HEADER OXIDOREDUCTASE 28-MAY-04 1TG2 TITLE CRYSTAL STRUCTURE OF PHENYLALANINE HYDROXYLASE A313T MUTANT WITH 7,8- TITLE 2 DIHYDROBIOPTERIN BOUND COMPND MOL_ID: 1; COMPND 2 MOLECULE: PHENYLALANINE-4-HYDROXYLASE; COMPND 3 CHAIN: A; COMPND 4 FRAGMENT: DELTA NH 1-102-DELTA COOH 428 HUMAN PHENYLALANINE COMPND 5 HYDROXYLASE; COMPND 6 SYNONYM: PAH, PHE-4- MONOOXYGENASE; COMPND 7 EC: 1.14.16.1; COMPND 8 ENGINEERED: YES; COMPND 9 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: PAH; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 7 EXPRESSION_SYSTEM_TAXID: 469008; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PMALC2 KEYWDS PHENYLALANINE HYDROXYLASE PHENYLKETONURIA MUTANT A313T IN COMPLEX KEYWDS 2 WITH COFACTOR ANALOGUE 7, 8-DIHYDROBIOPTERIN, OXIDOREDUCTASE EXPDTA X-RAY DIFFRACTION AUTHOR H.ERLANDSEN,A.L.PEY,A.GAMEZ,B.PEREZ,L.R.DESVIAT,C.AGUADO,R.KOCH, AUTHOR 2 S.SURENDRAN,S.TYRING,R.MATALON,C.R.SCRIVER,M.UGARTE,A.MARTINEZ, AUTHOR 3 R.C.STEVENS REVDAT 4 23-AUG-23 1TG2 1 REMARK REVDAT 3 27-OCT-21 1TG2 1 REMARK SEQADV LINK REVDAT 2 24-FEB-09 1TG2 1 VERSN REVDAT 1 30-NOV-04 1TG2 0 JRNL AUTH H.ERLANDSEN,A.L.PEY,A.GAMEZ,B.PEREZ,L.R.DESVIAT,C.AGUADO, JRNL AUTH 2 R.KOCH,S.SURENDRAN,S.TYRING,R.MATALON,C.R.SCRIVER,M.UGARTE, JRNL AUTH 3 A.MARTINEZ,R.C.STEVENS JRNL TITL CORRECTION OF KINETIC AND STABILITY DEFECTS BY JRNL TITL 2 TETRAHYDROBIOPTERIN IN PHENYLKETONURIA PATIENTS WITH CERTAIN JRNL TITL 3 PHENYLALANINE HYDROXYLASE MUTATIONS. JRNL REF PROC.NATL.ACAD.SCI.USA V. 101 16903 2004 JRNL REFN ISSN 0027-8424 JRNL PMID 15557004 JRNL DOI 10.1073/PNAS.0407256101 REMARK 2 REMARK 2 RESOLUTION. 2.20 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 1.1 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) : 19.91 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 295349.870 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 95.4 REMARK 3 NUMBER OF REFLECTIONS : 22008 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) : 0.213 REMARK 3 FREE R VALUE : 0.254 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.900 REMARK 3 FREE R VALUE TEST SET COUNT : 1075 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.008 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) (%) : 90.90 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 3281 REMARK 3 BIN R VALUE (WORKING SET) : 0.2770 REMARK 3 BIN FREE R VALUE : 0.3210 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 4.70 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 162 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.025 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2526 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 18 REMARK 3 SOLVENT ATOMS : 73 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 24.70 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 39.60 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 0.97000 REMARK 3 B22 (A**2) : 3.51000 REMARK 3 B33 (A**2) : -4.49000 REMARK 3 B12 (A**2) : 0.00000 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) : 0.28 REMARK 3 ESD FROM SIGMAA (A) : 0.26 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) : 0.34 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.31 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.012 REMARK 3 BOND ANGLES (DEGREES) : 1.500 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 21.60 REMARK 3 IMPROPER ANGLES (DEGREES) : 0.990 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) : 3.710 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 5.670 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 7.460 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 11.190; 2.500 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.31 REMARK 3 BSOL : 31.08 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 : WATER_REP.PARAM REMARK 3 PARAMETER FILE 3 : NEWFE.PARAM REMARK 3 PARAMETER FILE 4 : H2B.PAR REMARK 3 PARAMETER FILE 5 : NULL REMARK 3 TOPOLOGY FILE 1 : PROTEIN.TOP REMARK 3 TOPOLOGY FILE 2 : WATER_REP.TOP REMARK 3 TOPOLOGY FILE 3 : NEWFE.TOP REMARK 3 TOPOLOGY FILE 4 : H2B.TOP REMARK 3 TOPOLOGY FILE 5 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1TG2 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 03-JUN-04. REMARK 100 THE DEPOSITION ID IS D_1000022618. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 13-MAR-03 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 6.8 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 FR-D REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : OSMIC MIRRORS REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : RIGAKU RAXIS IV REMARK 200 INTENSITY-INTEGRATION SOFTWARE : D*TREK REMARK 200 DATA SCALING SOFTWARE : HKL-2000 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 22757 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.200 REMARK 200 RESOLUTION RANGE LOW (A) : 20.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.0 REMARK 200 DATA REDUNDANCY : 7.500 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.19400 REMARK 200 FOR THE DATA SET : 20.0000 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) : 2.28 REMARK 200 COMPLETENESS FOR SHELL (%) : 99.9 REMARK 200 DATA REDUNDANCY IN SHELL : 7.50 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.81500 REMARK 200 FOR SHELL : 20.00 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: DIFFERENCE FOURIER REMARK 200 SOFTWARE USED: CNS REMARK 200 STARTING MODEL: 1LRM REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 60.04 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.20 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 5-10% ETHYLENE GLYCOL, 20-40 MM PIPES, REMARK 280 PH 6.8, 8-15% PEG 2000, VAPOR DIFFUSION, HANGING DROP, REMARK 280 TEMPERATURE 277K 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 62.14100 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 62.14100 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 33.26700 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 53.87750 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 6 -1.000000 0.000000 0.000000 33.26700 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 53.87750 REMARK 290 SMTRY3 6 0.000000 0.000000 1.000000 62.14100 REMARK 290 SMTRY1 7 -1.000000 0.000000 0.000000 33.26700 REMARK 290 SMTRY2 7 0.000000 1.000000 0.000000 53.87750 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 62.14100 REMARK 290 SMTRY1 8 1.000000 0.000000 0.000000 33.26700 REMARK 290 SMTRY2 8 0.000000 -1.000000 0.000000 53.87750 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 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: 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 461 O HOH A 497 8555 1.86 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 THR A 328 -81.47 -126.77 REMARK 500 PRO A 409 29.21 -72.09 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 FE A 425 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 285 NE2 REMARK 620 2 HIS A 290 NE2 97.5 REMARK 620 3 GLU A 330 OE2 129.2 98.9 REMARK 620 4 HOH A 442 O 169.6 83.8 60.4 REMARK 620 5 HOH A 484 O 94.7 85.1 134.3 75.1 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 FE A 425 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H2B A 426 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1PAH RELATED DB: PDB REMARK 900 RELATED ID: 1TDW RELATED DB: PDB REMARK 900 RELATED ID: 1LRM RELATED DB: PDB DBREF 1TG2 A 117 424 UNP P00439 PH4H_HUMAN 117 424 SEQADV 1TG2 THR A 313 UNP P00439 ALA 313 ENGINEERED MUTATION SEQRES 1 A 308 THR VAL PRO TRP PHE PRO ARG THR ILE GLN GLU LEU ASP SEQRES 2 A 308 ARG PHE ALA ASN GLN ILE LEU SER TYR GLY ALA GLU LEU SEQRES 3 A 308 ASP ALA ASP HIS PRO GLY PHE LYS ASP PRO VAL TYR ARG SEQRES 4 A 308 ALA ARG ARG LYS GLN PHE ALA ASP ILE ALA TYR ASN TYR SEQRES 5 A 308 ARG HIS GLY GLN PRO ILE PRO ARG VAL GLU TYR MET GLU SEQRES 6 A 308 GLU GLU LYS LYS THR TRP GLY THR VAL PHE LYS THR LEU SEQRES 7 A 308 LYS SER LEU TYR LYS THR HIS ALA CYS TYR GLU TYR ASN SEQRES 8 A 308 HIS ILE PHE PRO LEU LEU GLU LYS TYR CYS GLY PHE HIS SEQRES 9 A 308 GLU ASP ASN ILE PRO GLN LEU GLU ASP VAL SER GLN PHE SEQRES 10 A 308 LEU GLN THR CYS THR GLY PHE ARG LEU ARG PRO VAL ALA SEQRES 11 A 308 GLY LEU LEU SER SER ARG ASP PHE LEU GLY GLY LEU ALA SEQRES 12 A 308 PHE ARG VAL PHE HIS CYS THR GLN TYR ILE ARG HIS GLY SEQRES 13 A 308 SER LYS PRO MET TYR THR PRO GLU PRO ASP ILE CYS HIS SEQRES 14 A 308 GLU LEU LEU GLY HIS VAL PRO LEU PHE SER ASP ARG SER SEQRES 15 A 308 PHE ALA GLN PHE SER GLN GLU ILE GLY LEU ALA SER LEU SEQRES 16 A 308 GLY THR PRO ASP GLU TYR ILE GLU LYS LEU ALA THR ILE SEQRES 17 A 308 TYR TRP PHE THR VAL GLU PHE GLY LEU CYS LYS GLN GLY SEQRES 18 A 308 ASP SER ILE LYS ALA TYR GLY ALA GLY LEU LEU SER SER SEQRES 19 A 308 PHE GLY GLU LEU GLN TYR CYS LEU SER GLU LYS PRO LYS SEQRES 20 A 308 LEU LEU PRO LEU GLU LEU GLU LYS THR ALA ILE GLN ASN SEQRES 21 A 308 TYR THR VAL THR GLU PHE GLN PRO LEU TYR TYR VAL ALA SEQRES 22 A 308 GLU SER PHE ASN ASP ALA LYS GLU LYS VAL ARG ASN PHE SEQRES 23 A 308 ALA ALA THR ILE PRO ARG PRO PHE SER VAL ARG TYR ASP SEQRES 24 A 308 PRO TYR THR GLN ARG ILE GLU VAL LEU HET FE A 425 1 HET H2B A 426 17 HETNAM FE FE (III) ION HETNAM H2B 2-AMINO-6-(1,2-DIHYDROXY-PROPYL)-7,8-DIHYDRO-6H- HETNAM 2 H2B PTERIDIN-4-ONE HETSYN H2B QUINONOID 7,8-TETRAHYDROBIOPTERIN FORMUL 2 FE FE 3+ FORMUL 3 H2B C9 H13 N5 O3 FORMUL 4 HOH *73(H2 O) HELIX 1 1 THR A 124 GLN A 134 5 11 HELIX 2 2 GLY A 139 ASP A 143 5 5 HELIX 3 3 ASP A 151 ASN A 167 1 17 HELIX 4 4 MET A 180 ALA A 202 1 23 HELIX 5 5 CYS A 203 GLY A 218 1 16 HELIX 6 6 GLN A 226 GLY A 239 1 14 HELIX 7 7 SER A 250 ALA A 259 1 10 HELIX 8 8 ASP A 282 HIS A 290 1 9 HELIX 9 9 HIS A 290 SER A 295 1 6 HELIX 10 10 ASP A 296 LEU A 311 1 16 HELIX 11 11 PRO A 314 THR A 328 1 15 HELIX 12 12 GLY A 344 SER A 349 1 6 HELIX 13 13 SER A 350 LEU A 358 1 9 HELIX 14 14 GLU A 368 ALA A 373 1 6 HELIX 15 15 SER A 391 THR A 405 1 15 SHEET 1 A 2 ARG A 241 PRO A 244 0 SHEET 2 A 2 VAL A 262 CYS A 265 1 O CYS A 265 N ARG A 243 SHEET 1 B 4 SER A 339 ALA A 342 0 SHEET 2 B 4 LEU A 333 GLN A 336 -1 N CYS A 334 O LYS A 341 SHEET 3 B 4 LEU A 385 ALA A 389 1 O ALA A 389 N LEU A 333 SHEET 4 B 4 LYS A 363 PRO A 366 1 N LEU A 365 O VAL A 388 SHEET 1 C 2 SER A 411 TYR A 414 0 SHEET 2 C 2 ILE A 421 LEU A 424 -1 O GLU A 422 N ARG A 413 LINK NE2 HIS A 285 FE FE A 425 1555 1555 2.13 LINK NE2 HIS A 290 FE FE A 425 1555 1555 2.10 LINK OE2 GLU A 330 FE FE A 425 1555 1555 1.88 LINK FE FE A 425 O HOH A 442 1555 1555 2.63 LINK FE FE A 425 O HOH A 484 1555 1555 2.53 SITE 1 AC1 5 HIS A 285 HIS A 290 GLU A 330 HOH A 442 SITE 2 AC1 5 HOH A 484 SITE 1 AC2 11 VAL A 245 GLY A 247 LEU A 249 SER A 251 SITE 2 AC2 11 PHE A 254 LEU A 255 ALA A 322 TYR A 325 SITE 3 AC2 11 HOH A 429 HOH A 442 HOH A 484 CRYST1 66.534 107.755 124.282 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 0.015030 0.000000 0.000000 0.00000 SCALE2 0.000000 0.009280 0.000000 0.00000 SCALE3 0.000000 0.000000 0.008046 0.00000