HEADER OXIDOREDUCTASE 19-OCT-18 6MT8 TITLE E. COLI DHFR COMPLEX MODELED WITH TWO LIGAND STATES COMPND MOL_ID: 1; COMPND 2 MOLECULE: DIHYDROFOLATE REDUCTASE; COMPND 3 CHAIN: A; COMPND 4 EC: 1.5.1.3; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI (STRAIN K12); SOURCE 3 ORGANISM_TAXID: 83333; SOURCE 4 STRAIN: K12; SOURCE 5 GENE: FOLA, TMRA, B0048, JW0047; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS DHFR, COMPLEX, OXIDOREDUCTASE EXPDTA X-RAY DIFFRACTION AUTHOR H.CAO,J.RODRIGUES,J.BENACH,A.FROMMELT,L.MORISCO,J.KOSS,E.SHAKHNOVICH, AUTHOR 2 J.SKOLNICK REVDAT 3 11-OCT-23 6MT8 1 LINK REVDAT 2 01-JAN-20 6MT8 1 REMARK REVDAT 1 15-MAY-19 6MT8 0 JRNL AUTH H.CAO,J.SKOLNICK JRNL TITL TIME-RESOLVED X-RAY CRYSTALLOGRAPHY CAPTURE OF A SLOW JRNL TITL 2 REACTION TETRAHYDROFOLATE INTERMEDIATE. JRNL REF STRUCT DYN. V. 6 24701 2019 JRNL REFN ESSN 2329-7778 JRNL PMID 30868089 JRNL DOI 10.1063/1.5086436 REMARK 2 REMARK 2 RESOLUTION. 1.35 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX (PHENIX.REFINE: 1.8.4_1496) REMARK 3 AUTHORS : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN REMARK 3 : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE, REMARK 3 : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER, REMARK 3 : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY, REMARK 3 : REETAL PAI,RANDY READ,JANE RICHARDSON, REMARK 3 : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI, REMARK 3 : NICHOLAS SAUTER,JACOB SMITH,LAURENT REMARK 3 : STORONI,TOM TERWILLIGER,PETER ZWART REMARK 3 REMARK 3 REFINEMENT TARGET : NULL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.35 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 31.27 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 1.340 REMARK 3 COMPLETENESS FOR RANGE (%) : 95.3 REMARK 3 NUMBER OF REFLECTIONS : 56412 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.169 REMARK 3 R VALUE (WORKING SET) : 0.167 REMARK 3 FREE R VALUE : 0.190 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 6.500 REMARK 3 FREE R VALUE TEST SET COUNT : 3667 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (IN BINS). REMARK 3 BIN RESOLUTION RANGE COMPL. NWORK NFREE RWORK RFREE REMARK 3 1 31.2784 - 3.9969 1.00 2117 153 0.1476 0.1762 REMARK 3 2 3.9969 - 3.1734 1.00 2124 145 0.1222 0.1364 REMARK 3 3 3.1734 - 2.7725 1.00 2133 146 0.1455 0.1585 REMARK 3 4 2.7725 - 2.5192 1.00 2139 144 0.1464 0.1350 REMARK 3 5 2.5192 - 2.3387 1.00 2139 144 0.1444 0.1696 REMARK 3 6 2.3387 - 2.2008 1.00 2112 148 0.1384 0.1541 REMARK 3 7 2.2008 - 2.0906 1.00 2129 147 0.1375 0.1918 REMARK 3 8 2.0906 - 1.9996 1.00 2097 150 0.1416 0.1667 REMARK 3 9 1.9996 - 1.9227 1.00 2149 151 0.1533 0.1850 REMARK 3 10 1.9227 - 1.8563 1.00 2145 144 0.1611 0.2058 REMARK 3 11 1.8563 - 1.7983 1.00 2118 150 0.1749 0.2021 REMARK 3 12 1.7983 - 1.7469 1.00 2131 148 0.1753 0.2231 REMARK 3 13 1.7469 - 1.7009 1.00 2113 149 0.1978 0.2320 REMARK 3 14 1.7009 - 1.6594 1.00 2140 144 0.1967 0.2602 REMARK 3 15 1.6594 - 1.6217 1.00 2089 149 0.1949 0.2110 REMARK 3 16 1.6217 - 1.5872 1.00 2148 156 0.2023 0.2153 REMARK 3 17 1.5872 - 1.5554 1.00 2118 145 0.2116 0.2337 REMARK 3 18 1.5554 - 1.5261 1.00 2147 151 0.2364 0.2638 REMARK 3 19 1.5261 - 1.4988 1.00 2117 144 0.2575 0.2878 REMARK 3 20 1.4988 - 1.4734 0.97 2019 139 0.2874 0.2902 REMARK 3 21 1.4734 - 1.4497 0.94 2053 139 0.2898 0.3742 REMARK 3 22 1.4497 - 1.4274 0.88 1885 131 0.3166 0.3070 REMARK 3 23 1.4274 - 1.4064 0.85 1798 131 0.3232 0.3569 REMARK 3 24 1.4064 - 1.3866 0.77 1658 113 0.3380 0.3552 REMARK 3 25 1.3866 - 1.3678 0.72 1521 106 0.3539 0.3756 REMARK 3 26 1.3678 - 1.3501 0.66 1406 100 0.3623 0.3340 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : NULL REMARK 3 SOLVENT RADIUS : 1.11 REMARK 3 SHRINKAGE RADIUS : 0.90 REMARK 3 K_SOL : NULL REMARK 3 B_SOL : NULL REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.170 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 21.820 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 14.04 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 21.06 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 TWINNING INFORMATION. REMARK 3 FRACTION: NULL REMARK 3 OPERATOR: NULL REMARK 3 REMARK 3 DEVIATIONS FROM IDEAL VALUES. REMARK 3 RMSD COUNT REMARK 3 BOND : 0.007 1471 REMARK 3 ANGLE : 1.278 2014 REMARK 3 CHIRALITY : 0.069 205 REMARK 3 PLANARITY : 0.006 265 REMARK 3 DIHEDRAL : 12.657 533 REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : NULL REMARK 3 REMARK 3 NCS DETAILS REMARK 3 NUMBER OF NCS GROUPS : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 6MT8 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 22-OCT-18. REMARK 100 THE DEPOSITION ID IS D_1000237554. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 10-JUL-18 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 6.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : APS REMARK 200 BEAMLINE : 31-ID REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.97931 REMARK 200 MONOCHROMATOR : KOHZU HLD-4 DOUBLE CRYSTAL REMARK 200 OPTICS : DIAMOND(111) REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : RAYONIX MX-225 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : XDS REMARK 200 DATA SCALING SOFTWARE : XSCALE REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 56495 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.210 REMARK 200 RESOLUTION RANGE LOW (A) : 31.270 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 81.6 REMARK 200 DATA REDUNDANCY : 5.823 REMARK 200 R MERGE (I) : 0.10000 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 9.4400 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.21 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.28 REMARK 200 COMPLETENESS FOR SHELL (%) : 23.2 REMARK 200 DATA REDUNDANCY IN SHELL : 1.90 REMARK 200 R MERGE FOR SHELL (I) : 2.15400 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 0.390 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: PHASER REMARK 200 STARTING MODEL: 6CW7 REMARK 200 REMARK 200 REMARK: RECTANGULAR BLOCKS, WITH LONGEST DIMENSION OF 0.3-0.8MM REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 33.29 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.84 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 20 MG/ML PROTEIN WORKING STOCK WAS REMARK 280 PREPARED FROM 2:1 V/V MIXING OF 30MG/ML PROTEIN IN 20MM TRIS PH REMARK 280 8, 1MM DTT AND 50MM HEPES PH 7.3, 100MM NACL. THEN THE WORKING REMARK 280 PROTEIN STOCK AT 20 MG/ML IS MIXED AT 1:1 V/V RATIO WITH REMARK 280 RESERVOIR SOLUTION OF 0.1M MES PH 6.5, 30% PEG3350, 0.4M MGCL2, REMARK 280 VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 293.15K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X+1/2,-Y,Z+1/2 REMARK 290 3555 -X,Y+1/2,-Z+1/2 REMARK 290 4555 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 17.02500 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 39.50700 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 25.83300 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 39.50700 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 17.02500 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 25.83300 REMARK 290 SMTRY3 4 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: PISA 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 465 REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 REMARK 465 M RES C SSSEQI REMARK 465 GLU A 17 REMARK 465 ASN A 18 REMARK 465 ALA A 19 REMARK 465 HIS A 163 REMARK 465 HIS A 164 REMARK 465 HIS A 165 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT REMARK 500 REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT. REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI DISTANCE REMARK 500 HN0 DHF A 209 O HOH A 302 1.45 REMARK 500 O HOH A 434 O HOH A 497 2.08 REMARK 500 NZ LYS A 58 O HOH A 301 2.13 REMARK 500 N10 DHF A 209 O HOH A 302 2.16 REMARK 500 O HOH A 434 O HOH A 441 2.18 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC REMARK 500 SYMMETRY ARE IN CLOSE CONTACT. AN ATOM LOCATED WITHIN 0.15 REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375 REMARK 500 INSTEAD OF REMARK 500. ATOMS WITH NON-BLANK ALTERNATE REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS. REMARK 500 REMARK 500 DISTANCE CUTOFF: REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI SSYMOP DISTANCE REMARK 500 O HOH A 361 O HOH A 410 1655 2.13 REMARK 500 O HOH A 325 O HOH A 412 3444 2.15 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 207 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 70 OD2 REMARK 620 2 HOH A 313 O 100.5 REMARK 620 3 HOH A 341 O 78.3 151.0 REMARK 620 4 HOH A 385 O 78.3 117.1 91.2 REMARK 620 5 HOH A 392 O 86.1 72.8 78.3 162.7 REMARK 620 6 HOH A 465 O 163.9 88.7 87.3 109.4 84.0 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 MG A 204 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU A 101 OE1 REMARK 620 2 GLU A 139 OE1 99.4 REMARK 620 3 GLU A 139 OE2 99.0 1.5 REMARK 620 4 HOH A 336 O 88.8 53.1 54.4 REMARK 620 5 HOH A 352 O 86.4 123.2 121.7 173.3 REMARK 620 6 HOH A 388 O 89.2 35.2 33.7 86.1 89.1 REMARK 620 7 HOH A 420 O 176.5 82.3 82.6 94.7 90.1 90.4 REMARK 620 N 1 2 3 4 5 6 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 MG A 205 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU A 101 OE2 REMARK 620 2 SER A 138 O 75.3 REMARK 620 3 SER A 138 OG 72.7 6.0 REMARK 620 4 HOH A 370 O 97.3 44.4 50.4 REMARK 620 5 HOH A 457 O 101.4 58.3 54.5 90.0 REMARK 620 N 1 2 3 4 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 MG A 206 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH A 326 O REMARK 620 2 HOH A 380 O 89.5 REMARK 620 3 HOH A 415 O 175.1 95.0 REMARK 620 4 HOH A 443 O 86.6 176.1 88.9 REMARK 620 5 HOH A 486 O 87.4 102.2 89.7 78.0 REMARK 620 N 1 2 3 4 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 A 202 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue CL A 203 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue MG A 204 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue MG A 205 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue MG A 206 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue MG A 207 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 6MR9 RELATED DB: PDB REMARK 900 MODELED WITH A SINGLE INTERMEDIATE STATE DBREF 6MT8 A 1 159 UNP P0ABQ4 DYR_ECOLI 1 159 SEQADV 6MT8 HIS A 160 UNP P0ABQ4 EXPRESSION TAG SEQADV 6MT8 HIS A 161 UNP P0ABQ4 EXPRESSION TAG SEQADV 6MT8 HIS A 162 UNP P0ABQ4 EXPRESSION TAG SEQADV 6MT8 HIS A 163 UNP P0ABQ4 EXPRESSION TAG SEQADV 6MT8 HIS A 164 UNP P0ABQ4 EXPRESSION TAG SEQADV 6MT8 HIS A 165 UNP P0ABQ4 EXPRESSION TAG SEQRES 1 A 165 MET ILE SER LEU ILE ALA ALA LEU ALA VAL ASP ARG VAL SEQRES 2 A 165 ILE GLY MET GLU ASN ALA MET PRO TRP ASN LEU PRO ALA SEQRES 3 A 165 ASP LEU ALA TRP PHE LYS ARG ASN THR LEU ASN LYS PRO SEQRES 4 A 165 VAL ILE MET GLY ARG HIS THR TRP GLU SER ILE GLY ARG SEQRES 5 A 165 PRO LEU PRO GLY ARG LYS ASN ILE ILE LEU SER SER GLN SEQRES 6 A 165 PRO GLY THR ASP ASP ARG VAL THR TRP VAL LYS SER VAL SEQRES 7 A 165 ASP GLU ALA ILE ALA ALA CYS GLY ASP VAL PRO GLU ILE SEQRES 8 A 165 MET VAL ILE GLY GLY GLY ARG VAL TYR GLU GLN PHE LEU SEQRES 9 A 165 PRO LYS ALA GLN LYS LEU TYR LEU THR HIS ILE ASP ALA SEQRES 10 A 165 GLU VAL GLU GLY ASP THR HIS PHE PRO ASP TYR GLU PRO SEQRES 11 A 165 ASP ASP TRP GLU SER VAL PHE SER GLU PHE HIS ASP ALA SEQRES 12 A 165 ASP ALA GLN ASN SER HIS SER TYR CYS PHE GLU ILE LEU SEQRES 13 A 165 GLU ARG ARG HIS HIS HIS HIS HIS HIS HET CL A 201 1 HET CL A 202 1 HET CL A 203 1 HET MG A 204 1 HET MG A 205 1 HET MG A 206 1 HET MG A 207 1 HET THG A 208 53 HET DHF A 209 51 HETNAM CL CHLORIDE ION HETNAM MG MAGNESIUM ION HETNAM THG (6S)-5,6,7,8-TETRAHYDROFOLATE HETNAM DHF DIHYDROFOLIC ACID FORMUL 2 CL 3(CL 1-) FORMUL 5 MG 4(MG 2+) FORMUL 9 THG C19 H23 N7 O6 FORMUL 10 DHF C19 H21 N7 O6 FORMUL 11 HOH *200(H2 O) HELIX 1 AA1 ALA A 9 VAL A 13 5 5 HELIX 2 AA2 LEU A 24 LEU A 36 1 13 HELIX 3 AA3 ARG A 44 GLY A 51 1 8 HELIX 4 AA4 SER A 77 GLY A 86 1 10 HELIX 5 AA5 GLY A 96 LEU A 104 1 9 HELIX 6 AA6 GLU A 129 ASP A 131 5 3 SHEET 1 AA1 8 THR A 73 VAL A 75 0 SHEET 2 AA1 8 ASN A 59 LEU A 62 1 N ILE A 61 O THR A 73 SHEET 3 AA1 8 VAL A 40 GLY A 43 1 N MET A 42 O LEU A 62 SHEET 4 AA1 8 ILE A 91 VAL A 93 1 O MET A 92 N ILE A 41 SHEET 5 AA1 8 ILE A 2 LEU A 8 1 N SER A 3 O VAL A 93 SHEET 6 AA1 8 ALA A 107 ILE A 115 1 O THR A 113 N LEU A 8 SHEET 7 AA1 8 TYR A 151 ARG A 158 -1 O CYS A 152 N HIS A 114 SHEET 8 AA1 8 TRP A 133 HIS A 141 -1 N HIS A 141 O TYR A 151 LINK OD2 ASP A 70 MG MG A 207 1555 1555 2.11 LINK OE1 GLU A 101 MG MG A 204 1555 1555 2.12 LINK OE2 GLU A 101 MG MG A 205 1555 1555 2.37 LINK O SER A 138 MG MG A 205 1555 3444 2.43 LINK OG SER A 138 MG MG A 205 1555 3444 2.43 LINK OE1BGLU A 139 MG MG A 204 1555 3444 2.05 LINK OE2AGLU A 139 MG MG A 204 1555 3444 2.50 LINK MG MG A 204 O HOH A 336 1555 1555 2.17 LINK MG MG A 204 O HOH A 352 1555 3454 2.13 LINK MG MG A 204 O HOH A 388 1555 1555 2.11 LINK MG MG A 204 O HOH A 420 1555 3454 2.08 LINK MG MG A 205 O HOH A 370 1555 1555 2.31 LINK MG MG A 205 O HOH A 457 1555 1555 2.47 LINK MG MG A 206 O HOH A 326 1555 1555 2.33 LINK MG MG A 206 O HOH A 380 1555 1555 2.05 LINK MG MG A 206 O HOH A 415 1555 1555 2.02 LINK MG MG A 206 O HOH A 443 1555 1555 2.07 LINK MG MG A 206 O HOH A 486 1555 1555 2.15 LINK MG MG A 207 O HOH A 313 1555 4555 2.16 LINK MG MG A 207 O HOH A 341 1555 1555 2.09 LINK MG MG A 207 O HOH A 385 1555 1555 2.33 LINK MG MG A 207 O HOH A 392 1555 1555 2.15 LINK MG MG A 207 O HOH A 465 1555 4455 2.11 CISPEP 1 GLY A 95 GLY A 96 0 4.11 SITE 1 AC1 5 GLY A 43 HIS A 45 THR A 46 GLY A 96 SITE 2 AC1 5 HOH A 432 SITE 1 AC2 5 LYS A 32 ASP A 144 ALA A 145 HOH A 417 SITE 2 AC2 5 HOH A 480 SITE 1 AC3 3 TRP A 30 ARG A 33 HOH A 368 SITE 1 AC4 6 GLU A 101 GLU A 139 HOH A 336 HOH A 352 SITE 2 AC4 6 HOH A 388 HOH A 420 SITE 1 AC5 5 GLU A 101 SER A 138 HOH A 370 HOH A 445 SITE 2 AC5 5 HOH A 457 SITE 1 AC6 6 HIS A 160 HOH A 326 HOH A 380 HOH A 415 SITE 2 AC6 6 HOH A 443 HOH A 486 SITE 1 AC7 6 ASP A 70 HOH A 313 HOH A 341 HOH A 385 SITE 2 AC7 6 HOH A 392 HOH A 465 CRYST1 34.050 51.666 79.014 90.00 90.00 90.00 P 21 21 21 4 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 0.029369 0.000000 0.000000 0.00000 SCALE2 0.000000 0.019355 0.000000 0.00000 SCALE3 0.000000 0.000000 0.012656 0.00000