HEADER    ELECTRON TRANSPORT                      31-MAR-08   3CP5              
TITLE     CYTOCHROME C FROM RHODOTHERMUS MARINUS                                
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CYTOCHROME C;                                              
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: UNP RESIDUES 29-152;                                       
COMPND   5 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: RHODOTHERMUS MARINUS;                           
SOURCE   3 ORGANISM_COMMON: RHODOTHERMUS OBAMENSIS;                             
SOURCE   4 ORGANISM_TAXID: 29549;                                               
SOURCE   5 GENE: CYTC;                                                          
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    CYTOCHROME C, ELECTRON TRANSFER PROTEIN, ELECTRON TRANSPORT           
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.STELTER,A.MELO,L.SARAIVA,M.TEIXEIRA,M.ARCHER                        
REVDAT   5   30-OCT-24 3CP5    1       REMARK LINK                              
REVDAT   4   24-FEB-09 3CP5    1       VERSN                                    
REVDAT   3   25-NOV-08 3CP5    1       JRNL                                     
REVDAT   2   11-NOV-08 3CP5    1       DBREF                                    
REVDAT   1   28-OCT-08 3CP5    0                                                
JRNL        AUTH   M.STELTER,A.M.MELO,M.M.PEREIRA,C.M.GOMES,G.O.HREGGVIDSSON,   
JRNL        AUTH 2 S.HJORLEIFSDOTTIR,L.M.SARAIVA,M.TEIXEIRA,M.ARCHER            
JRNL        TITL   A NOVEL TYPE OF MONOHEME CYTOCHROME C: BIOCHEMICAL AND       
JRNL        TITL 2 STRUCTURAL CHARACTERIZATION AT 1.23 A RESOLUTION OF          
JRNL        TITL 3 RHODOTHERMUS MARINUS CYTOCHROME C                            
JRNL        REF    BIOCHEMISTRY                  V.  47 11953 2008              
JRNL        REFN                   ISSN 0006-2960                               
JRNL        PMID   18855424                                                     
JRNL        DOI    10.1021/BI800999G                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.24 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) : 1.24                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 10.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 91.8                           
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) : 0.130                  
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : 0.130                  
REMARK   3   FREE R VALUE                  (NO CUTOFF) : 0.174                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : 5.020                  
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : 1489                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : 29669                  
REMARK   3                                                                      
REMARK   3  FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F).                     
REMARK   3   R VALUE   (WORKING + TEST SET, F>4SIG(F)) : 0.108                  
REMARK   3   R VALUE          (WORKING SET, F>4SIG(F)) : 0.107                  
REMARK   3   FREE R VALUE                  (F>4SIG(F)) : 0.150                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : 5.020                  
REMARK   3   FREE R VALUE TEST SET COUNT   (F>4SIG(F)) : 1136                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (F>4SIG(F)) : 21492                  
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS      : 912                                           
REMARK   3   NUCLEIC ACID ATOMS : 0                                             
REMARK   3   HETEROGEN ATOMS    : 48                                            
REMARK   3   SOLVENT ATOMS      : 168                                           
REMARK   3                                                                      
REMARK   3  MODEL REFINEMENT.                                                   
REMARK   3   OCCUPANCY SUM OF NON-HYDROGEN ATOMS      : 1094.5                  
REMARK   3   OCCUPANCY SUM OF HYDROGEN ATOMS          : 885.00                  
REMARK   3   NUMBER OF DISCRETELY DISORDERED RESIDUES : 9                       
REMARK   3   NUMBER OF LEAST-SQUARES PARAMETERS       : 10515                   
REMARK   3   NUMBER OF RESTRAINTS                     : 12788                   
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM RESTRAINT TARGET VALUES.                        
REMARK   3   BOND LENGTHS                         (A) : 0.013                   
REMARK   3   ANGLE DISTANCES                      (A) : 0.032                   
REMARK   3   SIMILAR DISTANCES (NO TARGET VALUES) (A) : 0.010                   
REMARK   3   DISTANCES FROM RESTRAINT PLANES      (A) : 0.027                   
REMARK   3   ZERO CHIRAL VOLUMES               (A**3) : 0.074                   
REMARK   3   NON-ZERO CHIRAL VOLUMES           (A**3) : 0.083                   
REMARK   3   ANTI-BUMPING DISTANCE RESTRAINTS     (A) : 0.029                   
REMARK   3   RIGID-BOND ADP COMPONENTS         (A**2) : 0.004                   
REMARK   3   SIMILAR ADP COMPONENTS            (A**2) : 0.064                   
REMARK   3   APPROXIMATELY ISOTROPIC ADPS      (A**2) : 0.090                   
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED: NULL                                                  
REMARK   3                                                                      
REMARK   3  STEREOCHEMISTRY TARGET VALUES : ENGH AND HUBER                      
REMARK   3   SPECIAL CASE: RESTRAINTS ON PROSTHETIC GROUPS                      
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 3CP5 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 01-APR-08.                  
REMARK 100 THE DEPOSITION ID IS D_1000047045.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 24-SEP-06                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 2.2                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : ESRF                               
REMARK 200  BEAMLINE                       : ID14-1                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.934                              
REMARK 200  MONOCHROMATOR                  : DIAMOND (111), GE(220)             
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC                               
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : MOSFLM                             
REMARK 200  DATA SCALING SOFTWARE          : CCP4 (SCALA)                       
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 29745                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.230                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 42.410                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 96.3                               
REMARK 200  DATA REDUNDANCY                : 9.300                              
REMARK 200  R MERGE                    (I) : 0.08400                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 13.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.23                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.30                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 75.9                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 2.80                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.48000                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 1.600                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: SAD                          
REMARK 200 SOFTWARE USED: SHELX                                                 
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 37.20                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.96                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 30% PEG8K, 0.2M AMMONIUM SULFATE, 8%     
REMARK 280  HEXANEDIOL, 50MM SODIUM CITRATE, PH2.2, VAPOR DIFFUSION, HANGING    
REMARK 280  DROP, TEMPERATURE 293K                                              
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       16.32200            
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 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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                  
REMARK 350 SOFTWARE USED: PISA                                                  
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     THR A     1                                                      
REMARK 465     GLU A     2                                                      
REMARK 465     SER A     3                                                      
REMARK 465     GLY A     4                                                      
REMARK 465     THR A     5                                                      
REMARK 465     ALA A     6                                                      
REMARK 465     ALA A     7                                                      
REMARK 465     GLN A     8                                                      
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    ARG A  61   NE  -  CZ  -  NH1 ANGL. DEV. =   3.4 DEGREES          
REMARK 500    ASP A  62   CB  -  CG  -  OD1 ANGL. DEV. =  10.9 DEGREES          
REMARK 500    ARG A  66   NE  -  CZ  -  NH1 ANGL. DEV. =   3.2 DEGREES          
REMARK 500    ARG A  85   NE  -  CZ  -  NH1 ANGL. DEV. =  -3.4 DEGREES          
REMARK 500    ARG A 111   NE  -  CZ  -  NH1 ANGL. DEV. =   3.2 DEGREES          
REMARK 500    ARG A 118   NE  -  CZ  -  NH1 ANGL. DEV. =   4.0 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  55     -120.07   -142.25                                   
REMARK 500    ASN A  78       54.97   -144.49                                   
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                             HEC A 202  FE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS A  49   NE2                                                    
REMARK 620 2 HEC A 202   NA   88.8                                              
REMARK 620 3 HEC A 202   NB   88.3  91.8                                        
REMARK 620 4 HEC A 202   NC   89.9 178.6  88.5                                  
REMARK 620 5 HEC A 202   ND   87.8  88.5 176.1  91.1                            
REMARK 620 6 MET A 100   SD  175.6  87.9  94.7  93.4  89.2                      
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 SO4 A 201                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEC A 202                 
DBREF  3CP5 A    1   124  UNP    B3FQS5   B3FQS5_RHOMR    29    152             
SEQRES   1 A  124  THR GLU SER GLY THR ALA ALA GLN ASP PRO GLU ALA LEU          
SEQRES   2 A  124  ALA ALA GLU ILE GLY PRO VAL LYS GLN VAL SER LEU GLY          
SEQRES   3 A  124  GLU GLN ILE ASP ALA ALA LEU ALA GLN GLN GLY GLU GLN          
SEQRES   4 A  124  LEU PHE ASN THR TYR CYS THR ALA CYS HIS ARG LEU ASP          
SEQRES   5 A  124  GLU ARG PHE ILE GLY PRO ALA LEU ARG ASP VAL THR LYS          
SEQRES   6 A  124  ARG ARG GLY PRO VAL TYR ILE MET ASN VAL MET LEU ASN          
SEQRES   7 A  124  PRO ASN GLY MET ILE GLN ARG HIS PRO VAL MET LYS GLN          
SEQRES   8 A  124  LEU VAL GLN GLU TYR GLY THR MET MET THR ASP MET ALA          
SEQRES   9 A  124  LEU SER GLU GLU GLN ALA ARG ALA ILE LEU GLU TYR LEU          
SEQRES  10 A  124  ARG GLN VAL ALA GLU ASN GLN                                  
HET    SO4  A 201       5                                                       
HET    HEC  A 202      43                                                       
HETNAM     SO4 SULFATE ION                                                      
HETNAM     HEC HEME C                                                           
FORMUL   2  SO4    O4 S 2-                                                      
FORMUL   3  HEC    C34 H34 FE N4 O4                                             
FORMUL   4  HOH   *168(H2 O)                                                    
HELIX    1   1 ASP A    9  GLY A   18  1                                  10    
HELIX    2   2 ASP A   30  CYS A   45  1                                  16    
HELIX    3   3 ASP A   62  ARG A   67  1                                   6    
HELIX    4   4 GLY A   68  ASN A   78  1                                  11    
HELIX    5   5 ASN A   78  HIS A   86  1                                   9    
HELIX    6   6 HIS A   86  GLY A   97  1                                  12    
HELIX    7   7 SER A  106  GLN A  124  1                                  19    
LINK         SG  CYS A  45                 CAB HEC A 202     1555   1555  1.87  
LINK         SG  CYS A  48                 CAC HEC A 202     1555   1555  1.85  
LINK         NE2 HIS A  49                FE   HEC A 202     1555   1555  2.02  
LINK         SD  MET A 100                FE   HEC A 202     1555   1555  2.34  
CISPEP   1 GLY A   18    PRO A   19          0         9.62                     
SITE     1 AC1  6 GLU A 122  HOH A 368  HOH A 377  HOH A 425                    
SITE     2 AC1  6 HOH A 427  HOH A 437                                          
SITE     1 AC2 16 TYR A  44  CYS A  45  CYS A  48  HIS A  49                    
SITE     2 AC2 16 ILE A  56  PRO A  58  ARG A  66  ARG A  67                    
SITE     3 AC2 16 TYR A  71  MET A  76  ILE A  83  LEU A  92                    
SITE     4 AC2 16 THR A  98  MET A  99  MET A 100  HOH A 324                    
CRYST1   39.592   32.644   42.064  90.00  94.56  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      0.025258  0.000000  0.002014        0.00000                         
SCALE2      0.000000  0.030633  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.023849        0.00000