PDB entry 2a75

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HEADER    HYDROLASE                               04-JUL-05   2A75              
TITLE     TRYPANOSOMA RANGELI SIALIDASE IN COMPLEX WITH 2,3-                    
TITLE    2 DIFLUOROSIALIC ACID (COVALENT INTERMEDIATE)                          
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: SIALIDASE;                                                 
COMPND   3 CHAIN: A;                                                            
COMPND   4 EC: 3.2.1.18;                                                        
COMPND   5 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: TRYPANOSOMA RANGELI;                            
SOURCE   3 ORGANISM_COMMON: MYCOPLASMA;                                         
SOURCE   4 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   5 EXPRESSION_SYSTEM_COMMON: BACTERIA;                                  
SOURCE   6 EXPRESSION_SYSTEM_STRAIN: TOP10;                                     
SOURCE   7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   8 EXPRESSION_SYSTEM_PLASMID: PTRCHISA                                  
KEYWDS    BETA-PROPELLER, COVALENT ENZYME-INTERMEDIATE COMPLEX, BETA-           
KEYWDS   2 SANDWICH                                                             
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.F.AMAYA,P.M.ALZARI,A.BUSCHIAZZO                                     
REVDAT   3   28-FEB-06 2A75    1       JRNL                                     
REVDAT   2   17-JAN-06 2A75    1       JRNL   AUTHOR                            
REVDAT   1   22-NOV-05 2A75    0                                                
JRNL        AUTH   A.G.WATTS,P.OPPEZZO,S.G.WITHERS,P.M.ALZARI,                  
JRNL        AUTH 2 A.BUSCHIAZZO                                                 
JRNL        TITL   STRUCTURAL AND KINETIC ANALYSIS OF TWO COVALENT              
JRNL        TITL 2 SIALOSYL-ENZYME INTERMEDIATES ON TRYPANOSOMA                 
JRNL        TITL 3 RANGELI SIALIDASE.                                           
JRNL        REF    J.BIOL.CHEM.                  V. 281  4149 2006              
JRNL        REFN   ASTM JBCHA3  US ISSN 0021-9258                               
REMARK   1                                                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION. 1.95 ANGSTROMS.                                          
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS                                                  
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES, PANNU,             
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : ENGH & HUBER                                    
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.95                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 29.04                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 85.1                           
REMARK   3   NUMBER OF REFLECTIONS             : 47602                          
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 SET) : 0.174                           
REMARK   3   FREE R VALUE                     : 0.216                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.100                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 2413                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.004                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : NULL                         
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.95                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.04                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 84.30                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 5546                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2020                       
REMARK   3   BIN FREE R VALUE                    : 0.2440                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 5.00                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 292                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.014                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4918                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 31                                      
REMARK   3   SOLVENT ATOMS            : 615                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 11.58                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 2.99000                                              
REMARK   3    B22 (A**2) : -0.51000                                             
REMARK   3    B33 (A**2) : -2.48000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.16                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.03                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.21                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.11                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.014                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.80                            
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 26.10                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.05                            
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : ISOTROPIC                                 
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 1.420 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 2.110 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 2.180 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 3.030 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : CNS BULK SOLVENT MODEL                               
REMARK   3   KSOL        : 0.36                                                 
REMARK   3   BSOL        : 46.14                                                
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 2A75 COMPLIES WITH FORMAT V. 3.0, 1-DEC-2006                         
REMARK   4                                                                      
REMARK   4 THIS IS THE REMEDIATED VERSION OF THIS PDB ENTRY.                    
REMARK   4 REMEDIATED DATA FILE REVISION 3.101 (2007-05-29)                     
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB.                               
REMARK 100 THE RCSB ID CODE IS RCSB033571.                                      
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 02-NOV-2003                        
REMARK 200  TEMPERATURE           (KELVIN) : 100.0                              
REMARK 200  PH                             : 6.50                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : ESRF                               
REMARK 200  BEAMLINE                       : ID29                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.979158                           
REMARK 200  MONOCHROMATOR                  : SI 311 CHANNEL-CUT                 
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC Q210                          
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : MOSFLM                             
REMARK 200  DATA SCALING SOFTWARE          : CCP4 (SCALA)                       
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 47608                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.900                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 46.630                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 1.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 91.2                               
REMARK 200  DATA REDUNDANCY                : 2.900                              
REMARK 200  R MERGE                    (I) : 0.11100                            
REMARK 200  R SYM                      (I) : 0.11100                            
REMARK 200   FOR THE DATA SET  : 3.9000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.90                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.00                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 80.4                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 2.60                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.30000                            
REMARK 200  R SYM FOR SHELL            (I) : 0.30000                            
REMARK 200   FOR SHELL         : 1.700                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS            
REMARK 200 SOFTWARE USED: CNS                                                   
REMARK 200 STARTING MODEL: PDB ENTRY 1N1S                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 54.40                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.70                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 8000, AMMONIUM SULFATE, SODIUM       
REMARK 280  CACODYLATE, PH 6.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE      
REMARK 280  291K                                                                
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21                       
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   1/2-X,-Y,1/2+Z                                          
REMARK 290       3555   -X,1/2+Y,1/2-Z                                          
REMARK 290       4555   1/2+X,1/2-Y,-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       37.10900            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       53.32400            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       48.05100            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       53.32400            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       37.10900            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       48.05100            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 THIS ENTRY CONTAINS THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT             
REMARK 300 WHICH CONSISTS OF 1 CHAIN(S). SEE REMARK 350 FOR                     
REMARK 300 INFORMATION ON GENERATING THE BIOLOGICAL MOLECULE(S).                
REMARK 350                                                                      
REMARK 350 GENERATING THE BIOMOLECULE                                           
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 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     MET A   -13                                                      
REMARK 465     GLY A   -12                                                      
REMARK 465     GLY A   -11                                                      
REMARK 465     SER A   -10                                                      
REMARK 465     HIS A    -9                                                      
REMARK 465     HIS A    -8                                                      
REMARK 465     HIS A    -7                                                      
REMARK 465     HIS A    -6                                                      
REMARK 465     HIS A    -5                                                      
REMARK 465     HIS A    -4                                                      
REMARK 465     GLY A    -3                                                      
REMARK 465     PRO A   406                                                      
REMARK 465     SER A   407                                                      
REMARK 465     GLY A   632                                                      
REMARK 465     GLY A   633                                                      
REMARK 465     ALA A   634                                                      
REMARK 465     GLY A   635                                                      
REMARK 465     THR A   636                                                      
REMARK 465     ALA A   637                                                      
REMARK 465     ALA A   638                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS(M=MODEL NUMBER;            
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     MET A  -2    CB    CG    SD    CE                                
REMARK 470     ALA A  -1    CB                                                  
REMARK 470     SER A  23    OG                                                  
REMARK 470     GLN A 123    CG    CD    OE1   NE2                               
REMARK 470     PRO A 405    CG    CD                                            
REMARK 470     LYS A 408    CG    CD    CE    NZ                                
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),F6.3)                  
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: ENGH AND HUBER, 1991                                
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500    MET A  96   SD    MET A  96   CE     0.114                        
REMARK 500    MET A 627   SD    MET A 627   CE     0.146                        
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: ENGH AND HUBER, 1991                                
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    ALA A  53   N   -  CA  -  C   ANGL. DEV. =-10.9 DEGREES           
REMARK 500    ILE A  82   N   -  CA  -  C   ANGL. DEV. =-16.9 DEGREES           
REMARK 500    VAL A  95   N   -  CA  -  C   ANGL. DEV. =-13.5 DEGREES           
REMARK 500    VAL A 185   N   -  CA  -  C   ANGL. DEV. =-12.6 DEGREES           
REMARK 500    PRO A 194   N   -  CA  -  C   ANGL. DEV. =-13.5 DEGREES           
REMARK 500    VAL A 364   N   -  CA  -  C   ANGL. DEV. =-15.3 DEGREES           
REMARK 500    TRP A 433   N   -  CA  -  C   ANGL. DEV. =-12.2 DEGREES           
REMARK 500    TRP A 465   N   -  CA  -  C   ANGL. DEV. =-12.4 DEGREES           
REMARK 500    GLY A 510   N   -  CA  -  C   ANGL. DEV. =-12.5 DEGREES           
REMARK 500    PHE A 585   N   -  CA  -  C   ANGL. DEV. =-11.4 DEGREES           
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  M RES CSSEQI        PSI       PHI                                   
REMARK 500    VAL A 180      132.19     81.14                                   
REMARK 600                                                                      
REMARK 600 HETEROGEN                                                            
REMARK 600 THE COVALENT SIALO-TYROSINE ADDUCT IS THE PRODUCT OF THE             
REMARK 600 REACTION OF 2,3-DIFLUOROSIALIC ACID WITH THE ENZYME                  
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1N1S   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF TRYPANOSOMA RANGELI SIALIDASE                   
REMARK 900 RELATED ID: 2AGS   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF TRYPANOSOMA RANGELI SIALIDASE IN                
REMARK 900 INCOMPLEX WITH 2-KETO-3-DEOXY-D-GLYCERO-D-GALACTO-2,3_               
REMARK 900 DIFLUORO-NONONIC ACID (2,3-DIFLUORO-KDN)                             
REMARK 900 RELATED ID: 2AH2   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF TRYPANOSOMA CRUZI TRANS-SIALIDASE IN            
REMARK 900 COMPLEX WITH 2,3-DIFLUOROSIALIC ACID (COVALENT INTERMEDIATE)         
REMARK 999                                                                      
REMARK 999 SEQUENCE                                                             
REMARK 999 AUTHORS INDICATE THAT THE SEQUENCE IN THE DATABASE IS                
REMARK 999 INCORRECT                                                            
DBREF  2A75 A    1   638  UNP    O44049   O44049_TRYRA    23    660             
SEQADV 2A75 MET A  -13  UNP  O44049              CLONING ARTIFACT               
SEQADV 2A75 GLY A  -12  UNP  O44049              CLONING ARTIFACT               
SEQADV 2A75 GLY A  -11  UNP  O44049              CLONING ARTIFACT               
SEQADV 2A75 SER A  -10  UNP  O44049              CLONING ARTIFACT               
SEQADV 2A75 HIS A   -9  UNP  O44049              HIS TAG                        
SEQADV 2A75 HIS A   -8  UNP  O44049              HIS TAG                        
SEQADV 2A75 HIS A   -7  UNP  O44049              HIS TAG                        
SEQADV 2A75 HIS A   -6  UNP  O44049              HIS TAG                        
SEQADV 2A75 HIS A   -5  UNP  O44049              HIS TAG                        
SEQADV 2A75 HIS A   -4  UNP  O44049              HIS TAG                        
SEQADV 2A75 GLY A   -3  UNP  O44049              CLONING ARTIFACT               
SEQADV 2A75 MET A   -2  UNP  O44049              CLONING ARTIFACT               
SEQADV 2A75 ALA A   -1  UNP  O44049              CLONING ARTIFACT               
SEQADV 2A75 SER A    0  UNP  O44049              CLONING ARTIFACT               
SEQADV 2A75 ILE A   50  UNP  O44049    THR    72 SEE REMARK 999                 
SEQADV 2A75 ALA A  186  UNP  O44049    GLY   208 SEE REMARK 999                 
SEQADV 2A75 LEU A  372  UNP  O44049    PHE   394 SEE REMARK 999                 
SEQADV 2A75 VAL A  606  UNP  O44049    ILE   628 SEE REMARK 999                 
SEQRES   1 A  652  MET GLY GLY SER HIS HIS HIS HIS HIS HIS GLY MET ALA          
SEQRES   2 A  652  SER LEU ALA PRO GLY SER SER ARG VAL GLU LEU PHE LYS          
SEQRES   3 A  652  ARG LYS ASN SER THR VAL PRO PHE GLU GLU SER ASN GLY          
SEQRES   4 A  652  THR ILE ARG GLU ARG VAL VAL HIS SER PHE ARG ILE PRO          
SEQRES   5 A  652  THR ILE VAL ASN VAL ASP GLY VAL MET VAL ALA ILE ALA          
SEQRES   6 A  652  ASP ALA ARG TYR GLU THR SER PHE ASP ASN SER PHE ILE          
SEQRES   7 A  652  GLU THR ALA VAL LYS TYR SER VAL ASP ASP GLY ALA THR          
SEQRES   8 A  652  TRP ASN THR GLN ILE ALA ILE LYS ASN SER ARG ALA SER          
SEQRES   9 A  652  SER VAL SER ARG VAL MET ASP ALA THR VAL ILE VAL LYS          
SEQRES  10 A  652  GLY ASN LYS LEU TYR ILE LEU VAL GLY SER PHE ASN LYS          
SEQRES  11 A  652  THR ARG ASN SER TRP THR GLN HIS ARG ASP GLY SER ASP          
SEQRES  12 A  652  TRP GLU PRO LEU LEU VAL VAL GLY GLU VAL THR LYS SER          
SEQRES  13 A  652  ALA ALA ASN GLY LYS THR THR ALA THR ILE SER TRP GLY          
SEQRES  14 A  652  LYS PRO VAL SER LEU LYS PRO LEU PHE PRO ALA GLU PHE          
SEQRES  15 A  652  ASP GLY ILE LEU THR LYS GLU PHE ILE GLY GLY VAL GLY          
SEQRES  16 A  652  ALA ALA ILE VAL ALA SER ASN GLY ASN LEU VAL TYR PRO          
SEQRES  17 A  652  VAL GLN ILE ALA ASP MET GLY GLY ARG VAL PHE THR LYS          
SEQRES  18 A  652  ILE MET TYR SER GLU ASP ASP GLY ASN THR TRP LYS PHE          
SEQRES  19 A  652  ALA GLU GLY ARG SER LYS PHE GLY CYS SER GLU PRO ALA          
SEQRES  20 A  652  VAL LEU GLU TRP GLU GLY LYS LEU ILE ILE ASN ASN ARG          
SEQRES  21 A  652  VAL ASP GLY ASN ARG ARG LEU VAL TYR GLU SER SER ASP          
SEQRES  22 A  652  MET GLY LYS THR TRP VAL GLU ALA LEU GLY THR LEU SER          
SEQRES  23 A  652  HIS VAL TRP THR ASN SER PRO THR SER ASN GLN GLN ASP          
SEQRES  24 A  652  CYS GLN SER SER PHE VAL ALA VAL THR ILE GLU GLY LYS          
SEQRES  25 A  652  ARG VAL MET LEU PHE THR HIS PRO LEU ASN LEU LYS GLY          
SEQRES  26 A  652  ARG TRP MET ARG ASP ARG LEU HIS LEU TRP MET THR ASP          
SEQRES  27 A  652  ASN GLN ARG ILE PHE ASP VAL GLY GLN ILE SER ILE GLY          
SEQRES  28 A  652  ASP GLU ASN SER GLY TYR SER SER VAL LEU TYR LYS ASP          
SEQRES  29 A  652  ASP LYS LEU TYR SER LEU HIS GLU ILE ASN THR ASN ASP          
SEQRES  30 A  652  VAL TYR SER LEU VAL PHE VAL ARG LEU ILE GLY GLU LEU          
SEQRES  31 A  652  GLN LEU MET LYS SER VAL VAL ARG THR TRP LYS GLU GLU          
SEQRES  32 A  652  ASP ASN HIS LEU ALA SER ILE CYS THR PRO VAL VAL PRO          
SEQRES  33 A  652  ALA THR PRO PRO SER LYS GLY GLY CYS GLY ALA ALA VAL          
SEQRES  34 A  652  PRO THR ALA GLY LEU VAL GLY PHE LEU SER HIS SER ALA          
SEQRES  35 A  652  ASN GLY SER VAL TRP GLU ASP VAL TYR ARG CYS VAL ASP          
SEQRES  36 A  652  ALA ASN VAL ALA ASN ALA GLU ARG VAL PRO ASN GLY LEU          
SEQRES  37 A  652  LYS PHE ASN GLY VAL GLY GLY GLY ALA VAL TRP PRO VAL          
SEQRES  38 A  652  ALA ARG GLN GLY GLN THR ARG ARG TYR GLN PHE ALA ASN          
SEQRES  39 A  652  TYR ARG PHE THR LEU VAL ALA THR VAL THR ILE ASP GLU          
SEQRES  40 A  652  LEU PRO LYS GLY THR SER PRO LEU LEU GLY ALA GLY LEU          
SEQRES  41 A  652  GLU GLY PRO GLY ASP ALA LYS LEU LEU GLY LEU SER TYR          
SEQRES  42 A  652  ASP LYS ASN ARG GLN TRP ARG PRO LEU TYR GLY ALA ALA          
SEQRES  43 A  652  PRO ALA SER PRO THR GLY SER TRP GLU LEU HIS LYS LYS          
SEQRES  44 A  652  TYR HIS VAL VAL LEU THR MET ALA ASP ARG GLN GLY SER          
SEQRES  45 A  652  VAL TYR VAL ASP GLY GLN PRO LEU ALA GLY SER GLY ASN          
SEQRES  46 A  652  THR VAL VAL ARG GLY ALA THR LEU PRO ASP ILE SER HIS          
SEQRES  47 A  652  PHE TYR ILE GLY GLY PRO ARG SER LYS GLY ALA PRO THR          
SEQRES  48 A  652  ASP SER ARG VAL THR VAL THR ASN VAL VAL LEU TYR ASN          
SEQRES  49 A  652  ARG ARG LEU ASN SER SER GLU ILE ARG THR LEU PHE LEU          
SEQRES  50 A  652  SER GLN ASP MET ILE GLY THR ASP GLY GLY ALA GLY THR          
SEQRES  51 A  652  ALA ALA                                                      
HET    SO4   1801       5                                                       
HET    SO4   1802       5                                                       
HET    FSI  A 700      21                                                       
HETNAM     SO4 SULFATE ION                                                      
HETNAM     FSI 5-(ACETYLAMINO)-2,6-ANHYDRO-3,5-DIDEOXY-3-                       
HETNAM   2 FSI  FLUORONONONIC ACID                                              
HETSYN     FSI 3-FLUOROSIALIC ACID                                              
FORMUL   2  SO4    2(O4 S 2-)                                                   
FORMUL   4  FSI    C11 H18 F N O8                                               
FORMUL   5  HOH   *615(H2 O)                                                    
HELIX    1   1 SER A  120  HIS A  124  5                                   5    
HELIX    2   2 LYS A  161  PHE A  164  5                                   4    
HELIX    3   3 LEU A  372  SER A  395  1                                  24    
HELIX    4   4 ALA A  468  GLY A  471  5                                   4    
HELIX    5   5 TYR A  476  TYR A  481  5                                   6    
HELIX    6   6 ASN A  614  SER A  624  1                                  11    
SHEET    1   A 4 SER A   6  PHE A  11  0                                        
SHEET    2   A 4 VAL A 364  ARG A 371 -1  O  PHE A 369   N  VAL A   8           
SHEET    3   A 4 LYS A 352  THR A 361 -1  N  SER A 355   O  VAL A 370           
SHEET    4   A 4 SER A 344  LYS A 349 -1  N  LEU A 347   O  TYR A 354           
SHEET    1   B 2 THR A  17  GLU A  21  0                                        
SHEET    2   B 2 ILE A  27  VAL A  31 -1  O  ARG A  28   N  PHE A  20           
SHEET    1   C 4 SER A  34  VAL A  43  0                                        
SHEET    2   C 4 VAL A  46  ARG A  54 -1  O  ILE A  50   N  THR A  39           
SHEET    3   C 4 ILE A  64  SER A  71 -1  O  LYS A  69   N  ALA A  49           
SHEET    4   C 4 ASN A  79  ILE A  84 -1  O  GLN A  81   N  VAL A  68           
SHEET    1   D 3 LYS A 147  TRP A 154  0                                        
SHEET    2   D 3 TRP A 130  ALA A 144 -1  N  SER A 142   O  THR A 149           
SHEET    3   D 3 VAL A 158  SER A 159 -1  O  VAL A 158   N  LEU A 134           
SHEET    1   E 5 LYS A 147  TRP A 154  0                                        
SHEET    2   E 5 TRP A 130  ALA A 144 -1  N  SER A 142   O  THR A 149           
SHEET    3   E 5 LYS A 106  PHE A 114 -1  N  ILE A 109   O  VAL A 135           
SHEET    4   E 5 ARG A  94  LYS A 103 -1  N  MET A  96   O  GLY A 112           
SHEET    5   E 5 GLY A 181  ALA A 182  1  O  GLY A 181   N  VAL A 100           
SHEET    1   F 4 GLU A 167  PHE A 168  0                                        
SHEET    2   F 4 ILE A 171  GLY A 178 -1  O  ILE A 171   N  PHE A 168           
SHEET    3   F 4 LEU A 191  ASP A 199 -1  O  ALA A 198   N  GLU A 175           
SHEET    4   F 4 ILE A 184  VAL A 185 -1  N  ILE A 184   O  VAL A 192           
SHEET    1   G 5 GLU A 167  PHE A 168  0                                        
SHEET    2   G 5 ILE A 171  GLY A 178 -1  O  ILE A 171   N  PHE A 168           
SHEET    3   G 5 LEU A 191  ASP A 199 -1  O  ALA A 198   N  GLU A 175           
SHEET    4   G 5 VAL A 204  SER A 211 -1  O  MET A 209   N  TYR A 193           
SHEET    5   G 5 LYS A 219  PHE A 220 -1  O  LYS A 219   N  TYR A 210           
SHEET    1   H 4 SER A 230  TRP A 237  0                                        
SHEET    2   H 4 LYS A 240  ARG A 246 -1  O  LYS A 240   N  TRP A 237           
SHEET    3   H 4 VAL A 254  SER A 257 -1  O  TYR A 255   N  ILE A 243           
SHEET    4   H 4 VAL A 265  GLU A 266 -1  O  VAL A 265   N  GLU A 256           
SHEET    1   I 4 PHE A 290  ILE A 295  0                                        
SHEET    2   I 4 LYS A 298  PRO A 306 -1  O  VAL A 300   N  VAL A 293           
SHEET    3   I 4 LEU A 318  THR A 323 -1  O  THR A 323   N  MET A 301           
SHEET    4   I 4 ILE A 328  GLN A 333 -1  O  PHE A 329   N  MET A 322           
SHEET    1   J 7 ALA A 447  VAL A 450  0                                        
SHEET    2   J 7 GLY A 453  PHE A 456 -1  O  LYS A 455   N  GLU A 448           
SHEET    3   J 7 VAL A 601  TYR A 609 -1  O  VAL A 601   N  PHE A 456           
SHEET    4   J 7 PHE A 483  ILE A 491 -1  N  THR A 488   O  THR A 604           
SHEET    5   J 7 LYS A 545  ALA A 553 -1  O  VAL A 548   N  ALA A 487           
SHEET    6   J 7 GLN A 556  VAL A 561 -1  O  TYR A 560   N  VAL A 549           
SHEET    7   J 7 GLN A 564  PRO A 565 -1  O  GLN A 564   N  VAL A 561           
SHEET    1   K13 TRP A 525  TYR A 529  0                                        
SHEET    2   K13 LYS A 513  ASP A 520 -1  N  GLY A 516   O  LEU A 528           
SHEET    3   K13 THR A 498  LEU A 506 -1  N  ALA A 504   O  LEU A 514           
SHEET    4   K13 ILE A 582  GLY A 588 -1  O  GLY A 588   N  LEU A 501           
SHEET    5   K13 GLY A 462  PRO A 466 -1  N  ALA A 463   O  ILE A 587           
SHEET    6   K13 ALA A 442  ALA A 445 -1  N  ASN A 443   O  VAL A 464           
SHEET    7   K13 VAL A 432  ASP A 435 -1  N  TRP A 433   O  ALA A 442           
SHEET    8   K13 LEU A 420  ALA A 428 -1  N  SER A 427   O  GLU A 434           
SHEET    9   K13 VAL A 601  TYR A 609 -1  O  LEU A 608   N  VAL A 421           
SHEET   10   K13 PHE A 483  ILE A 491 -1  N  THR A 488   O  THR A 604           
SHEET   11   K13 LYS A 545  ALA A 553 -1  O  VAL A 548   N  ALA A 487           
SHEET   12   K13 GLN A 556  VAL A 561 -1  O  TYR A 560   N  VAL A 549           
SHEET   13   K13 ASN A 571  THR A 572 -1  O  ASN A 571   N  GLY A 557           
SSBOND   1 CYS A  397    CYS A  411                                             
LINK         OH  TYR A 343                 C2  FSI A 700                        
CRYST1   74.218   96.102  106.648  90.00  90.00  90.00 P 21 21 21    4          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.013474  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.010406  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.009377        0.00000