HEADER TRANSFERASE 27-NOV-07 3BGX TITLE E. COLI THYMIDYLATE SYNTHASE C146S MUTANT COMPLEXED WITH DTMP AND MTF COMPND MOL_ID: 1; COMPND 2 MOLECULE: THYMIDYLATE SYNTHASE; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: TS, TSASE; COMPND 5 EC: 2.1.1.45; COMPND 6 ENGINEERED: YES; COMPND 7 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; SOURCE 3 ORGANISM_TAXID: 562; SOURCE 4 GENE: THYA; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 EXPRESSION_SYSTEM_STRAIN: XAC25 THY; SOURCE 8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 9 EXPRESSION_SYSTEM_PLASMID: BLUSCRIPT SK+ KEYWDS METHYLTRANSFERASE, NUCLEOTIDE BIOSYNTHESIS, REPRESSOR, RNA-BINDING, KEYWDS 2 TRANSLATION REGULATION, TRANSFERASE EXPDTA X-RAY DIFFRACTION AUTHOR S.A.ROBERTS,W.R.MONTFORT REVDAT 5 20-OCT-21 3BGX 1 REMARK SEQADV LINK REVDAT 4 18-APR-18 3BGX 1 REMARK REVDAT 3 25-OCT-17 3BGX 1 REMARK REVDAT 2 13-JUL-11 3BGX 1 VERSN REVDAT 1 09-DEC-08 3BGX 0 JRNL AUTH W.B.ARENDALL III,S.A.ROBERTS,D.C.HYATT,A.WEICHSEL, JRNL AUTH 2 A.L.DAHLGREN,W.R.MONTFORT JRNL TITL STRUCTURAL STUDIES OF EARLY EVENTS IN CATALYSIS BY JRNL TITL 2 THYMIDYLATE SYNTHASE JRNL REF TO BE PUBLISHED JRNL REFN REMARK 2 REMARK 2 RESOLUTION. 1.93 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.3.0037 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) : 1.93 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 30.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : 87.6 REMARK 3 NUMBER OF REFLECTIONS : 22295 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) : 0.187 REMARK 3 R VALUE (WORKING SET) : 0.184 REMARK 3 FREE R VALUE : 0.230 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.100 REMARK 3 FREE R VALUE TEST SET COUNT : 1187 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) : 1.93 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.98 REMARK 3 REFLECTION IN BIN (WORKING SET) : 1369 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 73.72 REMARK 3 BIN R VALUE (WORKING SET) : 0.2460 REMARK 3 BIN FREE R VALUE SET COUNT : 73 REMARK 3 BIN FREE R VALUE : 0.2540 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2153 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 64 REMARK 3 SOLVENT ATOMS : 95 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 18.61 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -0.79000 REMARK 3 B22 (A**2) : -0.79000 REMARK 3 B33 (A**2) : 1.19000 REMARK 3 B12 (A**2) : -0.40000 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): 0.161 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.153 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.106 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 3.753 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.957 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.934 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 2307 ; 0.017 ; 0.021 REMARK 3 BOND LENGTHS OTHERS (A): 1544 ; 0.002 ; 0.020 REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 3144 ; 1.793 ; 1.976 REMARK 3 BOND ANGLES OTHERS (DEGREES): 3749 ; 1.056 ; 3.000 REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 266 ; 6.589 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 105 ;36.117 ;24.762 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): 358 ;14.582 ;15.000 REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 13 ;18.993 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 325 ; 0.222 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 2553 ; 0.007 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): 481 ; 0.002 ; 0.020 REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 381 ; 0.206 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): 1493 ; 0.209 ; 0.200 REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): 1071 ; 0.185 ; 0.200 REMARK 3 NON-BONDED TORSION OTHERS (A): 1174 ; 0.089 ; 0.200 REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 71 ; 0.141 ; 0.200 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): 6 ; 0.123 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): 63 ; 0.293 ; 0.200 REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 10 ; 0.201 ; 0.200 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): 1728 ; 0.908 ; 2.000 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): 542 ; 0.126 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 2166 ; 1.114 ; 3.000 REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 1152 ; 1.806 ; 4.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 978 ; 2.771 ; 8.000 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 3BGX COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 05-DEC-07. REMARK 100 THE DEPOSITION ID IS D_1000045506. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 11-DEC-96 REMARK 200 TEMPERATURE (KELVIN) : 293 REMARK 200 PH : 7.5 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 : ENRAF-NONIUS FR571 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : GRAPHITE CRYSTAL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : DIFFRACTOMETER REMARK 200 DETECTOR MANUFACTURER : ENRAF-NONIUS FAST REMARK 200 INTENSITY-INTEGRATION SOFTWARE : PROCOR REMARK 200 DATA SCALING SOFTWARE : CORECT REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 26908 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.900 REMARK 200 RESOLUTION RANGE LOW (A) : 30.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.0 REMARK 200 DATA REDUNDANCY : 3.100 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.06800 REMARK 200 FOR THE DATA SET : 7.0000 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: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS 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 (%): 56.55 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.83 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 2.5 M AMMONIUM SULFATE, 20 MM KH2PO4, REMARK 280 4MM DTT, 4MM DTMP, 4MM METHYLENE TETRAHYDROFOLATE, PH 7.5, VAPOR REMARK 280 DIFFUSION, HANGING DROP, TEMPERATURE 293K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 31 2 1 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 Y,X,-Z REMARK 290 5555 X-Y,-Y,-Z+2/3 REMARK 290 6555 -X,-X+Y,-Z+1/3 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 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 2 0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 38.48667 REMARK 290 SMTRY1 3 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 3 -0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 76.97333 REMARK 290 SMTRY1 4 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 4 0.866025 0.500000 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 0.00000 REMARK 290 SMTRY2 5 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 76.97333 REMARK 290 SMTRY1 6 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 6 -0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 38.48667 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: 6700 ANGSTROM**2 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 76.97333 REMARK 375 REMARK 375 SPECIAL POSITION REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL REMARK 375 POSITIONS. REMARK 375 REMARK 375 ATOM RES CSSEQI REMARK 375 HOH A 295 LIES ON A SPECIAL POSITION. 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 126 NE - CZ - NH2 ANGL. DEV. = 3.0 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 TYR A 94 -63.87 -21.76 REMARK 500 ALA A 100 53.67 -160.77 REMARK 500 ASP A 122 58.02 -143.11 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 SO4 A 267 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 268 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE TMP A 265 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MEF A 266 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 3B9H RELATED DB: PDB REMARK 900 RELATED ID: 3BFI RELATED DB: PDB REMARK 900 RELATED ID: 3BHL RELATED DB: PDB REMARK 900 RELATED ID: 3BHR RELATED DB: PDB DBREF 3BGX A 1 264 UNP P0A884 TYSY_ECOLI 1 264 SEQADV 3BGX SER A 146 UNP P0A884 CYS 146 ENGINEERED MUTATION SEQRES 1 A 264 CXM LYS GLN TYR LEU GLU LEU MET GLN LYS VAL LEU ASP SEQRES 2 A 264 GLU GLY THR GLN LYS ASN ASP ARG THR GLY THR GLY THR SEQRES 3 A 264 LEU SER ILE PHE GLY HIS GLN MET ARG PHE ASN LEU GLN SEQRES 4 A 264 ASP GLY PHE PRO LEU VAL THR THR LYS ARG CYS HIS LEU SEQRES 5 A 264 ARG SER ILE ILE HIS GLU LEU LEU TRP PHE LEU GLN GLY SEQRES 6 A 264 ASP THR ASN ILE ALA TYR LEU HIS GLU ASN ASN VAL THR SEQRES 7 A 264 ILE TRP ASP GLU TRP ALA ASP GLU ASN GLY ASP LEU GLY SEQRES 8 A 264 PRO VAL TYR GLY LYS GLN TRP ARG ALA TRP PRO THR PRO SEQRES 9 A 264 ASP GLY ARG HIS ILE ASP GLN ILE THR THR VAL LEU ASN SEQRES 10 A 264 GLN LEU LYS ASN ASP PRO ASP SER ARG ARG ILE ILE VAL SEQRES 11 A 264 SER ALA TRP ASN VAL GLY GLU LEU ASP LYS MET ALA LEU SEQRES 12 A 264 ALA PRO SER HIS ALA PHE PHE GLN PHE TYR VAL ALA ASP SEQRES 13 A 264 GLY LYS LEU SER CYS GLN LEU TYR GLN ARG SER CYS ASP SEQRES 14 A 264 VAL PHE LEU GLY LEU PRO PHE ASN ILE ALA SER TYR ALA SEQRES 15 A 264 LEU LEU VAL HIS MET MET ALA GLN GLN CYS ASP LEU GLU SEQRES 16 A 264 VAL GLY ASP PHE VAL TRP THR GLY GLY ASP THR HIS LEU SEQRES 17 A 264 TYR SER ASN HIS MET ASP GLN THR HIS LEU GLN LEU SER SEQRES 18 A 264 ARG GLU PRO ARG PRO LEU PRO LYS LEU ILE ILE LYS ARG SEQRES 19 A 264 LYS PRO GLU SER ILE PHE ASP TYR ARG PHE GLU ASP PHE SEQRES 20 A 264 GLU ILE GLU GLY TYR ASP PRO HIS PRO GLY ILE LYS ALA SEQRES 21 A 264 PRO VAL ALA ILE MODRES 3BGX CXM A 1 MET N-CARBOXYMETHIONINE HET CXM A 1 11 HET SO4 A 267 5 HET SO4 A 268 5 HET TMP A 265 21 HET MEF A 266 39 HETNAM CXM N-CARBOXYMETHIONINE HETNAM SO4 SULFATE ION HETNAM TMP THYMIDINE-5'-PHOSPHATE HETNAM MEF N-({4-[(6AR)-3-AMINO-1-OXO-1,2,5,6,6A,7- HETNAM 2 MEF HEXAHYDROIMIDAZO[1,5-F]PTERIDIN-8(9H)- HETNAM 3 MEF YL]PHENYL}CARBONYL)-L-GLUTAMIC ACID HETSYN MEF 5,10-METHYLENE,5,6,7,8-TETRAHYDROFOLATE FORMUL 1 CXM C6 H11 N O4 S FORMUL 2 SO4 2(O4 S 2-) FORMUL 4 TMP C10 H15 N2 O8 P FORMUL 5 MEF C20 H23 N7 O6 FORMUL 6 HOH *95(H2 O) HELIX 1 1 CXM A 1 GLY A 15 1 15 HELIX 2 2 GLN A 39 GLY A 41 5 3 HELIX 3 3 HIS A 51 GLN A 64 1 14 HELIX 4 4 ILE A 69 ASN A 75 1 7 HELIX 5 5 TRP A 80 ALA A 84 5 5 HELIX 6 6 VAL A 93 ALA A 100 1 8 HELIX 7 7 ASP A 110 ASP A 122 1 13 HELIX 8 8 ASN A 134 MET A 141 5 8 HELIX 9 9 LEU A 172 ASP A 193 1 22 HELIX 10 10 HIS A 212 SER A 221 1 10 HELIX 11 11 ARG A 243 GLU A 245 5 3 SHEET 1 A 6 THR A 16 LYS A 18 0 SHEET 2 A 6 THR A 26 ASN A 37 -1 O THR A 26 N LYS A 18 SHEET 3 A 6 GLU A 195 TYR A 209 -1 O TRP A 201 N MET A 34 SHEET 4 A 6 LYS A 158 ASP A 169 1 N GLN A 165 O THR A 202 SHEET 5 A 6 HIS A 147 ALA A 155 -1 N PHE A 149 O TYR A 164 SHEET 6 A 6 ILE A 129 SER A 131 -1 N VAL A 130 O PHE A 150 SHEET 1 B 2 TRP A 101 PRO A 102 0 SHEET 2 B 2 HIS A 108 ILE A 109 -1 O ILE A 109 N TRP A 101 SHEET 1 C 2 LYS A 229 ILE A 232 0 SHEET 2 C 2 PHE A 247 GLU A 250 -1 O GLU A 248 N ILE A 231 LINK C CXM A 1 N LYS A 2 1555 1555 1.32 SITE 1 AC1 4 ARG A 49 LYS A 120 PRO A 256 GLY A 257 SITE 1 AC2 3 LEU A 52 ASN A 121 PHE A 244 SITE 1 AC3 18 ARG A 21 TRP A 80 TYR A 94 ARG A 126 SITE 2 AC3 18 ARG A 127 SER A 146 HIS A 147 GLN A 165 SITE 3 AC3 18 ARG A 166 SER A 167 CYS A 168 ASP A 169 SITE 4 AC3 18 ASN A 177 HIS A 207 TYR A 209 MEF A 266 SITE 5 AC3 18 HOH A 303 HOH A 310 SITE 1 AC4 17 HIS A 51 SER A 54 ILE A 79 TRP A 83 SITE 2 AC4 17 ASP A 169 GLY A 173 PHE A 176 ALA A 263 SITE 3 AC4 17 TMP A 265 HOH A 272 HOH A 278 HOH A 279 SITE 4 AC4 17 HOH A 317 HOH A 318 HOH A 329 HOH A 334 SITE 5 AC4 17 HOH A 353 CRYST1 72.030 72.030 115.460 90.00 90.00 120.00 P 31 2 1 6 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 0.013883 0.008015 0.000000 0.00000 SCALE2 0.000000 0.016031 0.000000 0.00000 SCALE3 0.000000 0.000000 0.008661 0.00000 HETATM 1 N CXM A 1 59.828 16.178 46.020 1.00 22.00 N HETATM 2 CA CXM A 1 60.263 14.909 46.562 1.00 22.47 C HETATM 3 CB CXM A 1 59.061 14.042 46.922 1.00 23.07 C HETATM 4 CG CXM A 1 58.139 14.558 47.958 1.00 24.63 C HETATM 5 SD CXM A 1 56.758 13.391 48.309 1.00 26.07 S HETATM 6 CE CXM A 1 55.674 13.660 46.911 1.00 26.07 C HETATM 7 C CXM A 1 61.015 14.213 45.436 1.00 22.77 C HETATM 8 O CXM A 1 60.655 14.361 44.263 1.00 20.65 O HETATM 9 CN CXM A 1 59.798 17.309 46.738 1.00 22.11 C HETATM 10 ON1 CXM A 1 59.328 18.295 46.178 1.00 21.47 O HETATM 11 ON2 CXM A 1 59.770 17.261 48.002 1.00 21.01 O