HEADER    HYDROLASE INHIBITOR                     21-MAY-02   1LU0              
TITLE     ATOMIC RESOLUTION STRUCTURE OF SQUASH TRYPSIN INHIBITOR: UNEXPECTED   
TITLE    2 METAL COORDINATION                                                   
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: TRYPSIN INHIBITOR I;                                       
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 SYNONYM: CMTI-I;                                                     
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: CUCURBITA MAXIMA;                               
SOURCE   3 ORGANISM_COMMON: WINTER SQUASH;                                      
SOURCE   4 ORGANISM_TAXID: 3661;                                                
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21(DE3)-PLYS(S);                         
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PAED4                                     
KEYWDS    SERINE PROTEASE INHIBITOR, METAL COORDINATION, HYDROLASE INHIBITOR    
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    R.THAIMATTAM,E.TYKARSKA,A.BIERZYNSKI,G.M.SHELDRICK,M.JASKOLSKI        
REVDAT   6   30-OCT-24 1LU0    1       REMARK                                   
REVDAT   5   27-OCT-21 1LU0    1       REMARK SEQADV LINK                       
REVDAT   4   20-JAN-16 1LU0    1       LINK                                     
REVDAT   3   13-JUL-11 1LU0    1       VERSN                                    
REVDAT   2   24-FEB-09 1LU0    1       VERSN                                    
REVDAT   1   28-AUG-02 1LU0    0                                                
JRNL        AUTH   R.THAIMATTAM,E.TYKARSKA,A.BIERZYNSKI,G.M.SHELDRICK,          
JRNL        AUTH 2 M.JASKOLSKI                                                  
JRNL        TITL   ATOMIC RESOLUTION STRUCTURE OF SQUASH TRYPSIN INHIBITOR:     
JRNL        TITL 2 UNEXPECTED METAL COORDINATION.                               
JRNL        REF    ACTA CRYSTALLOGR.,SECT.D      V.  58  1448 2002              
JRNL        REFN                   ISSN 0907-4449                               
JRNL        PMID   12198301                                                     
JRNL        DOI    10.1107/S0907444902011769                                    
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   W.BODE,H.J.GREYLING,R.HUBER,J.OTLEWSKI,T.WILUSZ              
REMARK   1  TITL   THE REFINED 2.0 A X-RAY CRYSTAL STRUCTURE OF THE COMPLEX     
REMARK   1  TITL 2 FORMED BETWEEN BOVINE BETA-TRYPSIN AND CMTI-I, A TRYPSIN     
REMARK   1  TITL 3 INHIBITOR FROM SQUASH SEEDS (CUCURBITA MAXIMA). TOPOLOGICAL  
REMARK   1  TITL 4 SIMILARITY OF THE SQUASH SEED INHIBITORS WITH THE            
REMARK   1  TITL 5 CARBOXYPEPTIDASE A INHIBITOR FROM POTATOES                   
REMARK   1  REF    FEBS LETT.                    V. 242   285 1989              
REMARK   1  REFN                   ISSN 0014-5793                               
REMARK   1  DOI    10.1016/0014-5793(89)80486-7                                 
REMARK   1 REFERENCE 2                                                          
REMARK   1  AUTH   R.HELLAND,G.I.BERGLUND,J.OTLEWSKI,W.APOSTOLUK,O.A.ANDERSEN,  
REMARK   1  AUTH 2 N.P.WILLASSEN,A.O.SMALAS                                     
REMARK   1  TITL   HIGH-RESOLUTION STRUCTURES OF THREE NEW                      
REMARK   1  TITL 2 TRYPSIN-SQUASH-INHIBITOR COMPLEXES: A DETAILED COMPARISON    
REMARK   1  TITL 3 WITH OTHER TRYPSINS AND THEIR COMPLEXES                      
REMARK   1  REF    ACTA CRYSTALLOGR.,SECT.D      V.  55   139 1999              
REMARK   1  REFN                   ISSN 0907-4449                               
REMARK   1  DOI    10.1107/S0108768198010805                                    
REMARK   1 REFERENCE 3                                                          
REMARK   1  AUTH   I.ZHUKOV,L.JAROSZEWSKI,A.BIERZYNSKI                          
REMARK   1  TITL   CONSERVATIVE MUTATION MET8 --> LEU EFFECTS FOLDING AND       
REMARK   1  TITL 2 STABILITY OF SQUASH TRYPSIN INHIBITOR CMTI-I                 
REMARK   1  REF    PROTEIN SCI.                  V.   9   273 2000              
REMARK   1  REFN                   ISSN 0961-8368                               
REMARK   1 REFERENCE 4                                                          
REMARK   1  AUTH   M.NILGES,J.HABAZETTL,A.T.BRUNGER,T.A.HOLAK                   
REMARK   1  TITL   RELAXATION MATRIX REFINEMENT OF THE SOLUTION STRUCTURE OF    
REMARK   1  TITL 2 SQUASH TRYPSIN INHIBITOR                                     
REMARK   1  REF    J.MOL.BIOL.                   V. 219   499 1991              
REMARK   1  REFN                   ISSN 0022-2836                               
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.03 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : SHELXL-97                                            
REMARK   3   AUTHORS     : G.M.SHELDRICK                                        
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.03                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 10.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.1                           
REMARK   3   CROSS-VALIDATION METHOD           : FREE R                         
REMARK   3   FREE R VALUE TEST SET SELECTION   : RANDOM                         
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (NO CUTOFF).                         
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : 0.121                  
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : 0.120                  
REMARK   3   FREE R VALUE                  (NO CUTOFF) : 0.145                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : 5.000                  
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : 1345                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : 26990                  
REMARK   3                                                                      
REMARK   3  FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F).                     
REMARK   3   R VALUE   (WORKING + TEST SET, F>4SIG(F)) : 0.115                  
REMARK   3   R VALUE          (WORKING SET, F>4SIG(F)) : 0.114                  
REMARK   3   FREE R VALUE                  (F>4SIG(F)) : 0.140                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : 5.000                  
REMARK   3   FREE R VALUE TEST SET COUNT   (F>4SIG(F)) : 1139                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (F>4SIG(F)) : 22676                  
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS      : 444                                           
REMARK   3   NUCLEIC ACID ATOMS : 0                                             
REMARK   3   HETEROGEN ATOMS    : 24                                            
REMARK   3   SOLVENT ATOMS      : 76                                            
REMARK   3                                                                      
REMARK   3  MODEL REFINEMENT.                                                   
REMARK   3   OCCUPANCY SUM OF NON-HYDROGEN ATOMS      : 517.49                  
REMARK   3   OCCUPANCY SUM OF HYDROGEN ATOMS          : 432.00                  
REMARK   3   NUMBER OF DISCRETELY DISORDERED RESIDUES : 5                       
REMARK   3   NUMBER OF LEAST-SQUARES PARAMETERS       : 5179                    
REMARK   3   NUMBER OF RESTRAINTS                     : 6000                    
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM RESTRAINT TARGET VALUES.                        
REMARK   3   BOND LENGTHS                         (A) : 0.025                   
REMARK   3   ANGLE DISTANCES                      (A) : 0.039                   
REMARK   3   SIMILAR DISTANCES (NO TARGET VALUES) (A) : 0.000                   
REMARK   3   DISTANCES FROM RESTRAINT PLANES      (A) : 0.031                   
REMARK   3   ZERO CHIRAL VOLUMES               (A**3) : 0.106                   
REMARK   3   NON-ZERO CHIRAL VOLUMES           (A**3) : 0.130                   
REMARK   3   ANTI-BUMPING DISTANCE RESTRAINTS     (A) : 0.000                   
REMARK   3   RIGID-BOND ADP COMPONENTS         (A**2) : 0.006                   
REMARK   3   SIMILAR ADP COMPONENTS            (A**2) : 0.056                   
REMARK   3   APPROXIMATELY ISOTROPIC ADPS      (A**2) : 0.091                   
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED: MOEWS & KRETSINGER, J.MOL.BIOL.91(1973)201-228        
REMARK   3                                                                      
REMARK   3  STEREOCHEMISTRY TARGET VALUES : ENGH AND HUBER                      
REMARK   3   SPECIAL CASE: CSD                                                  
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS:                                           
REMARK   3  ANISOTROPIC REFINEMENT WITHOUT STEREOCHEMICAL RESTRAINTS ON MAIN    
REMARK   3  CHAIN ATOMS WITH LOW BEQ (<15 A**2). IN BOTH MOLECULES (A AND B)    
REMARK   3  THERE IS A SALT BRIDGE BETWEEN THE C-TERMINUS AND THE ARG1 SIDE     
REMARK   3  CHAIN. THE ARG5 SIDE CHAIN IN MOLECULE A IS MODELED IN TWO          
REMARK   3  CONFORMATIONS. THE VAL21 AND TYR27 SIDE CHAINS IN BOTH MOLECULES    
REMARK   3  ARE MODELED IN DOUBLE CONFORMATION. HIS25 HAS DIFFERENT             
REMARK   3  PROTONATION AND CONFORMATION IN THE TWO MOLECULES. THE ZINC AND     
REMARK   3  SULFATE IONS LIE ON A COMMON TWO FOLD AXIS. ONE MPD AND TWO         
REMARK   3  GLYCEROL MOLECULES ARE MODELED IN THE SOLVENT REGION. BLOCKED FULL- 
REMARK   3  MATIX LEAST-SQUARES CALCULATIONS WERE PERFORMED AT THE CONCLUSION   
REMARK   3  OF THE REFINEMENT.                                                  
REMARK   3  IN REMARK 500, THE ATOMS IN ALL CASES REPRESENT COMPLEMENTARY       
REMARK   3  PAIRS WITH PARTIAL OCCUPANCIES.                                     
REMARK   4                                                                      
REMARK   4 1LU0 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 07-JUN-02.                  
REMARK 100 THE DEPOSITION ID IS D_1000016268.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 07-APR-00                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : EMBL/DESY, HAMBURG                 
REMARK 200  BEAMLINE                       : BW7A                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.8919                             
REMARK 200  MONOCHROMATOR                  : SI, DOUBLE CRYSTAL, TUNABLE        
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
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   : 27045                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.030                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 15.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.2                               
REMARK 200  DATA REDUNDANCY                : 9.300                              
REMARK 200  R MERGE                    (I) : 0.04700                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 30.7000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.03                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.07                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 98.3                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.50                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.15100                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.730                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: DUAL-SPACE RECYCLING         
REMARK 200 SOFTWARE USED: SHELXD                                                
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 44.80                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.23                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 8000, ZINC SULFATE, CACODYLATE,      
REMARK 280  MPD, PH 6.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 293.0K      
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2                        
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z                                                 
REMARK 290       3555   -X+1/2,Y+1/2,-Z                                         
REMARK 290       4555   X+1/2,-Y+1/2,-Z                                         
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000       23.64000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       29.31500            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       23.64000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       29.31500            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: FOUR MOLECULES OF THE INHIBITOR COORDINATE A SINGLE ZINC     
REMARK 300 CATION IN A TETRAHEDRAL FASHION VIA THEIR GLU19 SIDE CHAINS. TWO OF  
REMARK 300 THEM (MOLECULES A AND B) CONSTITUTE THE CONTENTS OF THE ASYMMETRIC   
REMARK 300 UNIT. THE FULL COORDINATION SPHERE IS GENERATED BY THE OPERATION: -  
REMARK 300 X, -Y, Z, OF A TWO-FOLD AXIS. THE ZINC CATION HAS A SPECIAL          
REMARK 300 POSITION (OCCUPANCY 0.5) ON THIS 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: TETRAMERIC                        
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC                 
REMARK 350 SOFTWARE USED: PISA,PQS                                              
REMARK 350 TOTAL BURIED SURFACE AREA: 3410 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 8570 ANGSTROM**2                        
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -97.0 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 350   BIOMT1   2 -1.000000  0.000000  0.000000       94.56000            
REMARK 350   BIOMT2   2  0.000000 -1.000000  0.000000      117.26000            
REMARK 350   BIOMT3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 375                                                                      
REMARK 375 SPECIAL POSITION                                                     
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS            
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL          
REMARK 375 POSITIONS.                                                           
REMARK 375                                                                      
REMARK 375 ATOM RES CSSEQI                                                      
REMARK 375 ZN    ZN A 201  LIES ON A SPECIAL POSITION.                          
REMARK 375 S    SO4 B 205  LIES ON A SPECIAL POSITION.                          
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   5   NH1 -  CZ  -  NH2 ANGL. DEV. =  -8.2 DEGREES          
REMARK 500    ARG A   5   NE  -  CZ  -  NH1 ANGL. DEV. =  -4.6 DEGREES          
REMARK 500    ARG A   5   NE  -  CZ  -  NH2 ANGL. DEV. =   6.4 DEGREES          
REMARK 500    LYS A  11   CB  -  CG  -  CD  ANGL. DEV. =  16.0 DEGREES          
REMARK 500    TYR B  27   CG  -  CD1 -  CE1 ANGL. DEV. =   5.6 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    ALA A  18     -128.59     55.06                                   
REMARK 500    ALA B  18     -131.06     52.97                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 610                                                                      
REMARK 610 MISSING HETEROATOM                                                   
REMARK 610 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 610 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 610 I=INSERTION CODE):                                                   
REMARK 610   M RES C SSEQI                                                      
REMARK 610     SO4 B  205                                                       
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                              ZN A 201  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLU A  19   OE1                                                    
REMARK 620 2 GLU A  19   OE1  93.8                                              
REMARK 620 3 GLU B  19   OE2 116.7 121.1                                        
REMARK 620 4 GLU B  19   OE1  88.1  81.4  53.2                                  
REMARK 620 5 GLU B  19   OE1  81.4  88.1 142.0 164.7                            
REMARK 620 6 GLU B  19   OE2 121.1 116.7  90.0 142.0  53.2                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 201                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 B 205                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MRD B 204                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GOL A 202                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GOL B 203                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1PPE   RELATED DB: PDB                                   
REMARK 900 1PPE IS WILD TYPE SEQUENCE OF THE SAME PROTEIN COMPLEXED WITH        
REMARK 900 BOVINE TRYPSIN                                                       
REMARK 900 RELATED ID: 2STA   RELATED DB: PDB                                   
REMARK 900 2STA IS WILD TYPE SEQUENCE OF THE SAME PROTEIN COMPLEXED WITH        
REMARK 900 SALMON TRYPSIN                                                       
REMARK 900 RELATED ID: 2STB   RELATED DB: PDB                                   
REMARK 900 2STB IS A RELATED INHIBITOR COMPLEXED WITH SALMON TRYPSIN            
REMARK 900 RELATED ID: 2BTC   RELATED DB: PDB                                   
REMARK 900 2BTC IS A RELATED INHIBITOR COMPLEXED WITH BOVINE TRYPSIN            
REMARK 900 RELATED ID: 1BXJ   RELATED DB: PDB                                   
REMARK 900 1BXJ IS NMR STRUCTURE OF THE SAME PROTEIN                            
REMARK 900 RELATED ID: 3CTI   RELATED DB: PDB                                   
REMARK 900 3CTI IS NMR STRUCTURE OF WILD TYPE SEQUENCE OF THE SAME PROTEIN      
DBREF  1LU0 A    1    29  UNP    P01074   ITR1_CUCMA       1     29             
DBREF  1LU0 B    1    29  UNP    P01074   ITR1_CUCMA       1     29             
SEQADV 1LU0 LEU A    8  UNP  P01074    MET     8 ENGINEERED MUTATION            
SEQADV 1LU0 LEU B    8  UNP  P01074    MET     8 ENGINEERED MUTATION            
SEQRES   1 A   29  ARG VAL CYS PRO ARG ILE LEU LEU GLU CYS LYS LYS ASP          
SEQRES   2 A   29  SER ASP CYS LEU ALA GLU CYS VAL CYS LEU GLU HIS GLY          
SEQRES   3 A   29  TYR CYS GLY                                                  
SEQRES   1 B   29  ARG VAL CYS PRO ARG ILE LEU LEU GLU CYS LYS LYS ASP          
SEQRES   2 B   29  SER ASP CYS LEU ALA GLU CYS VAL CYS LEU GLU HIS GLY          
SEQRES   3 B   29  TYR CYS GLY                                                  
HET     ZN  A 201       1                                                       
HET    GOL  A 202       6                                                       
HET    SO4  B 205       3                                                       
HET    MRD  B 204       8                                                       
HET    GOL  B 203       6                                                       
HETNAM      ZN ZINC ION                                                         
HETNAM     GOL GLYCEROL                                                         
HETNAM     SO4 SULFATE ION                                                      
HETNAM     MRD (4R)-2-METHYLPENTANE-2,4-DIOL                                    
HETSYN     GOL GLYCERIN; PROPANE-1,2,3-TRIOL                                    
FORMUL   3   ZN    ZN 2+                                                        
FORMUL   4  GOL    2(C3 H8 O3)                                                  
FORMUL   5  SO4    O4 S 2-                                                      
FORMUL   6  MRD    C6 H14 O2                                                    
FORMUL   8  HOH   *76(H2 O)                                                     
HELIX    1   1 LYS A   12  CYS A   16  5                                   5    
HELIX    2   2 LYS B   12  CYS B   16  5                                   5    
SHEET    1   A 2 VAL B  21  CYS B  22  0                                        
SHEET    2   A 2 CYS B  28  GLY B  29 -1  O  GLY B  29   N  VAL B  21           
SSBOND   1 CYS A    3    CYS A   20                          1555   1555  2.02  
SSBOND   2 CYS A   10    CYS A   22                          1555   1555  2.06  
SSBOND   3 CYS A   16    CYS A   28                          1555   1555  2.07  
SSBOND   4 CYS B    3    CYS B   20                          1555   1555  2.01  
SSBOND   5 CYS B   10    CYS B   22                          1555   1555  2.05  
SSBOND   6 CYS B   16    CYS B   28                          1555   1555  2.07  
LINK         OE1 GLU A  19                ZN    ZN A 201     1555   1555  1.98  
LINK         OE1 GLU A  19                ZN    ZN A 201     2775   1555  1.98  
LINK        ZN    ZN A 201                 OE2 GLU B  19     1555   1555  2.01  
LINK        ZN    ZN A 201                 OE1 GLU B  19     1555   1555  2.71  
LINK        ZN    ZN A 201                 OE1 GLU B  19     1555   2775  2.71  
LINK        ZN    ZN A 201                 OE2 GLU B  19     1555   2775  2.01  
SITE     1 AC1  2 GLU A  19  GLU B  19                                          
SITE     1 AC2  4 ARG A   1  HOH A 357  GLU B  19  HOH B 347                    
SITE     1 AC3  6 ARG B   5  ASP B  15  CYS B  28  GLY B  29                    
SITE     2 AC3  6 GOL B 203  HOH B 325                                          
SITE     1 AC4  8 CYS A   3  PRO A   4  ARG A   5  SER A  14                    
SITE     2 AC4  8 ASP A  15  CYS A  28  HOH A 310  HOH A 368                    
SITE     1 AC5  4 ILE A   6  GLU B   9  MRD B 204  HOH B 371                    
CRYST1   47.280   58.630   19.320  90.00  90.00  90.00 P 21 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      0.021151  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.017056  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.051760        0.00000