HEADER METAL BINDING PROTEIN/INHIBITOR 03-SEP-15 5DKQ TITLE CRYSTAL STRUCTURE OF CALCIUM-LOADED S100B BOUND TO SBI4214 COMPND MOL_ID: 1; COMPND 2 MOLECULE: PROTEIN S100-B; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: S-100 PROTEIN BETA CHAIN,S-100 PROTEIN SUBUNIT BETA,S100 COMPND 5 CALCIUM-BINDING PROTEIN B; COMPND 6 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: BOS TAURUS; SOURCE 3 ORGANISM_COMMON: BOVINE; SOURCE 4 ORGANISM_TAXID: 9913; SOURCE 5 GENE: S100B; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS MALIGNANT MELANOMA, CALCIUM BINDING, COVALENT INHIBITOR, METAL KEYWDS 2 BINDING PROTEIN-INHIBITOR COMPLEX EXPDTA X-RAY DIFFRACTION AUTHOR M.C.CAVALIER,M.I.ANSARI,A.D.PIERCE,P.T.WILDER,L.E.MCKNIGHT,E.P.RAMAN, AUTHOR 2 D.B.NEAU,P.BEZAWADA,M.J.ALASADY,K.M.VARNEY,E.A.TOTH,A.D.MACKERELL AUTHOR 3 JR.,A.COOP,D.J.WEBER REVDAT 5 27-SEP-23 5DKQ 1 REMARK REVDAT 4 04-DEC-19 5DKQ 1 REMARK REVDAT 3 27-SEP-17 5DKQ 1 JRNL REMARK REVDAT 2 10-FEB-16 5DKQ 1 JRNL REVDAT 1 20-JAN-16 5DKQ 0 JRNL AUTH M.C.CAVALIER,M.I.ANSARI,A.D.PIERCE,P.T.WILDER,L.E.MCKNIGHT, JRNL AUTH 2 E.P.RAMAN,D.B.NEAU,P.BEZAWADA,M.J.ALASADY,T.H.CHARPENTIER, JRNL AUTH 3 K.M.VARNEY,E.A.TOTH,A.D.MACKERELL,A.COOP,D.J.WEBER JRNL TITL SMALL MOLECULE INHIBITORS OF CA(2+)-S100B REVEAL TWO PROTEIN JRNL TITL 2 CONFORMATIONS. JRNL REF J.MED.CHEM. V. 59 592 2016 JRNL REFN ISSN 0022-2623 JRNL PMID 26727270 JRNL DOI 10.1021/ACS.JMEDCHEM.5B01369 REMARK 2 REMARK 2 RESOLUTION. 1.59 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX REMARK 3 AUTHORS : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN REMARK 3 : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE, REMARK 3 : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER, REMARK 3 : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY, REMARK 3 : REETAL PAI,RANDY READ,JANE RICHARDSON, REMARK 3 : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI, REMARK 3 : NICHOLAS SAUTER,JACOB SMITH,LAURENT REMARK 3 : STORONI,TOM TERWILLIGER,PETER ZWART REMARK 3 REMARK 3 REFINEMENT TARGET : ML REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.59 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 38.43 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 1.340 REMARK 3 COMPLETENESS FOR RANGE (%) : 99.9 REMARK 3 NUMBER OF REFLECTIONS : 13753 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.207 REMARK 3 R VALUE (WORKING SET) : 0.204 REMARK 3 FREE R VALUE : 0.230 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 10.010 REMARK 3 FREE R VALUE TEST SET COUNT : 1376 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (IN BINS). REMARK 3 BIN RESOLUTION RANGE COMPL. NWORK NFREE RWORK RFREE REMARK 3 1 38.4382 - 3.4262 1.00 1347 150 0.1864 0.1990 REMARK 3 2 3.4262 - 2.7197 1.00 1262 141 0.2031 0.2375 REMARK 3 3 2.7197 - 2.3760 1.00 1247 138 0.1980 0.2134 REMARK 3 4 2.3760 - 2.1588 1.00 1231 137 0.1996 0.2212 REMARK 3 5 2.1588 - 2.0040 1.00 1220 136 0.2099 0.2488 REMARK 3 6 2.0040 - 1.8859 1.00 1230 136 0.2227 0.2524 REMARK 3 7 1.8859 - 1.7914 1.00 1216 135 0.2289 0.3033 REMARK 3 8 1.7914 - 1.7135 1.00 1215 135 0.2471 0.2865 REMARK 3 9 1.7135 - 1.6475 1.00 1204 134 0.2552 0.3322 REMARK 3 10 1.6475 - 1.5906 0.99 1205 134 0.2839 0.3077 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : FLAT BULK SOLVENT MODEL REMARK 3 SOLVENT RADIUS : 1.11 REMARK 3 SHRINKAGE RADIUS : 0.90 REMARK 3 K_SOL : NULL REMARK 3 B_SOL : NULL REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.150 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 24.530 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 22.75 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 31.69 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : NULL REMARK 3 B22 (A**2) : NULL REMARK 3 B33 (A**2) : NULL REMARK 3 B12 (A**2) : NULL REMARK 3 B13 (A**2) : NULL REMARK 3 B23 (A**2) : NULL REMARK 3 REMARK 3 TWINNING INFORMATION. REMARK 3 FRACTION: NULL REMARK 3 OPERATOR: NULL REMARK 3 REMARK 3 DEVIATIONS FROM IDEAL VALUES. REMARK 3 RMSD COUNT REMARK 3 BOND : 0.006 790 REMARK 3 ANGLE : 0.971 1056 REMARK 3 CHIRALITY : 0.070 110 REMARK 3 PLANARITY : 0.003 137 REMARK 3 DIHEDRAL : 16.276 304 REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : NULL REMARK 3 REMARK 3 NCS DETAILS REMARK 3 NUMBER OF NCS GROUPS : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 5DKQ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 07-SEP-15. REMARK 100 THE DEPOSITION ID IS D_1000213356. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 14-DEC-13 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : SSRL REMARK 200 BEAMLINE : BL7-1 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.127092 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 315R REMARK 200 INTENSITY-INTEGRATION SOFTWARE : NULL REMARK 200 DATA SCALING SOFTWARE : AIMLESS 0.1.26 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 13794 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.590 REMARK 200 RESOLUTION RANGE LOW (A) : 38.430 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.9 REMARK 200 DATA REDUNDANCY : 7.100 REMARK 200 R MERGE (I) : 0.04900 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 23.3000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.59 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.62 REMARK 200 COMPLETENESS FOR SHELL (%) : 99.3 REMARK 200 DATA REDUNDANCY IN SHELL : 6.30 REMARK 200 R MERGE FOR SHELL (I) : 1.41400 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 1.500 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: PHENIX REMARK 200 STARTING MODEL: 1MHO REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 45.98 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.28 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 25% PEG 3,350; 0.1M BIS-TRIS, PH 7.5; REMARK 280 7.5MM CACL2; 5% GLYCEROL, VAPOR DIFFUSION, SITTING DROP, REMARK 280 TEMPERATURE 295K 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 24.13750 REMARK 290 SMTRY1 3 0.000000 -1.000000 0.000000 31.74250 REMARK 290 SMTRY2 3 1.000000 0.000000 0.000000 31.74250 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 12.06875 REMARK 290 SMTRY1 4 0.000000 1.000000 0.000000 31.74250 REMARK 290 SMTRY2 4 -1.000000 0.000000 0.000000 31.74250 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 36.20625 REMARK 290 SMTRY1 5 -1.000000 0.000000 0.000000 31.74250 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 31.74250 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 12.06875 REMARK 290 SMTRY1 6 1.000000 0.000000 0.000000 31.74250 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 31.74250 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 36.20625 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 24.13750 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: 3090 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 10130 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -83.0 KCAL/MOL 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 350 BIOMT1 2 0.000000 -1.000000 0.000000 0.00000 REMARK 350 BIOMT2 2 -1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 -24.13750 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 C2 5D0 A 103 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 209 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 274 LIES ON A SPECIAL POSITION. 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 GLU A 91 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 CA A 101 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 SER A 18 O REMARK 620 2 GLU A 21 O 100.2 REMARK 620 3 ASP A 23 O 84.7 84.8 REMARK 620 4 LYS A 26 O 89.4 166.7 87.1 REMARK 620 5 GLU A 31 OE1 98.8 113.9 159.7 73.0 REMARK 620 6 GLU A 31 OE2 75.7 74.3 148.0 117.2 50.8 REMARK 620 7 HOH A 250 O 173.7 83.8 90.9 85.9 83.9 110.2 REMARK 620 N 1 2 3 4 5 6 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA A 102 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 61 OD1 REMARK 620 2 ASP A 63 OD1 79.4 REMARK 620 3 ASP A 65 OD1 82.0 84.3 REMARK 620 4 GLU A 67 O 88.4 160.4 78.8 REMARK 620 5 GLU A 72 OE1 117.2 122.6 147.9 76.6 REMARK 620 6 GLU A 72 OE2 90.4 75.8 159.7 120.0 51.6 REMARK 620 7 HOH A 219 O 158.5 86.9 80.2 99.8 84.1 102.3 REMARK 620 N 1 2 3 4 5 6 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue CA A 101 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue CA A 102 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue 5D0 A 103 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 5DKN RELATED DB: PDB REMARK 900 RELATED ID: 5DKR RELATED DB: PDB DBREF 5DKQ A 0 91 UNP P02638 S100B_BOVIN 1 92 SEQRES 1 A 92 MET SER GLU LEU GLU LYS ALA VAL VAL ALA LEU ILE ASP SEQRES 2 A 92 VAL PHE HIS GLN TYR SER GLY ARG GLU GLY ASP LYS HIS SEQRES 3 A 92 LYS LEU LYS LYS SER GLU LEU LYS GLU LEU ILE ASN ASN SEQRES 4 A 92 GLU LEU SER HIS PHE LEU GLU GLU ILE LYS GLU GLN GLU SEQRES 5 A 92 VAL VAL ASP LYS VAL MET GLU THR LEU ASP SER ASP GLY SEQRES 6 A 92 ASP GLY GLU CYS ASP PHE GLN GLU PHE MET ALA PHE VAL SEQRES 7 A 92 ALA MET ILE THR THR ALA CYS HIS GLU PHE PHE GLU HIS SEQRES 8 A 92 GLU HET CA A 101 1 HET CA A 102 1 HET 5D0 A 103 31 HETNAM CA CALCIUM ION HETNAM 5D0 2,2'-[PENTANE-1,5-DIYLBIS(OXYBENZENE-4,1-DIYL)]DI-1,4, HETNAM 2 5D0 5,6-TETRAHYDROPYRIMIDINE FORMUL 2 CA 2(CA 2+) FORMUL 4 5D0 C25 H32 N4 O2 FORMUL 5 HOH *108(H2 O) HELIX 1 AA1 SER A 1 GLY A 19 1 19 HELIX 2 AA2 LYS A 28 LEU A 40 1 13 HELIX 3 AA3 GLU A 49 ASP A 61 1 13 HELIX 4 AA4 ASP A 69 GLU A 86 1 18 LINK O SER A 18 CA CA A 101 1555 1555 2.35 LINK O GLU A 21 CA CA A 101 1555 1555 2.42 LINK O ASP A 23 CA CA A 101 1555 1555 2.22 LINK O LYS A 26 CA CA A 101 1555 1555 2.36 LINK OE1 GLU A 31 CA CA A 101 1555 1555 2.50 LINK OE2 GLU A 31 CA CA A 101 1555 1555 2.61 LINK OD1 ASP A 61 CA CA A 102 1555 1555 2.27 LINK OD1 ASP A 63 CA CA A 102 1555 1555 2.32 LINK OD1 ASP A 65 CA CA A 102 1555 1555 2.37 LINK O GLU A 67 CA CA A 102 1555 1555 2.43 LINK OE1 GLU A 72 CA CA A 102 1555 1555 2.45 LINK OE2 GLU A 72 CA CA A 102 1555 1555 2.56 LINK CA CA A 101 O HOH A 250 1555 1555 2.32 LINK CA CA A 102 O HOH A 219 1555 1555 2.42 SITE 1 AC1 6 SER A 18 GLU A 21 ASP A 23 LYS A 26 SITE 2 AC1 6 GLU A 31 HOH A 250 SITE 1 AC2 6 ASP A 61 ASP A 63 ASP A 65 GLU A 67 SITE 2 AC2 6 GLU A 72 HOH A 219 SITE 1 AC3 9 VAL A 8 ILE A 11 ASP A 12 HIS A 15 SITE 2 AC3 9 HIS A 42 CYS A 84 HIS A 85 PHE A 87 SITE 3 AC3 9 PHE A 88 CRYST1 63.485 63.485 48.275 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 0.015752 0.000000 0.000000 0.00000 SCALE2 0.000000 0.015752 0.000000 0.00000 SCALE3 0.000000 0.000000 0.020715 0.00000