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Database: PDB
Entry: 2B54
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Original site: 2B54 
HEADER    TRANSFERASE                             27-SEP-05   2B54              
TITLE     HUMAN CYCLIN DEPENDENT KINASE 2 (CKD2)COMPLEXED WITH DIN-232305       
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CELL DIVISION PROTEIN KINASE 2;                            
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: P33 PROTEIN KINASE, CDK2;                                   
COMPND   5 EC: 2.7.1.37;                                                        
COMPND   6 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA;                            
SOURCE   6 EXPRESSION_SYSTEM_COMMON: FALL ARMYWORM;                             
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 7108;                                       
SOURCE   8 EXPRESSION_SYSTEM_CELL_LINE: SF9;                                    
SOURCE   9 EXPRESSION_SYSTEM_VECTOR: BACULOVIRUS                                
KEYWDS    PROTEIN KINASE, CELL CYCLE, PHOSPHORYLATION, CELL DIVISION, MITOSIS,  
KEYWDS   2 INHIBITION, TRANSFERASE                                              
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    C.-C.CHANG                                                            
REVDAT   4   03-APR-24 2B54    1       REMARK                                   
REVDAT   3   14-FEB-24 2B54    1       REMARK                                   
REVDAT   2   24-FEB-09 2B54    1       VERSN                                    
REVDAT   1   11-OCT-05 2B54    0                                                
JRNL        AUTH   J.A.MARKWALDER,M.R.ARNONE,P.A.BENFIELD,M.BOISCLAIR,          
JRNL        AUTH 2 C.R.BURTON,C.-C.CHANG,S.S.COX,P.M.CZERNIAK,C.L.DEAN,         
JRNL        AUTH 3 D.DOLENAIK,R.GRAFSTROM,B.A.HARRISON,R.F.KALTENBACH III,      
JRNL        AUTH 4 D.A.NUGIEL,K.A.ROSSI,S.R.SHERK,L.M.SISK,P.STOUTEN,           
JRNL        AUTH 5 G.L.TRAINOR,P.WORLAND,S.P.SEITZ                              
JRNL        TITL   SYNTHESIS AND BIOLOGICAL EVALUATION OF                       
JRNL        TITL 2 1-ARYL-4,5-DIHYDRO-1H-PYRAXOLO[3,4-D]PYRIMIDIN-4-ONE         
JRNL        TITL 3 INHIBITORS OF CYCLIN DEPENDENT KINASES                       
JRNL        REF    J.MED.CHEM.                   V.  47  5894 2004              
JRNL        REFN                   ISSN 0022-2623                               
JRNL        PMID   15537345                                                     
JRNL        DOI    10.1021/JM020455U                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.85 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNX 2002                                             
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN,ACCELRYS                   
REMARK   3               : SOFTWARE INC.(BADGER,BERARD,KUMAR,SZALMA,            
REMARK   3               : YIP,DZAKULA)                                         
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.85                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 37.44                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 411647.250                     
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0000                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 78.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 20039                          
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) : 0.158                           
REMARK   3   R VALUE            (WORKING SET) : 0.158                           
REMARK   3   FREE R VALUE                     : 0.263                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 9.900                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 838                             
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.009                           
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) : NULL                 
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) : 1.85                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.97                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 4.50                         
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 166                          
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3540                       
REMARK   3   BIN FREE R VALUE                    : 0.4010                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 11.70                        
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 22                           
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.085                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 2398                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 30                                      
REMARK   3   SOLVENT ATOMS            : 106                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 9.80                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 29.00                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -1.16000                                             
REMARK   3    B22 (A**2) : 2.65000                                              
REMARK   3    B33 (A**2) : -1.49000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.21                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.40                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.31                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.33                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.154                           
REMARK   3   BOND ANGLES            (DEGREES) : 9.500                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 30.20                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 8.270                           
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) : 1.890 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 3.250 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 14.000; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 13.870; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.23                                                 
REMARK   3   BSOL        : 51.07                                                
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  : WAT21_CNX.XPRM                                 
REMARK   3  PARAMETER FILE  2  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : NULL                                           
REMARK   3  TOPOLOGY FILE  2   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 2B54 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 29-SEP-05.                  
REMARK 100 THE DEPOSITION ID IS D_1000034686.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 26-OCT-97                          
REMARK 200  TEMPERATURE           (KELVIN) : 277                                
REMARK 200  PH                             : 7.4                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : ROTATING ANODE                     
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : RIGAKU RU200                       
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU RAXIS II                    
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : SCALE (RIGAKU), PROCESS (RIGAKU)   
REMARK 200  DATA SCALING SOFTWARE          : SCALE (RIGAKU)                     
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 21779                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.840                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 37.440                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 83.7                               
REMARK 200  DATA REDUNDANCY                : 2.200                              
REMARK 200  R MERGE                    (I) : 0.09900                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 3.1000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.84                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.87                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 67.3                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 1.60                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.45700                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 0.500                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: X-PLOR                                                
REMARK 200 STARTING MODEL: IN-HOUSE CDK2 MODEL                                  
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 42.26                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.13                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 100MM HEPES PH 7.4, 50MM AMMONIUM        
REMARK 280  ACETATE, 2MM DTT, 4-14% PEG 4000, VAPOR DIFFUSION, SITTING DROP,    
REMARK 280  TEMPERATURE 291K                                                    
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       36.48500            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       27.13000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       36.58000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       27.13000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       36.48500            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       36.58000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
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 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   HG   SER A   276     H2   HOH A   386              1.04            
REMARK 500   HZ3  LYS A   242     H1   HOH A   376              1.08            
REMARK 500   HE   ARG A   157     O    HIS A   161              1.40            
REMARK 500   H    THR A   158     O    GLU A   162              1.43            
REMARK 500   O    ARG A   150     H    GLY A   153              1.50            
REMARK 500   C    LEU A    37     H    ASP A    38              1.54            
REMARK 500   O    LEU A   148     H    ARG A   150              1.55            
REMARK 500   C    ARG A    36     H    LEU A    37              1.59            
REMARK 500   O    PHE A    90     H    SER A    94              1.59            
REMARK 500   C    GLY A   153     H    VAL A   154              1.60            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500  HE21  GLN A   113     H1   HOH A   339     3848     1.17            
REMARK 500  HD22  ASN A    23     OH   TYR A   179     4529     1.44            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
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    HIS A 119   CG    HIS A 119   CD2     0.059                       
REMARK 500    HIS A 125   CG    HIS A 125   CD2     0.060                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    LEU A  25   CA  -  CB  -  CG  ANGL. DEV. =  19.2 DEGREES          
REMARK 500    VAL A  29   CA  -  CB  -  CG1 ANGL. DEV. =  10.3 DEGREES          
REMARK 500    LEU A 124   CB  -  CA  -  C   ANGL. DEV. =  14.3 DEGREES          
REMARK 500    HIS A 161   CA  -  CB  -  CG  ANGL. DEV. = -10.2 DEGREES          
REMARK 500    GLU A 172   CA  -  CB  -  CG  ANGL. DEV. =  17.2 DEGREES          
REMARK 500    TYR A 180   CB  -  CG  -  CD2 ANGL. DEV. =  -3.7 DEGREES          
REMARK 500    VAL A 184   CA  -  CB  -  CG1 ANGL. DEV. =  14.4 DEGREES          
REMARK 500    ARG A 199   NE  -  CZ  -  NH2 ANGL. DEV. =   3.2 DEGREES          
REMARK 500    ARG A 214   NE  -  CZ  -  NH1 ANGL. DEV. =   3.4 DEGREES          
REMARK 500    ARG A 214   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.9 DEGREES          
REMARK 500    PHE A 216   CB  -  CG  -  CD1 ANGL. DEV. =  -4.8 DEGREES          
REMARK 500    VAL A 230   CA  -  CB  -  CG2 ANGL. DEV. =  10.8 DEGREES          
REMARK 500    TYR A 269   CB  -  CG  -  CD2 ANGL. DEV. =  -4.0 DEGREES          
REMARK 500    ARG A 274   NE  -  CZ  -  NH1 ANGL. DEV. =  -3.6 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    THR A  14      -98.62     57.42                                   
REMARK 500    TYR A  15       11.76    -64.31                                   
REMARK 500    ASP A  38       76.56     41.78                                   
REMARK 500    GLU A  40      -66.66   -162.08                                   
REMARK 500    LEU A  58       77.58    -64.38                                   
REMARK 500    ASN A  74       15.82     59.32                                   
REMARK 500    ARG A 126      -28.10     92.16                                   
REMARK 500    ALA A 149       31.29    -68.48                                   
REMARK 500    ARG A 150      -64.21   -165.59                                   
REMARK 500    THR A 160     -166.16    -61.24                                   
REMARK 500    HIS A 161       54.39    -92.82                                   
REMARK 500    VAL A 164      -70.21    -36.24                                   
REMARK 500    THR A 165      111.97    117.83                                   
REMARK 500    PRO A 254       50.91   -108.19                                   
REMARK 500    THR A 290     -161.44   -119.60                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: NON-CIS, NON-TRANS                                         
REMARK 500                                                                      
REMARK 500 THE FOLLOWING PEPTIDE BONDS DEVIATE SIGNIFICANTLY FROM BOTH          
REMARK 500 CIS AND TRANS CONFORMATION.  CIS BONDS, IF ANY, ARE LISTED           
REMARK 500 ON CISPEP RECORDS.  TRANS IS DEFINED AS 180 +/- 30 AND               
REMARK 500 CIS IS DEFINED AS 0 +/- 30 DEGREES.                                  
REMARK 500                                 MODEL     OMEGA                      
REMARK 500 GLU A   42     GLY A   43                 -100.49                    
REMARK 500 ARG A  157     THR A  158                 -148.15                    
REMARK 500 THR A  158     TYR A  159                  -50.65                    
REMARK 500 THR A  160     HIS A  161                 -128.57                    
REMARK 500 HIS A  161     GLU A  162                  145.89                    
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    ARG A  22         0.08    SIDE CHAIN                              
REMARK 500    TYR A  77         0.09    SIDE CHAIN                              
REMARK 500    ARG A 126         0.09    SIDE CHAIN                              
REMARK 500    ARG A 169         0.13    SIDE CHAIN                              
REMARK 500    ARG A 245         0.14    SIDE CHAIN                              
REMARK 500    ARG A 274         0.14    SIDE CHAIN                              
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE D05 A 300                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 2B52   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 2B53   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 2B55   RELATED DB: PDB                                   
DBREF  2B54 A    1   298  UNP    P24941   CDK2_HUMAN       1    298             
SEQRES   1 A  298  MET GLU ASN PHE GLN LYS VAL GLU LYS ILE GLY GLU GLY          
SEQRES   2 A  298  THR TYR GLY VAL VAL TYR LYS ALA ARG ASN LYS LEU THR          
SEQRES   3 A  298  GLY GLU VAL VAL ALA LEU LYS LYS ILE ARG LEU ASP THR          
SEQRES   4 A  298  GLU THR GLU GLY VAL PRO SER THR ALA ILE ARG GLU ILE          
SEQRES   5 A  298  SER LEU LEU LYS GLU LEU ASN HIS PRO ASN ILE VAL LYS          
SEQRES   6 A  298  LEU LEU ASP VAL ILE HIS THR GLU ASN LYS LEU TYR LEU          
SEQRES   7 A  298  VAL PHE GLU PHE LEU HIS GLN ASP LEU LYS LYS PHE MET          
SEQRES   8 A  298  ASP ALA SER ALA LEU THR GLY ILE PRO LEU PRO LEU ILE          
SEQRES   9 A  298  LYS SER TYR LEU PHE GLN LEU LEU GLN GLY LEU ALA PHE          
SEQRES  10 A  298  CYS HIS SER HIS ARG VAL LEU HIS ARG ASP LEU LYS PRO          
SEQRES  11 A  298  GLN ASN LEU LEU ILE ASN THR GLU GLY ALA ILE LYS LEU          
SEQRES  12 A  298  ALA ASP PHE GLY LEU ALA ARG ALA PHE GLY VAL PRO VAL          
SEQRES  13 A  298  ARG THR TYR THR HIS GLU VAL VAL THR LEU TRP TYR ARG          
SEQRES  14 A  298  ALA PRO GLU ILE LEU LEU GLY CYS LYS TYR TYR SER THR          
SEQRES  15 A  298  ALA VAL ASP ILE TRP SER LEU GLY CYS ILE PHE ALA GLU          
SEQRES  16 A  298  MET VAL THR ARG ARG ALA LEU PHE PRO GLY ASP SER GLU          
SEQRES  17 A  298  ILE ASP GLN LEU PHE ARG ILE PHE ARG THR LEU GLY THR          
SEQRES  18 A  298  PRO ASP GLU VAL VAL TRP PRO GLY VAL THR SER MET PRO          
SEQRES  19 A  298  ASP TYR LYS PRO SER PHE PRO LYS TRP ALA ARG GLN ASP          
SEQRES  20 A  298  PHE SER LYS VAL VAL PRO PRO LEU ASP GLU ASP GLY ARG          
SEQRES  21 A  298  SER LEU LEU SER GLN MET LEU HIS TYR ASP PRO ASN LYS          
SEQRES  22 A  298  ARG ILE SER ALA LYS ALA ALA LEU ALA HIS PRO PHE PHE          
SEQRES  23 A  298  GLN ASP VAL THR LYS PRO VAL PRO HIS LEU ARG LEU              
HET    D05  A 300      30                                                       
HETNAM     D05 6-(3,4-DIHYDROXYBENZYL)-3-ETHYL-1-(2,4,6-                        
HETNAM   2 D05  TRICHLOROPHENYL)-1H-PYRAZOLO[3,4-D]PYRIMIDIN-4(5H)-ONE          
HETSYN     D05 DIN-232305                                                       
FORMUL   2  D05    C20 H15 CL3 N4 O3                                            
FORMUL   3  HOH   *106(H2 O)                                                    
HELIX    1   1 PRO A   45  LYS A   56  1                                  12    
HELIX    2   2 LEU A   87  SER A   94  1                                   8    
HELIX    3   3 PRO A  100  HIS A  121  1                                  22    
HELIX    4   4 LYS A  129  GLN A  131  5                                   3    
HELIX    5   5 GLY A  147  PHE A  152  1                                   6    
HELIX    6   6 ALA A  170  LEU A  175  1                                   6    
HELIX    7   7 THR A  182  ARG A  199  1                                  18    
HELIX    8   8 SER A  207  GLY A  220  1                                  14    
HELIX    9   9 GLY A  229  MET A  233  5                                   5    
HELIX   10  10 ASP A  247  VAL A  252  1                                   6    
HELIX   11  11 ASP A  256  LEU A  267  1                                  12    
HELIX   12  12 SER A  276  LEU A  281  1                                   6    
HELIX   13  13 ALA A  282  GLN A  287  5                                   6    
SHEET    1   A 5 PHE A   4  GLY A  11  0                                        
SHEET    2   A 5 VAL A  18  ASN A  23 -1  O  LYS A  20   N  GLU A   8           
SHEET    3   A 5 VAL A  29  LYS A  34 -1  O  VAL A  30   N  ALA A  21           
SHEET    4   A 5 LYS A  75  GLU A  81 -1  O  PHE A  80   N  ALA A  31           
SHEET    5   A 5 LEU A  66  THR A  72 -1  N  ASP A  68   O  VAL A  79           
SHEET    1   B 3 GLN A  85  ASP A  86  0                                        
SHEET    2   B 3 LEU A 133  ASN A 136 -1  O  ILE A 135   N  GLN A  85           
SHEET    3   B 3 ALA A 140  LEU A 143 -1  O  LYS A 142   N  LEU A 134           
CISPEP   1 ASP A   38    THR A   39          0        25.73                     
CISPEP   2 THR A   41    GLU A   42          0         1.93                     
CISPEP   3 TYR A  159    THR A  160          0       -29.26                     
CISPEP   4 PRO A  253    PRO A  254          0         3.21                     
SITE     1 AC1 12 ILE A  10  GLY A  11  VAL A  18  ALA A  31                    
SITE     2 AC1 12 LYS A  33  VAL A  64  PHE A  82  LEU A  83                    
SITE     3 AC1 12 HIS A  84  GLN A 131  ASN A 132  ALA A 144                    
CRYST1   72.970   73.160   54.260  90.00  90.00  90.00 P 21 21 21    4          
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      0.013704  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.013669  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.018430        0.00000                         
(ATOM LINES ARE NOT SHOWN.)
END                                                                             
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