HEADER    GLYCOSIDASE                             25-JUN-96   1OBS              
TITLE     STRUCTURE OF RICIN A CHAIN MUTANT                                     
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: RICIN A CHAIN;                                             
COMPND   3 CHAIN: A;                                                            
COMPND   4 EC: 3.2.2.22;                                                        
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: RICINUS COMMUNIS;                               
SOURCE   3 ORGANISM_COMMON: CASTOR BEAN;                                        
SOURCE   4 ORGANISM_TAXID: 3988;                                                
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: JM101;                                     
SOURCE   8 EXPRESSION_SYSTEM_PLASMID: PUTA                                      
KEYWDS    HYDROLASE, GLYCOSIDASE, TOXIN, DUPLICATION, GLYCOPROTEIN, LECTIN      
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    P.J.DAY,S.R.ERNST,A.E.FRANKEL,A.F.MONZINGO,J.M.PASCAL,M.SVINTH,       
AUTHOR   2 J.D.ROBERTUS                                                         
REVDAT   4   14-FEB-24 1OBS    1       REMARK                                   
REVDAT   3   03-NOV-21 1OBS    1       SEQADV                                   
REVDAT   2   24-FEB-09 1OBS    1       VERSN                                    
REVDAT   1   16-JUN-97 1OBS    0                                                
JRNL        AUTH   P.J.DAY,S.R.ERNST,A.E.FRANKEL,A.F.MONZINGO,J.M.PASCAL,       
JRNL        AUTH 2 M.C.MOLINA-SVINTH,J.D.ROBERTUS                               
JRNL        TITL   STRUCTURE AND ACTIVITY OF AN ACTIVE SITE SUBSTITUTION OF     
JRNL        TITL 2 RICIN A CHAIN.                                               
JRNL        REF    BIOCHEMISTRY                  V.  35 11098 1996              
JRNL        REFN                   ISSN 0006-2960                               
JRNL        PMID   8780513                                                      
JRNL        DOI    10.1021/BI960880N                                            
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   S.A.WESTON,A.D.TUCKER,D.R.THATCHER,D.J.DERBYSHIRE,           
REMARK   1  AUTH 2 R.A.PAUPTIT                                                  
REMARK   1  TITL   X-RAY STRUCTURE OF RECOMBINANT RICIN A-CHAIN AT 1.8 A        
REMARK   1  TITL 2 RESOLUTION                                                   
REMARK   1  REF    J.MOL.BIOL.                   V. 244   410 1994              
REMARK   1  REFN                   ISSN 0022-2836                               
REMARK   1 REFERENCE 2                                                          
REMARK   1  AUTH   D.MLSNA,A.F.MONZINGO,B.J.KATZIN,S.ERNST,J.D.ROBERTUS         
REMARK   1  TITL   STRUCTURE OF RECOMBINANT RICIN A CHAIN AT 2.3 A              
REMARK   1  REF    PROTEIN SCI.                  V.   2   429 1993              
REMARK   1  REFN                   ISSN 0961-8368                               
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.20 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : X-PLOR 3.1                                           
REMARK   3   AUTHORS     : BRUNGER                                              
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.20                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 10.00                          
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)   (%) : 99.8                           
REMARK   3   NUMBER OF REFLECTIONS             : 17633                          
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) : 0.214                           
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            : 2029                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 87                                      
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) : 0.013                           
REMARK   3   BOND ANGLES            (DEGREES) : 2.750                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 24.82                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.280                           
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: SET OF IDEAL BOND LENGTHS AND ANGLES      
REMARK   3  USED DURING REFINEMENT: RAMACHANDRAN ET AL. (1974), BIOCHIM.        
REMARK   3  BIOPHYS. ACTA 359, 298. FINAL RMS COORD. SHIFT 0.49 ANGSTROMS       
REMARK   4                                                                      
REMARK   4 1OBS 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_1000175423.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 06-MAR-95                          
REMARK 200  TEMPERATURE           (KELVIN) : NULL                               
REMARK 200  PH                             : NULL                               
REMARK 200  NUMBER OF CRYSTALS USED        : NULL                               
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : NULL                               
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : AREA DETECTOR                      
REMARK 200  DETECTOR MANUFACTURER          : XUONG-HAMLIN MULTIWIRE             
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : SDMS                               
REMARK 200  DATA SCALING SOFTWARE          : NULL                               
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 18873                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.100                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 90.9                               
REMARK 200  DATA REDUNDANCY                : 20.00                              
REMARK 200  R MERGE                    (I) : 0.07600                            
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 3.1                                            
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 55.93                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.79                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: NULL                                     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 41 21 2                        
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   -Y+1/2,X+1/2,Z+1/4                                      
REMARK 290       4555   Y+1/2,-X+1/2,Z+3/4                                      
REMARK 290       5555   -X+1/2,Y+1/2,-Z+1/4                                     
REMARK 290       6555   X+1/2,-Y+1/2,-Z+3/4                                     
REMARK 290       7555   Y,X,-Z                                                  
REMARK 290       8555   -Y,-X,-Z+1/2                                            
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       70.60000            
REMARK 290   SMTRY1   3  0.000000 -1.000000  0.000000       34.40000            
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000       34.40000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000       35.30000            
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000       34.40000            
REMARK 290   SMTRY2   4 -1.000000  0.000000  0.000000       34.40000            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000      105.90000            
REMARK 290   SMTRY1   5 -1.000000  0.000000  0.000000       34.40000            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       34.40000            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000       35.30000            
REMARK 290   SMTRY1   6  1.000000  0.000000  0.000000       34.40000            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       34.40000            
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000      105.90000            
REMARK 290   SMTRY1   7  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   7  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000       70.60000            
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: DIMERIC                           
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   2  0.000000  1.000000  0.000000       68.80000            
REMARK 350   BIOMT2   2  1.000000  0.000000  0.000000      -68.80000            
REMARK 350   BIOMT3   2  0.000000  0.000000 -1.000000      141.20000            
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     ILE A     1                                                      
REMARK 465     PHE A     2                                                      
REMARK 465     PRO A     3                                                      
REMARK 465     LYS A     4                                                      
REMARK 465     GLN A     5                                                      
REMARK 465     PRO A   263                                                      
REMARK 465     SER A   264                                                      
REMARK 465     SER A   265                                                      
REMARK 465     GLN A   266                                                      
REMARK 465     PHE A   267                                                      
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    HIS A  65   NE2   HIS A  65   CD2    -0.066                       
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  31   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.0 DEGREES          
REMARK 500    ARG A  85   NE  -  CZ  -  NH1 ANGL. DEV. =   3.3 DEGREES          
REMARK 500    ARG A 125   NE  -  CZ  -  NH1 ANGL. DEV. =   3.7 DEGREES          
REMARK 500    ARG A 189   NE  -  CZ  -  NH1 ANGL. DEV. =   3.1 DEGREES          
REMARK 500    ARG A 189   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.3 DEGREES          
REMARK 500    ARG A 191   NE  -  CZ  -  NH1 ANGL. DEV. =   3.4 DEGREES          
REMARK 500    ARG A 197   NE  -  CZ  -  NH1 ANGL. DEV. =   3.3 DEGREES          
REMARK 500    TRP A 211   CD1 -  CG  -  CD2 ANGL. DEV. =   5.8 DEGREES          
REMARK 500    TRP A 211   CE2 -  CD2 -  CG  ANGL. DEV. =  -6.1 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  78       -7.39   -143.51                                   
REMARK 500    ILE A 175      -66.54   -108.95                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
DBREF  1OBS A    1   267  UNP    P02879   RICI_RICCO      36    302             
SEQADV 1OBS HIS A  180  UNP  P02879    ARG   215 ENGINEERED MUTATION            
SEQRES   1 A  267  ILE PHE PRO LYS GLN TYR PRO ILE ILE ASN PHE THR THR          
SEQRES   2 A  267  ALA GLY ALA THR VAL GLN SER TYR THR ASN PHE ILE ARG          
SEQRES   3 A  267  ALA VAL ARG GLY ARG LEU THR THR GLY ALA ASP VAL ARG          
SEQRES   4 A  267  HIS GLU ILE PRO VAL LEU PRO ASN ARG VAL GLY LEU PRO          
SEQRES   5 A  267  ILE ASN GLN ARG PHE ILE LEU VAL GLU LEU SER ASN HIS          
SEQRES   6 A  267  ALA GLU LEU SER VAL THR LEU ALA LEU ASP VAL THR ASN          
SEQRES   7 A  267  ALA TYR VAL VAL GLY TYR ARG ALA GLY ASN SER ALA TYR          
SEQRES   8 A  267  PHE PHE HIS PRO ASP ASN GLN GLU ASP ALA GLU ALA ILE          
SEQRES   9 A  267  THR HIS LEU PHE THR ASP VAL GLN ASN ARG TYR THR PHE          
SEQRES  10 A  267  ALA PHE GLY GLY ASN TYR ASP ARG LEU GLU GLN LEU ALA          
SEQRES  11 A  267  GLY ASN LEU ARG GLU ASN ILE GLU LEU GLY ASN GLY PRO          
SEQRES  12 A  267  LEU GLU GLU ALA ILE SER ALA LEU TYR TYR TYR SER THR          
SEQRES  13 A  267  GLY GLY THR GLN LEU PRO THR LEU ALA ARG SER PHE ILE          
SEQRES  14 A  267  ILE CYS ILE GLN MET ILE SER GLU ALA ALA HIS PHE GLN          
SEQRES  15 A  267  TYR ILE GLU GLY GLU MET ARG THR ARG ILE ARG TYR ASN          
SEQRES  16 A  267  ARG ARG SER ALA PRO ASP PRO SER VAL ILE THR LEU GLU          
SEQRES  17 A  267  ASN SER TRP GLY ARG LEU SER THR ALA ILE GLN GLU SER          
SEQRES  18 A  267  ASN GLN GLY ALA PHE ALA SER PRO ILE GLN LEU GLN ARG          
SEQRES  19 A  267  ARG ASN GLY SER LYS PHE SER VAL TYR ASP VAL SER ILE          
SEQRES  20 A  267  LEU ILE PRO ILE ILE ALA LEU MET VAL TYR ARG CYS ALA          
SEQRES  21 A  267  PRO PRO PRO SER SER GLN PHE                                  
FORMUL   2  HOH   *87(H2 O)                                                     
HELIX    1   A VAL A   18  LEU A   32  1                                  15    
HELIX    2   B GLU A   99  ILE A  104  1                                   6    
HELIX    3   C ASN A  122  GLU A  127  1                                   6    
HELIX    4   D ASN A  141  TYR A  152  1                                  12    
HELIX    5   E LEU A  161  HIS A  180  1                                  20    
HELIX    6   F ILE A  184  ILE A  192  1                                   9    
HELIX    7   G PRO A  202  SER A  210  1                                   9    
HELIX    8   H TRP A  211  GLN A  219  1                                   9    
SHEET    1   1 6 PRO A   7  THR A  13  0                                        
SHEET    2   1 6 ARG A  56  ASN A  64  1  N  LEU A  59   O  PRO A   7           
SHEET    3   1 6 LEU A  68  VAL A  76 -1  O  LEU A  68   N  ASN A  64           
SHEET    4   1 6 ALA A  79  ALA A  86 -1  O  GLY A  83   N  ALA A  73           
SHEET    5   1 6 ASN A  88  PHE A  93 -1  N  SER A  89   O  ALA A  86           
SHEET    6   1 6 ASN A 113  PHE A 117  1  N  TYR A 115   O  ALA A  90           
SHEET    1   2 2 ILE A 230  ARG A 234  0                                        
SHEET    2   2 2 GLY A 237  VAL A 242 -1  O  VAL A 242   N  ILE A 230           
CRYST1   68.800   68.800  141.200  90.00  90.00  90.00 P 41 21 2     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      0.014535  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.014535  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.007082        0.00000