HEADER OXIDOREDUCTASE 10-AUG-07 2QX6 TITLE CRYSTAL STRUCTURE OF QUINONE REDUCTASE II COMPND MOL_ID: 1; COMPND 2 MOLECULE: RIBOSYLDIHYDRONICOTINAMIDE DEHYDROGENASE [QUINONE]; COMPND 3 CHAIN: A, B; COMPND 4 SYNONYM: NRH DEHYDROGENASE [QUINONE] 2, QUINONE REDUCTASE 2, QR2, COMPND 5 NRH:QUINONE OXIDOREDUCTASE 2; COMPND 6 EC: 1.10.99.2; COMPND 7 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: NQO2, NMOR2; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21 (DE3); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET23D KEYWDS OXIDOREDUCTASE, FAD, FLAVOPROTEIN, METAL-BINDING EXPDTA X-RAY DIFFRACTION AUTHOR B.CALAMINI,B.D.SANTARSIERO,J.A.BOUTIN,A.D.MESECAR REVDAT 4 21-FEB-24 2QX6 1 REMARK REVDAT 3 13-MAR-13 2QX6 1 HETSYN VERSN REVDAT 2 24-FEB-09 2QX6 1 VERSN REVDAT 1 09-SEP-08 2QX6 0 JRNL AUTH B.CALAMINI,B.D.SANTARSIERO,J.A.BOUTIN,A.D.MESECAR JRNL TITL KINETIC, THERMODYNAMIC AND X-RAY STRUCTURAL INSIGHTS INTO JRNL TITL 2 THE INTERACTION OF MELATONIN AND ANALOGUES WITH QUINONE JRNL TITL 3 REDUCTASE 2. JRNL REF BIOCHEM.J. V. 413 81 2008 JRNL REFN ISSN 0264-6021 JRNL PMID 18254726 JRNL DOI 10.1042/BJ20071373 REMARK 2 REMARK 2 RESOLUTION. 1.75 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 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 : NULL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.75 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 20.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 97.3 REMARK 3 NUMBER OF REFLECTIONS : 50120 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING SET) : 0.191 REMARK 3 FREE R VALUE : 0.220 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.900 REMARK 3 FREE R VALUE TEST SET COUNT : 2506 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : NULL REMARK 3 BIN RESOLUTION RANGE LOW (A) : NULL REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 3648 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 142 REMARK 3 SOLVENT ATOMS : 331 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 27.18 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 27.04 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 6.54700 REMARK 3 B22 (A**2) : 2.09000 REMARK 3 B33 (A**2) : -8.63700 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) : NULL REMARK 3 ESD FROM SIGMAA (A) : NULL REMARK 3 LOW RESOLUTION CUTOFF (A) : NULL REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.019 REMARK 3 BOND ANGLES (DEGREES) : NULL REMARK 3 DIHEDRAL ANGLES (DEGREES) : 22.30 REMARK 3 IMPROPER ANGLES (DEGREES) : 0.990 REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : NULL 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 : NULL REMARK 3 KSOL : NULL REMARK 3 BSOL : 62.59 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 : CNS_TOPPAR:PROTEIN_REP.PARAM REMARK 3 PARAMETER FILE 2 : CNS_TOPPAR:WATER_REP.PARAM REMARK 3 PARAMETER FILE 3 : CNS_TOPPAR:ION.PARAM REMARK 3 PARAMETER FILE 4 : FAD.PAR REMARK 3 PARAMETER FILE 5 : MEL.PAR REMARK 3 PARAMETER FILE 6 : NULL REMARK 3 TOPOLOGY FILE 1 : NULL REMARK 3 TOPOLOGY FILE 2 : NULL REMARK 3 TOPOLOGY FILE 3 : NULL REMARK 3 TOPOLOGY FILE 4 : NULL REMARK 3 TOPOLOGY FILE 5 : NULL REMARK 3 TOPOLOGY FILE 6 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: THE RESIDUE 182 IN CHAIN A IS REMARK 3 DISORDERED. THE DISTANCES BETWEEN THIS RESIDUE AND ITS NEIGHBORS REMARK 3 ARE LONGER THAN THE NORMAL RANGE FOR PEPTIDE BONDS REMARK 4 REMARK 4 2QX6 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 29-OCT-07. REMARK 100 THE DEPOSITION ID IS D_1000044156. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 30-JUN-06 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 : 22-BM REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.9 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : MARMOSAIC 225 MM CCD REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-2000 REMARK 200 DATA SCALING SOFTWARE : XSCALE REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 50120 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.750 REMARK 200 RESOLUTION RANGE LOW (A) : 20.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 93.5 REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : 0.07200 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 8.6200 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) : 1.86 REMARK 200 COMPLETENESS FOR SHELL (%) : 71.5 REMARK 200 DATA REDUNDANCY IN SHELL : 29.10 REMARK 200 R MERGE FOR SHELL (I) : 0.63200 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 1.200 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: NULL REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 49.37 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.43 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: BISTRIS, NACL, AMMONIUM SULFATE, FAD, REMARK 280 DTT, MELATONIN, GLYCEROL, PH 6.5, VAPOR DIFFUSION, HANGING DROP, REMARK 280 TEMPERATURE 298K 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 28.26500 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 53.13700 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 41.80850 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 53.13700 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 28.26500 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 41.80850 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: BIOLOGICAL UNIT IS A DIMER OF CHAINS A AND B IN THE REMARK 300 ASYMMETRIC 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: DIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 8130 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 17750 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -21.0 KCAL/MOL 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 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS 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,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3) 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 RES CSSEQI ATM2 DEVIATION REMARK 500 LYS A 182 N LYS A 182 CA 0.171 REMARK 500 LYS A 182 N LYS A 182 CA 0.148 REMARK 500 LYS A 182 CA LYS A 182 CB 0.184 REMARK 500 LYS A 182 CA LYS A 182 CB 0.173 REMARK 500 LYS A 182 CB LYS A 182 CG 0.320 REMARK 500 LYS A 182 CB LYS A 182 CG 0.330 REMARK 500 LYS A 182 CG LYS A 182 CD 0.320 REMARK 500 LYS A 182 CG LYS A 182 CD 0.338 REMARK 500 LYS A 182 CD LYS A 182 CE 0.334 REMARK 500 LYS A 182 CD LYS A 182 CE 0.333 REMARK 500 LYS A 182 CE LYS A 182 NZ 0.222 REMARK 500 LYS A 182 CE LYS A 182 NZ 0.224 REMARK 500 LYS A 182 CA LYS A 182 C 0.177 REMARK 500 LYS A 182 CA LYS A 182 C 0.173 REMARK 500 LYS A 182 C LYS A 182 O 0.138 REMARK 500 LYS A 182 C LYS A 182 O 0.137 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 TYR A 132 -127.34 59.73 REMARK 500 TYR A 155 51.98 -95.96 REMARK 500 ALA A 191 61.43 32.32 REMARK 500 ASN B 61 79.46 -155.13 REMARK 500 ASP B 127 -173.67 -175.23 REMARK 500 TYR B 132 -132.18 57.68 REMARK 500 TYR B 155 41.07 -94.13 REMARK 500 ALA B 191 67.18 31.49 REMARK 500 ALA B 195 162.30 -47.81 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 ZN A 231 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 173 ND1 REMARK 620 2 HIS A 177 ND1 101.8 REMARK 620 3 CYS A 222 O 106.7 98.4 REMARK 620 4 CYS A 222 SG 129.4 116.0 100.1 REMARK 620 N 1 2 3 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 ZN B 231 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS B 173 ND1 REMARK 620 2 HIS B 177 ND1 114.0 REMARK 620 3 CYS B 222 O 107.2 93.2 REMARK 620 4 CYS B 222 SG 125.3 108.9 102.4 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 ZN A 231 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN B 231 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FAD A 232 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FAD B 232 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ML1 B 233 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ML1 A 233 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1SG0 RELATED DB: PDB REMARK 900 RELATED ID: 2QX4 RELATED DB: PDB REMARK 900 RELATED ID: 2QX8 RELATED DB: PDB REMARK 900 RELATED ID: 2QX9 RELATED DB: PDB DBREF 2QX6 A 1 230 UNP P16083 NQO2_HUMAN 2 231 DBREF 2QX6 B 1 230 UNP P16083 NQO2_HUMAN 2 231 SEQRES 1 A 230 ALA GLY LYS LYS VAL LEU ILE VAL TYR ALA HIS GLN GLU SEQRES 2 A 230 PRO LYS SER PHE ASN GLY SER LEU LYS ASN VAL ALA VAL SEQRES 3 A 230 ASP GLU LEU SER ARG GLN GLY CYS THR VAL THR VAL SER SEQRES 4 A 230 ASP LEU TYR ALA MET ASN PHE GLU PRO ARG ALA THR ASP SEQRES 5 A 230 LYS ASP ILE THR GLY THR LEU SER ASN PRO GLU VAL PHE SEQRES 6 A 230 ASN TYR GLY VAL GLU THR HIS GLU ALA TYR LYS GLN ARG SEQRES 7 A 230 SER LEU ALA SER ASP ILE THR ASP GLU GLN LYS LYS VAL SEQRES 8 A 230 ARG GLU ALA ASP LEU VAL ILE PHE GLN PHE PRO LEU TYR SEQRES 9 A 230 TRP PHE SER VAL PRO ALA ILE LEU LYS GLY TRP MET ASP SEQRES 10 A 230 ARG VAL LEU CYS GLN GLY PHE ALA PHE ASP ILE PRO GLY SEQRES 11 A 230 PHE TYR ASP SER GLY LEU LEU GLN GLY LYS LEU ALA LEU SEQRES 12 A 230 LEU SER VAL THR THR GLY GLY THR ALA GLU MET TYR THR SEQRES 13 A 230 LYS THR GLY VAL ASN GLY ASP SER ARG TYR PHE LEU TRP SEQRES 14 A 230 PRO LEU GLN HIS GLY THR LEU HIS PHE CYS GLY PHE LYS SEQRES 15 A 230 VAL LEU ALA PRO GLN ILE SER PHE ALA PRO GLU ILE ALA SEQRES 16 A 230 SER GLU GLU GLU ARG LYS GLY MET VAL ALA ALA TRP SER SEQRES 17 A 230 GLN ARG LEU GLN THR ILE TRP LYS GLU GLU PRO ILE PRO SEQRES 18 A 230 CYS THR ALA HIS TRP HIS PHE GLY GLN SEQRES 1 B 230 ALA GLY LYS LYS VAL LEU ILE VAL TYR ALA HIS GLN GLU SEQRES 2 B 230 PRO LYS SER PHE ASN GLY SER LEU LYS ASN VAL ALA VAL SEQRES 3 B 230 ASP GLU LEU SER ARG GLN GLY CYS THR VAL THR VAL SER SEQRES 4 B 230 ASP LEU TYR ALA MET ASN PHE GLU PRO ARG ALA THR ASP SEQRES 5 B 230 LYS ASP ILE THR GLY THR LEU SER ASN PRO GLU VAL PHE SEQRES 6 B 230 ASN TYR GLY VAL GLU THR HIS GLU ALA TYR LYS GLN ARG SEQRES 7 B 230 SER LEU ALA SER ASP ILE THR ASP GLU GLN LYS LYS VAL SEQRES 8 B 230 ARG GLU ALA ASP LEU VAL ILE PHE GLN PHE PRO LEU TYR SEQRES 9 B 230 TRP PHE SER VAL PRO ALA ILE LEU LYS GLY TRP MET ASP SEQRES 10 B 230 ARG VAL LEU CYS GLN GLY PHE ALA PHE ASP ILE PRO GLY SEQRES 11 B 230 PHE TYR ASP SER GLY LEU LEU GLN GLY LYS LEU ALA LEU SEQRES 12 B 230 LEU SER VAL THR THR GLY GLY THR ALA GLU MET TYR THR SEQRES 13 B 230 LYS THR GLY VAL ASN GLY ASP SER ARG TYR PHE LEU TRP SEQRES 14 B 230 PRO LEU GLN HIS GLY THR LEU HIS PHE CYS GLY PHE LYS SEQRES 15 B 230 VAL LEU ALA PRO GLN ILE SER PHE ALA PRO GLU ILE ALA SEQRES 16 B 230 SER GLU GLU GLU ARG LYS GLY MET VAL ALA ALA TRP SER SEQRES 17 B 230 GLN ARG LEU GLN THR ILE TRP LYS GLU GLU PRO ILE PRO SEQRES 18 B 230 CYS THR ALA HIS TRP HIS PHE GLY GLN HET FAD A 232 53 HET ML1 A 233 17 HET ZN A 231 1 HET FAD B 232 53 HET ML1 B 233 17 HET ZN B 231 1 HETNAM FAD FLAVIN-ADENINE DINUCLEOTIDE HETNAM ML1 N-[2-(5-METHOXY-1H-INDOL-3-YL)ETHYL]ACETAMIDE HETNAM ZN ZINC ION HETSYN ML1 MELATONIN FORMUL 3 FAD 2(C27 H33 N9 O15 P2) FORMUL 4 ML1 2(C13 H16 N2 O2) FORMUL 5 ZN 2(ZN 2+) FORMUL 9 HOH *331(H2 O) HELIX 1 1 SER A 16 GLN A 32 1 17 HELIX 2 2 THR A 51 ILE A 55 5 5 HELIX 3 3 ASN A 66 ARG A 78 1 13 HELIX 4 4 ALA A 81 ALA A 94 1 14 HELIX 5 5 PRO A 109 LEU A 120 1 12 HELIX 6 6 PHE A 131 GLY A 135 5 5 HELIX 7 7 ASP A 163 HIS A 173 1 11 HELIX 8 8 SER A 196 THR A 213 1 18 HELIX 9 9 ILE A 214 GLU A 217 5 4 HELIX 10 10 THR A 223 GLY A 229 1 7 HELIX 11 11 SER B 16 GLN B 32 1 17 HELIX 12 12 THR B 51 ILE B 55 5 5 HELIX 13 13 ASN B 66 GLN B 77 1 12 HELIX 14 14 ALA B 81 ALA B 94 1 14 HELIX 15 15 PRO B 109 LEU B 120 1 12 HELIX 16 16 PHE B 131 GLY B 135 5 5 HELIX 17 17 THR B 151 THR B 156 5 6 HELIX 18 18 ASP B 163 HIS B 173 1 11 HELIX 19 19 LEU B 176 GLY B 180 5 5 HELIX 20 20 SER B 196 THR B 213 1 18 HELIX 21 21 ILE B 214 GLU B 217 5 4 HELIX 22 22 THR B 223 GLY B 229 1 7 SHEET 1 A 5 THR A 35 ASP A 40 0 SHEET 2 A 5 LYS A 4 TYR A 9 1 N ILE A 7 O SER A 39 SHEET 3 A 5 LEU A 96 PRO A 102 1 O ILE A 98 N LEU A 6 SHEET 4 A 5 LEU A 141 THR A 147 1 O SER A 145 N PHE A 99 SHEET 5 A 5 GLN A 187 SER A 189 1 O SER A 189 N VAL A 146 SHEET 1 B 5 THR B 35 ASP B 40 0 SHEET 2 B 5 LYS B 4 TYR B 9 1 N ILE B 7 O SER B 39 SHEET 3 B 5 LEU B 96 PRO B 102 1 O ILE B 98 N VAL B 8 SHEET 4 B 5 LEU B 141 THR B 147 1 O SER B 145 N PHE B 99 SHEET 5 B 5 LYS B 182 VAL B 183 1 O LYS B 182 N ALA B 142 SHEET 1 C 5 THR B 35 ASP B 40 0 SHEET 2 C 5 LYS B 4 TYR B 9 1 N ILE B 7 O SER B 39 SHEET 3 C 5 LEU B 96 PRO B 102 1 O ILE B 98 N VAL B 8 SHEET 4 C 5 LEU B 141 THR B 147 1 O SER B 145 N PHE B 99 SHEET 5 C 5 GLN B 187 SER B 189 1 O SER B 189 N VAL B 146 LINK ND1 HIS A 173 ZN ZN A 231 1555 1555 2.06 LINK ND1 HIS A 177 ZN ZN A 231 1555 1555 2.12 LINK O CYS A 222 ZN ZN A 231 1555 1555 2.21 LINK SG CYS A 222 ZN ZN A 231 1555 1555 2.37 LINK ND1 HIS B 173 ZN ZN B 231 1555 1555 2.21 LINK ND1 HIS B 177 ZN ZN B 231 1555 1555 2.18 LINK O CYS B 222 ZN ZN B 231 1555 1555 2.29 LINK SG CYS B 222 ZN ZN B 231 1555 1555 2.24 CISPEP 1 ILE A 128 PRO A 129 0 0.24 CISPEP 2 ILE B 128 PRO B 129 0 0.34 SITE 1 AC1 3 HIS A 173 HIS A 177 CYS A 222 SITE 1 AC2 3 HIS B 173 HIS B 177 CYS B 222 SITE 1 AC3 27 HIS A 11 LYS A 15 SER A 16 PHE A 17 SITE 2 AC3 27 ASN A 18 SER A 20 PRO A 102 LEU A 103 SITE 3 AC3 27 TYR A 104 TRP A 105 PHE A 106 THR A 147 SITE 4 AC3 27 THR A 148 GLY A 149 GLY A 150 TYR A 155 SITE 5 AC3 27 PRO A 192 GLU A 193 GLU A 197 ARG A 200 SITE 6 AC3 27 LYS A 201 HOH A 295 HOH A 345 HOH A 404 SITE 7 AC3 27 ASN B 66 TYR B 67 ASP B 117 SITE 1 AC4 28 ASN A 66 TYR A 67 ASP A 117 HOH A 287 SITE 2 AC4 28 HOH A 367 HOH A 380 HIS B 11 LYS B 15 SITE 3 AC4 28 SER B 16 PHE B 17 ASN B 18 SER B 20 SITE 4 AC4 28 PRO B 102 LEU B 103 TYR B 104 TRP B 105 SITE 5 AC4 28 PHE B 106 THR B 147 THR B 148 GLY B 149 SITE 6 AC4 28 GLY B 150 TYR B 155 PRO B 192 GLU B 193 SITE 7 AC4 28 GLU B 197 ARG B 200 LYS B 201 HOH B 524 SITE 1 AC5 5 TRP A 105 GLY A 149 PHE B 126 PHE B 178 SITE 2 AC5 5 HOH B 507 SITE 1 AC6 7 PHE A 126 ILE A 128 PHE A 178 HOH A 413 SITE 2 AC6 7 TRP B 105 PHE B 106 GLY B 150 CRYST1 56.530 83.617 106.274 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 0.017690 0.000000 0.000000 0.00000 SCALE2 0.000000 0.011959 0.000000 0.00000 SCALE3 0.000000 0.000000 0.009410 0.00000