HEADER    TRANSPORT PROTEIN                       21-FEB-06   2G3Z              
TITLE     CRYSTAL STRUCTURE OF TRANSTHYRETIN MUTANT I84A AT LOW PH              
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: TRANSTHYRETIN;                                             
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 SYNONYM: PREALBUMIN, TBPA, TTR, ATTR;                                
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 GENE: TTR, PALB;                                                     
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3);                       
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   8 EXPRESSION_SYSTEM_STRAIN: BL21 (DE3);                                
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: PET11B                                    
KEYWDS    TTR, AMYLOID FIBRILS FORMATION, POINT MUTATION, TRANSPORT PROTEIN     
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    N.PASQUATO,C.FOLLI,R.BERNI,G.ZANOTTI                                  
REVDAT   6   25-OCT-23 2G3Z    1       REMARK                                   
REVDAT   5   10-NOV-21 2G3Z    1       SEQADV                                   
REVDAT   4   13-JUL-11 2G3Z    1       VERSN                                    
REVDAT   3   24-FEB-09 2G3Z    1       VERSN                                    
REVDAT   2   20-FEB-07 2G3Z    1       JRNL                                     
REVDAT   1   16-JAN-07 2G3Z    0                                                
JRNL        AUTH   N.PASQUATO,R.BERNI,C.FOLLI,B.ALFIERI,L.CENDRON,G.ZANOTTI     
JRNL        TITL   ACIDIC PH-INDUCED CONFORMATIONAL CHANGES IN AMYLOIDOGENIC    
JRNL        TITL 2 MUTANT TRANSTHYRETIN.                                        
JRNL        REF    J.MOL.BIOL.                   V. 366   711 2007              
JRNL        REFN                   ISSN 0022-2836                               
JRNL        PMID   17196219                                                     
JRNL        DOI    10.1016/J.JMB.2006.11.076                                    
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   A.HORNBERG,T.ENEQVIST,A.OLOFSSON,E.LUNDGREN,                 
REMARK   1  AUTH 2 A.E.SAUER-ERIKSSON                                           
REMARK   1  TITL   A COMPARATIVE ANALYSIS OF 23 STRUCTURES OF THE AMYLOIDOGENIC 
REMARK   1  TITL 2 PROTEIN TRANSTHYRETIN                                        
REMARK   1  REF    J.MOL.BIOL.                   V. 302   649 2000              
REMARK   1  REFN                   ISSN 0022-2836                               
REMARK   1  PMID   10986125                                                     
REMARK   1  DOI    10.1006/JMBI.2000.4078                                       
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.90 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 1.1                                              
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) : 1.90                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 42.71                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 1303952.080                    
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0000                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 92.4                           
REMARK   3   NUMBER OF REFLECTIONS             : 16940                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.204                           
REMARK   3   FREE R VALUE                     : 0.245                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 10.000                          
REMARK   3   FREE R VALUE TEST SET COUNT      : 1695                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.006                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 6                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.90                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.02                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 95.60                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 2585                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2890                       
REMARK   3   BIN FREE R VALUE                    : 0.2940                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 9.80                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 282                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.018                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1764                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 287                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 19.40                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 36.20                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -1.43000                                             
REMARK   3    B22 (A**2) : -2.88000                                             
REMARK   3    B33 (A**2) : 4.31000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.24                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.26                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.27                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.23                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.008                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.500                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 27.00                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 0.000                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : RESTRAINED                                
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 1.590 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 2.490 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 2.200 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 3.400 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.38                                                 
REMARK   3   BSOL        : 95.45                                                
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  : PROTEIN_REP.PARAM                              
REMARK   3  PARAMETER FILE  2  : WATER_REP.PARAM                                
REMARK   3  PARAMETER FILE  3  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : WATER_REP.TOP                                  
REMARK   3  TOPOLOGY FILE  3   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 2G3Z COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 28-FEB-06.                  
REMARK 100 THE DEPOSITION ID IS D_1000036658.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 12-APR-05                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 4.6                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : ELETTRA                            
REMARK 200  BEAMLINE                       : 5.2R                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.2                                
REMARK 200  MONOCHROMATOR                  : SI(111)                            
REMARK 200  OPTICS                         : MIRRORS                            
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MARRESEARCH                        
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : MOSFLM                             
REMARK 200  DATA SCALING SOFTWARE          : CCP4 (SCALA)                       
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 17076                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.900                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 42.700                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 94.1                               
REMARK 200  DATA REDUNDANCY                : 3.800                              
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : 0.12600                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 4.1000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.90                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.00                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 94.0                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.70                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : 0.34400                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.200                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: AMORE                                                 
REMARK 200 STARTING MODEL: 1F41                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 39.51                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.03                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 15% PEG MONOMETHYL ETHER, 0.1M           
REMARK 280  AMMONIUM SULPHATE, 50MM SODIUM ACETATE, PH 4.6, VAPOR DIFFUSION,    
REMARK 280  HANGING DROP, TEMPERATURE 298K                                      
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       21.14000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       42.71000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       21.14000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       42.71000            
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: THE BIOLOGICAL ASEMBLY IS A HOMO-TETRAMER, OBTAINED THROUGH  
REMARK 300 ROTATION OF THE DIMER IN TE ASYMMETRIC UNIT AROUND THE               
REMARK 300 CRYSTALLOGRAPHIC TWO-FOLD AXIS (-X,-Y,Z)                             
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: 6520 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 18910 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -50.0 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       42.28000            
REMARK 350   BIOMT2   2  0.000000 -1.000000  0.000000       85.42000            
REMARK 350   BIOMT3   2  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     GLY A     1                                                      
REMARK 465     PRO A     2                                                      
REMARK 465     THR A     3                                                      
REMARK 465     GLY A     4                                                      
REMARK 465     THR A     5                                                      
REMARK 465     GLY A     6                                                      
REMARK 465     GLU A     7                                                      
REMARK 465     SER A     8                                                      
REMARK 465     LYS A     9                                                      
REMARK 465     ASN A   124                                                      
REMARK 465     PRO A   125                                                      
REMARK 465     LYS A   126                                                      
REMARK 465     GLU A   127                                                      
REMARK 465     GLY B     1                                                      
REMARK 465     PRO B     2                                                      
REMARK 465     THR B     3                                                      
REMARK 465     GLY B     4                                                      
REMARK 465     THR B     5                                                      
REMARK 465     GLY B     6                                                      
REMARK 465     GLU B     7                                                      
REMARK 465     SER B     8                                                      
REMARK 465     LYS B     9                                                      
REMARK 465     PRO B   125                                                      
REMARK 465     LYS B   126                                                      
REMARK 465     GLU B   127                                                      
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   OG   SER A    23     O    HOH A   168              2.17            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   O    HOH B   137     O    HOH B   137     2665     1.09            
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    GLU A  63   CD    GLU A  63   OE2     0.082                       
REMARK 500    GLU B  63   CD    GLU B  63   OE2     0.084                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    LYS B  80   N   -  CA  -  C   ANGL. DEV. = -21.1 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    ASP A  39       -0.18     72.84                                   
REMARK 500    TYR B  78      162.90    -48.37                                   
REMARK 500    TRP B  79       89.94     62.29                                   
REMARK 500    LEU B  82      -62.13     50.00                                   
REMARK 500    PRO B 102      159.86    -45.46                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1F41   RELATED DB: PDB                                   
REMARK 900 THE SAME PROTEIN AT 1.5 A RESOLUTION                                 
REMARK 900 RELATED ID: 2G3X   RELATED DB: PDB                                   
REMARK 900 THE SAME PROTEIN(I84S) AT PH 4.6                                     
REMARK 900 RELATED ID: 2G4E   RELATED DB: PDB                                   
REMARK 900 THE SAME PROTEIN(I84A) AT PH 7.5                                     
REMARK 900 RELATED ID: 2G4G   RELATED DB: PDB                                   
REMARK 900 THE SAME PROTEIN AT PH 4.6                                           
DBREF  2G3Z A    1   127  UNP    P02766   TTHY_HUMAN      21    147             
DBREF  2G3Z B    1   127  UNP    P02766   TTHY_HUMAN      21    147             
SEQADV 2G3Z ALA A   84  UNP  P02766    ILE   104 ENGINEERED MUTATION            
SEQADV 2G3Z ALA B   84  UNP  P02766    ILE   104 ENGINEERED MUTATION            
SEQRES   1 A  127  GLY PRO THR GLY THR GLY GLU SER LYS CYS PRO LEU MET          
SEQRES   2 A  127  VAL LYS VAL LEU ASP ALA VAL ARG GLY SER PRO ALA ILE          
SEQRES   3 A  127  ASN VAL ALA VAL HIS VAL PHE ARG LYS ALA ALA ASP ASP          
SEQRES   4 A  127  THR TRP GLU PRO PHE ALA SER GLY LYS THR SER GLU SER          
SEQRES   5 A  127  GLY GLU LEU HIS GLY LEU THR THR GLU GLU GLU PHE VAL          
SEQRES   6 A  127  GLU GLY ILE TYR LYS VAL GLU ILE ASP THR LYS SER TYR          
SEQRES   7 A  127  TRP LYS ALA LEU GLY ALA SER PRO PHE HIS GLU HIS ALA          
SEQRES   8 A  127  GLU VAL VAL PHE THR ALA ASN ASP SER GLY PRO ARG ARG          
SEQRES   9 A  127  TYR THR ILE ALA ALA LEU LEU SER PRO TYR SER TYR SER          
SEQRES  10 A  127  THR THR ALA VAL VAL THR ASN PRO LYS GLU                      
SEQRES   1 B  127  GLY PRO THR GLY THR GLY GLU SER LYS CYS PRO LEU MET          
SEQRES   2 B  127  VAL LYS VAL LEU ASP ALA VAL ARG GLY SER PRO ALA ILE          
SEQRES   3 B  127  ASN VAL ALA VAL HIS VAL PHE ARG LYS ALA ALA ASP ASP          
SEQRES   4 B  127  THR TRP GLU PRO PHE ALA SER GLY LYS THR SER GLU SER          
SEQRES   5 B  127  GLY GLU LEU HIS GLY LEU THR THR GLU GLU GLU PHE VAL          
SEQRES   6 B  127  GLU GLY ILE TYR LYS VAL GLU ILE ASP THR LYS SER TYR          
SEQRES   7 B  127  TRP LYS ALA LEU GLY ALA SER PRO PHE HIS GLU HIS ALA          
SEQRES   8 B  127  GLU VAL VAL PHE THR ALA ASN ASP SER GLY PRO ARG ARG          
SEQRES   9 B  127  TYR THR ILE ALA ALA LEU LEU SER PRO TYR SER TYR SER          
SEQRES  10 B  127  THR THR ALA VAL VAL THR ASN PRO LYS GLU                      
FORMUL   3  HOH   *287(H2 O)                                                    
HELIX    1   1 ASP A   74  ALA A   81  1                                   8    
SHEET    1   A 8 SER A  23  PRO A  24  0                                        
SHEET    2   A 8 LEU A  12  ASP A  18 -1  N  ASP A  18   O  SER A  23           
SHEET    3   A 8 TYR A 105  SER A 112  1  O  ALA A 109   N  LEU A  17           
SHEET    4   A 8 SER A 115  VAL A 122 -1  O  THR A 119   N  ALA A 108           
SHEET    5   A 8 SER B 115  THR B 123 -1  O  THR B 118   N  TYR A 116           
SHEET    6   A 8 ARG B 104  SER B 112 -1  N  ALA B 108   O  THR B 119           
SHEET    7   A 8 LEU B  12  ASP B  18  1  N  LEU B  17   O  ALA B 109           
SHEET    8   A 8 SER B  23  PRO B  24 -1  O  SER B  23   N  ASP B  18           
SHEET    1   B 8 GLU A  54  LEU A  55  0                                        
SHEET    2   B 8 LEU A  12  ASP A  18 -1  N  VAL A  14   O  LEU A  55           
SHEET    3   B 8 TYR A 105  SER A 112  1  O  ALA A 109   N  LEU A  17           
SHEET    4   B 8 SER A 115  VAL A 122 -1  O  THR A 119   N  ALA A 108           
SHEET    5   B 8 SER B 115  THR B 123 -1  O  THR B 118   N  TYR A 116           
SHEET    6   B 8 ARG B 104  SER B 112 -1  N  ALA B 108   O  THR B 119           
SHEET    7   B 8 LEU B  12  ASP B  18  1  N  LEU B  17   O  ALA B 109           
SHEET    8   B 8 GLU B  54  LEU B  55 -1  O  LEU B  55   N  VAL B  14           
SHEET    1   C 8 TRP A  41  LYS A  48  0                                        
SHEET    2   C 8 ALA A  29  LYS A  35 -1  N  VAL A  32   O  ALA A  45           
SHEET    3   C 8 GLY A  67  ILE A  73 -1  O  GLU A  72   N  HIS A  31           
SHEET    4   C 8 ALA A  91  ALA A  97 -1  O  ALA A  91   N  ILE A  73           
SHEET    5   C 8 HIS B  90  ALA B  97 -1  O  HIS B  90   N  VAL A  94           
SHEET    6   C 8 GLY B  67  ASP B  74 -1  N  VAL B  71   O  VAL B  93           
SHEET    7   C 8 ALA B  29  LYS B  35 -1  N  LYS B  35   O  ILE B  68           
SHEET    8   C 8 TRP B  41  LYS B  48 -1  O  GLU B  42   N  ARG B  34           
CRYST1   42.280   85.420   61.899  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      0.023652  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.011707  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.016155        0.00000