HEADER    LIGASE                                  07-SEP-04   1XDN              
TITLE     HIGH RESOLUTION CRYSTAL STRUCTURE OF AN EDITOSOME ENZYME FROM         
TITLE    2 TRYPANOSOMA BRUCEI: RNA EDITING LIGASE 1                             
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: RNA EDITING LIGASE MP52;                                   
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: ADENYLATION DOMAIN;                                        
COMPND   5 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: TRYPANOSOMA BRUCEI;                             
SOURCE   3 ORGANISM_TAXID: 5691;                                                
SOURCE   4 GENE: MP52;                                                          
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21GOLD DE3;                              
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PSKB3                                     
KEYWDS    RNA EDITING, LIGASE, TRYPANOSOMA BRUCEI                               
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    J.DENG,A.SCHNAUFER,R.SALAVATI,K.D.STUART,W.G.HOL                      
REVDAT   4   16-OCT-24 1XDN    1       REMARK SEQADV LINK                       
REVDAT   3   10-SEP-14 1XDN    1       JRNL   VERSN                             
REVDAT   2   24-FEB-09 1XDN    1       VERSN                                    
REVDAT   1   07-DEC-04 1XDN    0                                                
JRNL        AUTH   J.DENG,A.SCHNAUFER,R.SALAVATI,K.D.STUART,W.G.HOL             
JRNL        TITL   HIGH RESOLUTION CRYSTAL STRUCTURE OF A KEY EDITOSOME ENZYME  
JRNL        TITL 2 FROM TRYPANOSOMA BRUCEI: RNA EDITING LIGASE 1.               
JRNL        REF    J.MOL.BIOL.                   V. 343   601 2004              
JRNL        REFN                   ISSN 0022-2836                               
JRNL        PMID   15465048                                                     
JRNL        DOI    10.1016/J.JMB.2004.08.041                                    
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.20 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.1.24                                        
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.20                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 98.3                           
REMARK   3   NUMBER OF REFLECTIONS             : 78835                          
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) : 0.129                           
REMARK   3   R VALUE            (WORKING SET) : 0.128                           
REMARK   3   FREE R VALUE                     : 0.148                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 4149                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.20                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.23                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 4798                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1170                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 260                          
REMARK   3   BIN FREE R VALUE                    : 0.1310                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 2119                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 32                                      
REMARK   3   SOLVENT ATOMS            : 440                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 7.29                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 9.40                           
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -0.22000                                             
REMARK   3    B22 (A**2) : -0.02000                                             
REMARK   3    B33 (A**2) : 0.28000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.12000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.034         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.033         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.017         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 0.349         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.975                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.972                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  2206 ; 0.010 ; 0.021       
REMARK   3   BOND LENGTHS OTHERS               (A):  1976 ; 0.002 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  2993 ; 1.420 ; 1.978       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  4606 ; 0.784 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   264 ; 5.763 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   320 ; 0.084 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  2428 ; 0.011 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):   457 ; 0.017 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   423 ; 0.220 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  2349 ; 0.250 ; 0.200       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  1304 ; 0.084 ; 0.200       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   304 ; 0.169 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    11 ; 0.119 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):    38 ; 0.217 ; 0.200       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    36 ; 0.177 ; 0.200       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):  1319 ; 1.192 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  2128 ; 1.915 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):   887 ; 2.829 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):   865 ; 4.258 ; 4.500       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                              
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : BABINET MODEL WITH MASK                              
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.40                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING   
REMARK   3  POSITIONS                                                           
REMARK   4                                                                      
REMARK   4 1XDN COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 08-SEP-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000030242.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 15-DEC-03                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 7.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 19-ID                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.97885, 0.97899, 0.96112          
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 4                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 95711                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.100                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 86.8                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : 0.06400                            
REMARK 200  R SYM                      (I) : 0.06400                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 33.8000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.10                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : NULL                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 86.8                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.06400                            
REMARK 200  R SYM FOR SHELL            (I) : 0.06400                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 33.80                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: MAD                                            
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MAD                          
REMARK 200 SOFTWARE USED: SOLVE                                                 
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 45.80                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.30                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 3350, MAGNESIUM CHLORIDE, TRIS,      
REMARK 280  ATP, PH 7.5, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 298K        
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       29.28950            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     GLY A    48                                                      
REMARK 465     HIS A    49                                                      
REMARK 465     MET A    50                                                      
REMARK 465     ASP A    51                                                      
REMARK 465     LYS A   317                                                      
REMARK 465     HIS A   318                                                      
REMARK 465     PRO A   319                                                      
REMARK 465     GLY A   320                                                      
REMARK 465     LYS A   321                                                      
REMARK 465     GLN A   322                                                      
REMARK 465     LYS A   323                                                      
REMARK 465     GLU A   324                                                      
REMARK 480                                                                      
REMARK 480 ZERO OCCUPANCY ATOM                                                  
REMARK 480 THE FOLLOWING RESIDUES HAVE ATOMS MODELED WITH ZERO                  
REMARK 480 OCCUPANCY. THE LOCATION AND PROPERTIES OF THESE ATOMS                
REMARK 480 MAY NOT BE RELIABLE. (M=MODEL NUMBER; RES=RESIDUE NAME;              
REMARK 480 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):         
REMARK 480   M RES C SSEQI ATOMS                                                
REMARK 480     GLU A  278   CD   OE1  OE2                                       
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   OE1  GLU A   278     O    HOH A   677              2.08            
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    MSE A 314  SE     MSE A 314   CE      2.364                       
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    MSE A 314   CB  -  CG  - SE   ANGL. DEV. = -23.5 DEGREES          
REMARK 500    MSE A 314   CG  - SE   -  CE  ANGL. DEV. = -43.0 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    TYR A 165       96.21   -160.96                                   
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                              MG A 502  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ATP A 501   O1G                                                    
REMARK 620 2 ATP A 501   O2B  86.6                                              
REMARK 620 3 HOH A 514   O    89.5 173.3                                        
REMARK 620 4 HOH A 520   O    96.9  90.2  84.9                                  
REMARK 620 5 HOH A 528   O   177.6  94.7  89.4  85.1                            
REMARK 620 6 HOH A 530   O    90.8  95.6  89.9 170.6  87.1                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 502                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ATP A 501                 
DBREF  1XDN A   51   324  GB     11067037 AAG27062        51    324             
SEQADV 1XDN GLY A   48  GB   11067037            CLONING ARTIFACT               
SEQADV 1XDN HIS A   49  GB   11067037            CLONING ARTIFACT               
SEQADV 1XDN MET A   50  GB   11067037            CLONING ARTIFACT               
SEQADV 1XDN MSE A  115  GB   11067037  MET   115 MODIFIED RESIDUE               
SEQADV 1XDN MSE A  263  GB   11067037  MET   263 MODIFIED RESIDUE               
SEQADV 1XDN MSE A  314  GB   11067037  MET   314 MODIFIED RESIDUE               
SEQRES   1 A  277  GLY HIS MET ASP GLN SER ASP PHE SER PRO TYR ILE GLU          
SEQRES   2 A  277  ILE ASP LEU PRO SER GLU SER ARG ILE GLN SER LEU HIS          
SEQRES   3 A  277  LYS SER GLY LEU ALA ALA GLN GLU TRP VAL ALA CYS GLU          
SEQRES   4 A  277  LYS VAL HIS GLY THR ASN PHE GLY ILE TYR LEU ILE ASN          
SEQRES   5 A  277  GLN GLY ASP HIS GLU VAL VAL ARG PHE ALA LYS ARG SER          
SEQRES   6 A  277  GLY ILE MSE ASP PRO ASN GLU ASN PHE PHE GLY TYR HIS          
SEQRES   7 A  277  ILE LEU ILE ASP GLU PHE THR ALA GLN ILE ARG ILE LEU          
SEQRES   8 A  277  ASN ASP LEU LEU LYS GLN LYS TYR GLY LEU SER ARG VAL          
SEQRES   9 A  277  GLY ARG LEU VAL LEU ASN GLY GLU LEU PHE GLY ALA LYS          
SEQRES  10 A  277  TYR LYS HIS PRO LEU VAL PRO LYS SER GLU LYS TRP CYS          
SEQRES  11 A  277  THR LEU PRO ASN GLY LYS LYS PHE PRO ILE ALA GLY VAL          
SEQRES  12 A  277  GLN ILE GLN ARG GLU PRO PHE PRO GLN TYR SER PRO GLU          
SEQRES  13 A  277  LEU HIS PHE PHE ALA PHE ASP ILE LYS TYR SER VAL SER          
SEQRES  14 A  277  GLY ALA GLU GLU ASP PHE VAL LEU LEU GLY TYR ASP GLU          
SEQRES  15 A  277  PHE VAL GLU PHE SER SER LYS VAL PRO ASN LEU LEU TYR          
SEQRES  16 A  277  ALA ARG ALA LEU VAL ARG GLY THR LEU ASP GLU CYS LEU          
SEQRES  17 A  277  ALA PHE ASP VAL GLU ASN PHE MSE THR PRO LEU PRO ALA          
SEQRES  18 A  277  LEU LEU GLY LEU GLY ASN TYR PRO LEU GLU GLY ASN LEU          
SEQRES  19 A  277  ALA GLU GLY VAL VAL ILE ARG HIS VAL ARG ARG GLY ASP          
SEQRES  20 A  277  PRO ALA VAL GLU LYS HIS ASN VAL SER THR ILE ILE LYS          
SEQRES  21 A  277  LEU ARG CYS SER SER PHE MSE GLU LEU LYS HIS PRO GLY          
SEQRES  22 A  277  LYS GLN LYS GLU                                              
MODRES 1XDN MSE A  115  MET  SELENOMETHIONINE                                   
MODRES 1XDN MSE A  263  MET  SELENOMETHIONINE                                   
MODRES 1XDN MSE A  314  MET  SELENOMETHIONINE                                   
HET    MSE  A 115       8                                                       
HET    MSE  A 263       8                                                       
HET    MSE  A 314      10                                                       
HET     MG  A 502       1                                                       
HET    ATP  A 501      31                                                       
HETNAM     MSE SELENOMETHIONINE                                                 
HETNAM      MG MAGNESIUM ION                                                    
HETNAM     ATP ADENOSINE-5'-TRIPHOSPHATE                                        
FORMUL   1  MSE    3(C5 H11 N O2 SE)                                            
FORMUL   2   MG    MG 2+                                                        
FORMUL   3  ATP    C10 H16 N5 O13 P3                                            
FORMUL   4  HOH   *440(H2 O)                                                    
HELIX    1   1 SER A   65  SER A   75  1                                  11    
HELIX    2   2 GLY A   76  GLN A   80  5                                   5    
HELIX    3   3 GLY A  123  ILE A  126  5                                   4    
HELIX    4   4 LEU A  127  GLY A  147  1                                  21    
HELIX    5   5 ALA A  188  VAL A  190  5                                   3    
HELIX    6   6 ALA A  218  GLU A  220  5                                   3    
HELIX    7   7 GLY A  226  LYS A  236  1                                  11    
HELIX    8   8 THR A  250  ALA A  256  1                                   7    
HELIX    9   9 ASP A  258  PHE A  262  5                                   5    
HELIX   10  10 PRO A  265  LEU A  270  1                                   6    
HELIX   11  11 ASP A  294  LYS A  299  1                                   6    
HELIX   12  12 CYS A  310  LEU A  316  1                                   7    
SHEET    1   A 4 VAL A 247  GLY A 249  0                                        
SHEET    2   A 4 TRP A  82  LYS A  87 -1  N  TRP A  82   O  GLY A 249           
SHEET    3   A 4 GLY A 284  HIS A 289 -1  O  VAL A 286   N  CYS A  85           
SHEET    4   A 4 ILE A 305  ARG A 309 -1  O  ILE A 306   N  ILE A 287           
SHEET    1   B 6 GLY A 113  ILE A 114  0                                        
SHEET    2   B 6 HIS A 103  LYS A 110 -1  N  LYS A 110   O  GLY A 113           
SHEET    3   B 6 THR A  91  GLN A 100 -1  N  GLN A 100   O  HIS A 103           
SHEET    4   B 6 ARG A 153  LYS A 164 -1  O  LEU A 160   N  THR A  91           
SHEET    5   B 6 SER A 201  SER A 214 -1  O  LYS A 212   N  VAL A 155           
SHEET    6   B 6 PHE A 222  LEU A 224 -1  O  VAL A 223   N  TYR A 213           
SHEET    1   C 6 GLY A 113  ILE A 114  0                                        
SHEET    2   C 6 HIS A 103  LYS A 110 -1  N  LYS A 110   O  GLY A 113           
SHEET    3   C 6 THR A  91  GLN A 100 -1  N  GLN A 100   O  HIS A 103           
SHEET    4   C 6 ARG A 153  LYS A 164 -1  O  LEU A 160   N  THR A  91           
SHEET    5   C 6 SER A 201  SER A 214 -1  O  LYS A 212   N  VAL A 155           
SHEET    6   C 6 LEU A 241  TYR A 242  1  O  LEU A 241   N  ALA A 208           
SHEET    1   D 2 TRP A 176  THR A 178  0                                        
SHEET    2   D 2 LYS A 184  PRO A 186 -1  O  PHE A 185   N  CYS A 177           
LINK         C   ILE A 114                 N   MSE A 115     1555   1555  1.33  
LINK         C   MSE A 115                 N   ASP A 116     1555   1555  1.33  
LINK         C   PHE A 262                 N   MSE A 263     1555   1555  1.33  
LINK         C   MSE A 263                 N   THR A 264     1555   1555  1.32  
LINK         C   PHE A 313                 N   MSE A 314     1555   1555  1.33  
LINK         C   MSE A 314                 N   GLU A 315     1555   1555  1.33  
LINK         O1G ATP A 501                MG    MG A 502     1555   1555  2.09  
LINK         O2B ATP A 501                MG    MG A 502     1555   1555  2.06  
LINK        MG    MG A 502                 O   HOH A 514     1555   1555  2.07  
LINK        MG    MG A 502                 O   HOH A 520     1555   1555  2.11  
LINK        MG    MG A 502                 O   HOH A 528     1555   1555  2.13  
LINK        MG    MG A 502                 O   HOH A 530     1555   1555  2.04  
CISPEP   1 PHE A  197    PRO A  198          0        -7.28                     
SITE     1 AC1  5 ATP A 501  HOH A 514  HOH A 520  HOH A 528                    
SITE     2 AC1  5 HOH A 530                                                     
SITE     1 AC2 27 TYR A  58  ILE A  59  GLU A  60  ILE A  61                    
SITE     2 AC2 27 GLU A  86  LYS A  87  VAL A  88  ASN A  92                    
SITE     3 AC2 27 ARG A 111  GLU A 159  PHE A 209  VAL A 286                    
SITE     4 AC2 27 LYS A 307  ARG A 309   MG A 502  HOH A 514                    
SITE     5 AC2 27 HOH A 520  HOH A 528  HOH A 530  HOH A 536                    
SITE     6 AC2 27 HOH A 587  HOH A 634  HOH A 650  HOH A 777                    
SITE     7 AC2 27 HOH A 829  HOH A 871  HOH A 886                               
CRYST1   44.911   58.579   52.984  90.00 100.23  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      0.022266  0.000000  0.004018        0.00000                         
SCALE2      0.000000  0.017071  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.019179        0.00000