HEADER    HYDROLASE                               26-SEP-94   1INX              
TITLE     A SIALIC ACID DERIVED PHOSPHONATE ANALOG INHIBITS DIFFERENT STRAINS OF
TITLE    2 INFLUENZA VIRUS NEURAMINIDASE WITH DIFFERENT EFFICIENCIES            
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: INFLUENZA A SUBTYPE N2 NEURAMINIDASE;                      
COMPND   3 CHAIN: A;                                                            
COMPND   4 EC: 3.2.1.18;                                                        
COMPND   5 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: INFLUENZA A VIRUS;                              
SOURCE   3 ORGANISM_TAXID: 11320;                                               
SOURCE   4 CELL_LINE: 293;                                                      
SOURCE   5 EXPRESSION_SYSTEM_STRAIN: 293                                        
KEYWDS    HYDROLASE, O-GLYCOSYL, NEURAMINIDASE, SIALIDASE                       
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    C.L.WHITE,M.N.JANAKIRAMAN,W.G.LAVER,C.PHILIPPON,A.VASELLA,G.M.AIR,    
AUTHOR   2 M.LUO                                                                
REVDAT   6   30-OCT-24 1INX    1       HETSYN                                   
REVDAT   5   29-JUL-20 1INX    1       COMPND REMARK SEQADV HETNAM              
REVDAT   5 2                   1       LINK   SITE   ATOM                       
REVDAT   4   13-JUL-11 1INX    1       VERSN                                    
REVDAT   3   24-FEB-09 1INX    1       VERSN                                    
REVDAT   2   01-APR-03 1INX    1       JRNL                                     
REVDAT   1   07-FEB-95 1INX    0                                                
JRNL        AUTH   C.L.WHITE,M.N.JANAKIRAMAN,W.G.LAVER,C.PHILIPPON,A.VASELLA,   
JRNL        AUTH 2 G.M.AIR,M.LUO                                                
JRNL        TITL   A SIALIC ACID-DERIVED PHOSPHONATE ANALOG INHIBITS DIFFERENT  
JRNL        TITL 2 STRAINS OF INFLUENZA VIRUS NEURAMINIDASE WITH DIFFERENT      
JRNL        TITL 3 EFFICIENCIES.                                                
JRNL        REF    J.MOL.BIOL.                   V. 245   623 1995              
JRNL        REFN                   ISSN 0022-2836                               
JRNL        PMID   7844831                                                      
JRNL        DOI    10.1006/JMBI.1994.0051                                       
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   M.N.JANAKIRAMAN,C.L.WHITE,W.G.LAVER,G.M.AIR,M.LUO            
REMARK   1  TITL   STRUCTURE OF INFLUENZA VIRUS NEURAMINIDASE                   
REMARK   1  TITL 2 B(SLASH)LEE(SLASH)40 COMPLEXED WITH SIALIC ACID AND A        
REMARK   1  TITL 3 DEHYDRO ANALOG AT 1.8 ANGSTROMS RESOLUTION: IMPLICATIONS FOR 
REMARK   1  TITL 4 THE CATALYTIC MECHANISM                                      
REMARK   1  REF    BIOCHEMISTRY                  V.  33  8172 1994              
REMARK   1  REFN                   ISSN 0006-2960                               
REMARK   1 REFERENCE 2                                                          
REMARK   1  AUTH   J.N.VARGHESE,P.M.COLMAN                                      
REMARK   1  TITL   THREE-DIMENSIONAL STRUCTURE OF THE INFLUENZA VIRUS           
REMARK   1  TITL 2 A(SLASH)TOKYO(SLASH)3(SLASH)67 AT 2.2 ANGSTROMS RESOLUTION   
REMARK   1  REF    J.MOL.BIOL.                   V. 221   473 1991              
REMARK   1  REFN                   ISSN 0022-2836                               
REMARK   1 REFERENCE 3                                                          
REMARK   1  AUTH   W.R.LIP,J.N.VARGHESE,A.T.BAKER,A.VAN DANELAAR,W.G.LAVER,     
REMARK   1  AUTH 2 R.G.WEBSTER,P.M.COLMAN                                       
REMARK   1  TITL   REFINED ATOMIC STRUCTURES OF N9 SUBTYPE INFLUENZA VIRUS      
REMARK   1  TITL 2 NEURAMINIDASE AND ESCAPE MUTANTS                             
REMARK   1  REF    J.MOL.BIOL.                   V. 221   487 1991              
REMARK   1  REFN                   ISSN 0022-2836                               
REMARK   1 REFERENCE 4                                                          
REMARK   1  AUTH   K.WALLIMAN,A.VASELLA                                         
REMARK   1  TITL   PHOSPHONIC-ACID ANALOGS OF THE N-ACETYL-2-DEOXYNEURAMINIC    
REMARK   1  TITL 2 ACIDS: SYNTHESIS AND INHIBITION OF VIBRIO CHOLEAE SIALIDASE  
REMARK   1  REF    HELV.CHIM.ACTA                V.  73  1359 1990              
REMARK   1  REFN                   ISSN 0018-019X                               
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.40 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : X-PLOR                                               
REMARK   3   AUTHORS     : BRUNGER                                              
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.40                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 8.00                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : NULL                           
REMARK   3   NUMBER OF REFLECTIONS             : 31558                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.179                           
REMARK   3   FREE R VALUE                     : NULL                            
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : NULL                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : NULL                            
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) : NULL                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : NULL                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : NULL                         
REMARK   3   BIN FREE R VALUE                    : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : NULL                         
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : NULL                         
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 3022                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 125                                     
REMARK   3   SOLVENT ATOMS            : 79                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 9.28                           
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : NULL                                                 
REMARK   3    B22 (A**2) : NULL                                                 
REMARK   3    B33 (A**2) : NULL                                                 
REMARK   3    B12 (A**2) : NULL                                                 
REMARK   3    B13 (A**2) : NULL                                                 
REMARK   3    B23 (A**2) : NULL                                                 
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.27                            
REMARK   3   ESD FROM SIGMAA              (A) : NULL                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : NULL                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : NULL                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.013                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.910                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 26.32                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.670                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : NULL                                      
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
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 1INX COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL.                                
REMARK 100 THE DEPOSITION ID IS D_1000174219.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : NULL                               
REMARK 200  TEMPERATURE           (KELVIN) : NULL                               
REMARK 200  PH                             : NULL                               
REMARK 200  NUMBER OF CRYSTALS USED        : NULL                               
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : NULL                               
REMARK 200  RADIATION SOURCE               : NULL                               
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : NULL                               
REMARK 200  WAVELENGTH OR RANGE        (A) : NULL                               
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : NULL                               
REMARK 200  DETECTOR MANUFACTURER          : NULL                               
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : NULL                               
REMARK 200  DATA SCALING SOFTWARE          : NULL                               
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 35409                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : NULL                               
REMARK 200  RESOLUTION RANGE LOW       (A) : NULL                               
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 74.1                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : NULL                               
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) : NULL                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : NULL                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : NULL                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: NULL                                           
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL                         
REMARK 200 SOFTWARE USED: X-PLOR                                                
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 82.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 6.83                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: NATIVE CRYSTALS SOAKED IN 10MM EPANA     
REMARK 280  SOLUTION, PH 7.2.                                                   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 2 2 21                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z+1/2                                             
REMARK 290       3555   -X,Y,-Z+1/2                                             
REMARK 290       4555   X,-Y,-Z                                                 
REMARK 290       5555   X+1/2,Y+1/2,Z                                           
REMARK 290       6555   -X+1/2,-Y+1/2,Z+1/2                                     
REMARK 290       7555   -X+1/2,Y+1/2,-Z+1/2                                     
REMARK 290       8555   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       70.03500            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       70.03500            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   5  1.000000  0.000000  0.000000       60.21000            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       69.91500            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   6 -1.000000  0.000000  0.000000       60.21000            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       69.91500            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       70.03500            
REMARK 290   SMTRY1   7 -1.000000  0.000000  0.000000       60.21000            
REMARK 290   SMTRY2   7  0.000000  1.000000  0.000000       69.91500            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000       70.03500            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000       60.21000            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000       69.91500            
REMARK 290   SMTRY3   8  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, 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 450                                                                      
REMARK 450 SOURCE                                                               
REMARK 450 EPANA                                                                
REMARK 450  SEE WALLIMAN & VASELLA (1990) FOR SYNTHESIS                         
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   HH   TYR A   310     H1   HOH A   571              0.82            
REMARK 500   HG   SER A   101     H1   HOH A   509              0.84            
REMARK 500   HG   SER A   440     H1   HOH A   562              0.98            
REMARK 500   H    ASP A   460     H2   HOH A   554              1.12            
REMARK 500   H    CYS A   129     H1   HOH A   514              1.15            
REMARK 500   HG   SER A   411     H1   HOH A   533              1.18            
REMARK 500   H    PHE A   167     H1   HOH A   552              1.20            
REMARK 500  HH21  ARG A   210     H2   HOH A   527              1.21            
REMARK 500   H    ASN A   336     H2   HOH A   550              1.23            
REMARK 500  HE22  GLN A   226     H    VAL A   240              1.24            
REMARK 500   H2   HOH A   542     H1   HOH A   543              1.26            
REMARK 500   H    ARG A   172     H2   HOH A   503              1.26            
REMARK 500   H    GLY A   260     H1   HOH A   528              1.32            
REMARK 500   H    ASN A   328     H2   HOH A   547              1.32            
REMARK 500  HE21  GLN A   226     H2   HOH A   532              1.33            
REMARK 500   O    LEU A   321     H1   HOH A   546              1.58            
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    LYS A 431   N   -  CA  -  C   ANGL. DEV. = -18.8 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    ASN A 200       49.44   -153.79                                   
REMARK 500    ILE A 222       76.14     57.20                                   
REMARK 500    TYR A 284      127.86    -33.35                                   
REMARK 500    CYS A 291     -161.32   -117.85                                   
REMARK 500    TRP A 295      -74.05   -108.62                                   
REMARK 500    SER A 319      127.05    -37.92                                   
REMARK 500    VAL A 322      125.02     71.90                                   
REMARK 500    ASN A 328      -79.74    -72.45                                   
REMARK 500    ASP A 329      136.99    171.42                                   
REMARK 500    CYS A 337      -11.08     80.24                                   
REMARK 500    GLN A 347     -172.92     73.10                                   
REMARK 500    ASN A 387       19.45     56.42                                   
REMARK 500    SER A 404     -140.18   -127.10                                   
REMARK 500    LYS A 431     -104.18    117.37                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 600                                                                      
REMARK 600 HETEROGEN                                                            
REMARK 600                                                                      
REMARK 600 THE CALCIUM RESIDUE, CA 470, STABILIZES A LOOP NEAR THE              
REMARK 600 NEURAMINIDASE ACTIVE SITE.                                           
REMARK 600                                                                      
REMARK 600 THE EQUATORIAL PHOSPHONATE INHIBITOR IS RESIDUE EQP 500.             
REMARK 600 EQP IS AN EQUATORIAL PHOSPHONATE ANALOG OF O-SIALIC ACID.            
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                              CA A 478  CA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP A 293   O                                                      
REMARK 620 2 GLY A 297   O    83.0                                              
REMARK 620 3 ASP A 324   OD2  78.3  81.5                                        
REMARK 620 4 GLY A 345   O    96.6  81.7 162.9                                  
REMARK 620 5 GLN A 347   O    95.8 169.0 109.1  87.6                            
REMARK 620 N                    1     2     3     4                             
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: CAT                                                 
REMARK 800 EVIDENCE_CODE: AUTHOR                                                
REMARK 800 SITE_DESCRIPTION: SUBSTRATE (SIALIC ACID) BINDING RESIDUES IN        
REMARK 800  CATALYTIC SITE                                                      
DBREF  1INX A   82   469  UNP    P06820   NRAM_IATOK      82    469             
SEQADV 1INX ASP A  339  UNP  P06820    ASN   339 CONFLICT                       
SEQRES   1 A  388  VAL GLU TYR ARG ASN TRP SER LYS PRO GLN CYS GLN ILE          
SEQRES   2 A  388  THR GLY PHE ALA PRO PHE SER LYS ASP ASN SER ILE ARG          
SEQRES   3 A  388  LEU SER ALA GLY GLY ASP ILE TRP VAL THR ARG GLU PRO          
SEQRES   4 A  388  TYR VAL SER CYS ASP PRO VAL LYS CYS TYR GLN PHE ALA          
SEQRES   5 A  388  LEU GLY GLN GLY THR THR LEU ASP ASN LYS HIS SER ASN          
SEQRES   6 A  388  ASP THR VAL HIS ASP ARG ILE PRO HIS ARG THR LEU LEU          
SEQRES   7 A  388  MET ASN GLU LEU GLY VAL PRO PHE HIS LEU GLY THR ARG          
SEQRES   8 A  388  GLN VAL CYS ILE ALA TRP SER SER SER SER CYS HIS ASP          
SEQRES   9 A  388  GLY LYS ALA TRP LEU HIS VAL CYS ILE THR GLY ASP ASP          
SEQRES  10 A  388  LYS ASN ALA THR ALA SER PHE ILE TYR ASP GLY ARG LEU          
SEQRES  11 A  388  VAL ASP SER ILE GLY SER TRP SER GLN ASN ILE LEU ARG          
SEQRES  12 A  388  THR GLN GLU SER GLU CYS VAL CYS ILE ASN GLY THR CYS          
SEQRES  13 A  388  THR VAL VAL MET THR ASP GLY SER ALA SER GLY ARG ALA          
SEQRES  14 A  388  ASP THR ARG ILE LEU PHE ILE GLU GLU GLY LYS ILE VAL          
SEQRES  15 A  388  HIS ILE SER PRO LEU ALA GLY SER ALA GLN HIS VAL GLU          
SEQRES  16 A  388  GLU CYS SER CYS TYR PRO ARG TYR PRO GLY VAL ARG CYS          
SEQRES  17 A  388  ILE CYS ARG ASP ASN TRP LYS GLY SER ASN ARG PRO VAL          
SEQRES  18 A  388  VAL ASP ILE ASN MET GLU ASP TYR SER ILE ASP SER SER          
SEQRES  19 A  388  TYR VAL CYS SER GLY LEU VAL GLY ASP THR PRO ARG ASN          
SEQRES  20 A  388  ASP ASP ARG SER SER ASN SER ASN CYS ARG ASP PRO ASN          
SEQRES  21 A  388  ASN GLU ARG GLY THR GLN GLY VAL LYS GLY TRP ALA PHE          
SEQRES  22 A  388  ASP ASN GLY ASN ASP LEU TRP MET GLY ARG THR ILE SER          
SEQRES  23 A  388  LYS ASP LEU ARG SER GLY TYR GLU THR PHE LYS VAL ILE          
SEQRES  24 A  388  GLY GLY TRP SER THR PRO ASN SER LYS SER GLN ILE ASN          
SEQRES  25 A  388  ARG GLN VAL ILE VAL ASP SER ASP ASN ARG SER GLY TYR          
SEQRES  26 A  388  SER GLY ILE PHE SER VAL GLU GLY LYS SER CYS ILE ASN          
SEQRES  27 A  388  ARG CYS PHE TYR VAL GLU LEU ILE ARG GLY ARG LYS GLN          
SEQRES  28 A  388  GLU THR ARG VAL TRP TRP THR SER ASN SER ILE VAL VAL          
SEQRES  29 A  388  PHE CYS GLY THR SER GLY THR TYR GLY THR GLY SER TRP          
SEQRES  30 A  388  PRO ASP GLY ALA ASN ILE ASN PHE MET PRO ILE                  
MODRES 1INX ASN A   86  ASN  GLYCOSYLATION SITE                                 
MODRES 1INX ASN A  146  ASN  GLYCOSYLATION SITE                                 
MODRES 1INX ASN A  200  ASN  GLYCOSYLATION SITE                                 
MODRES 1INX ASN A  234  ASN  GLYCOSYLATION SITE                                 
HET    NAG  B   1      27                                                       
HET    NAG  B   2      27                                                       
HET    BMA  B   3      20                                                       
HET    MAN  B   4      22                                                       
HET    MAN  B   5      22                                                       
HET    NAG  A 470A     28                                                       
HET    NAG  A 471A     28                                                       
HET    NAG  A 477A     28                                                       
HET     CA  A 478       1                                                       
HET    EQP  A 500      40                                                       
HETNAM     NAG 2-ACETAMIDO-2-DEOXY-BETA-D-GLUCOPYRANOSE                         
HETNAM     BMA BETA-D-MANNOPYRANOSE                                             
HETNAM     MAN ALPHA-D-MANNOPYRANOSE                                            
HETNAM      CA CALCIUM ION                                                      
HETNAM     EQP (1R)-4-ACETAMIDO-1,5-ANHYDRO-2,4-DIDEOXY-1-PHOSPHONO-D-          
HETNAM   2 EQP  GLYCERO-D-GALACTO-OCTITOL                                       
HETSYN     NAG N-ACETYL-BETA-D-GLUCOSAMINE; 2-ACETAMIDO-2-DEOXY-BETA-           
HETSYN   2 NAG  D-GLUCOSE; 2-ACETAMIDO-2-DEOXY-D-GLUCOSE; 2-ACETAMIDO-          
HETSYN   3 NAG  2-DEOXY-GLUCOSE; N-ACETYL-D-GLUCOSAMINE                         
HETSYN     BMA BETA-D-MANNOSE; D-MANNOSE; MANNOSE                               
HETSYN     MAN ALPHA-D-MANNOSE; D-MANNOSE; MANNOSE                              
HETSYN     EQP (4-ACETAMIDO-2,4-DIDEOXY-D-GLYCERO-ALPHA-D-GALACTO-1-            
HETSYN   2 EQP  OCTOPYRANOSYL)PHOSPHONIC ACID                                   
FORMUL   2  NAG    5(C8 H15 N O6)                                               
FORMUL   2  BMA    C6 H12 O6                                                    
FORMUL   2  MAN    2(C6 H12 O6)                                                 
FORMUL   6   CA    CA 2+                                                        
FORMUL   7  EQP    C10 H20 N O9 P                                               
FORMUL   8  HOH   *79(H2 O)                                                     
HELIX    1   1 ASN A  104  ALA A  110  1                                   7    
HELIX    2   2 ASN A  142  ASN A  146  5                                   5    
SHEET    1   A 4 GLY A  96  LYS A 102  0                                        
SHEET    2   A 4 THR A 439  THR A 449 -1  N  VAL A 445   O  SER A 101           
SHEET    3   A 4 ILE A 418  GLY A 429 -1  O  ARG A 420   N  GLY A 448           
SHEET    4   A 4 SER A 407  GLU A 413 -1  O  GLY A 408   N  TYR A 423           
SHEET    1   B 4 TRP A 115  CYS A 124  0                                        
SHEET    2   B 4 CYS A 129  THR A 139 -1  N  TYR A 130   O  SER A 123           
SHEET    3   B 4 THR A 157  GLU A 162 -1  O  THR A 157   N  GLY A 135           
SHEET    4   B 4 ARG A 172  ILE A 176 -1  O  ARG A 172   N  MET A 160           
SHEET    1   C 4 SER A 179  HIS A 184  0                                        
SHEET    2   C 4 TRP A 189  ASP A 197 -1  N  LEU A 190   O  CYS A 183           
SHEET    3   C 4 ASN A 200  TYR A 207 -1  N  ASN A 200   O  ASP A 197           
SHEET    4   C 4 ARG A 210  GLY A 216 -1  O  ARG A 210   N  TYR A 207           
SHEET    1   D 4 LYS A 261  PRO A 267  0                                        
SHEET    2   D 4 ALA A 250  GLU A 258 -1  N  ILE A 254   O  SER A 266           
SHEET    3   D 4 THR A 236  GLY A 244 -1  N  CYS A 237   O  ILE A 257           
SHEET    4   D 4 ARG A 224  THR A 225 -1  N  ARG A 224   O  THR A 242           
SHEET    1   E 4 LYS A 261  PRO A 267  0                                        
SHEET    2   E 4 ALA A 250  GLU A 258 -1  N  ILE A 254   O  SER A 266           
SHEET    3   E 4 THR A 236  GLY A 244 -1  N  CYS A 237   O  ILE A 257           
SHEET    4   E 4 VAL A 231  ILE A 233 -1  O  VAL A 231   N  THR A 238           
SHEET    1   F 4 GLU A 276  ARG A 283  0                                        
SHEET    2   F 4 GLY A 286  ARG A 292 -1  O  GLY A 286   N  ARG A 283           
SHEET    3   F 4 PRO A 301  ASN A 306 -1  O  PRO A 301   N  CYS A 291           
SHEET    4   F 4 ILE A 312  TYR A 316 -1  O  ASP A 313   N  ASP A 304           
SHEET    1   G 4 ALA A 353  ASN A 356  0                                        
SHEET    2   G 4 ASP A 359  ARG A 364 -1  N  ASP A 359   O  ASN A 356           
SHEET    3   G 4 SER A 372  ILE A 380 -1  N  GLU A 375   O  ARG A 364           
SHEET    4   G 4 SER A 390  ARG A 403 -1  O  SER A 390   N  ILE A 380           
SSBOND   1 CYS A   92    CYS A  417                          1555   1555  2.02  
SSBOND   2 CYS A  124    CYS A  129                          1555   1555  2.02  
SSBOND   3 CYS A  175    CYS A  193                          1555   1555  2.02  
SSBOND   4 CYS A  183    CYS A  230                          1555   1555  2.03  
SSBOND   5 CYS A  232    CYS A  237                          1555   1555  2.02  
SSBOND   6 CYS A  278    CYS A  291                          1555   1555  2.02  
SSBOND   7 CYS A  280    CYS A  289                          1555   1555  2.04  
SSBOND   8 CYS A  318    CYS A  337                          1555   1555  2.03  
SSBOND   9 CYS A  421    CYS A  447                          1555   1555  2.02  
LINK         ND2 ASN A  86                 C1  NAG A 470A    1555   1555  1.44  
LINK         ND2 ASN A 146                 C1  NAG A 471A    1555   1555  1.47  
LINK         ND2 ASN A 200                 C1  NAG B   1     1555   1555  1.47  
LINK         ND2 ASN A 234                 C1  NAG A 477A    1555   1555  1.47  
LINK         O4  NAG B   1                 C1  NAG B   2     1555   1555  1.41  
LINK         O4  NAG B   2                 C1  BMA B   3     1555   1555  1.40  
LINK         O3  BMA B   3                 C1  MAN B   4     1555   1555  1.41  
LINK         O6  BMA B   3                 C1  MAN B   5     1555   1555  1.45  
LINK         O   ASP A 293                CA    CA A 478     1555   1555  2.24  
LINK         O   GLY A 297                CA    CA A 478     1555   1555  2.38  
LINK         OD2 ASP A 324                CA    CA A 478     1555   1555  2.98  
LINK         O   GLY A 345                CA    CA A 478     1555   1555  2.40  
LINK         O   GLN A 347                CA    CA A 478     1555   1555  2.14  
CISPEP   1 TYR A  284    PRO A  285          0         0.66                     
CISPEP   2 THR A  325    PRO A  326          0         1.31                     
SITE     1 CAT 11 ARG A 118  GLU A 119  ASP A 151  ARG A 152                    
SITE     2 CAT 11 TRP A 178  ILE A 222  ARG A 224  GLU A 276                    
SITE     3 CAT 11 ARG A 292  ARG A 371  TYR A 406                               
CRYST1  120.420  139.830  140.070  90.00  90.00  90.00 C 2 2 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      0.008304  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.007152  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.007139        0.00000