HEADER    HYDROLASE                               18-SEP-02   1MR5              
TITLE     ORTHORHOMBIC FORM OF TRYPANOSOMA CRUZI TRANS-SIALIDASE                
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: TRANS-SIALIDASE;                                           
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: ENZYMATIC GLOBULAR CORE;                                   
COMPND   5 EC: 3.2.1.18;                                                        
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: TRYPANOSOMA CRUZI;                              
SOURCE   3 ORGANISM_TAXID: 5693;                                                
SOURCE   4 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   6 EXPRESSION_SYSTEM_STRAIN: DH5A-FT;                                   
SOURCE   7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   8 EXPRESSION_SYSTEM_PLASMID: PTRCHISA                                  
KEYWDS    TRANSGLYCOSYLATION, BETA-PROPELLER, PROTEIN-CARBOHYDRATE              
KEYWDS   2 INTERACTIONS, SIALIDASE, HYDROLASE                                   
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    A.BUSCHIAZZO,M.F.AMAYA,M.L.CREMONA,A.C.FRASCH,P.M.ALZARI              
REVDAT   4   13-NOV-24 1MR5    1       REMARK                                   
REVDAT   3   27-OCT-21 1MR5    1       SEQADV                                   
REVDAT   2   24-FEB-09 1MR5    1       VERSN                                    
REVDAT   1   18-MAR-03 1MR5    0                                                
JRNL        AUTH   A.BUSCHIAZZO,M.F.AMAYA,M.L.CREMONA,A.C.FRASCH,P.M.ALZARI     
JRNL        TITL   THE CRYSTAL STRUCTURE AND MODE OF ACTION OF TRANS-SIALIDASE, 
JRNL        TITL 2 A KEY ENZYME IN TRYPANOSOMA CRUZI PATHOGENESIS               
JRNL        REF    MOL.CELL                      V.  10   757 2002              
JRNL        REFN                   ISSN 1097-2765                               
JRNL        PMID   12419220                                                     
JRNL        DOI    10.1016/S1097-2765(02)00680-9                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.25 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.0                                           
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) : 2.25                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 27.84                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.5                           
REMARK   3   NUMBER OF REFLECTIONS             : 31466                          
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) : 0.221                           
REMARK   3   R VALUE            (WORKING SET) : 0.218                           
REMARK   3   FREE R VALUE                     : 0.274                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1667                            
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) : 2.25                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.31                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 2194                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2930                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 113                          
REMARK   3   BIN FREE R VALUE                    : 0.4950                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4825                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 132                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 20.54                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.89000                                              
REMARK   3    B22 (A**2) : -0.16000                                             
REMARK   3    B33 (A**2) : -0.73000                                             
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): NULL          
REMARK   3   ESU BASED ON FREE R VALUE                       (A): NULL          
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): NULL          
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): NULL          
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.910                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.865                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  4958 ; 0.021 ; 0.021       
REMARK   3   BOND LENGTHS OTHERS               (A):  4431 ; 0.001 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  6739 ; 1.965 ; 1.935       
REMARK   3   BOND ANGLES OTHERS          (DEGREES): 10304 ; 0.863 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   627 ; 5.242 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   876 ;18.806 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   741 ; 0.114 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  5557 ; 0.008 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  1035 ; 0.002 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  1039 ; 0.226 ; 0.300       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  4494 ; 0.222 ; 0.300       
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):   379 ; 0.146 ; 0.500       
REMARK   3   H-BOND (X...Y) OTHERS             (A):     3 ; 0.096 ; 0.500       
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):     4 ; 0.367 ; 0.300       
REMARK   3   SYMMETRY VDW OTHERS               (A):    24 ; 0.240 ; 0.300       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):     4 ; 0.314 ; 0.500       
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):  3083 ; 0.979 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  4981 ; 1.684 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  1875 ; 2.631 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  1758 ; 4.131 ; 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: NULL                                      
REMARK   4                                                                      
REMARK   4 1MR5 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 18-SEP-02.                  
REMARK 100 THE DEPOSITION ID IS D_1000017126.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 07-MAY-01                          
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               : ESRF                               
REMARK 200  BEAMLINE                       : ID14-1                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.934                              
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 : MOSFLM                             
REMARK 200  DATA SCALING SOFTWARE          : SCALA, CCP4 (SCALA)                
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 33232                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.250                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.7                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : 0.05900                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : NULL                               
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.25                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.37                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 99.4                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : 0.22800                            
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: AMORE                                                 
REMARK 200 STARTING MODEL: PDB ID 1MZ5                                          
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 48.79                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.40                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 4000, TRISHCL, ISOPROPANOL, PH       
REMARK 280  7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 291K                
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2                        
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z                                                 
REMARK 290       3555   -X+1/2,Y+1/2,-Z                                         
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        0.00000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000       43.51450            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       44.01050            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       43.51450            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       44.01050            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 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     MET A    -2                                                      
REMARK 465     ALA A    -1                                                      
REMARK 465     SER A     0                                                      
REMARK 465     LEU A     1                                                      
REMARK 465     ALA A     2                                                      
REMARK 465     PRO A     3                                                      
REMARK 465     ASP A   400                                                      
REMARK 465     PRO A   401                                                      
REMARK 465     ALA A   402                                                      
REMARK 465     ALA A   403                                                      
REMARK 465     SER A   404                                                      
REMARK 465     SER A   405                                                      
REMARK 465     SER A   406                                                      
REMARK 465     GLU A   407                                                      
REMARK 465     ARG A   408                                                      
REMARK 465     ASP A   634                                                      
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     LYS A 511    CG   CD   CE   NZ                                   
REMARK 470     GLU A 576    CG   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   O    SER A   390     OG   SER A   394              2.15            
REMARK 500   OH   TYR A   347     OD2  ASP A   350              2.16            
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    ARG A   7   NE  -  CZ  -  NH1 ANGL. DEV. =   3.6 DEGREES          
REMARK 500    ASP A  43   CB  -  CG  -  OD2 ANGL. DEV. =   7.6 DEGREES          
REMARK 500    ASP A  51   CB  -  CA  -  C   ANGL. DEV. = -12.0 DEGREES          
REMARK 500    ASP A  59   CB  -  CG  -  OD2 ANGL. DEV. =   5.7 DEGREES          
REMARK 500    ASP A  73   CB  -  CG  -  OD1 ANGL. DEV. =  -7.1 DEGREES          
REMARK 500    ASP A  73   CB  -  CG  -  OD2 ANGL. DEV. =   6.9 DEGREES          
REMARK 500    ASP A  96   CB  -  CG  -  OD2 ANGL. DEV. =   8.9 DEGREES          
REMARK 500    ASP A 212   CB  -  CG  -  OD2 ANGL. DEV. =   7.9 DEGREES          
REMARK 500    ARG A 250   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.2 DEGREES          
REMARK 500    ASP A 258   CB  -  CG  -  OD2 ANGL. DEV. =   8.0 DEGREES          
REMARK 500    ARG A 314   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.1 DEGREES          
REMARK 500    ARG A 376   NE  -  CZ  -  NH1 ANGL. DEV. =  -4.0 DEGREES          
REMARK 500    ARG A 376   NE  -  CZ  -  NH2 ANGL. DEV. =   3.1 DEGREES          
REMARK 500    ARG A 437   NE  -  CZ  -  NH1 ANGL. DEV. =  -4.0 DEGREES          
REMARK 500    LEU A 620   CB  -  CG  -  CD1 ANGL. DEV. =  10.2 DEGREES          
REMARK 500    ASP A 625   CB  -  CG  -  OD2 ANGL. DEV. =   5.8 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    SER A  15      -60.89   -148.44                                   
REMARK 500    ASP A  43       57.55     37.90                                   
REMARK 500    ASP A  96       63.55     39.69                                   
REMARK 500    ASN A 104       20.51    -79.75                                   
REMARK 500    ASN A 173      -72.71   -119.64                                   
REMARK 500    ALA A 179      171.66     79.27                                   
REMARK 500    ALA A 182     -157.21   -104.63                                   
REMARK 500    GLU A 230       64.27     28.31                                   
REMARK 500    THR A 269      -70.35   -142.46                                   
REMARK 500    ARG A 311     -134.85     51.37                                   
REMARK 500    ARG A 316       61.33     73.59                                   
REMARK 500    GLN A 325      -62.57   -131.46                                   
REMARK 500    ALA A 341      -67.15    -96.13                                   
REMARK 500    PRO A 398      -72.34    -35.05                                   
REMARK 500    SER A 424     -136.18   -135.89                                   
REMARK 500    VAL A 466      -98.64   -116.85                                   
REMARK 500    ASP A 575      -79.42    -52.08                                   
REMARK 500    GLU A 576      -75.37    -24.87                                   
REMARK 500    ASN A 609       32.58    -95.16                                   
REMARK 500    HIS A 632       24.96    -63.95                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1MS0   RELATED DB: PDB                                   
REMARK 900 MONOCLINIC FORM OF TRYPANOSOMA CRUZI TRANS-SIALIDASE, IN COMPLEX     
REMARK 900 WITH 3-DEOXY-2,3-DEHYDRO-N-ACETYLNEURAMINIC ACID (DANA)AND LACTOSE   
REMARK 900 RELATED ID: 1MS1   RELATED DB: PDB                                   
REMARK 900 MONOCLINIC FORM OF TRYPANOSOMA CRUZI TRANS-SIALIDASE, IN COMPLEX     
REMARK 900 WITH 3-DEOXY-2,3-DEHYDRO-N-ACETYLNEURAMINIC ACID (DANA)              
REMARK 900 RELATED ID: 1MS3   RELATED DB: PDB                                   
REMARK 900 MONOCLINIC FORM OF TRYPANOSOMA CRUZI TRANS-SIALIDASE                 
REMARK 900 RELATED ID: 1MS4   RELATED DB: PDB                                   
REMARK 900 TRICLINIC FORM OF TRYPANOSOMA CRUZI TRANS-SIALIDASE                  
REMARK 900 RELATED ID: 1MS5   RELATED DB: PDB                                   
REMARK 900 TRICLINIC FORM OF TRYPANOSOMA CRUZI TRANS-SIALIDASE, SOAKED WITH N-  
REMARK 900 ACETYLNEURAMINYL-A-2,3-THIO-GALACTOSIDE (NA-S-GAL)                   
REMARK 900 RELATED ID: 1MS8   RELATED DB: PDB                                   
REMARK 900 TRICLINIC FORM OF TRYPANOSOMA CRUZI TRANS-SIALIDASE, IN COMPLEX      
REMARK 900 WITH 3-DEOXY-2,3-DEHYDRO-N-ACETYLNEURAMINIC ACID (DANA)              
REMARK 900 RELATED ID: 1MS9   RELATED DB: PDB                                   
REMARK 900 TRICLINIC FORM OF TRYPANOSOMA CRUZI TRANS-SIALIDASE, IN COMPLEX      
REMARK 900 WITH LACTOSE                                                         
REMARK 900 RELATED ID: 1MZ5   RELATED DB: PDB                                   
REMARK 900 TRYPANOSOMA RANGELI SIALIDASE                                        
REMARK 900 RELATED ID: 1MZ6   RELATED DB: PDB                                   
REMARK 900 TRYPANOSOMA RANGELI SIALIDASE IN COMPLEX WITH INHIBITOR DANA         
REMARK 999                                                                      
REMARK 999 SEQUENCE                                                             
REMARK 999 AUTHOR INDICATES THAT THE SEQUENCE IN THE DATABASE                   
REMARK 999 IS INCORRECT                                                         
DBREF  1MR5 A    1   634  UNP    Q26966   Q26966_TRYCR     2    635             
SEQADV 1MR5 MET A  -13  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 GLY A  -12  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 GLY A  -11  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 SER A  -10  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 HIS A   -9  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 HIS A   -8  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 HIS A   -7  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 HIS A   -6  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 HIS A   -5  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 HIS A   -4  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 GLY A   -3  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 MET A   -2  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 ALA A   -1  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 SER A    0  UNP  Q26966              EXPRESSION TAG                 
SEQADV 1MR5 PHE A   58  UNP  Q26966    ASN    59 ENGINEERED MUTATION            
SEQADV 1MR5 THR A  262  UNP  Q26966    SER   263 SEE REMARK 999                 
SEQADV 1MR5 HIS A  476  UNP  Q26966    ARG   477 SEE REMARK 999                 
SEQADV 1MR5 LEU A  484  UNP  Q26966    VAL   485 SEE REMARK 999                 
SEQADV 1MR5 LYS A  495  UNP  Q26966    SER   496 ENGINEERED MUTATION            
SEQADV 1MR5 GLY A  496  UNP  Q26966    VAL   497 ENGINEERED MUTATION            
SEQADV 1MR5 LYS A  520  UNP  Q26966    GLU   521 ENGINEERED MUTATION            
SEQADV 1MR5 VAL A  558  UNP  Q26966    GLU   559 SEE REMARK 999                 
SEQADV 1MR5 GLY A  593  UNP  Q26966    ASP   594 ENGINEERED MUTATION            
SEQADV 1MR5 ASP A  597  UNP  Q26966    ILE   598 ENGINEERED MUTATION            
SEQADV 1MR5 ARG A  599  UNP  Q26966    HIS   600 ENGINEERED MUTATION            
SEQRES   1 A  648  MET GLY GLY SER HIS HIS HIS HIS HIS HIS GLY MET ALA          
SEQRES   2 A  648  SER LEU ALA PRO GLY SER SER ARG VAL GLU LEU PHE LYS          
SEQRES   3 A  648  ARG GLN SER SER LYS VAL PRO PHE GLU LYS ASP GLY LYS          
SEQRES   4 A  648  VAL THR GLU ARG VAL VAL HIS SER PHE ARG LEU PRO ALA          
SEQRES   5 A  648  LEU VAL ASN VAL ASP GLY VAL MET VAL ALA ILE ALA ASP          
SEQRES   6 A  648  ALA ARG TYR GLU THR SER PHE ASP ASN SER LEU ILE ASP          
SEQRES   7 A  648  THR VAL ALA LYS TYR SER VAL ASP ASP GLY GLU THR TRP          
SEQRES   8 A  648  GLU THR GLN ILE ALA ILE LYS ASN SER ARG ALA SER SER          
SEQRES   9 A  648  VAL SER ARG VAL VAL ASP PRO THR VAL ILE VAL LYS GLY          
SEQRES  10 A  648  ASN LYS LEU TYR VAL LEU VAL GLY SER TYR ASN SER SER          
SEQRES  11 A  648  ARG SER TYR TRP THR SER HIS GLY ASP ALA ARG ASP TRP          
SEQRES  12 A  648  ASP ILE LEU LEU ALA VAL GLY GLU VAL THR LYS SER THR          
SEQRES  13 A  648  ALA GLY GLY LYS ILE THR ALA SER ILE LYS TRP GLY SER          
SEQRES  14 A  648  PRO VAL SER LEU LYS GLU PHE PHE PRO ALA GLU MET GLU          
SEQRES  15 A  648  GLY MET HIS THR ASN GLN PHE LEU GLY GLY ALA GLY VAL          
SEQRES  16 A  648  ALA ILE VAL ALA SER ASN GLY ASN LEU VAL TYR PRO VAL          
SEQRES  17 A  648  GLN VAL THR ASN LYS LYS LYS GLN VAL PHE SER LYS ILE          
SEQRES  18 A  648  PHE TYR SER GLU ASP GLU GLY LYS THR TRP LYS PHE GLY          
SEQRES  19 A  648  LYS GLY ARG SER ALA PHE GLY CYS SER GLU PRO VAL ALA          
SEQRES  20 A  648  LEU GLU TRP GLU GLY LYS LEU ILE ILE ASN THR ARG VAL          
SEQRES  21 A  648  ASP TYR ARG ARG ARG LEU VAL TYR GLU SER SER ASP MET          
SEQRES  22 A  648  GLY ASN THR TRP LEU GLU ALA VAL GLY THR LEU SER ARG          
SEQRES  23 A  648  VAL TRP GLY PRO SER PRO LYS SER ASN GLN PRO GLY SER          
SEQRES  24 A  648  GLN SER SER PHE THR ALA VAL THR ILE GLU GLY MET ARG          
SEQRES  25 A  648  VAL MET LEU PHE THR HIS PRO LEU ASN PHE LYS GLY ARG          
SEQRES  26 A  648  TRP LEU ARG ASP ARG LEU ASN LEU TRP LEU THR ASP ASN          
SEQRES  27 A  648  GLN ARG ILE TYR ASN VAL GLY GLN VAL SER ILE GLY ASP          
SEQRES  28 A  648  GLU ASN SER ALA TYR SER SER VAL LEU TYR LYS ASP ASP          
SEQRES  29 A  648  LYS LEU TYR CYS LEU HIS GLU ILE ASN SER ASN GLU VAL          
SEQRES  30 A  648  TYR SER LEU VAL PHE ALA ARG LEU VAL GLY GLU LEU ARG          
SEQRES  31 A  648  ILE ILE LYS SER VAL LEU GLN SER TRP LYS ASN TRP ASP          
SEQRES  32 A  648  SER HIS LEU SER SER ILE CYS THR PRO ALA ASP PRO ALA          
SEQRES  33 A  648  ALA SER SER SER GLU ARG GLY CYS GLY PRO ALA VAL THR          
SEQRES  34 A  648  THR VAL GLY LEU VAL GLY PHE LEU SER HIS SER ALA THR          
SEQRES  35 A  648  LYS THR GLU TRP GLU ASP ALA TYR ARG CYS VAL ASN ALA          
SEQRES  36 A  648  SER THR ALA ASN ALA GLU ARG VAL PRO ASN GLY LEU LYS          
SEQRES  37 A  648  PHE ALA GLY VAL GLY GLY GLY ALA LEU TRP PRO VAL SER          
SEQRES  38 A  648  GLN GLN GLY GLN ASN GLN ARG TYR HIS PHE ALA ASN HIS          
SEQRES  39 A  648  ALA PHE THR LEU VAL ALA SER VAL THR ILE HIS GLU VAL          
SEQRES  40 A  648  PRO LYS GLY ALA SER PRO LEU LEU GLY ALA SER LEU ASP          
SEQRES  41 A  648  SER SER GLY GLY LYS LYS LEU LEU GLY LEU SER TYR ASP          
SEQRES  42 A  648  LYS ARG HIS GLN TRP GLN PRO ILE TYR GLY SER THR PRO          
SEQRES  43 A  648  VAL THR PRO THR GLY SER TRP GLU MET GLY LYS ARG TYR          
SEQRES  44 A  648  HIS VAL VAL LEU THR MET ALA ASN LYS ILE GLY SER VAL          
SEQRES  45 A  648  TYR ILE ASP GLY GLU PRO LEU GLU GLY SER GLY GLN THR          
SEQRES  46 A  648  VAL VAL PRO ASP GLU ARG THR PRO ASP ILE SER HIS PHE          
SEQRES  47 A  648  TYR VAL GLY GLY TYR LYS ARG SER GLY MET PRO THR ASP          
SEQRES  48 A  648  SER ARG VAL THR VAL ASN ASN VAL LEU LEU TYR ASN ARG          
SEQRES  49 A  648  GLN LEU ASN ALA GLU GLU ILE ARG THR LEU PHE LEU SER          
SEQRES  50 A  648  GLN ASP LEU ILE GLY THR GLU ALA HIS MET ASP                  
FORMUL   2  HOH   *132(H2 O)                                                    
HELIX    1   1 TYR A  119  HIS A  123  5                                   5    
HELIX    2   2 THR A  142  LYS A  146  5                                   5    
HELIX    3   3 LYS A  160  PHE A  163  5                                   4    
HELIX    4   4 LEU A  371  SER A  394  1                                  24    
HELIX    5   5 SER A  467  GLY A  470  5                                   4    
HELIX    6   6 TYR A  475  HIS A  480  5                                   6    
HELIX    7   7 ASN A  613  GLY A  628  1                                  16    
SHEET    1   A 4 SER A   6  PHE A  11  0                                        
SHEET    2   A 4 VAL A 363  ARG A 370 -1  O  LEU A 366   N  PHE A  11           
SHEET    3   A 4 LYS A 351  SER A 360 -1  O  CYS A 354   N  ALA A 369           
SHEET    4   A 4 SER A 343  LYS A 348 -1  O  SER A 344   N  LEU A 355           
SHEET    1   B 2 LYS A  17  LYS A  22  0                                        
SHEET    2   B 2 LYS A  25  VAL A  30 -1  O  LYS A  25   N  LYS A  22           
SHEET    1   C 4 SER A  33  VAL A  42  0                                        
SHEET    2   C 4 VAL A  45  ARG A  53 -1  O  VAL A  45   N  VAL A  42           
SHEET    3   C 4 ILE A  63  SER A  70 -1  O  ASP A  64   N  ALA A  52           
SHEET    4   C 4 GLU A  78  ILE A  83 -1  N  GLU A  78   O  TYR A  69           
SHEET    1   D 7 THR A 148  TRP A 153  0                                        
SHEET    2   D 7 TRP A 129  SER A 141 -1  N  GLU A 137   O  LYS A 152           
SHEET    3   D 7 VAL A 157  SER A 158 -1  N  VAL A 157   O  LEU A 133           
SHEET    4   D 7 TRP A 129  SER A 141 -1  O  LEU A 133   N  VAL A 157           
SHEET    5   D 7 LYS A 105  TYR A 113 -1  N  LEU A 106   O  GLY A 136           
SHEET    6   D 7 ARG A  93  LYS A 102 -1  O  ARG A  93   N  TYR A 113           
SHEET    7   D 7 GLY A 180  VAL A 181  1  O  GLY A 180   N  VAL A  99           
SHEET    1   E 7 GLU A 166  MET A 167  0                                        
SHEET    2   E 7 MET A 170  GLY A 177 -1  N  MET A 170   O  MET A 167           
SHEET    3   E 7 LEU A 190  ASN A 198 -1  O  GLN A 195   N  LEU A 176           
SHEET    4   E 7 ILE A 183  VAL A 184 -1  O  ILE A 183   N  VAL A 191           
SHEET    5   E 7 LEU A 190  ASN A 198 -1  N  VAL A 191   O  ILE A 183           
SHEET    6   E 7 VAL A 203  SER A 210 -1  O  PHE A 204   N  VAL A 196           
SHEET    7   E 7 LYS A 218  PHE A 219 -1  O  LYS A 218   N  TYR A 209           
SHEET    1   F 4 CYS A 228  TRP A 236  0                                        
SHEET    2   F 4 LYS A 239  VAL A 246 -1  O  LYS A 239   N  TRP A 236           
SHEET    3   F 4 VAL A 253  SER A 256 -1  O  TYR A 254   N  ILE A 242           
SHEET    4   F 4 LEU A 264  GLU A 265 -1  O  LEU A 264   N  GLU A 255           
SHEET    1   G 4 PHE A 289  ILE A 294  0                                        
SHEET    2   G 4 MET A 297  PRO A 305 -1  O  MET A 297   N  ILE A 294           
SHEET    3   G 4 LEU A 317  THR A 322 -1  N  ASN A 318   O  HIS A 304           
SHEET    4   G 4 ILE A 327  GLN A 332 -1  N  TYR A 328   O  LEU A 321           
SHEET    1   H19 TRP A 524  TYR A 528  0                                        
SHEET    2   H19 LYS A 512  TYR A 518 -1  O  GLY A 515   N  ILE A 527           
SHEET    3   H19 SER A 498  SER A 504 -1  N  SER A 498   O  TYR A 518           
SHEET    4   H19 HIS A 583  VAL A 586 -1  O  HIS A 583   N  SER A 504           
SHEET    5   H19 GLY A 461  PRO A 465 -1  O  ALA A 462   N  VAL A 586           
SHEET    6   H19 ALA A 441  ALA A 444 -1  O  SER A 442   N  LEU A 463           
SHEET    7   H19 GLU A 431  ASP A 434 -1  N  TRP A 432   O  ALA A 441           
SHEET    8   H19 LEU A 419  ALA A 427 -1  N  SER A 424   O  GLU A 433           
SHEET    9   H19 VAL A 600  TYR A 608 -1  N  VAL A 605   O  LEU A 423           
SHEET   10   H19 GLY A 452  PHE A 455 -1  O  LEU A 453   N  VAL A 602           
SHEET   11   H19 ALA A 446  VAL A 449 -1  O  GLU A 447   N  LYS A 454           
SHEET   12   H19 GLY A 452  PHE A 455 -1  N  GLY A 452   O  VAL A 449           
SHEET   13   H19 VAL A 600  TYR A 608 -1  O  VAL A 600   N  PHE A 455           
SHEET   14   H19 PHE A 482  ILE A 490 -1  O  THR A 483   N  TYR A 608           
SHEET   15   H19 TYR A 545  ALA A 552 -1  N  TYR A 545   O  VAL A 488           
SHEET   16   H19 ILE A 555  ILE A 560 -1  N  ILE A 555   O  ALA A 552           
SHEET   17   H19 GLU A 563  PRO A 564 -1  O  GLU A 563   N  ILE A 560           
SHEET   18   H19 ILE A 555  ILE A 560 -1  N  ILE A 560   O  GLU A 563           
SHEET   19   H19 GLN A 570  THR A 571 -1  O  GLN A 570   N  GLY A 556           
SSBOND   1 CYS A  396    CYS A  410                          1555   1555  2.01  
CRYST1   87.029   88.021   89.564  90.00  90.00  90.00 P 21 21 2     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      0.011490  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.011361  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.011165        0.00000