HEADER TRANSPORT PROTEIN 23-AUG-05 2ASN TITLE CRYSTAL STRUCTURE OF D1A MUTANT OF NITROPHORIN 2 COMPLEXED WITH TITLE 2 IMIDAZOLE COMPND MOL_ID: 1; COMPND 2 MOLECULE: NITROPHORIN 2; COMPND 3 CHAIN: X; COMPND 4 FRAGMENT: RESIDUES 25-202; COMPND 5 SYNONYM: NP2, PROLIXIN-S; COMPND 6 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RHODNIUS PROLIXUS; SOURCE 3 ORGANISM_TAXID: 13249; SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 5 EXPRESSION_SYSTEM_TAXID: 469008; SOURCE 6 EXPRESSION_SYSTEM_STRAIN: BL21(DE3); SOURCE 7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 8 EXPRESSION_SYSTEM_PLASMID: PET17B KEYWDS BETA BARREL, LIPOCALIN, FERRIC HEME, IMIDAZOLE, TRANSPORT PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR A.WEICHSEL,R.E.BERRY,F.A.WALKER,W.R.MONTFORT REVDAT 3 23-AUG-23 2ASN 1 REMARK SEQADV LINK REVDAT 2 24-FEB-09 2ASN 1 VERSN REVDAT 1 01-AUG-06 2ASN 0 JRNL AUTH A.WEICHSEL,R.E.BERRY,F.A.WALKER,W.R.MONTFORT JRNL TITL CRYSTAL STRUCTURES, LIGAND INDUCED CONFORMATIONAL CHANGE AND JRNL TITL 2 HEME DEFORMATION IN COMPLEXES OF NITROPHORIN 2, A NITRIC JRNL TITL 3 OXIDE TRANSPORT PROTEIN FROM RHODNIUS PROLIXUS JRNL REF TO BE PUBLISHED JRNL REFN REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH J.F.ANDERSEN,W.R.MONTFORT REMARK 1 TITL THE CRYSTAL STRUCTURE OF NITROPHORIN 2 REMARK 1 REF J.BIOL.CHEM. V. 275 30496 2000 REMARK 1 REFN ISSN 0021-9258 REMARK 1 PMID 10884386 REMARK 1 DOI 10.1074/JBC.M002857200 REMARK 2 REMARK 2 RESOLUTION. 1.70 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.2.0003 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) : 1.70 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 16.30 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 73.9 REMARK 3 NUMBER OF REFLECTIONS : 12802 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) : 0.155 REMARK 3 R VALUE (WORKING SET) : 0.152 REMARK 3 FREE R VALUE : 0.209 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT : 680 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) : 1.70 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.74 REMARK 3 REFLECTION IN BIN (WORKING SET) : 573 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 45.66 REMARK 3 BIN R VALUE (WORKING SET) : 0.1410 REMARK 3 BIN FREE R VALUE SET COUNT : 26 REMARK 3 BIN FREE R VALUE : 0.2190 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1400 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 48 REMARK 3 SOLVENT ATOMS : 163 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 18.70 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 10.07 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -0.08000 REMARK 3 B22 (A**2) : -0.08000 REMARK 3 B33 (A**2) : 0.16000 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 OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.149 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.143 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.065 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 1.899 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.961 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.938 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 1506 ; 0.019 ; 0.022 REMARK 3 BOND LENGTHS OTHERS (A): 1294 ; 0.001 ; 0.020 REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 2053 ; 1.782 ; 2.053 REMARK 3 BOND ANGLES OTHERS (DEGREES): 3051 ; 0.862 ; 3.000 REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 186 ; 7.103 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 63 ;33.308 ;30.952 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): 266 ;13.634 ;15.000 REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 2 ; 8.058 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 220 ; 0.108 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 1661 ; 0.009 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): 270 ; 0.001 ; 0.020 REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 264 ; 0.193 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): 1209 ; 0.191 ; 0.200 REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): 703 ; 0.178 ; 0.200 REMARK 3 NON-BONDED TORSION OTHERS (A): 879 ; 0.090 ; 0.200 REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 136 ; 0.160 ; 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): 10 ; 0.156 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): 42 ; 0.186 ; 0.200 REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 23 ; 0.159 ; 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): 1183 ; 1.641 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): 371 ; 0.294 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 1451 ; 1.862 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 806 ; 2.979 ; 3.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 596 ; 3.711 ; 4.500 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 : 1.20 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 2ASN COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 28-SEP-05. REMARK 100 THE DEPOSITION ID IS D_1000034266. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 31-JUL-03 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 : 14-ID-B REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.1808 REMARK 200 MONOCHROMATOR : DIAMOND (111) DOUBLE-CRYSTAL REMARK 200 OPTICS : BENT SI-MIRROR REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : MAR SCANNER 345 MM PLATE REMARK 200 INTENSITY-INTEGRATION SOFTWARE : MOSFLM REMARK 200 DATA SCALING SOFTWARE : CCP4 (SCALA) REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 13482 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.700 REMARK 200 RESOLUTION RANGE LOW (A) : 16.300 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 73.2 REMARK 200 DATA REDUNDANCY : 3.000 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.05000 REMARK 200 FOR THE DATA SET : 8.9000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.70 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.79 REMARK 200 COMPLETENESS FOR SHELL (%) : 38.0 REMARK 200 DATA REDUNDANCY IN SHELL : 2.00 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.13800 REMARK 200 FOR SHELL : 4.700 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: PDB ENTRY 1PEE REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 35.47 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.91 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: SODIUM CITRATE, PH 6.5, VAPOR REMARK 280 DIFFUSION, HANGING DROP, TEMPERATURE 298K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 41 21 2 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 -Y+1/2,X+1/2,Z+1/4 REMARK 290 4555 Y+1/2,-X+1/2,Z+3/4 REMARK 290 5555 -X+1/2,Y+1/2,-Z+1/4 REMARK 290 6555 X+1/2,-Y+1/2,-Z+3/4 REMARK 290 7555 Y,X,-Z REMARK 290 8555 -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 -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 128.36250 REMARK 290 SMTRY1 3 0.000000 -1.000000 0.000000 17.19450 REMARK 290 SMTRY2 3 1.000000 0.000000 0.000000 17.19450 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 64.18125 REMARK 290 SMTRY1 4 0.000000 1.000000 0.000000 17.19450 REMARK 290 SMTRY2 4 -1.000000 0.000000 0.000000 17.19450 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 192.54375 REMARK 290 SMTRY1 5 -1.000000 0.000000 0.000000 17.19450 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 17.19450 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 64.18125 REMARK 290 SMTRY1 6 1.000000 0.000000 0.000000 17.19450 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 17.19450 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 192.54375 REMARK 290 SMTRY1 7 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY2 7 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 8 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY2 8 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 8 0.000000 0.000000 -1.000000 128.36250 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: X 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 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 X 435 LIES ON A SPECIAL POSITION. REMARK 375 HOH X 455 LIES ON A SPECIAL POSITION. REMARK 375 HOH X 557 LIES ON A SPECIAL POSITION. 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 ASP X 31 80.54 -155.64 REMARK 500 ASP X 141 19.36 58.06 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 HEM X 201 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS X 57 NE2 REMARK 620 2 HEM X 201 NA 94.3 REMARK 620 3 HEM X 201 NB 88.9 90.2 REMARK 620 4 HEM X 201 NC 88.1 177.5 90.4 REMARK 620 5 HEM X 201 ND 89.4 91.6 177.6 87.9 REMARK 620 6 IMD X 202 N1 177.2 88.4 91.9 89.2 89.8 REMARK 620 N 1 2 3 4 5 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM X 201 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE IMD X 202 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1PEE RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF WILD-TYPE NITROPHORIN 2 COMPLEXED WITH REMARK 900 IMIDAZOLE REMARK 900 RELATED ID: 1PM1 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE SAME PROTEIN L122V/L132V DOUBLE MUTANT REMARK 900 COMPLEXED WITH IMIDAZOLE DBREF 2ASN X 2 179 UNP Q26241 NP2_RHOPR 25 202 SEQADV 2ASN ALA X 1 UNP Q26241 CLONING ARTIFACT SEQRES 1 X 179 ALA CYS SER THR ASN ILE SER PRO LYS GLN GLY LEU ASP SEQRES 2 X 179 LYS ALA LYS TYR PHE SER GLY LYS TRP TYR VAL THR HIS SEQRES 3 X 179 PHE LEU ASP LYS ASP PRO GLN VAL THR ASP GLN TYR CYS SEQRES 4 X 179 SER SER PHE THR PRO ARG GLU SER ASP GLY THR VAL LYS SEQRES 5 X 179 GLU ALA LEU TYR HIS TYR ASN ALA ASN LYS LYS THR SER SEQRES 6 X 179 PHE TYR ASN ILE GLY GLU GLY LYS LEU GLU SER SER GLY SEQRES 7 X 179 LEU GLN TYR THR ALA LYS TYR LYS THR VAL ASP LYS LYS SEQRES 8 X 179 LYS ALA VAL LEU LYS GLU ALA ASP GLU LYS ASN SER TYR SEQRES 9 X 179 THR LEU THR VAL LEU GLU ALA ASP ASP SER SER ALA LEU SEQRES 10 X 179 VAL HIS ILE CYS LEU ARG GLU GLY SER LYS ASP LEU GLY SEQRES 11 X 179 ASP LEU TYR THR VAL LEU THR HIS GLN LYS ASP ALA GLU SEQRES 12 X 179 PRO SER ALA LYS VAL LYS SER ALA VAL THR GLN ALA GLY SEQRES 13 X 179 LEU GLN LEU SER GLN PHE VAL GLY THR LYS ASP LEU GLY SEQRES 14 X 179 CYS GLN TYR ASP ASP GLN PHE THR SER LEU HET HEM X 201 43 HET IMD X 202 5 HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETNAM IMD IMIDAZOLE HETSYN HEM HEME FORMUL 2 HEM C34 H32 FE N4 O4 FORMUL 3 IMD C3 H5 N2 1+ FORMUL 4 HOH *163(H2 O) HELIX 1 1 ASP X 13 PHE X 18 1 6 HELIX 2 2 SER X 145 ALA X 155 1 11 HELIX 3 3 GLN X 158 PHE X 162 5 5 HELIX 4 4 LYS X 166 GLY X 169 5 4 HELIX 5 5 ASP X 173 SER X 178 1 6 SHEET 1 A 7 VAL X 94 LYS X 96 0 SHEET 2 A 7 GLN X 80 VAL X 88 -1 N THR X 87 O LEU X 95 SHEET 3 A 7 THR X 64 LEU X 74 -1 N ILE X 69 O LYS X 86 SHEET 4 A 7 THR X 50 ASN X 59 -1 N ASN X 59 O THR X 64 SHEET 5 A 7 TYR X 38 SER X 47 -1 N CYS X 39 O TYR X 58 SHEET 6 A 7 TRP X 22 LEU X 28 -1 N TRP X 22 O PHE X 42 SHEET 7 A 7 VAL X 163 GLY X 164 -1 O VAL X 163 N PHE X 27 SHEET 1 B 7 VAL X 94 LYS X 96 0 SHEET 2 B 7 GLN X 80 VAL X 88 -1 N THR X 87 O LEU X 95 SHEET 3 B 7 ASN X 102 ALA X 111 -1 O TYR X 104 N ALA X 83 SHEET 4 B 7 SER X 115 GLU X 124 -1 O ARG X 123 N SER X 103 SHEET 5 B 7 LYS X 127 THR X 137 -1 O GLY X 130 N LEU X 122 SHEET 6 B 7 TRP X 22 LEU X 28 -1 N TYR X 23 O THR X 137 SHEET 7 B 7 VAL X 163 GLY X 164 -1 O VAL X 163 N PHE X 27 SSBOND 1 CYS X 2 CYS X 121 1555 1555 2.00 SSBOND 2 CYS X 39 CYS X 170 1555 1555 2.01 LINK NE2 HIS X 57 FE HEM X 201 1555 1555 2.02 LINK FE HEM X 201 N1 IMD X 202 1555 1555 2.06 SITE 1 AC1 16 PHE X 27 TYR X 38 SER X 40 LEU X 55 SITE 2 AC1 16 HIS X 57 TYR X 85 LYS X 96 TYR X 104 SITE 3 AC1 16 ILE X 120 LEU X 132 IMD X 202 HOH X 316 SITE 4 AC1 16 HOH X 456 HOH X 459 HOH X 507 HOH X 528 SITE 1 AC2 2 HEM X 201 HOH X 325 CRYST1 34.389 34.389 256.725 90.00 90.00 90.00 P 41 21 2 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 0.029079 0.000000 0.000000 0.00000 SCALE2 0.000000 0.029079 0.000000 0.00000 SCALE3 0.000000 0.000000 0.003895 0.00000