PDB Short entry for 1K4T
HEADER    ISOMERASE/DNA                           08-OCT-01   1K4T              
TITLE     HUMAN DNA TOPOISOMERASE I (70 KDA) IN COMPLEX WITH THE                
TITLE    2 POISON TOPOTECAN AND COVALENT COMPLEX WITH A 22 BASE PAIR            
TITLE    3 DNA DUPLEX                                                           
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 5'-D(*AP*AP*AP*AP*AP*GP*AP*CP*TP*T)-3';                    
COMPND   3 CHAIN: B;                                                            
COMPND   4 ENGINEERED: YES;                                                     
COMPND   5 MOL_ID: 2;                                                           
COMPND   6 MOLECULE: 5'-D(*(TGP)P*GP*AP*AP*AP*AP*AP*TP*TP*TP*TP*T)-3';          
COMPND   7 CHAIN: C;                                                            
COMPND   8 ENGINEERED: YES;                                                     
COMPND   9 MOL_ID: 3;                                                           
COMPND  10 MOLECULE: 5'-                                                        
COMPND  11 D(*AP*AP*AP*AP*AP*TP*TP*TP*TP*TP*CP*CP*AP*AP*GP*TP*CP*TP*TP          
COMPND  12 *TP*TP*T)-3';                                                        
COMPND  13 CHAIN: D;                                                            
COMPND  14 ENGINEERED: YES;                                                     
COMPND  15 MOL_ID: 4;                                                           
COMPND  16 MOLECULE: DNA TOPOISOMERASE I;                                       
COMPND  17 CHAIN: A;                                                            
COMPND  18 FRAGMENT: CORE DOMAIN AND C-TERMINAL DOMAIN, RESIDUES 174-           
COMPND  19 765;                                                                 
COMPND  20 EC: 5.99.1.2;                                                        
COMPND  21 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES;                                                      
SOURCE   3 MOL_ID: 2;                                                           
SOURCE   4 SYNTHETIC: YES;                                                      
SOURCE   5 MOL_ID: 3;                                                           
SOURCE   6 SYNTHETIC: YES;                                                      
SOURCE   7 MOL_ID: 4;                                                           
SOURCE   8 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   9 ORGANISM_COMMON: HUMAN;                                              
SOURCE  10 ORGANISM_TAXID: 9606;                                                
SOURCE  11 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA;                            
SOURCE  12 EXPRESSION_SYSTEM_COMMON: FALL ARMYWORM;                             
SOURCE  13 EXPRESSION_SYSTEM_TAXID: 7108;                                       
SOURCE  14 EXPRESSION_SYSTEM_VECTOR_TYPE: BACULOVIRUS;                          
SOURCE  15 EXPRESSION_SYSTEM_VECTOR: PFACTBAC1                                  
KEYWDS    COMPLEX (ISOMERASE/DNA), DNA, TOPOISOMERASE I, DRUG, POISON           
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    B.L.STAKER,K.HJERRILD,M.D.FEESE,C.A.BEHNKE,A.B.BURGIN JR.,            
AUTHOR   2 L.J.STEWART                                                          
REVDAT   2   24-FEB-09 1K4T    1       VERSN                                    
REVDAT   1   04-DEC-02 1K4T    0                                                
JRNL        AUTH   B.L.STAKER,K.HJERRILD,M.D.FEESE,C.A.BEHNKE,                  
JRNL        AUTH 2 A.B.BURGIN JR.,L.J.STEWART                                   
JRNL        TITL   THE MECHANISM OF TOPOISOMERASE I POISONING BY A              
JRNL        TITL 2 CAMPTOTHECIN ANALOG                                          
JRNL        REF    PROC.NATL.ACAD.SCI.USA        V.  99 15387 2002              
JRNL        REFN                   ISSN 0027-8424                               
JRNL        PMID   12426403                                                     
JRNL        DOI    10.1073/PNAS.242259599                                       
REMARK   1                                                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.10 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNX 2000.1                                           
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN,MOLECULAR                  
REMARK   3               : SIMULATIONS (BADGER,BERARD,KUMAR,SZALMA,             
REMARK   3               : YIP,DZAKULA)                                         
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.10                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 19.89                          
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)   (%) : 80.2                           
REMARK   3   NUMBER OF REFLECTIONS             : 45727                          
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) : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.229                           
REMARK   3   FREE R VALUE                     : 0.269                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 9.600                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 4384                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.004                           
REMARK   3                                                                      
REMARK   3  FIT/AGREEMENT OF MODEL WITH ALL DATA.                               
REMARK   3   R VALUE     (WORKING + TEST SET, NO CUTOFF) : NULL                 
REMARK   3   R VALUE            (WORKING SET, NO CUTOFF) : NULL                 
REMARK   3   FREE R VALUE                    (NO CUTOFF) : NULL                 
REMARK   3   FREE R VALUE TEST SET SIZE   (%, NO CUTOFF) : NULL                 
REMARK   3   FREE R VALUE TEST SET COUNT     (NO CUTOFF) : NULL                 
REMARK   3   ESTIMATED ERROR OF FREE R VALUE (NO CUTOFF) : NULL                 
REMARK   3   TOTAL NUMBER OF REFLECTIONS     (NO CUTOFF) : 45727                
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 6                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.10                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.23                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 44.50                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 3811                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3060                       
REMARK   3   BIN FREE R VALUE                    : 0.3620                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 9.80                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 413                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.018                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4687                                    
REMARK   3   NUCLEIC ACID ATOMS       : 892                                     
REMARK   3   HETEROGEN ATOMS          : 77                                      
REMARK   3   SOLVENT ATOMS            : 227                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 18.10                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 40.10                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -2.67000                                             
REMARK   3    B22 (A**2) : -1.96000                                             
REMARK   3    B33 (A**2) : 4.62000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 1.41000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.30                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.29                            
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) : 0.34                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.006                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.20                            
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 21.10                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 3.59                            
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        : 0.30                                                 
REMARK   3   BSOL        : 22.62                                                
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : PROTEIN.PARAM                                  
REMARK   3  PARAMETER FILE  2  : DNA-RNA.PARAM                                  
REMARK   3  PARAMETER FILE  3  : TTC_PAR.PARAM                                  
REMARK   3  PARAMETER FILE  4  : WATER.PARAM                                    
REMARK   3  PARAMETER FILE  5  : ION.PARAM                                      
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : DNA-RNA.TOP                                    
REMARK   3  TOPOLOGY FILE  3   : TTC_TOP.TOP                                    
REMARK   3  TOPOLOGY FILE  4   : WATER.TOP                                      
REMARK   3  TOPOLOGY FILE  5   : ION.TOP                                        
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1K4T COMPLIES WITH FORMAT V. 3.15, 01-DEC-08                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 06-DEC-01.                  
REMARK 100 THE RCSB ID CODE IS RCSB014561.                                      
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : NULL                               
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               : NSLS                               
REMARK 200  BEAMLINE                       : X25                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : NULL                               
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : NULL                               
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 46866                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.100                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 20.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : NULL                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : 0.06200                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 18.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.10                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.15                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 32.8                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : 0.32500                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 1.710                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: CNX                                                   
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 58.43                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.96                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 8000, AMMONIUM SULFATE, MES, PH      
REMARK 280  6.5, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 289K                
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       58.13000            
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: TETRAMERIC                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: B, C, D, 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     LYS A   174                                                      
REMARK 465     LYS A   175                                                      
REMARK 465     PRO A   176                                                      
REMARK 465     LYS A   177                                                      
REMARK 465     ASN A   178                                                      
REMARK 465     LYS A   179                                                      
REMARK 465     ASP A   180                                                      
REMARK 465     LYS A   181                                                      
REMARK 465     ASP A   182                                                      
REMARK 465     LYS A   183                                                      
REMARK 465     LYS A   184                                                      
REMARK 465     VAL A   185                                                      
REMARK 465     PRO A   186                                                      
REMARK 465     GLU A   187                                                      
REMARK 465     PRO A   188                                                      
REMARK 465     ASP A   189                                                      
REMARK 465     ASN A   190                                                      
REMARK 465     LYS A   191                                                      
REMARK 465     LYS A   192                                                      
REMARK 465     LYS A   193                                                      
REMARK 465     LYS A   194                                                      
REMARK 465     PRO A   195                                                      
REMARK 465     LYS A   196                                                      
REMARK 465     LYS A   197                                                      
REMARK 465     GLU A   198                                                      
REMARK 465     GLU A   199                                                      
REMARK 465     GLU A   200                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS(M=MODEL NUMBER;            
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470      DT B  10    O3'                                                 
REMARK 470     GLN A 201    CG   CD   OE1  NE2                                  
REMARK 470     LYS A 202    CG   CD   CE   NZ                                   
REMARK 470     THR A 639    OG1  CG2                                            
REMARK 470     PHE A 640    CG   CD1  CD2  CE1  CE2  CZ                         
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   O22  TTG C   991     O    HOH C   133              2.15            
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    LYS A 202       97.28     61.35                                   
REMARK 500    PRO A 212      172.68    -48.80                                   
REMARK 500    ASP A 344       85.45     41.28                                   
REMARK 500    ASN A 345      -13.80     70.08                                   
REMARK 500    CYS A 453       11.54   -142.94                                   
REMARK 500    PHE A 565       73.68   -104.18                                   
REMARK 500    PRO A 637       92.43    -40.06                                   
REMARK 500    LYS A 638       70.37      1.60                                   
REMARK 500    THR A 639      -13.07     60.18                                   
REMARK 500    LYS A 642        5.32    -67.91                                   
REMARK 500    MET A 675       68.87     65.97                                   
REMARK 500    MET A 758       74.22   -108.54                                   
REMARK 500    ALA A 759      118.30    177.74                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: PLANAR GROUPS                                              
REMARK 500                                                                      
REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL                 
REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE                    
REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN                    
REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS                        
REMARK 500 AN RMSD GREATER THAN THIS VALUE                                      
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        RMS     TYPE                                    
REMARK 500     DC D 112         0.09    SIDE_CHAIN                              
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                              HG A 900  HG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 CYS A 630   SG                                                     
REMARK 620 2 ARG A 590   O   109.2                                              
REMARK 620 N                    1                                               
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE TTC D 990                 
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HG A 900                  
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE TTG C 991                 
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE PG4 A 901                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1A35   RELATED DB: PDB                                   
REMARK 900 HUMAN RECONSTITUTED DNA TOPOISOMERASE I IN NON-COVALENT              
REMARK 900 COMPLEX WITH A 22 BASE PAIR DNA DUPLEX                               
REMARK 900 RELATED ID: 1A31   RELATED DB: PDB                                   
REMARK 900 HUMAN RECONSTITUTED DNA TOPOISOMERASE I IN COVALENT COMPLEX          
REMARK 900 WITH A 22 BASE PAIR DNA DUPLEX                                       
REMARK 900 RELATED ID: 1A36   RELATED DB: PDB                                   
REMARK 900 HUMAN DNA TOPOISOMERASE I (70 KDA) IN NON-COVALENT COMPLEX           
REMARK 900 WITH A 22 BASE PAIR DNA DUPLEX                                       
REMARK 900 RELATED ID: 1K4S   RELATED DB: PDB                                   
REMARK 900 HUMAN DNA TOPOISOMERASE I IN COVALENT COMPLEX WITH A 22              
REMARK 900 BASE PAIR DNA DUPLEX                                                 
DBREF  1K4T A  174   765  UNP    P11387   TOP1_HUMAN     174    765             
DBREF  1K4T B    1    10  PDB    1K4T     1K4T             1     10             
DBREF  1K4T C   11    22  PDB    1K4T     1K4T            11     22             
DBREF  1K4T D  101   122  PDB    1K4T     1K4T           101    122             
SEQADV 1K4T PTR A  723  UNP  P11387    TYR   723 MODIFIED RESIDUE               
SEQRES   1 B   10   DA  DA  DA  DA  DA  DG  DA  DC  DT  DT                      
SEQRES   1 C   12  TGP  DG  DA  DA  DA  DA  DA  DT  DT  DT  DT  DT              
SEQRES   1 D   22   DA  DA  DA  DA  DA  DT  DT  DT  DT  DT  DC  DC  DA          
SEQRES   2 D   22   DA  DG  DT  DC  DT  DT  DT  DT  DT                          
SEQRES   1 A  592  LYS LYS PRO LYS ASN LYS ASP LYS ASP LYS LYS VAL PRO          
SEQRES   2 A  592  GLU PRO ASP ASN LYS LYS LYS LYS PRO LYS LYS GLU GLU          
SEQRES   3 A  592  GLU GLN LYS TRP LYS TRP TRP GLU GLU GLU ARG TYR PRO          
SEQRES   4 A  592  GLU GLY ILE LYS TRP LYS PHE LEU GLU HIS LYS GLY PRO          
SEQRES   5 A  592  VAL PHE ALA PRO PRO TYR GLU PRO LEU PRO GLU ASN VAL          
SEQRES   6 A  592  LYS PHE TYR TYR ASP GLY LYS VAL MET LYS LEU SER PRO          
SEQRES   7 A  592  LYS ALA GLU GLU VAL ALA THR PHE PHE ALA LYS MET LEU          
SEQRES   8 A  592  ASP HIS GLU TYR THR THR LYS GLU ILE PHE ARG LYS ASN          
SEQRES   9 A  592  PHE PHE LYS ASP TRP ARG LYS GLU MET THR ASN GLU GLU          
SEQRES  10 A  592  LYS ASN ILE ILE THR ASN LEU SER LYS CYS ASP PHE THR          
SEQRES  11 A  592  GLN MET SER GLN TYR PHE LYS ALA GLN THR GLU ALA ARG          
SEQRES  12 A  592  LYS GLN MET SER LYS GLU GLU LYS LEU LYS ILE LYS GLU          
SEQRES  13 A  592  GLU ASN GLU LYS LEU LEU LYS GLU TYR GLY PHE CYS ILE          
SEQRES  14 A  592  MET ASP ASN HIS LYS GLU ARG ILE ALA ASN PHE LYS ILE          
SEQRES  15 A  592  GLU PRO PRO GLY LEU PHE ARG GLY ARG GLY ASN HIS PRO          
SEQRES  16 A  592  LYS MET GLY MET LEU LYS ARG ARG ILE MET PRO GLU ASP          
SEQRES  17 A  592  ILE ILE ILE ASN CYS SER LYS ASP ALA LYS VAL PRO SER          
SEQRES  18 A  592  PRO PRO PRO GLY HIS LYS TRP LYS GLU VAL ARG HIS ASP          
SEQRES  19 A  592  ASN LYS VAL THR TRP LEU VAL SER TRP THR GLU ASN ILE          
SEQRES  20 A  592  GLN GLY SER ILE LYS TYR ILE MET LEU ASN PRO SER SER          
SEQRES  21 A  592  ARG ILE LYS GLY GLU LYS ASP TRP GLN LYS TYR GLU THR          
SEQRES  22 A  592  ALA ARG ARG LEU LYS LYS CYS VAL ASP LYS ILE ARG ASN          
SEQRES  23 A  592  GLN TYR ARG GLU ASP TRP LYS SER LYS GLU MET LYS VAL          
SEQRES  24 A  592  ARG GLN ARG ALA VAL ALA LEU TYR PHE ILE ASP LYS LEU          
SEQRES  25 A  592  ALA LEU ARG ALA GLY ASN GLU LYS GLU GLU GLY GLU THR          
SEQRES  26 A  592  ALA ASP THR VAL GLY CYS CYS SER LEU ARG VAL GLU HIS          
SEQRES  27 A  592  ILE ASN LEU HIS PRO GLU LEU ASP GLY GLN GLU TYR VAL          
SEQRES  28 A  592  VAL GLU PHE ASP PHE LEU GLY LYS ASP SER ILE ARG TYR          
SEQRES  29 A  592  TYR ASN LYS VAL PRO VAL GLU LYS ARG VAL PHE LYS ASN          
SEQRES  30 A  592  LEU GLN LEU PHE MET GLU ASN LYS GLN PRO GLU ASP ASP          
SEQRES  31 A  592  LEU PHE ASP ARG LEU ASN THR GLY ILE LEU ASN LYS HIS          
SEQRES  32 A  592  LEU GLN ASP LEU MET GLU GLY LEU THR ALA LYS VAL PHE          
SEQRES  33 A  592  ARG THR TYR ASN ALA SER ILE THR LEU GLN GLN GLN LEU          
SEQRES  34 A  592  LYS GLU LEU THR ALA PRO ASP GLU ASN ILE PRO ALA LYS          
SEQRES  35 A  592  ILE LEU SER TYR ASN ARG ALA ASN ARG ALA VAL ALA ILE          
SEQRES  36 A  592  LEU CYS ASN HIS GLN ARG ALA PRO PRO LYS THR PHE GLU          
SEQRES  37 A  592  LYS SER MET MET ASN LEU GLN THR LYS ILE ASP ALA LYS          
SEQRES  38 A  592  LYS GLU GLN LEU ALA ASP ALA ARG ARG ASP LEU LYS SER          
SEQRES  39 A  592  ALA LYS ALA ASP ALA LYS VAL MET LYS ASP ALA LYS THR          
SEQRES  40 A  592  LYS LYS VAL VAL GLU SER LYS LYS LYS ALA VAL GLN ARG          
SEQRES  41 A  592  LEU GLU GLU GLN LEU MET LYS LEU GLU VAL GLN ALA THR          
SEQRES  42 A  592  ASP ARG GLU GLU ASN LYS GLN ILE ALA LEU GLY THR SER          
SEQRES  43 A  592  LYS LEU ASN PTR LEU ASP PRO ARG ILE THR VAL ALA TRP          
SEQRES  44 A  592  CYS LYS LYS TRP GLY VAL PRO ILE GLU LYS ILE TYR ASN          
SEQRES  45 A  592  LYS THR GLN ARG GLU LYS PHE ALA TRP ALA ILE ASP MET          
SEQRES  46 A  592  ALA ASP GLU ASP TYR GLU PHE                                  
MODRES 1K4T TGP C   11   DG                                                     
MODRES 1K4T PTR A  723  TYR  O-PHOSPHOTYROSINE                                  
HET    TGP  C  11      19                                                       
HET    PTR  A 723      16                                                       
HET    TTC  D 990      31                                                       
HET     HG  A 900       1                                                       
HET    TTG  C 991      32                                                       
HET    PG4  A 901      13                                                       
HETNAM     TGP 5'-THIO-2'-DEOXY-GUANOSINE PHOSPHONIC ACID                       
HETNAM     PTR O-PHOSPHOTYROSINE                                                
HETNAM     TTC (S)-10-[(DIMETHYLAMINO)METHYL]-4-ETHYL-4,9-DIHYDROXY-            
HETNAM   2 TTC  1H-PYRANO[3',4':6,7]INOLIZINO[1,2-B]-QUINOLINE-3,               
HETNAM   3 TTC  14(4H,12H)-DIONE                                                
HETNAM      HG MERCURY (II) ION                                                 
HETNAM     TTG 2-(1-DIMETHYLAMINOMETHYL-2-HYDROXY-8-HYDROXYMETHYL-9-            
HETNAM   2 TTG  OXO-9,11-DIHYDRO-INDOLIZINO[1,2-B]QUINOLIN-7-YL)-2-             
HETNAM   3 TTG  HYDROXY-BUTYRIC ACID                                            
HETNAM     PG4 TETRAETHYLENE GLYCOL                                             
HETSYN     PTR PHOSPHONOTYROSINE                                                
HETSYN     TTC TOPOTECAN, HYCAMTIN                                              
HETSYN     TTG HYDROLYZED PRODUCT OF TOPOTECAN                                  
FORMUL   2  TGP    C10 H14 N5 O6 P S                                            
FORMUL   4  PTR    C9 H12 N O6 P                                                
FORMUL   5  TTC    C23 H23 N3 O5                                                
FORMUL   6   HG    HG 2+                                                        
FORMUL   7  TTG    C23 H25 N3 O6                                                
FORMUL   8  PG4    C8 H18 O5                                                    
FORMUL   9  HOH   *227(H2 O)                                                    
HELIX    1   1 LYS A  204  GLU A  208  5                                   5    
HELIX    2   2 SER A  250  MET A  263  1                                  14    
HELIX    3   3 HIS A  266  THR A  270  5                                   5    
HELIX    4   4 LYS A  271  MET A  286  1                                  16    
HELIX    5   5 THR A  287  ILE A  294  1                                   8    
HELIX    6   6 PHE A  302  LYS A  317  1                                  16    
HELIX    7   7 SER A  320  GLY A  339  1                                  20    
HELIX    8   8 MET A  378  ASP A  381  5                                   4    
HELIX    9   9 SER A  433  LYS A  452  1                                  20    
HELIX   10  10 CYS A  453  TRP A  465  1                                  13    
HELIX   11  11 GLU A  469  LEU A  485  1                                  17    
HELIX   12  12 GLY A  503  LEU A  507  5                                   5    
HELIX   13  13 ARG A  508  GLU A  510  5                                   3    
HELIX   14  14 LYS A  532  SER A  534  5                                   3    
HELIX   15  15 GLU A  544  MET A  555  1                                  12    
HELIX   16  16 ASN A  569  MET A  581  1                                  13    
HELIX   17  17 LYS A  587  THR A  606  1                                  20    
HELIX   18  18 ASN A  611  CYS A  630  1                                  20    
HELIX   19  19 THR A  639  LYS A  642  5                                   4    
HELIX   20  20 SER A  643  VAL A  674  1                                  32    
HELIX   21  21 ASP A  677  ASN A  711  1                                  35    
HELIX   22  22 LEU A  716  PTR A  723  1                                   8    
HELIX   23  23 ASP A  725  GLY A  737  1                                  13    
HELIX   24  24 PRO A  739  ILE A  743  5                                   5    
HELIX   25  25 ASN A  745  PHE A  752  1                                   8    
HELIX   26  26 PHE A  752  MET A  758  1                                   7    
SHEET    1   A 3 LEU A 220  GLU A 221  0                                        
SHEET    2   A 3 PHE A 340  MET A 343 -1  O  ILE A 342   N  GLU A 221           
SHEET    3   A 3 HIS A 346  ARG A 349 -1  O  GLU A 348   N  CYS A 341           
SHEET    1   B 3 LYS A 245  VAL A 246  0                                        
SHEET    2   B 3 TYR A 241  TYR A 242 -1  N  TYR A 242   O  LYS A 245           
SHEET    3   B 3 CYS A 300  ASP A 301 -1  O  ASP A 301   N  TYR A 241           
SHEET    1   C 2 GLY A 359  LEU A 360  0                                        
SHEET    2   C 2 LEU A 373  LYS A 374 -1  O  LYS A 374   N  GLY A 359           
SHEET    1   D 4 GLU A 403  ARG A 405  0                                        
SHEET    2   D 4 ILE A 383  ASN A 385  1  N  ILE A 384   O  ARG A 405           
SHEET    3   D 4 VAL A 414  THR A 417 -1  O  SER A 415   N  ILE A 383           
SHEET    4   D 4 ILE A 424  ILE A 427 -1  O  LYS A 425   N  TRP A 416           
SHEET    1   E 3 ILE A 512  LEU A 518  0                                        
SHEET    2   E 3 GLN A 521  LEU A 530 -1  O  GLU A 526   N  ASN A 513           
SHEET    3   E 3 ARG A 536  PRO A 542 -1  O  TYR A 537   N  PHE A 529           
LINK         C3'  DT B  10                 O3P PTR A 723     1555   1555  1.43  
LINK         C   ASN A 722                 N   PTR A 723     1555   1555  1.33  
LINK         C   PTR A 723                 N   LEU A 724     1555   1555  1.32  
LINK        HG    HG A 900                 SG  CYS A 630     1555   1555  2.79  
LINK        HG    HG A 900                 O   ARG A 590     1555   1555  3.42  
LINK         O3' TGP C  11                 P    DG C  12     1555   1555  1.61  
SITE     1 AC1 12 ARG A 364  LYS A 532  ASP A 533  THR A 718                    
SITE     2 AC1 12  DT B  10  HOH D   3  TGP C  11  HOH C  28                    
SITE     3 AC1 12 HOH C 133   DC D 112   DA D 113  HOH D1002                    
SITE     1 AC2  3 ARG A 590  LEU A 629  CYS A 630                               
SITE     1 AC3 15 ARG A 364  LYS A 532  ASP A 533  THR A 718                    
SITE     2 AC3 15 ASN A 722  PTR A 723   DT B  10  HOH D   3                    
SITE     3 AC3 15 TGP C  11  HOH C  28  HOH C 133   DC D 112                    
SITE     4 AC3 15  DA D 113  HOH D 997  HOH D1002                               
SITE     1 AC4  4 ASP A 500  GLU A 510  HIS A 511  LEU A 530                    
CRYST1   57.093  116.260   75.217  90.00  94.16  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      0.017515  0.000000  0.001274        0.00000                         
SCALE2      0.000000  0.008601  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.013330        0.00000