HEADER LIGAND BINDING PROTEIN 19-NOV-04 1Y21 TITLE CRYSTAL STRUCTURE OF CIMEX NITROPHORIN NO COMPLEX COMPND MOL_ID: 1; COMPND 2 MOLECULE: SALIVARY NITROPHORIN; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: CIMEX LECTULARIUS; SOURCE 3 ORGANISM_COMMON: BED BUG; SOURCE 4 ORGANISM_TAXID: 79782; SOURCE 5 ORGAN: SALIVARY GLANDS; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 7 EXPRESSION_SYSTEM_TAXID: 469008; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21DE3; SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET17B KEYWDS HEME PROTEIN; BETA-SANDWICH; NO CARRIER; FERROUS NO COMPLEX; S- KEYWDS 2 NITROSOCYSTEINE, LIGAND BINDING PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR A.WEICHSEL,E.M.MAES,J.F.ANDERSEN,J.G.VALENZUELA,T.K.SHOKHIREVA, AUTHOR 2 F.A.WALKER,W.R.MONTFORT REVDAT 5 23-AUG-23 1Y21 1 REMARK LINK REVDAT 4 29-FEB-12 1Y21 1 JRNL VERSN REVDAT 3 24-FEB-09 1Y21 1 VERSN REVDAT 2 18-JAN-05 1Y21 1 JRNL REMARK REVDAT 1 30-NOV-04 1Y21 0 SPRSDE 30-NOV-04 1Y21 1NZH JRNL AUTH A.WEICHSEL,E.M.MAES,J.F.ANDERSEN,J.G.VALENZUELA, JRNL AUTH 2 T.K.H.SHOKHIREVA,F.A.WALKER,W.R.MONTFORT JRNL TITL HEME-ASSISTED S-NITROSATION OF A PROXIMAL THIOLATE IN A JRNL TITL 2 NITRIC OXIDE TRANSPORT PROTEIN. JRNL REF PROC.NATL.ACAD.SCI.USA V. 102 594 2005 JRNL REFN ISSN 0027-8424 JRNL PMID 15637157 JRNL DOI 10.1073/PNAS.0406549102 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH A.WEICHSEL,J.F.ANDERSEN,S.A.ROBERTS REMARK 1 TITL NITRIC OXIDE BINDING TO NITROPHORIN 4 INDUCES COMPLETE REMARK 1 TITL 2 DISTAL POCKET BURIAL REMARK 1 REF NAT.STRUCT.MOL.BIOL. V. 7 551 2000 REMARK 1 REFN ISSN 1545-9993 REMARK 2 REMARK 2 RESOLUTION. 1.75 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.1.22 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) : 1.75 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 64.55 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 98.5 REMARK 3 NUMBER OF REFLECTIONS : 24549 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) : 0.170 REMARK 3 R VALUE (WORKING SET) : 0.168 REMARK 3 FREE R VALUE : 0.208 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.900 REMARK 3 FREE R VALUE TEST SET COUNT : 1255 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) : 1.75 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.80 REMARK 3 REFLECTION IN BIN (WORKING SET) : 1774 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 BIN R VALUE (WORKING SET) : 0.2790 REMARK 3 BIN FREE R VALUE SET COUNT : 97 REMARK 3 BIN FREE R VALUE : 0.3290 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2227 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 55 REMARK 3 SOLVENT ATOMS : 237 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 24.80 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 27.02 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -0.11000 REMARK 3 B22 (A**2) : 0.05000 REMARK 3 B33 (A**2) : -0.09000 REMARK 3 B12 (A**2) : 0.00000 REMARK 3 B13 (A**2) : -0.97000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.125 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.119 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.083 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 2.629 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.969 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.955 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 2335 ; 0.023 ; 0.022 REMARK 3 BOND LENGTHS OTHERS (A): 2018 ; 0.002 ; 0.020 REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 3180 ; 1.831 ; 2.007 REMARK 3 BOND ANGLES OTHERS (DEGREES): 4738 ; 0.912 ; 3.000 REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 279 ; 6.833 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): NULL ; NULL ; NULL REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 350 ; 0.116 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 2554 ; 0.009 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): 438 ; 0.004 ; 0.020 REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 421 ; 0.219 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): 2375 ; 0.251 ; 0.200 REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION OTHERS (A): 1382 ; 0.087 ; 0.200 REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 180 ; 0.187 ; 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): 15 ; 0.130 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): 42 ; 0.205 ; 0.200 REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 14 ; 0.168 ; 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): 1404 ; 1.383 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 2284 ; 2.386 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 931 ; 3.093 ; 3.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 896 ; 4.885 ; 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 : BABINET MODEL WITH MASK REMARK 3 PARAMETERS FOR MASK CALCULATION REMARK 3 VDW PROBE RADIUS : 1.40 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 1Y21 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 24-NOV-04. REMARK 100 THE DEPOSITION ID IS D_1000031016. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 01-AUG-02 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 8.6 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 RU300 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : OSMIC MIRRORS 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, CRYSTALCLEAR REMARK 200 (MSC/RIGAKU) REMARK 200 DATA SCALING SOFTWARE : D*TREK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 24549 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.750 REMARK 200 RESOLUTION RANGE LOW (A) : 64.550 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 98.7 REMARK 200 DATA REDUNDANCY : 3.300 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.04300 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) : 1.75 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.81 REMARK 200 COMPLETENESS FOR SHELL (%) : 98.4 REMARK 200 DATA REDUNDANCY IN SHELL : 2.70 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.24000 REMARK 200 FOR SHELL : 2.600 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS REMARK 200 SOFTWARE USED: MLPHARE REMARK 200 STARTING MODEL: PDB ENTRY 1NTF REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 32.70 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.84 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 4000, PH 8.6, VAPOR DIFFUSION, REMARK 280 HANGING DROP, TEMPERATURE 298K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,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 20.73850 REMARK 290 SMTRY3 2 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: MONOMER, THE BIOLOGICAL UNIT IS IDENTICAL TO THE ASYMMETRIC REMARK 300 UNIT 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 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 GLY A 1 REMARK 465 SER A 2 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 ASP A 160 CB - CG - OD2 ANGL. DEV. = 6.2 DEGREES REMARK 500 ASP A 188 CB - CG - OD1 ANGL. DEV. = 5.7 DEGREES REMARK 500 ARG A 272 NE - CZ - NH2 ANGL. DEV. = -3.7 DEGREES 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 300 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 NO A 298 N REMARK 620 2 HEM A 300 NA 97.6 REMARK 620 3 HEM A 300 NB 94.7 88.9 REMARK 620 4 HEM A 300 NC 91.1 170.8 93.4 REMARK 620 5 HEM A 300 ND 94.4 92.3 170.6 84.0 REMARK 620 6 NO A 298 O 25.1 72.6 91.6 116.2 97.6 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 NO A 296 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NO A 298 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM A 300 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE TRS A 301 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1NTF RELATED DB: PDB REMARK 900 THE SAME PROTEIN, AQUA COMPLEX. REMARK 900 RELATED ID: 1SI6 RELATED DB: PDB REMARK 900 THE SAME PROTEIN, 5-COORDINATE FERROUS NO COMPLEX, CYS 60 UNMODIFIED DBREF 1Y21 A 1 282 UNP O76745 O76745_9HEMI 21 302 SEQRES 1 A 282 GLY SER PRO PRO ALA GLN LEU SER VAL HIS THR VAL SER SEQRES 2 A 282 TRP ASN SER GLY HIS GLU ARG ALA PRO THR ASN LEU GLU SEQRES 3 A 282 GLU LEU LEU GLY LEU ASN SER GLY GLU THR PRO ASP VAL SEQRES 4 A 282 ILE ALA VAL ALA VAL GLN GLY PHE GLY PHE GLN THR ASP SEQRES 5 A 282 LYS PRO GLN GLN GLY PRO ALA CYS VAL LYS ASN PHE GLN SEQRES 6 A 282 SER LEU LEU THR SER LYS GLY TYR THR LYS LEU LYS ASN SEQRES 7 A 282 THR ILE THR GLU THR MET GLY LEU THR VAL TYR CYS LEU SEQRES 8 A 282 GLU LYS HIS LEU ASP GLN ASN THR LEU LYS ASN GLU THR SEQRES 9 A 282 ILE ILE VAL THR VAL ASP ASP GLN LYS LYS SER GLY GLY SEQRES 10 A 282 ILE VAL THR SER PHE THR ILE TYR ASN LYS ARG PHE SER SEQRES 11 A 282 PHE THR THR SER ARG MET SER ASP GLU ASP VAL THR SER SEQRES 12 A 282 THR ASN THR LYS TYR ALA TYR ASP THR ARG LEU ASP TYR SEQRES 13 A 282 SER LYS LYS ASP ASP PRO SER ASP PHE LEU PHE TRP ILE SEQRES 14 A 282 GLY ASP LEU ASN VAL ARG VAL GLU THR ASN ALA THR HIS SEQRES 15 A 282 ALA LYS SER LEU VAL ASP GLN ASN ASN ILE ASP GLY LEU SEQRES 16 A 282 MET ALA PHE ASP GLN LEU LYS LYS ALA LYS GLU GLN LYS SEQRES 17 A 282 LEU PHE ASP GLY TRP THR GLU PRO GLN VAL THR PHE LYS SEQRES 18 A 282 PRO THR TYR LYS PHE LYS PRO ASN THR ASP GLU TYR ASP SEQRES 19 A 282 LEU SER ALA THR PRO SER TRP THR ASP ARG ALA LEU TYR SEQRES 20 A 282 LYS SER GLY THR GLY LYS THR ILE GLN PRO LEU SER TYR SEQRES 21 A 282 ASN SER LEU THR ASN TYR LYS GLN THR GLU HIS ARG PRO SEQRES 22 A 282 VAL LEU ALA LYS PHE ARG VAL THR LEU HET NO A 296 2 HET NO A 298 2 HET HEM A 300 43 HET TRS A 301 8 HETNAM NO NITRIC OXIDE HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETNAM TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL HETSYN NO NITROGEN MONOXIDE HETSYN HEM HEME HETSYN TRS TRIS BUFFER FORMUL 2 NO 2(N O) FORMUL 4 HEM C34 H32 FE N4 O4 FORMUL 5 TRS C4 H12 N O3 1+ FORMUL 6 HOH *237(H2 O) HELIX 1 1 ASN A 24 LEU A 29 1 6 HELIX 2 2 GLN A 55 LYS A 71 1 17 HELIX 3 3 LYS A 93 LEU A 95 5 3 HELIX 4 4 ASP A 151 ASP A 155 5 5 HELIX 5 5 ASN A 179 GLN A 189 1 11 HELIX 6 6 ASN A 191 ALA A 197 1 7 HELIX 7 7 GLN A 200 GLN A 207 1 8 SHEET 1 A 6 TYR A 73 ILE A 80 0 SHEET 2 A 6 MET A 84 LEU A 91 -1 O CYS A 90 N THR A 74 SHEET 3 A 6 VAL A 39 GLY A 46 -1 N ILE A 40 O TYR A 89 SHEET 4 A 6 GLN A 6 GLY A 17 1 N VAL A 12 O ALA A 43 SHEET 5 A 6 VAL A 274 THR A 281 -1 O VAL A 280 N LEU A 7 SHEET 6 A 6 ILE A 255 SER A 262 -1 N LEU A 258 O LYS A 277 SHEET 1 B 5 GLU A 103 THR A 108 0 SHEET 2 B 5 GLY A 116 ILE A 124 -1 O SER A 121 N GLU A 103 SHEET 3 B 5 LYS A 127 ARG A 135 -1 O PHE A 129 N PHE A 122 SHEET 4 B 5 PHE A 165 GLY A 170 1 O ILE A 169 N THR A 132 SHEET 5 B 5 ARG A 244 LYS A 248 -1 O ARG A 244 N GLY A 170 LINK SG CYS A 60 N NO A 296 1555 1555 1.71 LINK N NO A 298 FE HEM A 300 1555 1555 1.85 LINK O NO A 298 FE HEM A 300 1555 1555 2.78 CISPEP 1 TYR A 224 LYS A 225 0 -2.21 SITE 1 AC1 4 ALA A 21 CYS A 60 PHE A 64 HEM A 300 SITE 1 AC2 2 VAL A 44 HEM A 300 SITE 1 AC3 22 TRP A 14 SER A 16 GLU A 19 ARG A 20 SITE 2 AC3 22 ALA A 21 VAL A 44 GLY A 48 PHE A 49 SITE 3 AC3 22 ASP A 52 GLY A 57 CYS A 60 VAL A 61 SITE 4 AC3 22 PHE A 64 GLN A 65 LYS A 75 ASN A 78 SITE 5 AC3 22 ILE A 80 THR A 87 TYR A 89 NO A 296 SITE 6 AC3 22 NO A 298 HOH A 412 SITE 1 AC4 4 THR A 264 HOH A 350 HOH A 469 HOH A 519 CRYST1 48.065 41.477 65.346 90.00 94.55 90.00 P 1 21 1 2 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 0.020805 0.000000 0.001656 0.00000 SCALE2 0.000000 0.024110 0.000000 0.00000 SCALE3 0.000000 0.000000 0.015352 0.00000