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Database: PDB
Entry: 4EC9
LinkDB: 4EC9
Original site: 4EC9 
HEADER    TRANSFERASE/PROTEIN BINDING             26-MAR-12   4EC9              
TITLE     CRYSTAL STRUCTURE OF FULL-LENGTH CDK9 IN COMPLEX WITH CYCLIN T        
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CYCLIN-DEPENDENT KINASE 9;                                 
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: C-2K, CELL DIVISION CYCLE 2-LIKE PROTEIN KINASE 4, CELL     
COMPND   5 DIVISION PROTEIN KINASE 9, SERINE/THREONINE-PROTEIN KINASE PITALRE,  
COMPND   6 TAT-ASSOCIATED KINASE COMPLEX CATALYTIC SUBUNIT;                     
COMPND   7 EC: 2.7.11.22, 2.7.11.23;                                            
COMPND   8 ENGINEERED: YES;                                                     
COMPND   9 MOL_ID: 2;                                                           
COMPND  10 MOLECULE: CYCLIN-T1;                                                 
COMPND  11 CHAIN: B;                                                            
COMPND  12 FRAGMENT: UNP RESIDUES 2-259;                                        
COMPND  13 SYNONYM: CYCT1, CYCLIN-T;                                            
COMPND  14 ENGINEERED: YES;                                                     
COMPND  15 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 GENE: CDC2L4, CDK9, TAK;                                             
SOURCE   6 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA;                            
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 7108;                                       
SOURCE   8 EXPRESSION_SYSTEM_CELL_LINE: SF9;                                    
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: BACULOVIRUS;                          
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: PVL1392;                                  
SOURCE  11 MOL_ID: 2;                                                           
SOURCE  12 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE  13 ORGANISM_COMMON: HUMAN;                                              
SOURCE  14 ORGANISM_TAXID: 9606;                                                
SOURCE  15 GENE: CCNT1;                                                         
SOURCE  16 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA;                            
SOURCE  17 EXPRESSION_SYSTEM_TAXID: 7108;                                       
SOURCE  18 EXPRESSION_SYSTEM_CELL_LINE: SF9;                                    
SOURCE  19 EXPRESSION_SYSTEM_VECTOR_TYPE: BACULOVIRUS;                          
SOURCE  20 EXPRESSION_SYSTEM_PLASMID: PVL1392                                   
KEYWDS    CYCLIN DEPENDENT KINASE, CYCLIN, KINASE, PHOSPHORYLATION, NUCLEAR,    
KEYWDS   2 TRANSFERASE-PROTEIN BINDING COMPLEX                                  
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    S.BAUMLI,A.J.HOLE,J.A.ENDICOTT                                        
REVDAT   2   02-JAN-13 4EC9    1       JRNL                                     
REVDAT   1   12-SEP-12 4EC9    0                                                
JRNL        AUTH   S.BAUMLI,A.J.HOLE,L.Z.WANG,M.E.NOBLE,J.A.ENDICOTT            
JRNL        TITL   THE CDK9 TAIL DETERMINES THE REACTION PATHWAY OF POSITIVE    
JRNL        TITL 2 TRANSCRIPTION ELONGATION FACTOR B.                           
JRNL        REF    STRUCTURE                     V.  20  1788 2012              
JRNL        REFN                   ISSN 0969-2126                               
JRNL        PMID   22959624                                                     
JRNL        DOI    10.1016/J.STR.2012.08.011                                    
REMARK   2                                                                      
REMARK   2 RESOLUTION.    3.21 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : PHENIX (PHENIX.REFINE: 1.6.4_486)                    
REMARK   3   AUTHORS     : PAUL ADAMS,PAVEL AFONINE,VICENT CHEN,IAN             
REMARK   3               : DAVIS,KRESHNA GOPAL,RALF GROSSE-                     
REMARK   3               : KUNSTLEVE,LI-WEI HUNG,ROBERT IMMORMINO,              
REMARK   3               : TOM IOERGER,AIRLIE MCCOY,ERIK MCKEE,NIGEL            
REMARK   3               : MORIARTY,REETAL PAI,RANDY READ,JANE                  
REMARK   3               : RICHARDSON,DAVID RICHARDSON,TOD ROMO,JIM             
REMARK   3               : SACCHETTINI,NICHOLAS SAUTER,JACOB SMITH,             
REMARK   3               : LAURENT STORONI,TOM TERWILLIGER,PETER                
REMARK   3               : ZWART                                                
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : ML                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 3.21                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 46.60                          
REMARK   3   MIN(FOBS/SIGMA_FOBS)              : 0.040                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 95.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 17257                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.203                           
REMARK   3   R VALUE            (WORKING SET) : 0.201                           
REMARK   3   FREE R VALUE                     : 0.233                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.080                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 877                             
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (IN BINS).                           
REMARK   3   BIN  RESOLUTION RANGE  COMPL.    NWORK NFREE   RWORK  RFREE        
REMARK   3     1 46.6047 -  5.8263    0.97     2791   153  0.1950 0.2293        
REMARK   3     2  5.8263 -  4.6259    0.99     2818   161  0.1932 0.2146        
REMARK   3     3  4.6259 -  4.0415    0.98     2864   144  0.1698 0.2152        
REMARK   3     4  4.0415 -  3.6722    0.97     2771   141  0.2119 0.2326        
REMARK   3     5  3.6722 -  3.4090    0.93     2648   159  0.2528 0.2800        
REMARK   3     6  3.4090 -  3.2081    0.86     2488   119  0.2953 0.3509        
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED        : FLAT BULK SOLVENT MODEL                       
REMARK   3   SOLVENT RADIUS     : 1.00                                          
REMARK   3   SHRINKAGE RADIUS   : 0.89                                          
REMARK   3   K_SOL              : 0.38                                          
REMARK   3   B_SOL              : 106.09                                        
REMARK   3                                                                      
REMARK   3  ERROR ESTIMATES.                                                    
REMARK   3   COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED)     : 0.370            
REMARK   3   PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : NULL             
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 144.40                         
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -4.71160                                             
REMARK   3    B22 (A**2) : -4.71160                                             
REMARK   3    B33 (A**2) : 9.42320                                              
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  TWINNING INFORMATION.                                               
REMARK   3   FRACTION: NULL                                                     
REMARK   3   OPERATOR: NULL                                                     
REMARK   3                                                                      
REMARK   3  DEVIATIONS FROM IDEAL VALUES.                                       
REMARK   3                 RMSD          COUNT                                  
REMARK   3   BOND      :  0.008           4635                                  
REMARK   3   ANGLE     :  1.456           6283                                  
REMARK   3   CHIRALITY :  0.071            707                                  
REMARK   3   PLANARITY :  0.008            794                                  
REMARK   3   DIHEDRAL  : 13.178           1736                                  
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
REMARK   3                                                                      
REMARK   3  NCS DETAILS                                                         
REMARK   3   NUMBER OF NCS GROUPS : NULL                                        
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 4EC9 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 27-MAR-12.                  
REMARK 100 THE RCSB ID CODE IS RCSB071436.                                      
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 17-MAY-09                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6.2                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : ESRF                               
REMARK 200  BEAMLINE                       : ID14-4                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.93300                            
REMARK 200  MONOCHROMATOR                  : SINGLE SILICON MONOCHROMATOR AND   
REMARK 200                                   TOROIDAL FOCUSING MIRROR           
REMARK 200  OPTICS                         : SINGLE SILICON (111)               
REMARK 200                                   MONOCHROMATOR AND TOROIDAL         
REMARK 200                                   FOCUSING MIRROR                    
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : AREA DETECTOR                      
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 315R                  
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : MOSFLM                             
REMARK 200  DATA SCALING SOFTWARE          : SCALA                              
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 17982                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 3.208                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 46.600                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.9                               
REMARK 200  DATA REDUNDANCY                : 2.800                              
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : 0.05100                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 11.7000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 3.21                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 3.38                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 98.2                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 2.90                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.51400                            
REMARK 200  R SYM FOR SHELL            (I) : 0.51400                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 1.500                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS            
REMARK 200 SOFTWARE USED: PHENIX.REFINE                                         
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 68.60                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.92                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 1% PEG 1K, 200MM NK PHSOPHATE, PH 6.2,   
REMARK 280  VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 277K                     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: H 3                              
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z                                                
REMARK 290       3555   -X+Y,-X,Z                                               
REMARK 290       4555   X+2/3,Y+1/3,Z+1/3                                       
REMARK 290       5555   -Y+2/3,X-Y+1/3,Z+1/3                                    
REMARK 290       6555   -X+Y+2/3,-X+1/3,Z+1/3                                   
REMARK 290       7555   X+1/3,Y+2/3,Z+2/3                                       
REMARK 290       8555   -Y+1/3,X-Y+2/3,Z+2/3                                    
REMARK 290       9555   -X+Y+1/3,-X+2/3,Z+2/3                                   
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 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   3 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       87.11450            
REMARK 290   SMTRY2   4  0.000000  1.000000  0.000000       50.29558            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000       32.66333            
REMARK 290   SMTRY1   5 -0.500000 -0.866025  0.000000       87.11450            
REMARK 290   SMTRY2   5  0.866025 -0.500000  0.000000       50.29558            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       32.66333            
REMARK 290   SMTRY1   6 -0.500000  0.866025  0.000000       87.11450            
REMARK 290   SMTRY2   6 -0.866025 -0.500000  0.000000       50.29558            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       32.66333            
REMARK 290   SMTRY1   7  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   7  0.000000  1.000000  0.000000      100.59116            
REMARK 290   SMTRY3   7  0.000000  0.000000  1.000000       65.32667            
REMARK 290   SMTRY1   8 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   8  0.866025 -0.500000  0.000000      100.59116            
REMARK 290   SMTRY3   8  0.000000  0.000000  1.000000       65.32667            
REMARK 290   SMTRY1   9 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   9 -0.866025 -0.500000  0.000000      100.59116            
REMARK 290   SMTRY3   9  0.000000  0.000000  1.000000       65.32667            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 1690 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 28240 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -12.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B                                  
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 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     GLY A     0                                                      
REMARK 465     PRO A     1                                                      
REMARK 465     ALA A     2                                                      
REMARK 465     LYS A     3                                                      
REMARK 465     GLN A     4                                                      
REMARK 465     TYR A     5                                                      
REMARK 465     ASP A     6                                                      
REMARK 465     GLN A    27                                                      
REMARK 465     GLY A    28                                                      
REMARK 465     THR A    29                                                      
REMARK 465     PHE A    30                                                      
REMARK 465     ALA A    89                                                      
REMARK 465     SER A    90                                                      
REMARK 465     PRO A    91                                                      
REMARK 465     TYR A    92                                                      
REMARK 465     ASN A    93                                                      
REMARK 465     ARG A    94                                                      
REMARK 465     CYS A    95                                                      
REMARK 465     LYS A    96                                                      
REMARK 465     GLN A   271                                                      
REMARK 465     LYS A   272                                                      
REMARK 465     LEU A   328                                                      
REMARK 465     SER A   329                                                      
REMARK 465     THR A   330                                                      
REMARK 465     HIS A   331                                                      
REMARK 465     LEU A   332                                                      
REMARK 465     THR A   333                                                      
REMARK 465     SER A   334                                                      
REMARK 465     MET A   335                                                      
REMARK 465     PHE A   336                                                      
REMARK 465     GLU A   337                                                      
REMARK 465     TYR A   338                                                      
REMARK 465     LEU A   339                                                      
REMARK 465     ALA A   340                                                      
REMARK 465     PRO A   341                                                      
REMARK 465     PRO A   342                                                      
REMARK 465     ARG A   343                                                      
REMARK 465     ARG A   344                                                      
REMARK 465     LYS A   345                                                      
REMARK 465     GLY A   346                                                      
REMARK 465     SER A   347                                                      
REMARK 465     GLN A   348                                                      
REMARK 465     ILE A   349                                                      
REMARK 465     THR A   350                                                      
REMARK 465     GLN A   351                                                      
REMARK 465     GLN A   352                                                      
REMARK 465     SER A   353                                                      
REMARK 465     THR A   354                                                      
REMARK 465     ASN A   355                                                      
REMARK 465     GLN A   356                                                      
REMARK 465     SER A   357                                                      
REMARK 465     ARG A   358                                                      
REMARK 465     ASN A   359                                                      
REMARK 465     PRO A   360                                                      
REMARK 465     ALA A   361                                                      
REMARK 465     THR A   362                                                      
REMARK 465     THR A   363                                                      
REMARK 465     ASN A   364                                                      
REMARK 465     GLN A   365                                                      
REMARK 465     THR A   366                                                      
REMARK 465     GLU A   367                                                      
REMARK 465     PHE A   368                                                      
REMARK 465     GLU A   369                                                      
REMARK 465     ARG A   370                                                      
REMARK 465     VAL A   371                                                      
REMARK 465     PHE A   372                                                      
REMARK 465     GLY B     0                                                      
REMARK 465     PRO B     1                                                      
REMARK 465     GLU B     2                                                      
REMARK 465     GLY B     3                                                      
REMARK 465     GLU B     4                                                      
REMARK 465     ARG B     5                                                      
REMARK 465     LYS B     6                                                      
REMARK 465     ASN B     7                                                      
REMARK 465     ASN B     8                                                      
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    CYS A  10       57.66   -155.71                                   
REMARK 500    LYS A  24       98.61    -61.22                                   
REMARK 500    GLU A  53      -59.20    -26.60                                   
REMARK 500    ASN A  54      -64.91   -125.18                                   
REMARK 500    GLU A  55       77.15     45.13                                   
REMARK 500    LEU A 118       12.78    -69.70                                   
REMARK 500    ASP A 149       40.98   -141.10                                   
REMARK 500    ASP A 167       78.14     63.86                                   
REMARK 500    LYS A 178     -158.19    -93.58                                   
REMARK 500    ARG A 184       68.18   -117.75                                   
REMARK 500    VAL A 190      133.17     84.51                                   
REMARK 500    ASP A 205       64.88   -112.87                                   
REMARK 500    SER A 226      141.12   -170.79                                   
REMARK 500    THR A 249      133.03   -170.73                                   
REMARK 500    ASN A 255       -2.24     85.35                                   
REMARK 500    ASN A 258      -29.20    -38.53                                   
REMARK 500    TYR A 262      -71.27    -52.47                                   
REMARK 500    LYS A 264        1.55    -62.45                                   
REMARK 500    GLU A 266       71.10     42.74                                   
REMARK 500    LEU A 296       49.52    -85.30                                   
REMARK 500    ASP A 318      -57.75    -28.70                                   
REMARK 500    ASP A 323      171.14    -53.62                                   
REMARK 500    LYS A 325      -77.37    -29.26                                   
REMARK 500    THR B 121        5.32    -62.93                                   
REMARK 500    PHE B 146       15.65     57.91                                   
REMARK 500    LEU B 163       17.65    -69.13                                   
REMARK 500    ASN B 250       -8.28     75.56                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 4EC8   RELATED DB: PDB                                   
DBREF  4EC9 A    2   372  UNP    P50750   CDK9_HUMAN       2    372             
DBREF  4EC9 B    2   259  UNP    O60563   CCNT1_HUMAN      2    259             
SEQADV 4EC9 GLY A    0  UNP  P50750              EXPRESSION TAG                 
SEQADV 4EC9 PRO A    1  UNP  P50750              EXPRESSION TAG                 
SEQADV 4EC9 GLY B    0  UNP  O60563              EXPRESSION TAG                 
SEQADV 4EC9 PRO B    1  UNP  O60563              EXPRESSION TAG                 
SEQADV 4EC9 ARG B   77  UNP  O60563    GLN    77 ENGINEERED MUTATION            
SEQADV 4EC9 GLY B   96  UNP  O60563    GLU    96 ENGINEERED MUTATION            
SEQADV 4EC9 LEU B  241  UNP  O60563    PHE   241 ENGINEERED MUTATION            
SEQRES   1 A  373  GLY PRO ALA LYS GLN TYR ASP SER VAL GLU CYS PRO PHE          
SEQRES   2 A  373  CYS ASP GLU VAL SER LYS TYR GLU LYS LEU ALA LYS ILE          
SEQRES   3 A  373  GLY GLN GLY THR PHE GLY GLU VAL PHE LYS ALA ARG HIS          
SEQRES   4 A  373  ARG LYS THR GLY GLN LYS VAL ALA LEU LYS LYS VAL LEU          
SEQRES   5 A  373  MET GLU ASN GLU LYS GLU GLY PHE PRO ILE THR ALA LEU          
SEQRES   6 A  373  ARG GLU ILE LYS ILE LEU GLN LEU LEU LYS HIS GLU ASN          
SEQRES   7 A  373  VAL VAL ASN LEU ILE GLU ILE CYS ARG THR LYS ALA SER          
SEQRES   8 A  373  PRO TYR ASN ARG CYS LYS GLY SER ILE TYR LEU VAL PHE          
SEQRES   9 A  373  ASP PHE CYS GLU HIS ASP LEU ALA GLY LEU LEU SER ASN          
SEQRES  10 A  373  VAL LEU VAL LYS PHE THR LEU SER GLU ILE LYS ARG VAL          
SEQRES  11 A  373  MET GLN MET LEU LEU ASN GLY LEU TYR TYR ILE HIS ARG          
SEQRES  12 A  373  ASN LYS ILE LEU HIS ARG ASP MET LYS ALA ALA ASN VAL          
SEQRES  13 A  373  LEU ILE THR ARG ASP GLY VAL LEU LYS LEU ALA ASP PHE          
SEQRES  14 A  373  GLY LEU ALA ARG ALA PHE SER LEU ALA LYS ASN SER GLN          
SEQRES  15 A  373  PRO ASN ARG TYR TPO ASN ARG VAL VAL THR LEU TRP TYR          
SEQRES  16 A  373  ARG PRO PRO GLU LEU LEU LEU GLY GLU ARG ASP TYR GLY          
SEQRES  17 A  373  PRO PRO ILE ASP LEU TRP GLY ALA GLY CYS ILE MET ALA          
SEQRES  18 A  373  GLU MET TRP THR ARG SER PRO ILE MET GLN GLY ASN THR          
SEQRES  19 A  373  GLU GLN HIS GLN LEU ALA LEU ILE SER GLN LEU CYS GLY          
SEQRES  20 A  373  SER ILE THR PRO GLU VAL TRP PRO ASN VAL ASP ASN TYR          
SEQRES  21 A  373  GLU LEU TYR GLU LYS LEU GLU LEU VAL LYS GLY GLN LYS          
SEQRES  22 A  373  ARG LYS VAL LYS ASP ARG LEU LYS ALA TYR VAL ARG ASP          
SEQRES  23 A  373  PRO TYR ALA LEU ASP LEU ILE ASP LYS LEU LEU VAL LEU          
SEQRES  24 A  373  ASP PRO ALA GLN ARG ILE ASP SER ASP ASP ALA LEU ASN          
SEQRES  25 A  373  HIS ASP PHE PHE TRP SER ASP PRO MET PRO SER ASP LEU          
SEQRES  26 A  373  LYS GLY MET LEU SER THR HIS LEU THR SER MET PHE GLU          
SEQRES  27 A  373  TYR LEU ALA PRO PRO ARG ARG LYS GLY SER GLN ILE THR          
SEQRES  28 A  373  GLN GLN SER THR ASN GLN SER ARG ASN PRO ALA THR THR          
SEQRES  29 A  373  ASN GLN THR GLU PHE GLU ARG VAL PHE                          
SEQRES   1 B  260  GLY PRO GLU GLY GLU ARG LYS ASN ASN ASN LYS ARG TRP          
SEQRES   2 B  260  TYR PHE THR ARG GLU GLN LEU GLU ASN SER PRO SER ARG          
SEQRES   3 B  260  ARG PHE GLY VAL ASP PRO ASP LYS GLU LEU SER TYR ARG          
SEQRES   4 B  260  GLN GLN ALA ALA ASN LEU LEU GLN ASP MET GLY GLN ARG          
SEQRES   5 B  260  LEU ASN VAL SER GLN LEU THR ILE ASN THR ALA ILE VAL          
SEQRES   6 B  260  TYR MET HIS ARG PHE TYR MET ILE GLN SER PHE THR ARG          
SEQRES   7 B  260  PHE PRO GLY ASN SER VAL ALA PRO ALA ALA LEU PHE LEU          
SEQRES   8 B  260  ALA ALA LYS VAL GLU GLY GLN PRO LYS LYS LEU GLU HIS          
SEQRES   9 B  260  VAL ILE LYS VAL ALA HIS THR CYS LEU HIS PRO GLN GLU          
SEQRES  10 B  260  SER LEU PRO ASP THR ARG SER GLU ALA TYR LEU GLN GLN          
SEQRES  11 B  260  VAL GLN ASP LEU VAL ILE LEU GLU SER ILE ILE LEU GLN          
SEQRES  12 B  260  THR LEU GLY PHE GLU LEU THR ILE ASP HIS PRO HIS THR          
SEQRES  13 B  260  HIS VAL VAL LYS CYS THR GLN LEU VAL ARG ALA SER LYS          
SEQRES  14 B  260  ASP LEU ALA GLN THR SER TYR PHE MET ALA THR ASN SER          
SEQRES  15 B  260  LEU HIS LEU THR THR PHE SER LEU GLN TYR THR PRO PRO          
SEQRES  16 B  260  VAL VAL ALA CYS VAL CYS ILE HIS LEU ALA CYS LYS TRP          
SEQRES  17 B  260  SER ASN TRP GLU ILE PRO VAL SER THR ASP GLY LYS HIS          
SEQRES  18 B  260  TRP TRP GLU TYR VAL ASP ALA THR VAL THR LEU GLU LEU          
SEQRES  19 B  260  LEU ASP GLU LEU THR HIS GLU LEU LEU GLN ILE LEU GLU          
SEQRES  20 B  260  LYS THR PRO ASN ARG LEU LYS ARG ILE TRP ASN TRP ARG          
MODRES 4EC9 TPO A  186  THR  PHOSPHOTHREONINE                                   
HET    TPO  A 186      11                                                       
HETNAM     TPO PHOSPHOTHREONINE                                                 
HETSYN     TPO PHOSPHONOTHREONINE                                               
FORMUL   1  TPO    C4 H10 N O6 P                                                
HELIX    1   1 PRO A   60  LEU A   73  1                                  14    
HELIX    2   2 LEU A  110  ASN A  116  1                                   7    
HELIX    3   3 THR A  122  ASN A  143  1                                  22    
HELIX    4   4 LYS A  151  ALA A  153  5                                   3    
HELIX    5   5 THR A  191  ARG A  195  5                                   5    
HELIX    6   6 PRO A  196  LEU A  201  1                                   6    
HELIX    7   7 PRO A  208  ARG A  225  1                                  18    
HELIX    8   8 THR A  233  GLY A  246  1                                  14    
HELIX    9   9 ASN A  255  TYR A  259  5                                   5    
HELIX   10  10 LYS A  274  LYS A  280  1                                   7    
HELIX   11  11 ASP A  285  LEU A  296  1                                  12    
HELIX   12  12 ASP A  305  HIS A  312  1                                   8    
HELIX   13  13 ASP A  313  TRP A  316  5                                   4    
HELIX   14  14 THR B   15  ASN B   21  1                                   7    
HELIX   15  15 SER B   24  GLY B   28  5                                   5    
HELIX   16  16 ASP B   30  LEU B   52  1                                  23    
HELIX   17  17 SER B   55  TYR B   70  1                                  16    
HELIX   18  18 PRO B   79  GLU B   95  1                                  17    
HELIX   19  19 LYS B  100  HIS B  113  1                                  14    
HELIX   20  20 SER B  123  LEU B  144  1                                  22    
HELIX   21  21 HIS B  152  LEU B  163  1                                  12    
HELIX   22  22 SER B  167  THR B  185  1                                  19    
HELIX   23  23 THR B  186  GLN B  190  5                                   5    
HELIX   24  24 THR B  192  SER B  208  1                                  17    
HELIX   25  25 HIS B  220  VAL B  225  5                                   6    
HELIX   26  26 THR B  230  THR B  248  1                                  19    
HELIX   27  27 ARG B  251  TRP B  256  5                                   6    
SHEET    1   A 6 ASP A  14  GLU A  15  0                                        
SHEET    2   A 6 LEU A  81  ARG A  86  1  O  ARG A  86   N  ASP A  14           
SHEET    3   A 6 ILE A  99  ASP A 104 -1  O  VAL A 102   N  ILE A  82           
SHEET    4   A 6 LYS A  44  LYS A  49 -1  N  LYS A  48   O  LEU A 101           
SHEET    5   A 6 VAL A  33  HIS A  38 -1  N  PHE A  34   O  LEU A  47           
SHEET    6   A 6 TYR A  19  LYS A  24 -1  N  LEU A  22   O  LYS A  35           
SHEET    1   B 3 HIS A 108  ASP A 109  0                                        
SHEET    2   B 3 VAL A 155  ILE A 157 -1  O  ILE A 157   N  HIS A 108           
SHEET    3   B 3 LEU A 163  LEU A 165 -1  O  LYS A 164   N  LEU A 156           
SHEET    1   C 2 ILE A 145  LEU A 146  0                                        
SHEET    2   C 2 ARG A 172  ALA A 173 -1  O  ARG A 172   N  LEU A 146           
LINK         C   TYR A 185                 N   TPO A 186     1555   1555  1.33  
LINK         C   TPO A 186                 N   ASN A 187     1555   1555  1.33  
CRYST1  174.229  174.229   97.990  90.00  90.00 120.00 H 3           9          
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      0.005740  0.003314  0.000000        0.00000                         
SCALE2      0.000000  0.006627  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.010205        0.00000                         
(ATOM LINES ARE NOT SHOWN.)
END                                                                             
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