3B3N - Header Asymmetric Unit

HEADER OXIDOREDUCTASE 22-OCT-07 3B3N

TITLE STRUCTURE OF NEURONAL NOS HEME DOMAIN IN COMPLEX WITH A TITLE 2 INHIBITOR (+-)-N1-{CIS-4'-[(6"-AMINOPYRIDIN-2"-YL) TITLE 3 METHYL]PYRROLIDIN-3'-YL}ETHANE-1,2-DIAMINE

COMPND MOL_ID: 1; COMPND 2 MOLECULE: NITRIC-OXIDE SYNTHASE; COMPND 3 CHAIN: A, B; COMPND 4 FRAGMENT: RESIDUES 297-718; COMPND 5 SYNONYM: NOS TYPE I, NEURONAL NOS, N-NOS, NNOS, COMPND 6 CONSTITUTIVE NOS, NC-NOS, BNOS; COMPND 7 EC: 1.14.13.39; COMPND 8 ENGINEERED: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS; SOURCE 3 ORGANISM_COMMON: RAT; SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 5 EXPRESSION_SYSTEM_STRAIN: BL21(DE3); SOURCE 6 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 7 EXPRESSION_SYSTEM_PLASMID: PCWORI

KEYWDS NITRIC OXIDE SYNTHASE, HEME ENZYME, INHIBITOR, ALTERNATIVE KEYWDS 2 SPLICING, CALMODULIN-BINDING, CELL PROJECTION, FAD, FMN, KEYWDS 3 IRON, MEMBRANE, METAL-BINDING, NADP, OXIDOREDUCTASE

EXPDTA X-RAY DIFFRACTION

AUTHOR J.IGARASHI,H.LI,T.L.POULOS

REVDAT 2 24-FEB-09 3B3N 1 VERSN REVDAT 1 15-JUL-08 3B3N 0

JRNL AUTH H.JI,B.Z.STANTON,J.IGARASHI,H.LI,P.MARTASEK, JRNL AUTH 2 L.J.ROMAN,T.L.POULOS,R.B.SILVERMAN JRNL TITL MINIMAL PHARMACOPHORIC ELEMENTS AND FRAGMENT JRNL TITL 2 HOPPING, AN APPROACH DIRECTED AT MOLECULAR JRNL TITL 3 DIVERSITY AND ISOZYME SELECTIVITY. DESIGN OF JRNL TITL 4 SELECTIVE NEURONAL NITRIC OXIDE SYNTHASE JRNL TITL 5 INHIBITORS. JRNL REF J.AM.CHEM.SOC. V. 130 3900 2008 JRNL REFN ISSN 0002-7863 JRNL PMID 18321097 JRNL DOI 10.1021/JA0772041

REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH H.JI,B.Z.STANTON,J.IGARASHI,H.LI,P.MARTASEK, REMARK 1 AUTH 2 L.J.ROMAN,T.L.POULOS,R.B.SILVERMAN REMARK 1 TITL MINIMAL PHARMACOPHORIC ELEMENTS AND FRAGMENT REMARK 1 TITL 2 HOPPING, AN APPROACH DIRECTED AT MOLECULAR REMARK 1 TITL 3 DIVERSITY AND ISOZYME SELECTIVITY. DESIGN OF REMARK 1 TITL 4 SELECTIVE NEURONAL NITRIC OXIDE SYNTHASE INHIBITORS REMARK 1 REF TO BE PUBLISHED REMARK 1 REFN

REMARK 2 REMARK 2 RESOLUTION. 1.98 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) : 1.98 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 49.64 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 2516684.450 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 98.6 REMARK 3 NUMBER OF REFLECTIONS : 66359 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) : 0.230 REMARK 3 FREE R VALUE : 0.270 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT : 3301 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.005 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 10 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.98 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.05 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 91.00 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 5748 REMARK 3 BIN R VALUE (WORKING SET) : 0.3770 REMARK 3 BIN FREE R VALUE : 0.4160 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 4.90 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 293 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.024 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 6658 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 163 REMARK 3 SOLVENT ATOMS : 392 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 25.10 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 38.10 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 16.34000 REMARK 3 B22 (A**2) : 0.26000 REMARK 3 B33 (A**2) : -16.60000 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) : 0.29 REMARK 3 ESD FROM SIGMAA (A) : 0.40 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) : 0.36 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.49 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.009 REMARK 3 BOND ANGLES (DEGREES) : 1.50 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 22.50 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.09 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) : NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.36 REMARK 3 BSOL : 51.66 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 : HETERO. REMARK 3 PARAMETER FILE 4 : JI2.PAR REMARK 3 PARAMETER FILE 5 : NULL REMARK 3 TOPOLOGY FILE 1 : PROTEIN.TOP REMARK 3 TOPOLOGY FILE 2 : WATER.TOP REMARK 3 TOPOLOGY FILE 3 : HETERO. REMARK 3 TOPOLOGY FILE 4 : JI2.TOP REMARK 3 TOPOLOGY FILE 5 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL

REMARK 4 REMARK 4 3B3N COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 23-OCT-07. REMARK 100 THE RCSB ID CODE IS RCSB045037.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 13-FEB-04 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 6.0 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : ALS REMARK 200 BEAMLINE : 5.0.2 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.000 REMARK 200 MONOCHROMATOR : GRAPHITE REMARK 200 OPTICS : MIRRORS REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 4 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 66430 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.980 REMARK 200 RESOLUTION RANGE LOW (A) : 50.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 98.7 REMARK 200 DATA REDUNDANCY : 3.700 REMARK 200 R MERGE (I) : 0.05700 REMARK 200 R SYM (I) : 0.05700 REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 11.7000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.98 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.01 REMARK 200 COMPLETENESS FOR SHELL (%) : 90.1 REMARK 200 DATA REDUNDANCY IN SHELL : 2.70 REMARK 200 R MERGE FOR SHELL (I) : 0.46500 REMARK 200 R SYM FOR SHELL (I) : 0.46500 REMARK 200 <I/SIGMA(I)> FOR SHELL : 1.900 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS REMARK 200 SOFTWARE USED: CNS REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 49.42 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.43 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG3350, MES, AMMONIUM ACETATE, REMARK 280 GSH, PH 6.0, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 278K

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 26.02500 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 82.42000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 55.34500 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 82.42000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 26.02500 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 55.34500 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: DIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 9880 ANGSTROM**2 REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B 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 CYS A 297 REMARK 465 PRO A 298 REMARK 465 SER A 339 REMARK 465 GLN A 340 REMARK 465 HIS A 341 REMARK 465 THR A 342 REMARK 465 ARG A 343 REMARK 465 LYS A 344 REMARK 465 PRO A 345 REMARK 465 GLU A 346 REMARK 465 ASP A 347 REMARK 465 VAL A 348 REMARK 465 ARG A 349 REMARK 465 LYS A 717 REMARK 465 GLY A 718 REMARK 465 CYS B 297 REMARK 465 PRO B 298 REMARK 465 SER B 339 REMARK 465 GLN B 340 REMARK 465 HIS B 341 REMARK 465 THR B 342 REMARK 465 ARG B 343 REMARK 465 LYS B 344 REMARK 465 PRO B 345 REMARK 465 GLU B 346 REMARK 465 ASP B 347

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 O MET A 614 O HOH A 1065 2.01 REMARK 500 O LYS A 613 O HOH A 1064 2.09 REMARK 500 N GLU A 608 O HOH A 1063 2.17 REMARK 500 REMARK 500 REMARK: NULL 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 CYS A 326 CA - CB - SG ANGL. DEV. = 7.7 DEGREES REMARK 500 CYS B 326 CA - CB - SG ANGL. DEV. = 11.7 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 ARG A 371 29.66 -140.90 REMARK 500 THR A 393 -176.16 -170.94 REMARK 500 ALA A 412 93.27 -69.54 REMARK 500 THR A 466 -79.21 -115.96 REMARK 500 HIS A 470 46.96 -140.32 REMARK 500 ASP A 489 0.16 -59.59 REMARK 500 GLN A 507 -16.29 -48.86 REMARK 500 ASN A 527 16.06 47.55 REMARK 500 PRO A 537 109.27 -42.58 REMARK 500 PRO A 538 -37.42 -39.44 REMARK 500 PRO A 549 22.77 -78.22 REMARK 500 LYS A 550 -46.78 -157.78 REMARK 500 ARG A 603 -131.40 -117.65 REMARK 500 ASN A 605 68.82 28.80 REMARK 500 SER A 640 -72.10 -54.78 REMARK 500 TRP A 711 -4.18 -59.98 REMARK 500 THR A 713 -20.45 -147.17 REMARK 500 ASP B 309 -2.19 66.01 REMARK 500 SER B 392 -1.96 78.39 REMARK 500 THR B 466 -88.57 -124.22 REMARK 500 ARG B 603 -138.80 -124.94 REMARK 500 REMARK 500 REMARK: NULL

REMARK 525 REMARK 525 SOLVENT REMARK 525 REMARK 525 THE SOLVENT MOLECULES HAVE CHAIN IDENTIFIERS THAT REMARK 525 INDICATE THE POLYMER CHAIN WITH WHICH THEY ARE MOST REMARK 525 CLOSELY ASSOCIATED. THE REMARK LISTS ALL THE SOLVENT REMARK 525 MOLECULES WHICH ARE MORE THAN 5A AWAY FROM THE REMARK 525 NEAREST POLYMER CHAIN (M = MODEL NUMBER; REMARK 525 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE REMARK 525 NUMBER; I=INSERTION CODE): REMARK 525 REMARK 525 M RES CSSEQI REMARK 525 HOH A1030 DISTANCE = 7.18 ANGSTROMS

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 ZN A 900 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 CYS A 326 SG REMARK 620 2 CYS A 331 SG 114.7 REMARK 620 3 CYS B 326 SG 120.8 104.2 REMARK 620 4 CYS B 331 SG 102.1 100.9 112.6 REMARK 620 N 1 2 3

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ACT A 860 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ACT B 860 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 900 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM A 750 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H4B A 760 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE JI2 A 800 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM B 750 REMARK 800 SITE_IDENTIFIER: AC8 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H4B B 760 REMARK 800 SITE_IDENTIFIER: AC9 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE JI2 B 800

REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 3B3M RELATED DB: PDB REMARK 900 RELATED ID: 3B3O RELATED DB: PDB REMARK 900 RELATED ID: 3B3P RELATED DB: PDB

DBREF 3B3N A 297 718 UNP P29476 NOS1_RAT 297 718 DBREF 3B3N B 297 718 UNP P29476 NOS1_RAT 297 718

SEQRES 1 A 422 CYS PRO ARG PHE LEU LYS VAL LYS ASN TRP GLU THR ASP SEQRES 2 A 422 VAL VAL LEU THR ASP THR LEU HIS LEU LYS SER THR LEU SEQRES 3 A 422 GLU THR GLY CYS THR GLU HIS ILE CYS MET GLY SER ILE SEQRES 4 A 422 MET LEU PRO SER GLN HIS THR ARG LYS PRO GLU ASP VAL SEQRES 5 A 422 ARG THR LYS ASP GLN LEU PHE PRO LEU ALA LYS GLU PHE SEQRES 6 A 422 LEU ASP GLN TYR TYR SER SER ILE LYS ARG PHE GLY SER SEQRES 7 A 422 LYS ALA HIS MET ASP ARG LEU GLU GLU VAL ASN LYS GLU SEQRES 8 A 422 ILE GLU SER THR SER THR TYR GLN LEU LYS ASP THR GLU SEQRES 9 A 422 LEU ILE TYR GLY ALA LYS HIS ALA TRP ARG ASN ALA SER SEQRES 10 A 422 ARG CYS VAL GLY ARG ILE GLN TRP SER LYS LEU GLN VAL SEQRES 11 A 422 PHE ASP ALA ARG ASP CYS THR THR ALA HIS GLY MET PHE SEQRES 12 A 422 ASN TYR ILE CYS ASN HIS VAL LYS TYR ALA THR ASN LYS SEQRES 13 A 422 GLY ASN LEU ARG SER ALA ILE THR ILE PHE PRO GLN ARG SEQRES 14 A 422 THR ASP GLY LYS HIS ASP PHE ARG VAL TRP ASN SER GLN SEQRES 15 A 422 LEU ILE ARG TYR ALA GLY TYR LYS GLN PRO ASP GLY SER SEQRES 16 A 422 THR LEU GLY ASP PRO ALA ASN VAL GLN PHE THR GLU ILE SEQRES 17 A 422 CYS ILE GLN GLN GLY TRP LYS ALA PRO ARG GLY ARG PHE SEQRES 18 A 422 ASP VAL LEU PRO LEU LEU LEU GLN ALA ASN GLY ASN ASP SEQRES 19 A 422 PRO GLU LEU PHE GLN ILE PRO PRO GLU LEU VAL LEU GLU SEQRES 20 A 422 VAL PRO ILE ARG HIS PRO LYS PHE ASP TRP PHE LYS ASP SEQRES 21 A 422 LEU GLY LEU LYS TRP TYR GLY LEU PRO ALA VAL SER ASN SEQRES 22 A 422 MET LEU LEU GLU ILE GLY GLY LEU GLU PHE SER ALA CYS SEQRES 23 A 422 PRO PHE SER GLY TRP TYR MET GLY THR GLU ILE GLY VAL SEQRES 24 A 422 ARG ASP TYR CYS ASP ASN SER ARG TYR ASN ILE LEU GLU SEQRES 25 A 422 GLU VAL ALA LYS LYS MET ASP LEU ASP MET ARG LYS THR SEQRES 26 A 422 SER SER LEU TRP LYS ASP GLN ALA LEU VAL GLU ILE ASN SEQRES 27 A 422 ILE ALA VAL LEU TYR SER PHE GLN SER ASP LYS VAL THR SEQRES 28 A 422 ILE VAL ASP HIS HIS SER ALA THR GLU SER PHE ILE LYS SEQRES 29 A 422 HIS MET GLU ASN GLU TYR ARG CYS ARG GLY GLY CYS PRO SEQRES 30 A 422 ALA ASP TRP VAL TRP ILE VAL PRO PRO MET SER GLY SER SEQRES 31 A 422 ILE THR PRO VAL PHE HIS GLN GLU MET LEU ASN TYR ARG SEQRES 32 A 422 LEU THR PRO SER PHE GLU TYR GLN PRO ASP PRO TRP ASN SEQRES 33 A 422 THR HIS VAL TRP LYS GLY SEQRES 1 B 422 CYS PRO ARG PHE LEU LYS VAL LYS ASN TRP GLU THR ASP SEQRES 2 B 422 VAL VAL LEU THR ASP THR LEU HIS LEU LYS SER THR LEU SEQRES 3 B 422 GLU THR GLY CYS THR GLU HIS ILE CYS MET GLY SER ILE SEQRES 4 B 422 MET LEU PRO SER GLN HIS THR ARG LYS PRO GLU ASP VAL SEQRES 5 B 422 ARG THR LYS ASP GLN LEU PHE PRO LEU ALA LYS GLU PHE SEQRES 6 B 422 LEU ASP GLN TYR TYR SER SER ILE LYS ARG PHE GLY SER SEQRES 7 B 422 LYS ALA HIS MET ASP ARG LEU GLU GLU VAL ASN LYS GLU SEQRES 8 B 422 ILE GLU SER THR SER THR TYR GLN LEU LYS ASP THR GLU SEQRES 9 B 422 LEU ILE TYR GLY ALA LYS HIS ALA TRP ARG ASN ALA SER SEQRES 10 B 422 ARG CYS VAL GLY ARG ILE GLN TRP SER LYS LEU GLN VAL SEQRES 11 B 422 PHE ASP ALA ARG ASP CYS THR THR ALA HIS GLY MET PHE SEQRES 12 B 422 ASN TYR ILE CYS ASN HIS VAL LYS TYR ALA THR ASN LYS SEQRES 13 B 422 GLY ASN LEU ARG SER ALA ILE THR ILE PHE PRO GLN ARG SEQRES 14 B 422 THR ASP GLY LYS HIS ASP PHE ARG VAL TRP ASN SER GLN SEQRES 15 B 422 LEU ILE ARG TYR ALA GLY TYR LYS GLN PRO ASP GLY SER SEQRES 16 B 422 THR LEU GLY ASP PRO ALA ASN VAL GLN PHE THR GLU ILE SEQRES 17 B 422 CYS ILE GLN GLN GLY TRP LYS ALA PRO ARG GLY ARG PHE SEQRES 18 B 422 ASP VAL LEU PRO LEU LEU LEU GLN ALA ASN GLY ASN ASP SEQRES 19 B 422 PRO GLU LEU PHE GLN ILE PRO PRO GLU LEU VAL LEU GLU SEQRES 20 B 422 VAL PRO ILE ARG HIS PRO LYS PHE ASP TRP PHE LYS ASP SEQRES 21 B 422 LEU GLY LEU LYS TRP TYR GLY LEU PRO ALA VAL SER ASN SEQRES 22 B 422 MET LEU LEU GLU ILE GLY GLY LEU GLU PHE SER ALA CYS SEQRES 23 B 422 PRO PHE SER GLY TRP TYR MET GLY THR GLU ILE GLY VAL SEQRES 24 B 422 ARG ASP TYR CYS ASP ASN SER ARG TYR ASN ILE LEU GLU SEQRES 25 B 422 GLU VAL ALA LYS LYS MET ASP LEU ASP MET ARG LYS THR SEQRES 26 B 422 SER SER LEU TRP LYS ASP GLN ALA LEU VAL GLU ILE ASN SEQRES 27 B 422 ILE ALA VAL LEU TYR SER PHE GLN SER ASP LYS VAL THR SEQRES 28 B 422 ILE VAL ASP HIS HIS SER ALA THR GLU SER PHE ILE LYS SEQRES 29 B 422 HIS MET GLU ASN GLU TYR ARG CYS ARG GLY GLY CYS PRO SEQRES 30 B 422 ALA ASP TRP VAL TRP ILE VAL PRO PRO MET SER GLY SER SEQRES 31 B 422 ILE THR PRO VAL PHE HIS GLN GLU MET LEU ASN TYR ARG SEQRES 32 B 422 LEU THR PRO SER PHE GLU TYR GLN PRO ASP PRO TRP ASN SEQRES 33 B 422 THR HIS VAL TRP LYS GLY

HET ACT A 860 4 HET ZN A 900 1 HET ACT B 860 4 HET HEM A 750 43 HET H4B A 760 17 HET JI2 A 800 17 HET HEM B 750 43 HET H4B B 760 17 HET JI2 B 800 17

HETNAM ACT ACETATE ION HETNAM ZN ZINC ION HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETNAM H4B 5,6,7,8-TETRAHYDROBIOPTERIN HETNAM JI2 N-{(3S,4S)-4-[(6-AMINOPYRIDIN-2-YL)METHYL]PYRROLIDIN- HETNAM 2 JI2 3-YL}ETHANE-1,2-DIAMINE

HETSYN HEM HEME HETSYN JI2 (+-)-N1-{CIS-4'-[(6"-AMINOPYRIDIN-2"-YL) HETSYN 2 JI2 METHYL]PYRROLIDIN-3'-YL}ETHANE-1,2-DIAMINE

FORMUL 3 ACT 2(C2 H3 O2 1-) FORMUL 4 ZN ZN 2+ FORMUL 6 HEM 2(C34 H32 FE N4 O4) FORMUL 7 H4B 2(C9 H15 N5 O3) FORMUL 8 JI2 2(C12 H21 N5) FORMUL 12 HOH *392(H2 O)

HELIX 1 1 THR A 315 SER A 320 5 6 HELIX 2 2 THR A 350 ILE A 369 1 20 HELIX 3 3 SER A 374 SER A 392 1 19 HELIX 4 4 LYS A 397 ASN A 411 1 15 HELIX 5 5 GLY A 417 TRP A 421 5 5 HELIX 6 6 THR A 434 ASN A 451 1 18 HELIX 7 7 LYS A 452 ASN A 454 5 3 HELIX 8 8 ASN A 498 GLN A 507 1 10 HELIX 9 9 PRO A 537 VAL A 541 5 5 HELIX 10 10 TRP A 553 GLY A 558 5 6 HELIX 11 11 MET A 589 VAL A 595 1 7 HELIX 12 12 VAL A 595 ASP A 600 1 6 HELIX 13 13 ILE A 606 MET A 614 1 9 HELIX 14 14 LYS A 620 SER A 623 5 4 HELIX 15 15 LEU A 624 ASP A 644 1 21 HELIX 16 16 ASP A 650 GLY A 670 1 21 HELIX 17 17 ASP A 675 VAL A 680 1 6 HELIX 18 18 SER A 684 GLN A 693 5 10 HELIX 19 19 ASP A 709 THR A 713 5 5 HELIX 20 20 THR B 315 SER B 320 5 6 HELIX 21 21 THR B 350 ILE B 369 1 20 HELIX 22 22 SER B 374 SER B 392 1 19 HELIX 23 23 LYS B 397 ASN B 411 1 15 HELIX 24 24 GLY B 417 TRP B 421 5 5 HELIX 25 25 THR B 434 ASN B 451 1 18 HELIX 26 26 LYS B 452 ASN B 454 5 3 HELIX 27 27 ASN B 498 GLN B 508 1 11 HELIX 28 28 PRO B 537 VAL B 541 5 5 HELIX 29 29 PHE B 554 GLY B 558 5 5 HELIX 30 30 GLY B 590 VAL B 595 1 6 HELIX 31 31 VAL B 595 ASP B 600 1 6 HELIX 32 32 ILE B 606 ASP B 615 1 10 HELIX 33 33 LYS B 620 SER B 623 5 4 HELIX 34 34 LEU B 624 ASP B 644 1 21 HELIX 35 35 ASP B 650 GLY B 670 1 21 HELIX 36 36 ASP B 675 VAL B 680 1 6 HELIX 37 37 SER B 684 GLN B 693 5 10 HELIX 38 38 ASP B 709 THR B 713 5 5

SHEET 1 A 2 LEU A 301 LYS A 304 0 SHEET 2 A 2 VAL A 311 ASP A 314 -1 O ASP A 314 N LEU A 301 SHEET 1 B 3 GLN A 425 ASP A 428 0 SHEET 2 B 3 ALA A 458 ILE A 461 1 O ILE A 459 N PHE A 427 SHEET 3 B 3 PHE A 584 SER A 585 -1 O SER A 585 N ALA A 458 SHEET 1 C 3 ARG A 473 VAL A 474 0 SHEET 2 C 3 LEU A 522 GLN A 525 -1 O GLN A 525 N ARG A 473 SHEET 3 C 3 GLU A 532 PHE A 534 -1 O GLU A 532 N LEU A 524 SHEET 1 D 2 GLY A 484 LYS A 486 0 SHEET 2 D 2 THR A 492 GLY A 494 -1 O LEU A 493 N TYR A 485 SHEET 1 E 2 GLU A 543 PRO A 545 0 SHEET 2 E 2 LYS A 560 TYR A 562 -1 O TRP A 561 N VAL A 544 SHEET 1 F 3 LEU A 577 PHE A 579 0 SHEET 2 F 3 LEU A 571 ILE A 574 -1 N ILE A 574 O LEU A 577 SHEET 3 F 3 SER A 703 GLU A 705 -1 O SER A 703 N GLU A 573 SHEET 1 G 2 LEU B 301 LYS B 304 0 SHEET 2 G 2 VAL B 311 ASP B 314 -1 O ASP B 314 N LEU B 301 SHEET 1 H 3 GLN B 425 ASP B 428 0 SHEET 2 H 3 ALA B 458 ILE B 461 1 O ILE B 459 N PHE B 427 SHEET 3 H 3 PHE B 584 SER B 585 -1 O SER B 585 N ALA B 458 SHEET 1 I 3 ARG B 473 VAL B 474 0 SHEET 2 I 3 LEU B 522 GLN B 525 -1 O GLN B 525 N ARG B 473 SHEET 3 I 3 GLU B 532 PHE B 534 -1 O PHE B 534 N LEU B 522 SHEET 1 J 2 GLY B 484 LYS B 486 0 SHEET 2 J 2 THR B 492 GLY B 494 -1 O LEU B 493 N TYR B 485 SHEET 1 K 2 GLU B 543 PRO B 545 0 SHEET 2 K 2 LYS B 560 TYR B 562 -1 O TRP B 561 N VAL B 544 SHEET 1 L 3 LEU B 577 PHE B 579 0 SHEET 2 L 3 LEU B 571 ILE B 574 -1 N LEU B 572 O PHE B 579 SHEET 3 L 3 SER B 703 GLU B 705 -1 O GLU B 705 N LEU B 571 SHEET 1 M 2 TYR B 588 MET B 589 0 SHEET 2 M 2 ILE B 648 VAL B 649 1 O VAL B 649 N TYR B 588

LINK SG CYS A 326 ZN ZN A 900 1555 1555 2.31 LINK SG CYS A 331 ZN ZN A 900 1555 1555 2.35 LINK SG CYS A 415 FE HEM A 750 1555 1555 2.23 LINK SG CYS B 326 ZN ZN A 900 1555 1555 2.32 LINK SG CYS B 331 ZN ZN A 900 1555 1555 2.35 LINK SG CYS B 415 FE HEM B 750 1555 1555 2.26

CISPEP 1 THR A 701 PRO A 702 0 -0.09 CISPEP 2 THR B 701 PRO B 702 0 -0.19

SITE 1 AC1 2 TRP A 587 SER A 657 SITE 1 AC2 3 GLN B 420 TRP B 587 HOH B1164 SITE 1 AC3 4 CYS A 326 CYS A 331 CYS B 326 CYS B 331 SITE 1 AC4 12 TRP A 409 CYS A 415 SER A 457 PHE A 584 SITE 2 AC4 12 SER A 585 TRP A 587 GLU A 592 TRP A 678 SITE 3 AC4 12 TYR A 706 HOH A 907 HOH A 911 HOH A 940 SITE 1 AC5 14 SER A 334 MET A 336 ARG A 596 TRP A 678 SITE 2 AC5 14 HOH A 905 HOH A 911 HOH A 913 HOH A 944 SITE 3 AC5 14 HOH A1021 TRP B 676 PHE B 691 HIS B 692 SITE 4 AC5 14 GLN B 693 GLU B 694 SITE 1 AC6 6 GLN A 478 TRP A 587 TYR A 588 GLU A 592 SITE 2 AC6 6 HOH A 909 HOH A1024 SITE 1 AC7 13 TRP B 409 ARG B 414 CYS B 415 PHE B 584 SITE 2 AC7 13 SER B 585 TRP B 587 GLU B 592 TRP B 678 SITE 3 AC7 13 TYR B 706 HOH B1065 HOH B1072 HOH B1073 SITE 4 AC7 13 HOH B1125 SITE 1 AC8 11 TRP A 676 PHE A 691 HIS A 692 GLU A 694 SITE 2 AC8 11 SER B 334 ARG B 596 TRP B 678 HOH B1045 SITE 3 AC8 11 HOH B1062 HOH B1073 HOH B1089 SITE 1 AC9 6 GLN B 478 TRP B 587 TYR B 588 GLU B 592 SITE 2 AC9 6 HOH B1052 HOH B1118

CRYST1 52.050 110.690 164.840 90.00 90.00 90.00 P 21 21 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 0.019212 0.000000 0.000000 0.00000

SCALE2 0.000000 0.009034 0.000000 0.00000

SCALE3 0.000000 0.000000 0.006066 0.00000