PDB Short entry for 4JKE
HEADER    RNA BINDING PROTEIN                     09-MAR-13   4JKE              
TITLE     OPEN AND CLOSED FORMS OF T1789P HUMAN PRP8 RNASE H-LIKE DOMAIN WITH   
TITLE    2 BOUND MG ION                                                         
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: PRE-MRNA-PROCESSING-SPLICING FACTOR 8;                     
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 FRAGMENT: PRP8 RNASE H-LIKE DOMAIN, UNP RESIDUES 1769-1990';         
COMPND   5 SYNONYM: 220 KDA U5 SNRNP-SPECIFIC PROTEIN, PRP8 HOMOLOG, SPLICING   
COMPND   6 FACTOR PRP8, P220;                                                   
COMPND   7 ENGINEERED: YES;                                                     
COMPND   8 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_TAXID: 9606;                                                
SOURCE   4 GENE: PRP8, PRPC8, PRPF8;                                            
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21 (DE3) ROSETTA2;                       
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PMALC2-E                                  
KEYWDS    METALLOPROTEIN, CONFORMATIONAL CHANGE, RNA BINDING PROTEIN            
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.J.SCHELLENBERG,T.WU,D.B.RITCHIE,K.A.ATTA,A.M.MACMILLAN              
REVDAT   4   20-SEP-23 4JKE    1       REMARK SEQADV LINK                       
REVDAT   3   26-JUN-13 4JKE    1       JRNL                                     
REVDAT   2   19-JUN-13 4JKE    1       JRNL                                     
REVDAT   1   22-MAY-13 4JKE    0                                                
JRNL        AUTH   M.J.SCHELLENBERG,T.WU,D.B.RITCHIE,S.FICA,J.P.STALEY,         
JRNL        AUTH 2 K.A.ATTA,P.LAPOINTE,A.M.MACMILLAN                            
JRNL        TITL   A CONFORMATIONAL SWITCH IN PRP8 MEDIATES METAL ION           
JRNL        TITL 2 COORDINATION THAT PROMOTES PRE-MRNA EXON LIGATION.           
JRNL        REF    NAT.STRUCT.MOL.BIOL.          V.  20   728 2013              
JRNL        REFN                   ISSN 1545-9993                               
JRNL        PMID   23686287                                                     
JRNL        DOI    10.1038/NSMB.2556                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.65 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC                                               
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) : 1.65                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 32.26                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 95.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 63210                          
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) : 0.156                           
REMARK   3   FREE R VALUE                     : 0.203                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 4.900                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 3095                            
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) : 1.65                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.69                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 4264                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 97.48                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1900                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 224                          
REMARK   3   BIN FREE R VALUE                    : 0.3010                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 3509                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 1                                       
REMARK   3   SOLVENT ATOMS            : 453                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 25.78                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.00000                                              
REMARK   3    B22 (A**2) : -0.03000                                             
REMARK   3    B33 (A**2) : 0.03000                                              
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 OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.108         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.089         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.056         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 3.662         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.969                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.956                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  3629 ; 0.009 ; 0.020       
REMARK   3   BOND LENGTHS OTHERS               (A):  3706 ; 0.001 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  4943 ; 1.291 ; 1.967       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  8462 ; 0.727 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   437 ; 5.627 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):   153 ;41.867 ;24.575       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   669 ;13.442 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):    16 ;16.792 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   585 ; 0.073 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  3940 ; 0.006 ; 0.021       
REMARK   3   GENERAL PLANES OTHERS             (A):   794 ; 0.001 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):  NULL ;  NULL ;  NULL       
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):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):  NULL ;  NULL ;  NULL       
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):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  NULL ;  NULL ;  NULL       
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):  7335 ; 2.617 ; 3.000       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):   138 ;25.239 ; 5.000       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  7567 ;10.484 ; 5.000       
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 : MASK                                                 
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.20                                          
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 4JKE COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 18-MAR-13.                  
REMARK 100 THE DEPOSITION ID IS D_1000078156.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 22-JAN-10                          
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               : ALS                                
REMARK 200  BEAMLINE                       : 8.3.1                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.1158                             
REMARK 200  MONOCHROMATOR                  : SI                                 
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 315                   
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 63481                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.650                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 1.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 95.0                               
REMARK 200  DATA REDUNDANCY                : 3.900                              
REMARK 200  R MERGE                    (I) : 0.04900                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 13.9000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.65                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.71                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 97.8                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.80                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.60700                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: REFMAC 5.6.0117                                       
REMARK 200 STARTING MODEL: PDB ENTRY 3ENB                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 54.01                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.67                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 15% PEG 4000, 300MM MGCL2, 100MM TRIS,   
REMARK 280  PH 7.5, VAPOR DIFFUSION, TEMPERATURE 298K                           
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       38.09050            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       46.52100            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       38.53850            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       46.52100            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       38.09050            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       38.53850            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1, 2                                                    
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                  
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 2                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                  
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 APPLY THE FOLLOWING TO CHAINS: 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  1769                                                      
REMARK 465     GLU A  1770                                                      
REMARK 465     ASN A  1774                                                      
REMARK 465     GLY B  1769                                                      
REMARK 465     HIS B  1791                                                      
REMARK 465     LYS B  1792                                                      
REMARK 465     THR B  1793                                                      
REMARK 465     PHE B  1794                                                      
REMARK 465     GLU B  1795                                                      
REMARK 465     GLY B  1796                                                      
REMARK 465     ASN B  1797                                                      
REMARK 465     LEU B  1798                                                      
REMARK 465     ASP B  1990                                                      
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   OH   TYR A  1930     O    HOH A  2267              2.14            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    PHE A1772       -5.34     71.88                                   
REMARK 500    ALA A1828      110.63    -35.63                                   
REMARK 500    ARG A1832       55.33     39.23                                   
REMARK 500    ASP A1921     -127.35     46.58                                   
REMARK 500    ASN A1946       87.21   -152.75                                   
REMARK 500    SER B1773     -167.21   -115.12                                   
REMARK 500    ASN B1804       24.86   -140.96                                   
REMARK 500    ASP B1921     -126.43     44.08                                   
REMARK 500    ASN B1946       80.89   -156.60                                   
REMARK 500    LYS B1955       76.77   -118.75                                   
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 B2001  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP B1781   OD1                                                    
REMARK 620 2 HOH B2156   O    99.5                                              
REMARK 620 3 HOH B2270   O    81.1 169.7                                        
REMARK 620 4 HOH B2271   O    90.3  90.8  78.9                                  
REMARK 620 5 HOH B2273   O   171.1  89.4  90.4  90.7                            
REMARK 620 N                    1     2     3     4                             
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 2001                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 3ENB   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JK7   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JK8   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JK9   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JKA   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JKB   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JKC   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JKD   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JKF   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JKG   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4JKH   RELATED DB: PDB                                   
DBREF  4JKE A 1769  1990  UNP    Q6P2Q9   PRP8_HUMAN    1769   1990             
DBREF  4JKE B 1769  1990  UNP    Q6P2Q9   PRP8_HUMAN    1769   1990             
SEQADV 4JKE PRO A 1789  UNP  Q6P2Q9    THR  1789 ENGINEERED MUTATION            
SEQADV 4JKE PRO B 1789  UNP  Q6P2Q9    THR  1789 ENGINEERED MUTATION            
SEQRES   1 A  222  GLY GLU LEU PHE SER ASN GLN ILE ILE TRP PHE VAL ASP          
SEQRES   2 A  222  ASP THR ASN VAL TYR ARG VAL PRO ILE HIS LYS THR PHE          
SEQRES   3 A  222  GLU GLY ASN LEU THR THR LYS PRO ILE ASN GLY ALA ILE          
SEQRES   4 A  222  PHE ILE PHE ASN PRO ARG THR GLY GLN LEU PHE LEU LYS          
SEQRES   5 A  222  ILE ILE HIS THR SER VAL TRP ALA GLY GLN LYS ARG LEU          
SEQRES   6 A  222  GLY GLN LEU ALA LYS TRP LYS THR ALA GLU GLU VAL ALA          
SEQRES   7 A  222  ALA LEU ILE ARG SER LEU PRO VAL GLU GLU GLN PRO LYS          
SEQRES   8 A  222  GLN ILE ILE VAL THR ARG LYS GLY MET LEU ASP PRO LEU          
SEQRES   9 A  222  GLU VAL HIS LEU LEU ASP PHE PRO ASN ILE VAL ILE LYS          
SEQRES  10 A  222  GLY SER GLU LEU GLN LEU PRO PHE GLN ALA CYS LEU LYS          
SEQRES  11 A  222  VAL GLU LYS PHE GLY ASP LEU ILE LEU LYS ALA THR GLU          
SEQRES  12 A  222  PRO GLN MET VAL LEU PHE ASN LEU TYR ASP ASP TRP LEU          
SEQRES  13 A  222  LYS THR ILE SER SER TYR THR ALA PHE SER ARG LEU ILE          
SEQRES  14 A  222  LEU ILE LEU ARG ALA LEU HIS VAL ASN ASN ASP ARG ALA          
SEQRES  15 A  222  LYS VAL ILE LEU LYS PRO ASP LYS THR THR ILE THR GLU          
SEQRES  16 A  222  PRO HIS HIS ILE TRP PRO THR LEU THR ASP GLU GLU TRP          
SEQRES  17 A  222  ILE LYS VAL GLU VAL GLN LEU LYS ASP LEU ILE LEU ALA          
SEQRES  18 A  222  ASP                                                          
SEQRES   1 B  222  GLY GLU LEU PHE SER ASN GLN ILE ILE TRP PHE VAL ASP          
SEQRES   2 B  222  ASP THR ASN VAL TYR ARG VAL PRO ILE HIS LYS THR PHE          
SEQRES   3 B  222  GLU GLY ASN LEU THR THR LYS PRO ILE ASN GLY ALA ILE          
SEQRES   4 B  222  PHE ILE PHE ASN PRO ARG THR GLY GLN LEU PHE LEU LYS          
SEQRES   5 B  222  ILE ILE HIS THR SER VAL TRP ALA GLY GLN LYS ARG LEU          
SEQRES   6 B  222  GLY GLN LEU ALA LYS TRP LYS THR ALA GLU GLU VAL ALA          
SEQRES   7 B  222  ALA LEU ILE ARG SER LEU PRO VAL GLU GLU GLN PRO LYS          
SEQRES   8 B  222  GLN ILE ILE VAL THR ARG LYS GLY MET LEU ASP PRO LEU          
SEQRES   9 B  222  GLU VAL HIS LEU LEU ASP PHE PRO ASN ILE VAL ILE LYS          
SEQRES  10 B  222  GLY SER GLU LEU GLN LEU PRO PHE GLN ALA CYS LEU LYS          
SEQRES  11 B  222  VAL GLU LYS PHE GLY ASP LEU ILE LEU LYS ALA THR GLU          
SEQRES  12 B  222  PRO GLN MET VAL LEU PHE ASN LEU TYR ASP ASP TRP LEU          
SEQRES  13 B  222  LYS THR ILE SER SER TYR THR ALA PHE SER ARG LEU ILE          
SEQRES  14 B  222  LEU ILE LEU ARG ALA LEU HIS VAL ASN ASN ASP ARG ALA          
SEQRES  15 B  222  LYS VAL ILE LEU LYS PRO ASP LYS THR THR ILE THR GLU          
SEQRES  16 B  222  PRO HIS HIS ILE TRP PRO THR LEU THR ASP GLU GLU TRP          
SEQRES  17 B  222  ILE LYS VAL GLU VAL GLN LEU LYS ASP LEU ILE LEU ALA          
SEQRES  18 B  222  ASP                                                          
HET     MG  B2001       1                                                       
HETNAM      MG MAGNESIUM ION                                                    
FORMUL   3   MG    MG 2+                                                        
FORMUL   4  HOH   *453(H2 O)                                                    
HELIX    1   1 HIS A 1823  ALA A 1828  5                                   6    
HELIX    2   2 ARG A 1832  LEU A 1852  1                                  21    
HELIX    3   3 PRO A 1853  GLN A 1857  5                                   5    
HELIX    4   4 ARG A 1865  GLY A 1867  5                                   3    
HELIX    5   5 MET A 1868  LEU A 1876  1                                   9    
HELIX    6   6 PRO A 1892  LYS A 1898  5                                   7    
HELIX    7   7 VAL A 1899  ALA A 1909  1                                  11    
HELIX    8   8 ASP A 1922  THR A 1926  5                                   5    
HELIX    9   9 SER A 1928  ASN A 1946  1                                  19    
HELIX   10  10 ASN A 1946  LEU A 1954  1                                   9    
HELIX   11  11 THR A 1972  ASP A 1990  1                                  19    
HELIX   12  12 VAL B 1826  GLN B 1830  5                                   5    
HELIX   13  13 ALA B 1837  LEU B 1852  1                                  16    
HELIX   14  14 PRO B 1853  GLN B 1857  5                                   5    
HELIX   15  15 ARG B 1865  GLY B 1867  5                                   3    
HELIX   16  16 MET B 1868  LEU B 1876  1                                   9    
HELIX   17  17 PRO B 1892  LYS B 1898  5                                   7    
HELIX   18  18 VAL B 1899  ALA B 1909  1                                  11    
HELIX   19  19 ASP B 1922  THR B 1926  5                                   5    
HELIX   20  20 SER B 1928  ASN B 1946  1                                  19    
HELIX   21  21 ASN B 1946  LEU B 1954  1                                   9    
HELIX   22  22 THR B 1972  ALA B 1989  1                                  18    
SHEET    1   A 6 VAL A1883  LYS A1885  0                                        
SHEET    2   A 6 GLN A1860  VAL A1863  1  N  ILE A1861   O  VAL A1883           
SHEET    3   A 6 ILE A1777  ASP A1781  1  N  TRP A1778   O  ILE A1862           
SHEET    4   A 6 GLY A1805  PHE A1810 -1  O  PHE A1810   N  PHE A1779           
SHEET    5   A 6 GLN A1816  ILE A1822 -1  O  PHE A1818   N  ILE A1809           
SHEET    6   A 6 GLN A1913  ASN A1918 -1  O  GLN A1913   N  ILE A1821           
SHEET    1   B 6 VAL B1883  GLY B1886  0                                        
SHEET    2   B 6 GLN B1860  VAL B1863  1  N  ILE B1861   O  LYS B1885           
SHEET    3   B 6 ILE B1777  ASN B1784  1  N  TRP B1778   O  ILE B1862           
SHEET    4   B 6 GLY B1805  PHE B1810 -1  O  PHE B1810   N  PHE B1779           
SHEET    5   B 6 GLN B1816  ILE B1822 -1  O  PHE B1818   N  ILE B1809           
SHEET    6   B 6 GLN B1913  ASN B1918 -1  O  VAL B1915   N  LEU B1819           
LINK         OD1 ASP B1781                MG    MG B2001     1555   1555  2.17  
LINK        MG    MG B2001                 O   HOH B2156     1555   1555  2.20  
LINK        MG    MG B2001                 O   HOH B2270     1555   1555  1.90  
LINK        MG    MG B2001                 O   HOH B2271     1555   1555  2.90  
LINK        MG    MG B2001                 O   HOH B2273     1555   1555  1.84  
SITE     1 AC1  5 ASP B1781  HOH B2156  HOH B2270  HOH B2271                    
SITE     2 AC1  5 HOH B2273                                                     
CRYST1   76.181   77.077   93.042  90.00  90.00  90.00 P 21 21 21    8          
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      0.013127  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.012974  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.010748        0.00000