HEADER    OXIDOREDUCTASE                          17-MAY-00   1E26              
TITLE     DESIGN, SYNTHESIS AND X-RAY CRYSTAL STRUCTURE OF A POTENT DUAL        
TITLE    2 INHIBITOR OF THYMIDYLATE SYNTHASE AND DIHYDROFOLATE REDUCTASE AS AN  
TITLE    3 ANTITUMOR AGENT.                                                     
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: DIHYDROFOLATE REDUCTASE;                                   
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: PCDHFR;                                                     
COMPND   5 EC: 1.5.1.3;                                                         
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 OTHER_DETAILS: COMPLEXED WITH NADPH AND INHIBITOR                    
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: PNEUMOCYSTIS CARINII;                           
SOURCE   3 ORGANISM_TAXID: 4754;                                                
SOURCE   4 GENE: C-DNA P.CARINII DHFR;                                          
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_PLASMID: PT7-7;                                    
SOURCE   8 EXPRESSION_SYSTEM_GENE: C-DNA P.CARINII DHFR                         
KEYWDS    OXIDOREDUCTASE, DIHYDROFOLATE REDUCTASE, THYMIDYLATE SYNTHASE         
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    A.GANGJEE,J.YU,J.J.MCGUIRE,V.CODY,N.GALITSKY,R.L.KISLIUK,S.F.QUEENER  
REVDAT   6   06-DEC-23 1E26    1       REMARK                                   
REVDAT   5   08-MAY-19 1E26    1       REMARK                                   
REVDAT   4   23-MAY-18 1E26    1       REMARK                                   
REVDAT   3   24-FEB-09 1E26    1       VERSN                                    
REVDAT   2   18-JUL-03 1E26    1       JRNL                                     
REVDAT   1   17-MAY-01 1E26    0                                                
JRNL        AUTH   V.CODY,N.GALITSKY,D.RAK,J.R.LUFT,W.PANGBORN,S.F.QUEENER      
JRNL        TITL   LIGAND-INDUCED CONFORMATIONAL CHANGES IN THE CRYSTAL         
JRNL        TITL 2 STRUCTURES OF PNEUMOCYSTIS CARINII DIHYDROFOLATE REDUCTASE   
JRNL        TITL 3 COMPLEXES WITH FOLATE AND NADP+                              
JRNL        REF    BIOCHEMISTRY                  V.  38  4303 1999              
JRNL        REFN                   ISSN 0006-2960                               
JRNL        PMID   10194348                                                     
JRNL        DOI    10.1021/BI982728M                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.00 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS                                                  
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : NULL                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.00                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 100.00                         
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : NULL                           
REMARK   3   NUMBER OF REFLECTIONS             : 13297                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.219                           
REMARK   3   FREE R VALUE                     : 0.297                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 10.000                          
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            : 1678                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 79                                      
REMARK   3   SOLVENT ATOMS            : 101                                     
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) : 0.008                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.500                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : NULL                            
REMARK   3   IMPROPER ANGLES        (DEGREES) : NULL                            
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : NULL                                      
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : NULL                                                 
REMARK   3   KSOL        : NULL                                                 
REMARK   3   BSOL        : NULL                                                 
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: THE C-TERMINAL MET RESIDUE WAS NOT SEEN   
REMARK   3  IN THE DENSITY MAPS                                                 
REMARK   4                                                                      
REMARK   4 1E26 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 17-MAY-00.                  
REMARK 100 THE DEPOSITION ID IS D_1290004967.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 15-JAN-99                          
REMARK 200  TEMPERATURE           (KELVIN) : 293.0                              
REMARK 200  PH                             : 6.00                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : ROTATING ANODE                     
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : RIGAKU RU200HB                     
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                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU RAXIS IIC                   
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 11919                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.000                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 100.000                            
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.4                               
REMARK 200  DATA REDUNDANCY                : 2.600                              
REMARK 200  R MERGE                    (I) : 0.05400                            
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: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: NULL                                                  
REMARK 200 STARTING MODEL: 2CD2                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 48.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.97                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PROTEIN SOLUTION: WASHED AND             
REMARK 280  CONCENTRATED 4 TUBES PCDHFR USING A CENTRICON 10 50 MM MES,         
REMARK 280  100MM KCL, B-NADPH, PH 6.0, A280/340 RATIO OF 24. WASHED WITH       
REMARK 280  50MM MES, 100MM KCL, PH 6.0, WASHED WITH 50MM MES, 100MM KCL, PH    
REMARK 280  6.0 TO A CONCENTRATION OF 6.5 MG/ML. RESERVOIR SOLUTION: 50%        
REMARK 280  PEG2000MME, 50MM MES, 100MM, PH 6.0 SET UP MICROBATCH               
REMARK 280  POLYTHERMAL GRADIENT EXPERIMENTS IN MICROPETS. DROPS WERE           
REMARK 280  COMPOSED OF: 2.5 MICROLITERS PROTEIN SOLUTION 2.0 MICROLITERS       
REMARK 280  PROTEIN SOLUTION 0.5 MICROLITERS 50MM MES, 100MM KCL, PH 6.0.       
REMARK 280  MICROPETS WERE LEFT TO EQUILIBRATE ON THE POLYTHERMAL GRADIENT.,    
REMARK 280  PH 6.00                                                             
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y+1/2,-Z                                             
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000       21.61550            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                  
REMARK 350 SOFTWARE USED: PQS                                                   
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 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     MET A     1                                                      
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   NZ   LYS A     5     O    ASN A   118              2.19            
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    GLY A  89   CA    GLY A  89   C       0.123                       
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    GLY A 124   N   -  CA  -  C   ANGL. DEV. =  15.8 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    GLN A   4      -53.98   -122.12                                   
REMARK 500    SER A  24     -161.36   -129.16                                   
REMARK 500    PRO A  26       35.81    -63.13                                   
REMARK 500    SER A  51      151.56    -49.93                                   
REMARK 500    ILE A  92      109.22    -15.51                                   
REMARK 500    ASN A 118      -73.77   -101.77                                   
REMARK 500    LYS A 148      128.93   -178.14                                   
REMARK 500    GLU A 192      110.41   -161.80                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 525                                                                      
REMARK 525 SOLVENT                                                              
REMARK 525                                                                      
REMARK 525 THE SOLVENT MOLECULES HAVE CHAIN IDENTIFIERS THAT                    
REMARK 525 INDICATE THE POLYMER CHAIN WITH WHICH THEY ARE MOST                  
REMARK 525 CLOSELY ASSOCIATED. THE REMARK LISTS ALL THE SOLVENT                 
REMARK 525 MOLECULES WHICH ARE MORE THAN 5A AWAY FROM THE                       
REMARK 525 NEAREST POLYMER CHAIN (M = MODEL NUMBER;                             
REMARK 525 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE                  
REMARK 525 NUMBER; I=INSERTION CODE):                                           
REMARK 525                                                                      
REMARK 525  M RES CSSEQI                                                        
REMARK 525    HOH A2027        DISTANCE =  5.86 ANGSTROMS                       
REMARK 700                                                                      
REMARK 700 SHEET                                                                
REMARK 700 THE SHEET STRUCTURE OF THIS MOLECULE IS BIFURCATED.  IN              
REMARK 700 ORDER TO REPRESENT THIS FEATURE IN THE SHEET RECORDS BELOW,          
REMARK 700 TWO SHEETS ARE DEFINED.  STRANDS 1 TO 7 SHEETS A AND A1              
REMARK 700 ARE IDENTICAL.                                                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NAP A 207                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GPB A 208                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 2CD2   RELATED DB: PDB                                   
REMARK 900 LIGAND INDUCED CONFORMATIONAL CHANGES IN THE CRYSTAL STRUCTURES OF   
REMARK 900 PNEUMOCYSTIS CARINII DIHYDROFOLATE REDUCTASE COMPLEXES WITH FOLATE   
REMARK 900 AND NADP+                                                            
REMARK 900 RELATED ID: 3CD2   RELATED DB: PDB                                   
REMARK 900 LIGAND INDUCED CONFORMATIONAL CHANGES IN THE CRYSTAL STRUCTURES OF   
REMARK 900 PNEUMOCYSTIS CARINII DIHYDROFOLATE REDUCTASE COMPLEXES WITH FOLATE   
REMARK 900 AND NADP+                                                            
REMARK 900 RELATED ID: 4CD2   RELATED DB: PDB                                   
REMARK 900 LIGAND INDUCED CONFORMATIONAL CHANGES IN THE CRYSTAL STRUCTURES OF   
REMARK 900 PNEUMOCYSTIS CARINII DIHYDROFOLATE REDUCTASE COMPLEXES WITH FOLATE   
REMARK 900 AND NADP+                                                            
REMARK 900 RELATED ID: 1DYR   RELATED DB: PDB                                   
REMARK 900 THE STRUCTURE OF PNEUMOCYSTIS CARINII DIHYDROFOLATE REDUCTASE TO     
REMARK 900 1.9 ANGSTROMS RESOLUTION                                             
REMARK 900 RELATED ID: 1DAJ   RELATED DB: PDB                                   
REMARK 900 COMPARISON OF TERNARY COMPLEXES OF PNEUMOCYSTIS CARINII AND WILD     
REMARK 900 TYPE HUMAN DIHYDROFOLATE REDUCTASE WITH COENZYME NADPH AND A NOVEL   
REMARK 900 CLASSICAL ANTITUMOR FURO[2,3D]PYRIMIDINE ANTIFOLATE                  
DBREF  1E26 A    1   206  UNP    P16184   DYR_PNECA        1    206             
SEQRES   1 A  206  MET ASN GLN GLN LYS SER LEU THR LEU ILE VAL ALA LEU          
SEQRES   2 A  206  THR THR SER TYR GLY ILE GLY ARG SER ASN SER LEU PRO          
SEQRES   3 A  206  TRP LYS LEU LYS LYS GLU ILE SER TYR PHE LYS ARG VAL          
SEQRES   4 A  206  THR SER PHE VAL PRO THR PHE ASP SER PHE GLU SER MET          
SEQRES   5 A  206  ASN VAL VAL LEU MET GLY ARG LYS THR TRP GLU SER ILE          
SEQRES   6 A  206  PRO LEU GLN PHE ARG PRO LEU LYS GLY ARG ILE ASN VAL          
SEQRES   7 A  206  VAL ILE THR ARG ASN GLU SER LEU ASP LEU GLY ASN GLY          
SEQRES   8 A  206  ILE HIS SER ALA LYS SER LEU ASP HIS ALA LEU GLU LEU          
SEQRES   9 A  206  LEU TYR ARG THR TYR GLY SER GLU SER SER VAL GLN ILE          
SEQRES  10 A  206  ASN ARG ILE PHE VAL ILE GLY GLY ALA GLN LEU TYR LYS          
SEQRES  11 A  206  ALA ALA MET ASP HIS PRO LYS LEU ASP ARG ILE MET ALA          
SEQRES  12 A  206  THR ILE ILE TYR LYS ASP ILE HIS CYS ASP VAL PHE PHE          
SEQRES  13 A  206  PRO LEU LYS PHE ARG ASP LYS GLU TRP SER SER VAL TRP          
SEQRES  14 A  206  LYS LYS GLU LYS HIS SER ASP LEU GLU SER TRP VAL GLY          
SEQRES  15 A  206  THR LYS VAL PRO HIS GLY LYS ILE ASN GLU ASP GLY PHE          
SEQRES  16 A  206  ASP TYR GLU PHE GLU MET TRP THR ARG ASP LEU                  
HET    NAP  A 207      48                                                       
HET    GPB  A 208      31                                                       
HETNAM     NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE                 
HETNAM     GPB N-[4-[2-(2-AMINO-4-METHYL-7H-PYRROLO[2,3-D]PYRIMIDIN-5-          
HETNAM   2 GPB  YL)-ETHYL]-BENZOYL]GLUTAMIC ACID                                
HETSYN     NAP 2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE                       
FORMUL   2  NAP    C21 H28 N7 O17 P3                                            
FORMUL   3  GPB    C21 H23 N5 O5                                                
FORMUL   4  HOH   *101(H2 O)                                                    
HELIX    1   1 LEU A   29  PHE A   42  1                                  14    
HELIX    2   2 THR A   45  PHE A   49  5                                   5    
HELIX    3   3 ARG A   59  SER A   64  1                                   6    
HELIX    4   4 SER A   97  TYR A  109  1                                  13    
HELIX    5   5 GLY A  125  HIS A  135  1                                  11    
HELIX    6   6 ASP A  162  SER A  166  5                                   5    
HELIX    7   7 LYS A  173  GLY A  182  1                                  10    
SHEET    1   A 8 HIS A  93  ALA A  95  0                                        
SHEET    2   A 8 ILE A  76  ILE A  80  1  O  ASN A  77   N  HIS A  93           
SHEET    3   A 8 SER A  51  GLY A  58  1  O  ASN A  53   N  ILE A  76           
SHEET    4   A 8 GLN A 116  GLY A 124  1  O  GLN A 116   N  MET A  52           
SHEET    5   A 8 LEU A   7  THR A  14  1  O  THR A   8   N  VAL A 122           
SHEET    6   A 8 LEU A 138  ILE A 146  1  N  ASP A 139   O  LEU A   7           
SHEET    7   A 8 ASP A 196  THR A 203 -1  O  GLU A 198   N  ILE A 145           
SHEET    8   A 8 LYS A 170  LYS A 171 -1  O  LYS A 170   N  THR A 203           
SHEET    1  A1 8 HIS A  93  ALA A  95  0                                        
SHEET    2  A1 8 ILE A  76  ILE A  80  1  O  ASN A  77   N  HIS A  93           
SHEET    3  A1 8 SER A  51  GLY A  58  1  O  ASN A  53   N  ILE A  76           
SHEET    4  A1 8 GLN A 116  GLY A 124  1  O  GLN A 116   N  MET A  52           
SHEET    5  A1 8 LEU A   7  THR A  14  1  O  THR A   8   N  VAL A 122           
SHEET    6  A1 8 LEU A 138  ILE A 146  1  N  ASP A 139   O  LEU A   7           
SHEET    7  A1 8 ASP A 196  THR A 203 -1  O  GLU A 198   N  ILE A 145           
SHEET    8  A1 8 ILE A 190  ASN A 191 -1  O  ILE A 190   N  TYR A 197           
SHEET    1   B 2 GLY A  18  GLY A  20  0                                        
SHEET    2   B 2 VAL A 154  PHE A 155 -1  O  VAL A 154   N  ILE A  19           
CISPEP   1 ARG A   70    PRO A   71          0        -0.14                     
SITE     1 AC1 23 VAL A  11  ALA A  12  ILE A  19  ASN A  23                    
SITE     2 AC1 23 SER A  24  LEU A  25  GLY A  58  ARG A  59                    
SITE     3 AC1 23 LYS A  60  THR A  61  ILE A  80  THR A  81                    
SITE     4 AC1 23 ARG A  82  ASN A  83  LYS A  96  ILE A 123                    
SITE     5 AC1 23 GLY A 124  GLY A 125  ALA A 126  GLN A 127                    
SITE     6 AC1 23 LEU A 128  TYR A 129  GPB A 208                               
SITE     1 AC2 14 ILE A  10  VAL A  11  ALA A  12  LEU A  25                    
SITE     2 AC2 14 GLU A  32  ILE A  33  PHE A  36  LYS A  37                    
SITE     3 AC2 14 PHE A  69  ARG A  75  ILE A 123  THR A 144                    
SITE     4 AC2 14 NAP A 207  HOH A2101                                          
CRYST1   37.332   43.231   61.241  90.00  94.59  90.00 P 1 21 1      2          
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      0.026787  0.000000  0.002150        0.00000                         
SCALE2      0.000000  0.023131  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.016381        0.00000