HEADER LIGAND BINDING PROTEIN 18-AUG-04 1X8P TITLE 0.85 A CRYSTAL STRUCTURE OF NITROPHORIN 4 FROM RHODNIUS PROLIXUS TITLE 2 COMPLEXED WITH AMMONIA AT PH 7.4 COMPND MOL_ID: 1; COMPND 2 MOLECULE: NITROPHORIN 4; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: NP4; COMPND 5 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: BL21DE3; SOURCE 7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 8 EXPRESSION_SYSTEM_PLASMID: PET17B KEYWDS LIPOCALIN; BETA BARREL; FERRIC HEME, LIGAND BINDING PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR D.A.KONDRASHOV,S.A.ROBERTS,A.WEICHSEL,W.R.MONTFORT REVDAT 5 30-OCT-24 1X8P 1 REMARK REVDAT 4 23-AUG-23 1X8P 1 REMARK LINK REVDAT 3 24-FEB-09 1X8P 1 VERSN REVDAT 2 21-DEC-04 1X8P 1 JRNL REVDAT 1 05-OCT-04 1X8P 0 JRNL AUTH D.A.KONDRASHOV,S.A.ROBERTS,A.WEICHSEL,W.R.MONTFORT JRNL TITL PROTEIN FUNCTIONAL CYCLE VIEWED AT ATOMIC RESOLUTION: JRNL TITL 2 CONFORMATIONAL CHANGE AND MOBILITY IN NITROPHORIN 4 AS A JRNL TITL 3 FUNCTION OF PH AND NO BINDING JRNL REF BIOCHEMISTRY V. 43 13637 2004 JRNL REFN ISSN 0006-2960 JRNL PMID 15504026 JRNL DOI 10.1021/BI0483155 REMARK 2 REMARK 2 RESOLUTION. 0.85 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : SHELXL-97 REMARK 3 AUTHORS : G.M.SHELDRICK REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 0.85 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 6.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 82.8 REMARK 3 CROSS-VALIDATION METHOD : FREE R REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (NO CUTOFF). REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : 0.133 REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : 0.131 REMARK 3 FREE R VALUE (NO CUTOFF) : 0.159 REMARK 3 FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT (NO CUTOFF) : 5729 REMARK 3 TOTAL NUMBER OF REFLECTIONS (NO CUTOFF) : 113492 REMARK 3 REMARK 3 FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F). REMARK 3 R VALUE (WORKING + TEST SET, F>4SIG(F)) : 0.125 REMARK 3 R VALUE (WORKING SET, F>4SIG(F)) : 0.124 REMARK 3 FREE R VALUE (F>4SIG(F)) : 0.151 REMARK 3 FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT (F>4SIG(F)) : 4458 REMARK 3 TOTAL NUMBER OF REFLECTIONS (F>4SIG(F)) : 88709 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1428 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 44 REMARK 3 SOLVENT ATOMS : 351 REMARK 3 REMARK 3 MODEL REFINEMENT. REMARK 3 OCCUPANCY SUM OF NON-HYDROGEN ATOMS : 1789.0 REMARK 3 OCCUPANCY SUM OF HYDROGEN ATOMS : 1354.7 REMARK 3 NUMBER OF DISCRETELY DISORDERED RESIDUES : 99 REMARK 3 NUMBER OF LEAST-SQUARES PARAMETERS : 17834 REMARK 3 NUMBER OF RESTRAINTS : 18989 REMARK 3 REMARK 3 RMS DEVIATIONS FROM RESTRAINT TARGET VALUES. REMARK 3 BOND LENGTHS (A) : 0.015 REMARK 3 ANGLE DISTANCES (A) : 0.036 REMARK 3 SIMILAR DISTANCES (NO TARGET VALUES) (A) : 0.000 REMARK 3 DISTANCES FROM RESTRAINT PLANES (A) : 0.450 REMARK 3 ZERO CHIRAL VOLUMES (A**3) : 0.081 REMARK 3 NON-ZERO CHIRAL VOLUMES (A**3) : 0.100 REMARK 3 ANTI-BUMPING DISTANCE RESTRAINTS (A) : 0.081 REMARK 3 RIGID-BOND ADP COMPONENTS (A**2) : 0.006 REMARK 3 SIMILAR ADP COMPONENTS (A**2) : 0.049 REMARK 3 APPROXIMATELY ISOTROPIC ADPS (A**2) : 0.091 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED: NULL REMARK 3 REMARK 3 STEREOCHEMISTRY TARGET VALUES : ENGH & HUBER REMARK 3 SPECIAL CASE: NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: ANISOTROPIC REFINEMENT REDUCED FREE R REMARK 3 (NO CUTOFF) BY 4%. ADDITION OF HYDROGENS IN CALCULATED POSITIONS REMARK 3 FURTHER REDUCED FREE R BY 1% REMARK 4 REMARK 4 1X8P COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 27-AUG-04. REMARK 100 THE DEPOSITION ID IS D_1000030079. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 24-AUG-02 REMARK 200 TEMPERATURE (KELVIN) : 100.0 REMARK 200 PH : 7.4 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : APS REMARK 200 BEAMLINE : 14-BM-C REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.900 REMARK 200 MONOCHROMATOR : BENT GE(111) REMARK 200 OPTICS : BENT CONICAL SI-MIRROR (RH REMARK 200 COATING) REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 4 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : MOSFLM, D*TREK (CRYSTAL CLEAR) REMARK 200 DATA SCALING SOFTWARE : CRYSTALCLEAR D*TREK (MSC/RIGAKU) REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 113853 REMARK 200 RESOLUTION RANGE HIGH (A) : 0.850 REMARK 200 RESOLUTION RANGE LOW (A) : 22.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 82.8 REMARK 200 DATA REDUNDANCY : 4.000 REMARK 200 R MERGE (I) : 0.03800 REMARK 200 R SYM (I) : 0.03800 REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 18.5000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 0.85 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 0.88 REMARK 200 COMPLETENESS FOR SHELL (%) : 56.8 REMARK 200 DATA REDUNDANCY IN SHELL : 3.40 REMARK 200 R MERGE FOR SHELL (I) : 0.32000 REMARK 200 R SYM FOR SHELL (I) : 0.32000 REMARK 200 <I/SIGMA(I)> FOR SHELL : 1.800 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS REMARK 200 SOFTWARE USED: SHELX REMARK 200 STARTING MODEL: 1D2U REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 24.70 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.63 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: AMMONIUM PHOSPHATE, PH 7.4, VAPOR REMARK 280 DIFFUSION, HANGING DROP, TEMPERATURE 300.0K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,Y,-Z REMARK 290 3555 X+1/2,Y+1/2,Z 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 0.00000 REMARK 290 SMTRY2 2 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 3 1.000000 0.000000 0.000000 35.16000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 21.40500 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 4 -1.000000 0.000000 0.000000 35.16000 REMARK 290 SMTRY2 4 0.000000 1.000000 0.000000 21.40500 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 300 REMARK: THE BIOLOGICAL ASSEMBLY IS A MONOMER CONSISTING OF CHAIN A REMARK 300 AND THE HEME, AND CAN BE GENERATED BY THE IDENTITY OPERATION: X,Y,Z 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 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 260 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 327 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 357 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 394 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 425 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 440 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 PRO A 33 C - N - CA ANGL. DEV. = 10.3 DEGREES REMARK 500 ARG A 39 O - C - N ANGL. DEV. = -12.2 DEGREES REMARK 500 TYR A 40 CD1 - CG - CD2 ANGL. DEV. = -7.9 DEGREES REMARK 500 TYR A 40 CB - CG - CD1 ANGL. DEV. = 5.3 DEGREES REMARK 500 TYR A 40 CB - CG - CD1 ANGL. DEV. = 10.8 DEGREES REMARK 500 TYR A 40 CG - CD1 - CE1 ANGL. DEV. = 6.8 DEGREES REMARK 500 TYR A 40 CG - CD2 - CE2 ANGL. DEV. = 7.8 DEGREES REMARK 500 TYR A 40 CZ - CE2 - CD2 ANGL. DEV. = 7.2 DEGREES REMARK 500 TYR A 60 CG - CD1 - CE1 ANGL. DEV. = 7.2 DEGREES REMARK 500 SER A 72 N - CA - CB ANGL. DEV. = -9.3 DEGREES REMARK 500 TYR A 82 CD1 - CE1 - CZ ANGL. DEV. = 6.0 DEGREES REMARK 500 PHE A 107 CB - CG - CD2 ANGL. DEV. = 7.5 DEGREES REMARK 500 PHE A 107 CB - CG - CD1 ANGL. DEV. = -7.8 DEGREES REMARK 500 ASP A 129 CB - CG - OD1 ANGL. DEV. = 6.4 DEGREES REMARK 500 ASP A 142 CB - CG - OD1 ANGL. DEV. = 5.9 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 PHE A 18 56.86 -90.01 REMARK 500 GLU A 32 75.34 -112.19 REMARK 500 ASP A 34 49.88 -96.89 REMARK 500 TYR A 40 126.94 -179.26 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 A 185 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 59 NE2 REMARK 620 2 HEM A 185 NA 89.0 REMARK 620 3 HEM A 185 NB 90.9 89.0 REMARK 620 4 HEM A 185 NC 91.3 179.6 91.2 REMARK 620 5 HEM A 185 ND 90.7 90.0 178.1 89.8 REMARK 620 6 NH3 A 186 N 178.9 90.6 90.0 89.0 88.3 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 A 185 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NH3 A 186 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1D2U RELATED DB: PDB REMARK 900 NP4 IN IDENTICAL CONDITIONS TO 1.1 A RESOLUTION REMARK 900 RELATED ID: 1X8N RELATED DB: PDB REMARK 900 RELATED ID: 1X8O RELATED DB: PDB REMARK 900 RELATED ID: 1X8Q RELATED DB: PDB DBREF 1X8P A 1 184 UNP Q94734 NP4_RHOPR 22 205 SEQRES 1 A 184 ALA CYS THR LYS ASN ALA ILE ALA GLN THR GLY PHE ASN SEQRES 2 A 184 LYS ASP LYS TYR PHE ASN GLY ASP VAL TRP TYR VAL THR SEQRES 3 A 184 ASP TYR LEU ASP LEU GLU PRO ASP ASP VAL PRO LYS ARG SEQRES 4 A 184 TYR CYS ALA ALA LEU ALA ALA GLY THR ALA SER GLY LYS SEQRES 5 A 184 LEU LYS GLU ALA LEU TYR HIS TYR ASP PRO LYS THR GLN SEQRES 6 A 184 ASP THR PHE TYR ASP VAL SER GLU LEU GLN VAL GLU SER SEQRES 7 A 184 LEU GLY LYS TYR THR ALA ASN PHE LYS LYS VAL ASP LYS SEQRES 8 A 184 ASN GLY ASN VAL LYS VAL ALA VAL THR ALA GLY ASN TYR SEQRES 9 A 184 TYR THR PHE THR VAL MET TYR ALA ASP ASP SER SER ALA SEQRES 10 A 184 LEU ILE HIS THR CYS LEU HIS LYS GLY ASN LYS ASP LEU SEQRES 11 A 184 GLY ASP LEU TYR ALA VAL LEU ASN ARG ASN LYS ASP ALA SEQRES 12 A 184 ALA ALA GLY ASP LYS VAL LYS SER ALA VAL SER ALA ALA SEQRES 13 A 184 THR LEU GLU PHE SER LYS PHE ILE SER THR LYS GLU ASN SEQRES 14 A 184 ASN CYS ALA TYR ASP ASN ASP SER LEU LYS SER LEU LEU SEQRES 15 A 184 THR LYS HET HEM A 185 43 HET NH3 A 186 1 HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETNAM NH3 AMMONIA HETSYN HEM HEME FORMUL 2 HEM C34 H32 FE N4 O4 FORMUL 3 NH3 H3 N FORMUL 4 HOH *351(H2 O) HELIX 1 1 ASN A 13 PHE A 18 1 6 HELIX 2 2 GLU A 32 VAL A 36 5 5 HELIX 3 3 GLY A 146 ALA A 156 1 11 HELIX 4 4 GLU A 159 PHE A 163 5 5 HELIX 5 5 LYS A 167 ASN A 170 5 4 HELIX 6 6 ASP A 174 LEU A 182 1 9 SHEET 1 A 7 VAL A 95 VAL A 97 0 SHEET 2 A 7 LYS A 81 VAL A 89 -1 N LYS A 88 O LYS A 96 SHEET 3 A 7 THR A 67 SER A 78 -1 N GLN A 75 O THR A 83 SHEET 4 A 7 LYS A 52 TYR A 60 -1 N LEU A 57 O ASP A 70 SHEET 5 A 7 CYS A 41 ALA A 49 -1 N GLY A 47 O LYS A 54 SHEET 6 A 7 ASN A 19 ASP A 30 -1 N TRP A 23 O LEU A 44 SHEET 7 A 7 ILE A 164 SER A 165 -1 O ILE A 164 N TYR A 28 SHEET 1 B 7 VAL A 95 VAL A 97 0 SHEET 2 B 7 LYS A 81 VAL A 89 -1 N LYS A 88 O LYS A 96 SHEET 3 B 7 ASN A 103 ALA A 112 -1 O TYR A 105 N ALA A 84 SHEET 4 B 7 SER A 116 LYS A 125 -1 O HIS A 124 N TYR A 104 SHEET 5 B 7 ASP A 132 ASN A 138 -1 O LEU A 137 N ALA A 117 SHEET 6 B 7 ASN A 19 ASP A 30 -1 N ASP A 27 O VAL A 136 SHEET 7 B 7 ILE A 164 SER A 165 -1 O ILE A 164 N TYR A 28 SSBOND 1 CYS A 2 CYS A 122 1555 1555 2.05 SSBOND 2 CYS A 41 CYS A 171 1555 1555 2.04 LINK NE2 HIS A 59 FE HEM A 185 1555 1555 1.98 LINK FE HEM A 185 N NH3 A 186 1555 1555 2.04 SITE 1 AC1 18 VAL A 25 VAL A 36 PRO A 37 TYR A 40 SITE 2 AC1 18 LEU A 57 HIS A 59 ASP A 70 PHE A 86 SITE 3 AC1 18 LYS A 88 TYR A 105 LEU A 123 LYS A 125 SITE 4 AC1 18 LYS A 128 LEU A 133 NH3 A 186 HOH A 291 SITE 5 AC1 18 HOH A 292 HOH A 433 SITE 1 AC2 3 LEU A 133 HEM A 185 HOH A 298 CRYST1 70.320 42.810 52.920 90.00 94.10 90.00 C 1 2 1 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 0.014221 0.000000 0.001019 0.00000 SCALE2 0.000000 0.023359 0.000000 0.00000 SCALE3 0.000000 0.000000 0.018945 0.00000