HEADER TRANSFERASE 23-SEP-00 1FWM TITLE CRYSTAL STRUCTURE OF THE THYMIDYLATE SYNTHASE R166Q MUTANT COMPND MOL_ID: 1; COMPND 2 MOLECULE: THYMIDYLATE SYNTHASE; COMPND 3 CHAIN: A, B; COMPND 4 EC: 2.1.1.45; COMPND 5 ENGINEERED: YES; COMPND 6 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; SOURCE 3 ORGANISM_TAXID: 562; SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 5 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS METHYLTRANSFERASE, TRANSFERASE EXPDTA X-RAY DIFFRACTION AUTHOR R.R.SOTELO-MUNDO,L.CHANGCHIEN,F.MALEY,W.R.MONTFORT REVDAT 8 03-NOV-21 1FWM 1 REMARK SEQADV LINK REVDAT 7 18-APR-18 1FWM 1 REMARK REVDAT 6 04-OCT-17 1FWM 1 REMARK REVDAT 5 13-JUL-11 1FWM 1 VERSN REVDAT 4 03-NOV-09 1FWM 1 HETATM REVDAT 3 24-FEB-09 1FWM 1 VERSN REVDAT 2 25-APR-06 1FWM 1 JRNL REVDAT 1 11-NOV-03 1FWM 0 JRNL AUTH R.R.SOTELO-MUNDO,L.CHANGCHIEN,F.MALEY,W.R.MONTFORT JRNL TITL CRYSTAL STRUCTURES OF THYMIDYLATE SYNTHASE MUTANT R166Q: JRNL TITL 2 STRUCTURAL BASIS FOR THE NEARLY COMPLETE LOSS OF CATALYTIC JRNL TITL 3 ACTIVITY. JRNL REF J.BIOCHEM.MOL.TOXICOL. V. 20 88 2006 JRNL REFN ISSN 1095-6670 JRNL PMID 16615077 JRNL DOI 10.1002/JBT.20122 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH R.R.SOTELO-MUNDO REMARK 1 TITL CRYSTALLOGRAPHICS STUDIED OF THYMIDYLATE SYNTHASE: STRUCTURE REMARK 1 TITL 2 OF A MAMMALIAN ENZYME AND ANALYSES OF INVARIANT REMARK 1 TITL 3 NON-CATALYTIC RESIDUES IN A BACTERIAL ENZYME REMARK 1 REF THESIS 1 1999 REMARK 2 REMARK 2 RESOLUTION. 2.20 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- REMARK 3 : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU, REMARK 3 : READ,RICE,SIMONSON,WARREN REMARK 3 REMARK 3 REFINEMENT TARGET : ENGH & HUBER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.20 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 17.95 REMARK 3 DATA CUTOFF (SIGMA(F)) : 3.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 2512983.040 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 79.6 REMARK 3 NUMBER OF REFLECTIONS : 25280 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 SET) : 0.180 REMARK 3 FREE R VALUE : 0.225 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 9.900 REMARK 3 FREE R VALUE TEST SET COUNT : 2493 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.004 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 6 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 2.20 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.34 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 57.00 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 2708 REMARK 3 BIN R VALUE (WORKING SET) : 0.2120 REMARK 3 BIN FREE R VALUE : 0.2510 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 9.80 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 295 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.015 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 4302 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 80 REMARK 3 SOLVENT ATOMS : 170 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 10.70 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 28.00 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -1.45000 REMARK 3 B22 (A**2) : -1.45000 REMARK 3 B33 (A**2) : 2.91000 REMARK 3 B12 (A**2) : -0.25000 REMARK 3 B13 (A**2) : 0.00000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : 0.22 REMARK 3 ESD FROM SIGMAA (A) : 0.21 REMARK 3 LOW RESOLUTION CUTOFF (A) : 5.00 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : 0.29 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.26 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.011 REMARK 3 BOND ANGLES (DEGREES) : 1.700 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 25.40 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.480 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) : 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 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.33 REMARK 3 BSOL : 42.73 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 : PROTEIN_REP.PARAM REMARK 3 PARAMETER FILE 2 : CBX.PAR REMARK 3 PARAMETER FILE 3 : WATER_REP.PARAM REMARK 3 PARAMETER FILE 4 : CB3.PAR REMARK 3 PARAMETER FILE 5 : ION.PARAM REMARK 3 PARAMETER FILE 6 : NULL REMARK 3 TOPOLOGY FILE 1 : PROTEIN.TOP REMARK 3 TOPOLOGY FILE 2 : CBX.TOP REMARK 3 TOPOLOGY FILE 3 : WATER.TOP REMARK 3 TOPOLOGY FILE 4 : CB3.TOP REMARK 3 TOPOLOGY FILE 5 : ION.TOP REMARK 3 TOPOLOGY FILE 6 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1FWM COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 03-OCT-00. REMARK 100 THE DEPOSITION ID IS D_1000011960. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 13-OCT-97 REMARK 200 TEMPERATURE (KELVIN) : 298 REMARK 200 PH : 8.0 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 : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : DIFFRACTOMETER REMARK 200 DETECTOR MANUFACTURER : ENRAF-NONIUS FAST REMARK 200 INTENSITY-INTEGRATION SOFTWARE : ROTAVATA, MADNESS REMARK 200 DATA SCALING SOFTWARE : CCP4 (AGROVATA, ROTAVATA REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 31445 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.200 REMARK 200 RESOLUTION RANGE LOW (A) : 18.137 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.2 REMARK 200 DATA REDUNDANCY : 3.100 REMARK 200 R MERGE (I) : 0.09000 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 6.7000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.20 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.26 REMARK 200 COMPLETENESS FOR SHELL (%) : 98.5 REMARK 200 DATA REDUNDANCY IN SHELL : 2.50 REMARK 200 R MERGE FOR SHELL (I) : 0.38000 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: NULL REMARK 200 SOFTWARE USED: CNS REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 52.35 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.58 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: AMMONIUM SULFATE, POTASSIUM SULFATE, REMARK 280 EDTA, DTT, PH 8.0, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE REMARK 280 298K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 63 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z REMARK 290 3555 -X+Y,-X,Z REMARK 290 4555 -X,-Y,Z+1/2 REMARK 290 5555 Y,-X+Y,Z+1/2 REMARK 290 6555 X-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 -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 0.00000 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 0.00000 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 33.83500 REMARK 290 SMTRY1 5 0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 5 -0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 33.83500 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 33.83500 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 300 REMARK: THE BIOLOGICAL ASSEMBLY IS A DIMER CONSTRUCTED FROM CHAINS REMARK 300 A AND B. BOTH DIMERS ARE CONTAINED IN THE ASSYMETRIC UNIT IN THIS REMARK 300 SPACE GROUP 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: 7170 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 19710 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -65.0 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 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 LYS A 48 145.51 -173.71 REMARK 500 PRO A 92 71.32 -69.51 REMARK 500 TYR A 94 -64.87 -26.36 REMARK 500 ALA A 100 64.37 -154.53 REMARK 500 ASP A 122 52.72 -141.64 REMARK 500 ILE B 369 4.61 -66.84 REMARK 500 TYR B 394 -72.08 -19.70 REMARK 500 ALA B 400 69.84 -152.54 REMARK 500 LEU B 443 143.26 -174.55 REMARK 500 ASP B 505 99.30 -69.25 REMARK 500 PRO B 528 -165.87 -69.27 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 265 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 565 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CB3 A 266 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CB3 B 566 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1FFL RELATED DB: PDB REMARK 900 1FFL CONTAINS THE SAME PROTEIN IN THE ABSENCE OF LIGANDS (APO-TS) DBREF 1FWM A 1 264 UNP P0A884 TYSY_ECOLI 1 264 DBREF 1FWM B 301 564 UNP P0A884 TYSY_ECOLI 1 264 SEQADV 1FWM CXM A 1 UNP P0A884 MET 1 MODIFIED RESIDUE SEQADV 1FWM GLN A 166 UNP P0A884 ARG 166 ENGINEERED MUTATION SEQADV 1FWM CXM B 301 UNP P0A884 MET 1 MODIFIED RESIDUE SEQADV 1FWM GLN B 466 UNP P0A884 ARG 166 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 CYS HIS ALA PHE PHE GLN PHE TYR VAL ALA ASP SEQRES 13 A 264 GLY LYS LEU SER CYS GLN LEU TYR GLN GLN 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 SEQRES 1 B 264 CXM LYS GLN TYR LEU GLU LEU MET GLN LYS VAL LEU ASP SEQRES 2 B 264 GLU GLY THR GLN LYS ASN ASP ARG THR GLY THR GLY THR SEQRES 3 B 264 LEU SER ILE PHE GLY HIS GLN MET ARG PHE ASN LEU GLN SEQRES 4 B 264 ASP GLY PHE PRO LEU VAL THR THR LYS ARG CYS HIS LEU SEQRES 5 B 264 ARG SER ILE ILE HIS GLU LEU LEU TRP PHE LEU GLN GLY SEQRES 6 B 264 ASP THR ASN ILE ALA TYR LEU HIS GLU ASN ASN VAL THR SEQRES 7 B 264 ILE TRP ASP GLU TRP ALA ASP GLU ASN GLY ASP LEU GLY SEQRES 8 B 264 PRO VAL TYR GLY LYS GLN TRP ARG ALA TRP PRO THR PRO SEQRES 9 B 264 ASP GLY ARG HIS ILE ASP GLN ILE THR THR VAL LEU ASN SEQRES 10 B 264 GLN LEU LYS ASN ASP PRO ASP SER ARG ARG ILE ILE VAL SEQRES 11 B 264 SER ALA TRP ASN VAL GLY GLU LEU ASP LYS MET ALA LEU SEQRES 12 B 264 ALA PRO CYS HIS ALA PHE PHE GLN PHE TYR VAL ALA ASP SEQRES 13 B 264 GLY LYS LEU SER CYS GLN LEU TYR GLN GLN SER CYS ASP SEQRES 14 B 264 VAL PHE LEU GLY LEU PRO PHE ASN ILE ALA SER TYR ALA SEQRES 15 B 264 LEU LEU VAL HIS MET MET ALA GLN GLN CYS ASP LEU GLU SEQRES 16 B 264 VAL GLY ASP PHE VAL TRP THR GLY GLY ASP THR HIS LEU SEQRES 17 B 264 TYR SER ASN HIS MET ASP GLN THR HIS LEU GLN LEU SER SEQRES 18 B 264 ARG GLU PRO ARG PRO LEU PRO LYS LEU ILE ILE LYS ARG SEQRES 19 B 264 LYS PRO GLU SER ILE PHE ASP TYR ARG PHE GLU ASP PHE SEQRES 20 B 264 GLU ILE GLU GLY TYR ASP PRO HIS PRO GLY ILE LYS ALA SEQRES 21 B 264 PRO VAL ALA ILE MODRES 1FWM CXM A 1 MET N-CARBOXYMETHIONINE MODRES 1FWM CXM B 301 MET N-CARBOXYMETHIONINE HET CXM A 1 11 HET CXM B 301 11 HET SO4 A 265 5 HET SO4 A 565 5 HET CB3 A 266 35 HET CB3 B 566 35 HETNAM CXM N-CARBOXYMETHIONINE HETNAM SO4 SULFATE ION HETNAM CB3 10-PROPARGYL-5,8-DIDEAZAFOLIC ACID FORMUL 1 CXM 2(C6 H11 N O4 S) FORMUL 3 SO4 2(O4 S 2-) FORMUL 5 CB3 2(C24 H23 N5 O6) FORMUL 7 HOH *170(H2 O) HELIX 1 1 LYS A 2 GLY A 15 1 14 HELIX 2 2 HIS A 51 GLN A 64 1 14 HELIX 3 3 ILE A 69 ASN A 75 1 7 HELIX 4 4 TRP A 80 ALA A 84 5 5 HELIX 5 5 VAL A 93 ALA A 100 1 8 HELIX 6 6 ASP A 110 ASP A 122 1 13 HELIX 7 7 ASN A 134 MET A 141 5 8 HELIX 8 8 LEU A 172 CYS A 192 1 21 HELIX 9 9 HIS A 212 SER A 221 1 10 HELIX 10 10 ARG A 243 GLU A 245 5 3 HELIX 11 11 LYS B 302 GLY B 315 1 14 HELIX 12 12 GLN B 339 GLY B 341 5 3 HELIX 13 13 HIS B 351 GLN B 364 1 14 HELIX 14 14 ILE B 369 ASN B 375 1 7 HELIX 15 15 TRP B 380 ALA B 384 5 5 HELIX 16 16 VAL B 393 ALA B 400 1 8 HELIX 17 17 ASP B 410 ASP B 422 1 13 HELIX 18 18 ASN B 434 MET B 441 5 8 HELIX 19 19 LEU B 472 CYS B 492 1 21 HELIX 20 20 HIS B 512 SER B 521 1 10 HELIX 21 21 ARG B 543 GLU B 545 5 3 SHEET 1 A 6 THR A 16 LYS A 18 0 SHEET 2 A 6 THR A 26 ASN A 37 -1 N THR A 26 O LYS A 18 SHEET 3 A 6 GLU A 195 TYR A 209 -1 N PHE A 199 O PHE A 36 SHEET 4 A 6 LYS A 158 ASP A 169 1 N LEU A 159 O GLU A 195 SHEET 5 A 6 PHE A 149 ALA A 155 -1 O PHE A 149 N 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 N ILE A 109 O 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 SHEET 1 D 6 THR B 316 LYS B 318 0 SHEET 2 D 6 THR B 326 ASN B 337 -1 O THR B 326 N LYS B 318 SHEET 3 D 6 GLU B 495 TYR B 509 -1 N PHE B 499 O PHE B 336 SHEET 4 D 6 LYS B 458 ASP B 469 1 O LEU B 459 N GLY B 497 SHEET 5 D 6 PHE B 449 ALA B 455 -1 O PHE B 449 N TYR B 464 SHEET 6 D 6 ILE B 429 SER B 431 -1 N VAL B 430 O PHE B 450 SHEET 1 E 2 TRP B 401 PRO B 402 0 SHEET 2 E 2 HIS B 408 ILE B 409 -1 O ILE B 409 N TRP B 401 SHEET 1 F 2 LYS B 529 ILE B 532 0 SHEET 2 F 2 PHE B 547 GLU B 550 -1 O GLU B 548 N ILE B 531 LINK C CXM A 1 N LYS A 2 1555 1555 1.33 LINK C CXM B 301 N LYS B 302 1555 1555 1.33 SITE 1 AC1 6 ARG A 21 SER A 167 CB3 A 266 HOH A 641 SITE 2 AC1 6 ARG B 426 ARG B 427 SITE 1 AC2 6 ARG A 126 ARG A 127 HOH A 616 ARG B 321 SITE 2 AC2 6 SER B 467 CB3 B 566 SITE 1 AC3 17 GLU A 58 ILE A 79 TRP A 80 TRP A 83 SITE 2 AC3 17 TYR A 94 LEU A 143 ALA A 144 CYS A 146 SITE 3 AC3 17 PHE A 176 ASN A 177 LYS A 259 VAL A 262 SITE 4 AC3 17 SO4 A 265 HOH A 635 HOH A 639 HOH A 692 SITE 5 AC3 17 HOH A 732 SITE 1 AC4 15 SO4 A 565 HIS B 351 ILE B 379 TRP B 380 SITE 2 AC4 15 TRP B 383 TYR B 394 LEU B 443 ALA B 444 SITE 3 AC4 15 CYS B 446 GLY B 473 PHE B 476 ASN B 477 SITE 4 AC4 15 HOH B 620 HOH B 640 HOH B 753 CRYST1 127.060 127.060 67.670 90.00 90.00 120.00 P 63 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 0.007870 0.004544 0.000000 0.00000 SCALE2 0.000000 0.009088 0.000000 0.00000 SCALE3 0.000000 0.000000 0.014778 0.00000 HETATM 1 N CXM A 1 22.181 20.289 49.433 1.00 20.11 N HETATM 2 CA CXM A 1 23.510 20.761 49.787 1.00 19.19 C HETATM 3 CB CXM A 1 24.502 20.421 48.677 1.00 21.38 C HETATM 4 CG CXM A 1 24.665 18.950 48.338 1.00 23.43 C HETATM 5 SD CXM A 1 25.862 18.722 47.003 1.00 24.08 S HETATM 6 CE CXM A 1 24.826 18.846 45.552 1.00 21.95 C HETATM 7 C CXM A 1 23.497 22.271 49.969 1.00 20.70 C HETATM 8 O CXM A 1 22.739 22.981 49.299 1.00 19.55 O HETATM 9 CN CXM A 1 21.688 19.166 49.918 1.00 20.95 C HETATM 10 ON1 CXM A 1 20.557 18.865 49.650 1.00 24.15 O HETATM 11 ON2 CXM A 1 22.430 18.486 50.598 1.00 21.63 O