 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 203 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ATP A 200 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE 87Y A 201 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1HKA RELATED DB: PDB REMARK 900 6-HYDROXYMETHYL-7,8-DIHYDROPTERIN PYROPHOSPHOKINASE DBREF 1DY3 A 1 158 UNP P26281 HPPK_ECOLI 2 159 SEQRES 1 A 158 THR VAL ALA TYR ILE ALA ILE GLY SER ASN LEU ALA SER SEQRES 2 A 158 PRO LEU GLU GLN VAL ASN ALA ALA LEU LYS ALA LEU GLY SEQRES 3 A 158 ASP ILE PRO GLU SER HIS ILE LEU THR VAL SER SER PHE SEQRES 4 A 158 TYR ARG THR PRO PRO LEU GLY PRO GLN ASP GLN PRO ASP SEQRES 5 A 158 TYR LEU ASN ALA ALA VAL ALA LEU GLU THR SER LEU ALA SEQRES 6 A 158 PRO GLU GLU LEU LEU ASN HIS THR GLN ARG ILE GLU LEU SEQRES 7 A 158 GLN GLN GLY ARG VAL ARG LYS ALA GLU ARG TRP GLY PRO SEQRES 8 A 158 ARG THR LEU ASP LEU ASP ILE MET LEU PHE GLY ASN GLU SEQRES 9 A 158 VAL ILE ASN THR GLU ARG LEU THR VAL PRO HIS TYR ASP SEQRES 10 A 158 MET LYS ASN ARG GLY PHE MET LEU TRP PRO LEU PHE GLU SEQRES 11 A 158 ILE ALA PRO GLU LEU VAL PHE PRO ASP GLY GLU MET LEU SEQRES 12 A 158 ARG GLN ILE LEU HIS THR ARG ALA PHE ASP LYS LEU ASN SEQRES 13 A 158 LYS TRP HET ATP A 200 31 HET 87Y A 201 23 HET MG A 202 1 HET MG A 203 1 HETNAM ATP ADENOSINE-5'-TRIPHOSPHATE HETNAM 87Y 7,8-DIHYDRO-6-HYDROXYMETHYL-7-METHYL-7-[2-PHENYLETHYL]- HETNAM 2 87Y PTERIN HETNAM MG MAGNESIUM ION HETSYN 87Y 2-AMINO-6-HYDROXYMETHYL-7-METHYL-7-PHENETHYL-7,8- HETSYN 2 87Y DIHYDRO-3H-PTERIDIN-4-ONE; 7,8-DIHYDRO-6- HETSYN 3 87Y HYDROXYMETHYL-7-METHYL-7-[2-PHENYLETHYL]-PTERIN FORMUL 2 ATP C10 H16 N5 O13 P3 FORMUL 3 87Y C16 H19 N5 O2 FORMUL 4 MG 2(MG 2+) FORMUL 6 HOH *141(H2 O) HELIX 1 1 SER A 13 ASP A 27 1 15 HELIX 2 2 ALA A 65 GLN A 80 1 16 HELIX 3 3 ASP A 117 ASN A 120 5 4 HELIX 4 4 ARG A 121 ALA A 132 1 12 HELIX 5 5 MET A 142 ALA A 151 1 10 SHEET 1 A 4 SER A 31 VAL A 36 0 SHEET 2 A 4 TYR A 53 THR A 62 -1 O ALA A 59 N LEU A 34 SHEET 3 A 4 VAL A 2 SER A 9 -1 O ALA A 3 N LEU A 60 SHEET 4 A 4 ASP A 95 PHE A 101 -1 O ASP A 95 N GLY A 8 SHEET 1 A1 4 SER A 31 VAL A 36 0 SHEET 2 A1 4 TYR A 53 THR A 62 -1 O ALA A 59 N LEU A 34 SHEET 3 A1 4 TYR A 40 THR A 42 -1 O TYR A 40 N ASN A 55 SHEET 4 A1 4 ASN A 156 LYS A 157 -1 O ASN A 156 N ARG A 41 SHEET 1 B 2 ILE A 106 ASN A 107 0 SHEET 2 B 2 THR A 112 VAL A 113 -1 O VAL A 113 N ILE A 106 LINK OD2 ASP A 95 MG MG A 202 1555 1555 2.50 LINK OD1 ASP A 95 MG MG A 203 1555 1555 2.41 LINK OD2 ASP A 97 MG MG A 202 1555 1555 2.44 LINK OD1 ASP A 97 MG MG A 203 1555 1555 2.33 LINK O1G ATP A 200 MG MG A 202 1555 1555 2.60 LINK O2B ATP A 200 MG MG A 202 1555 1555 2.42 LINK O2B ATP A 200 MG MG A 203 1555 1555 2.36 LINK O1A ATP A 200 MG MG A 203 1555 1555 2.45 LINK O16 87Y A 201 MG MG A 202 1555 1555 2.63 LINK MG MG A 202 O HOH A2141 1555 1555 2.59 LINK MG MG A 203 O HOH A2068 1555 1555 2.42 LINK MG MG A 203 O HOH A2136 1555 1555 2.54 CISPEP 1 VAL A 113 PRO A 114 0 -2.22 SITE 1 AC1 6 ASP A 95 ASP A 97 ATP A 200 87Y A 201 SITE 2 AC1 6 MG A 203 HOH A2141 SITE 1 AC2 6 ASP A 95 ASP A 97 ATP A 200 MG A 202 SITE 2 AC2 6 HOH A2068 HOH A2136 SITE 1 AC3 23 ARG A 82 ARG A 84 ALA A 86 GLU A 87 SITE 2 AC3 23 ARG A 88 TRP A 89 ARG A 92 ASP A 95 SITE 3 AC3 23 ASP A 97 ILE A 98 ARG A 110 LEU A 111 SITE 4 AC3 23 THR A 112 HIS A 115 TYR A 116 ARG A 121 SITE 5 AC3 23 87Y A 201 MG A 202 MG A 203 HOH A2136 SITE 6 AC3 23 HOH A2138 HOH A2139 HOH A2140 SITE 1 AC4 13 THR A 42 PRO A 43 LEU A 45 TYR A 53 SITE 2 AC4 13 ASN A 55 TRP A 89 ARG A 92 PHE A 123 SITE 3 AC4 13 ATP A 200 MG A 202 HOH A2084 HOH A2103 SITE 4 AC4 13 HOH A2141 CRYST1 40.960 69.010 115.490 90.00 90.00 90.00 C 2 2 21 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 0.024414 0.000000 0.000000 0.00000 SCALE2 0.000000 0.014503 0.000000 0.00000 SCALE3 0.000000 0.000000 0.008659 0.00000