HEADER    HYDROLASE                               14-AUG-03   1UK2              
TITLE     CRYSTAL STRUCTURE OF SARS CORONAVIRUS MAIN PROTEINASE (3CLPRO) AT     
TITLE    2 PH8.0                                                                
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 3C-LIKE PROTEINASE;                                        
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 SYNONYM: SARS CORONAVIRUS MAIN PROTEINASE, 3CLPRO;                   
COMPND   5 EC: 3.4.24.-;                                                        
COMPND   6 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: SARS CORONAVIRUS;                               
SOURCE   3 ORGANISM_TAXID: 227859;                                              
SOURCE   4 STRAIN: SARS;                                                        
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3);                       
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21(DE3);                                 
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PGEX-6P-1                                 
KEYWDS    ANTI-PARALLEL B-BARREL, ANTI-PARALLEL A-HELICES, HYDROLASE            
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    H.YANG,M.YANG,Y.LIU,M.BARTLAM,Y.DING,Z.LOU,L.SUN,Z.ZHOU,S.YE,K.ANAND, 
AUTHOR   2 H.PANG,G.F.GAO,R.HILGENFELD,Z.RAO                                    
REVDAT   3   27-DEC-23 1UK2    1       REMARK                                   
REVDAT   2   24-FEB-09 1UK2    1       VERSN                                    
REVDAT   1   18-NOV-03 1UK2    0                                                
JRNL        AUTH   H.YANG,M.YANG,Y.DING,Y.LIU,Z.LOU,Z.ZHOU,L.SUN,L.MO,S.YE,     
JRNL        AUTH 2 H.PANG,G.F.GAO,K.ANAND,M.BARTLAM,R.HILGENFELD,Z.RAO          
JRNL        TITL   THE CRYSTAL STRUCTURES OF SEVERE ACUTE RESPIRATORY SYNDROME  
JRNL        TITL 2 VIRUS MAIN PROTEASE AND ITS COMPLEX WITH AN INHIBITOR        
JRNL        REF    PROC.NATL.ACAD.SCI.USA        V. 100 13190 2003              
JRNL        REFN                   ISSN 0027-8424                               
JRNL        PMID   14585926                                                     
JRNL        DOI    10.1073/PNAS.1835675100                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.20 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) : 2.20                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 50.00                          
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)   (%) : NULL                           
REMARK   3   NUMBER OF REFLECTIONS             : 29475                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.226                           
REMARK   3   FREE R VALUE                     : 0.253                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : 1469                            
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            : 4672                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 80                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : NULL                           
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) : NULL                            
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) : 0.021                           
REMARK   3   BOND ANGLES            (DEGREES) : 2.313                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : NULL                            
REMARK   3   IMPROPER ANGLES        (DEGREES) : NULL                            
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  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : NULL                                                 
REMARK   3   KSOL        : NULL                                                 
REMARK   3   BSOL        : 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 1UK2 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 15-AUG-03.                  
REMARK 100 THE DEPOSITION ID IS D_1000005914.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 16-JUL-03                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6.0                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : BSRF                               
REMARK 200  BEAMLINE                       : 3W1A                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.0000                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : MARRESEARCH                        
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 29475                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.200                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 100.0                              
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) : 2.20                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.28                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 100.0                              
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: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: CNS                                                   
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 48.27                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.40                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 6000, MES, DMSO, PH 6.0, VAPOR       
REMARK 280  DIFFUSION, HANGING DROP, TEMPERATURE 291K                           
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y+1/2,-Z                                             
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000       48.71300            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: THE SECOND PART OF THE BIOLOGICAL ASSEMBLY IS GENERATED BY   
REMARK 300 THE TWO FOLD AXIS                                                    
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: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 2490 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 25880 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -13.0 KCAL/MOL                        
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 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     VAL A   303                                                      
REMARK 465     THR A   304                                                      
REMARK 465     PHE A   305                                                      
REMARK 465     GLN A   306                                                      
REMARK 465     VAL B   303                                                      
REMARK 465     THR B   304                                                      
REMARK 465     PHE B   305                                                      
REMARK 465     GLN B   306                                                      
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   OD2  ASP B   229     NZ   LYS B   269              2.11            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500    CYS A  44   CB    CYS A  44   SG     -0.124                       
REMARK 500    CYS B 145   CB    CYS B 145   SG     -0.102                       
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    CYS A  44   CA  -  CB  -  SG  ANGL. DEV. =   7.3 DEGREES          
REMARK 500    LEU A 141   CA  -  CB  -  CG  ANGL. DEV. =  22.2 DEGREES          
REMARK 500    SER A 147   N   -  CA  -  C   ANGL. DEV. = -19.4 DEGREES          
REMARK 500    SER A 301   N   -  CA  -  C   ANGL. DEV. = -16.8 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    PHE A   3     -101.65   -163.43                                   
REMARK 500    ARG A   4      117.63     71.15                                   
REMARK 500    ASP A  33     -126.75     48.11                                   
REMARK 500    MET A  49      -22.03    -38.38                                   
REMARK 500    ASN A  84     -125.69     58.96                                   
REMARK 500    CYS A 117     -165.30   -118.67                                   
REMARK 500    TYR A 118       90.45   -175.49                                   
REMARK 500    LEU A 141     -136.68    -74.75                                   
REMARK 500    TYR A 154     -102.28     79.59                                   
REMARK 500    HIS A 164      -55.06   -129.45                                   
REMARK 500    GLN A 192      108.19     30.43                                   
REMARK 500    ASP A 197      -80.82    -50.71                                   
REMARK 500    THR A 198      148.95     78.90                                   
REMARK 500    ARG A 222       20.28    -75.20                                   
REMARK 500    THR A 224     -175.87    -54.03                                   
REMARK 500    GLN A 299       54.11    -99.74                                   
REMARK 500    CYS A 300       29.38    177.46                                   
REMARK 500    SER A 301       35.08   -156.72                                   
REMARK 500    ASP B  33     -133.46     53.72                                   
REMARK 500    THR B  45      -89.73   -123.94                                   
REMARK 500    ALA B  46      -31.56   -166.06                                   
REMARK 500    ASN B  51       74.12   -162.17                                   
REMARK 500    ASN B  84     -116.88     52.96                                   
REMARK 500    LEU B 141       32.56    -73.71                                   
REMARK 500    TYR B 154     -103.30     69.99                                   
REMARK 500    PRO B 168       -2.06    -52.04                                   
REMARK 500    ASP B 187       20.76    -65.31                                   
REMARK 500    GLN B 189       45.70    -87.12                                   
REMARK 500    ARG B 217       14.81   -148.15                                   
REMARK 500    ASN B 238       31.57     71.33                                   
REMARK 500    THR B 257      -32.47     55.94                                   
REMARK 500    ASN B 277       73.88     40.21                                   
REMARK 500    ARG B 298      -78.79    -72.65                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: PLANAR GROUPS                                              
REMARK 500                                                                      
REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL                 
REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE                    
REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN                    
REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS                        
REMARK 500 AN RMSD GREATER THAN THIS VALUE                                      
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        RMS     TYPE                                    
REMARK 500    TYR A 118         0.06    SIDE CHAIN                              
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1UK3   RELATED DB: PDB                                   
REMARK 900 THE SAME PROTEIN AT PH7.6                                            
REMARK 900 RELATED ID: 1UK4   RELATED DB: PDB                                   
REMARK 900 THE SAME PROTEIN WITH AN INHIBITOR                                   
DBREF  1UK2 A    1   306  UNP    P59641   R1AB_CVHSA    3241   3546             
DBREF  1UK2 B    1   306  UNP    P59641   R1AB_CVHSA    3241   3546             
SEQRES   1 A  306  SER GLY PHE ARG LYS MET ALA PHE PRO SER GLY LYS VAL          
SEQRES   2 A  306  GLU GLY CYS MET VAL GLN VAL THR CYS GLY THR THR THR          
SEQRES   3 A  306  LEU ASN GLY LEU TRP LEU ASP ASP THR VAL TYR CYS PRO          
SEQRES   4 A  306  ARG HIS VAL ILE CYS THR ALA GLU ASP MET LEU ASN PRO          
SEQRES   5 A  306  ASN TYR GLU ASP LEU LEU ILE ARG LYS SER ASN HIS SER          
SEQRES   6 A  306  PHE LEU VAL GLN ALA GLY ASN VAL GLN LEU ARG VAL ILE          
SEQRES   7 A  306  GLY HIS SER MET GLN ASN CYS LEU LEU ARG LEU LYS VAL          
SEQRES   8 A  306  ASP THR SER ASN PRO LYS THR PRO LYS TYR LYS PHE VAL          
SEQRES   9 A  306  ARG ILE GLN PRO GLY GLN THR PHE SER VAL LEU ALA CYS          
SEQRES  10 A  306  TYR ASN GLY SER PRO SER GLY VAL TYR GLN CYS ALA MET          
SEQRES  11 A  306  ARG PRO ASN HIS THR ILE LYS GLY SER PHE LEU ASN GLY          
SEQRES  12 A  306  SER CYS GLY SER VAL GLY PHE ASN ILE ASP TYR ASP CYS          
SEQRES  13 A  306  VAL SER PHE CYS TYR MET HIS HIS MET GLU LEU PRO THR          
SEQRES  14 A  306  GLY VAL HIS ALA GLY THR ASP LEU GLU GLY LYS PHE TYR          
SEQRES  15 A  306  GLY PRO PHE VAL ASP ARG GLN THR ALA GLN ALA ALA GLY          
SEQRES  16 A  306  THR ASP THR THR ILE THR LEU ASN VAL LEU ALA TRP LEU          
SEQRES  17 A  306  TYR ALA ALA VAL ILE ASN GLY ASP ARG TRP PHE LEU ASN          
SEQRES  18 A  306  ARG PHE THR THR THR LEU ASN ASP PHE ASN LEU VAL ALA          
SEQRES  19 A  306  MET LYS TYR ASN TYR GLU PRO LEU THR GLN ASP HIS VAL          
SEQRES  20 A  306  ASP ILE LEU GLY PRO LEU SER ALA GLN THR GLY ILE ALA          
SEQRES  21 A  306  VAL LEU ASP MET CYS ALA ALA LEU LYS GLU LEU LEU GLN          
SEQRES  22 A  306  ASN GLY MET ASN GLY ARG THR ILE LEU GLY SER THR ILE          
SEQRES  23 A  306  LEU GLU ASP GLU PHE THR PRO PHE ASP VAL VAL ARG GLN          
SEQRES  24 A  306  CYS SER GLY VAL THR PHE GLN                                  
SEQRES   1 B  306  SER GLY PHE ARG LYS MET ALA PHE PRO SER GLY LYS VAL          
SEQRES   2 B  306  GLU GLY CYS MET VAL GLN VAL THR CYS GLY THR THR THR          
SEQRES   3 B  306  LEU ASN GLY LEU TRP LEU ASP ASP THR VAL TYR CYS PRO          
SEQRES   4 B  306  ARG HIS VAL ILE CYS THR ALA GLU ASP MET LEU ASN PRO          
SEQRES   5 B  306  ASN TYR GLU ASP LEU LEU ILE ARG LYS SER ASN HIS SER          
SEQRES   6 B  306  PHE LEU VAL GLN ALA GLY ASN VAL GLN LEU ARG VAL ILE          
SEQRES   7 B  306  GLY HIS SER MET GLN ASN CYS LEU LEU ARG LEU LYS VAL          
SEQRES   8 B  306  ASP THR SER ASN PRO LYS THR PRO LYS TYR LYS PHE VAL          
SEQRES   9 B  306  ARG ILE GLN PRO GLY GLN THR PHE SER VAL LEU ALA CYS          
SEQRES  10 B  306  TYR ASN GLY SER PRO SER GLY VAL TYR GLN CYS ALA MET          
SEQRES  11 B  306  ARG PRO ASN HIS THR ILE LYS GLY SER PHE LEU ASN GLY          
SEQRES  12 B  306  SER CYS GLY SER VAL GLY PHE ASN ILE ASP TYR ASP CYS          
SEQRES  13 B  306  VAL SER PHE CYS TYR MET HIS HIS MET GLU LEU PRO THR          
SEQRES  14 B  306  GLY VAL HIS ALA GLY THR ASP LEU GLU GLY LYS PHE TYR          
SEQRES  15 B  306  GLY PRO PHE VAL ASP ARG GLN THR ALA GLN ALA ALA GLY          
SEQRES  16 B  306  THR ASP THR THR ILE THR LEU ASN VAL LEU ALA TRP LEU          
SEQRES  17 B  306  TYR ALA ALA VAL ILE ASN GLY ASP ARG TRP PHE LEU ASN          
SEQRES  18 B  306  ARG PHE THR THR THR LEU ASN ASP PHE ASN LEU VAL ALA          
SEQRES  19 B  306  MET LYS TYR ASN TYR GLU PRO LEU THR GLN ASP HIS VAL          
SEQRES  20 B  306  ASP ILE LEU GLY PRO LEU SER ALA GLN THR GLY ILE ALA          
SEQRES  21 B  306  VAL LEU ASP MET CYS ALA ALA LEU LYS GLU LEU LEU GLN          
SEQRES  22 B  306  ASN GLY MET ASN GLY ARG THR ILE LEU GLY SER THR ILE          
SEQRES  23 B  306  LEU GLU ASP GLU PHE THR PRO PHE ASP VAL VAL ARG GLN          
SEQRES  24 B  306  CYS SER GLY VAL THR PHE GLN                                  
FORMUL   3  HOH   *80(H2 O)                                                     
HELIX    1   1 SER A   10  GLY A   15  1                                   6    
HELIX    2   2 HIS A   41  CYS A   44  5                                   4    
HELIX    3   3 GLU A   47  ASN A   51  5                                   5    
HELIX    4   4 ASN A   53  ARG A   60  1                                   8    
HELIX    5   5 SER A   62  HIS A   64  5                                   3    
HELIX    6   6 ILE A  200  ASN A  214  1                                  15    
HELIX    7   7 THR A  226  TYR A  237  1                                  12    
HELIX    8   8 THR A  243  LEU A  250  1                                   8    
HELIX    9   9 LEU A  250  GLY A  258  1                                   9    
HELIX   10  10 ALA A  260  GLY A  275  1                                  16    
HELIX   11  11 THR A  292  GLN A  299  1                                   8    
HELIX   12  12 SER B   10  GLY B   15  1                                   6    
HELIX   13  13 HIS B   41  CYS B   44  5                                   4    
HELIX   14  14 GLU B   47  ASN B   51  5                                   5    
HELIX   15  15 ASN B   53  ARG B   60  1                                   8    
HELIX   16  16 SER B   62  HIS B   64  5                                   3    
HELIX   17  17 ILE B  200  ASN B  214  1                                  15    
HELIX   18  18 THR B  226  TYR B  237  1                                  12    
HELIX   19  19 THR B  243  LEU B  250  1                                   8    
HELIX   20  20 LEU B  250  GLN B  256  1                                   7    
HELIX   21  21 ALA B  260  GLY B  275  1                                  16    
HELIX   22  22 THR B  292  CYS B  300  1                                   9    
SHEET    1   A 7 VAL A  73  LEU A  75  0                                        
SHEET    2   A 7 PHE A  66  ALA A  70 -1  N  ALA A  70   O  VAL A  73           
SHEET    3   A 7 MET A  17  CYS A  22 -1  N  THR A  21   O  LEU A  67           
SHEET    4   A 7 THR A  25  LEU A  32 -1  O  LEU A  27   N  VAL A  20           
SHEET    5   A 7 THR A  35  PRO A  39 -1  O  TYR A  37   N  LEU A  30           
SHEET    6   A 7 LEU A  86  VAL A  91 -1  O  LEU A  87   N  CYS A  38           
SHEET    7   A 7 VAL A  77  GLN A  83 -1  N  SER A  81   O  ARG A  88           
SHEET    1   B 5 LYS A 100  PHE A 103  0                                        
SHEET    2   B 5 CYS A 156  GLU A 166  1  O  VAL A 157   N  LYS A 100           
SHEET    3   B 5 VAL A 148  ASP A 153 -1  N  ASN A 151   O  SER A 158           
SHEET    4   B 5 THR A 111  ALA A 116 -1  N  SER A 113   O  PHE A 150           
SHEET    5   B 5 GLY A 124  ALA A 129 -1  O  TYR A 126   N  VAL A 114           
SHEET    1   C 3 LYS A 100  PHE A 103  0                                        
SHEET    2   C 3 CYS A 156  GLU A 166  1  O  VAL A 157   N  LYS A 100           
SHEET    3   C 3 HIS A 172  THR A 175 -1  O  ALA A 173   N  MET A 165           
SHEET    1   D 7 VAL B  73  LEU B  75  0                                        
SHEET    2   D 7 PHE B  66  ALA B  70 -1  N  VAL B  68   O  LEU B  75           
SHEET    3   D 7 MET B  17  CYS B  22 -1  N  THR B  21   O  LEU B  67           
SHEET    4   D 7 THR B  25  LEU B  32 -1  O  LEU B  27   N  VAL B  20           
SHEET    5   D 7 THR B  35  PRO B  39 -1  O  TYR B  37   N  LEU B  30           
SHEET    6   D 7 LEU B  86  VAL B  91 -1  O  LEU B  89   N  VAL B  36           
SHEET    7   D 7 VAL B  77  GLN B  83 -1  N  SER B  81   O  ARG B  88           
SHEET    1   E 5 LYS B 100  PHE B 103  0                                        
SHEET    2   E 5 CYS B 156  GLU B 166  1  O  VAL B 157   N  LYS B 100           
SHEET    3   E 5 SER B 144  ASP B 153 -1  N  ASN B 151   O  SER B 158           
SHEET    4   E 5 THR B 111  TYR B 118 -1  N  SER B 113   O  PHE B 150           
SHEET    5   E 5 SER B 121  ALA B 129 -1  O  TYR B 126   N  VAL B 114           
SHEET    1   F 3 LYS B 100  PHE B 103  0                                        
SHEET    2   F 3 CYS B 156  GLU B 166  1  O  VAL B 157   N  LYS B 100           
SHEET    3   F 3 HIS B 172  THR B 175 -1  O  ALA B 173   N  MET B 165           
CRYST1   49.485   97.426   67.535  90.00 101.70  90.00 P 1 21 1      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      0.020208  0.000000  0.004185        0.00000                         
SCALE2      0.000000  0.010264  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.015121        0.00000