HEADER    IMMUNE SYSTEM                           29-JAN-20   6XY2              
TITLE     CRYSTAL STRUCTURE OF CTLA-4 COMPLEXED WITH THE FAB OF HL32 ANTIBODY   
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CYTOTOXIC T-LYMPHOCYTE PROTEIN 4;                          
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: CYTOTOXIC T-LYMPHOCYTE-ASSOCIATED ANTIGEN 4,CTLA-4;         
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MOL_ID: 2;                                                           
COMPND   7 MOLECULE: HEAVY CHAIN;                                               
COMPND   8 CHAIN: H;                                                            
COMPND   9 ENGINEERED: YES;                                                     
COMPND  10 MOL_ID: 3;                                                           
COMPND  11 MOLECULE: LIGHT CHAIN;                                               
COMPND  12 CHAIN: L;                                                            
COMPND  13 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 GENE: CTLA4, CD152;                                                  
SOURCE   6 EXPRESSION_SYSTEM: HOMO SAPIENS;                                     
SOURCE   7 EXPRESSION_SYSTEM_COMMON: HUMAN;                                     
SOURCE   8 EXPRESSION_SYSTEM_TAXID: 9606;                                       
SOURCE   9 EXPRESSION_SYSTEM_CELL_LINE: HEK293;                                 
SOURCE  10 MOL_ID: 2;                                                           
SOURCE  11 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE  12 ORGANISM_COMMON: HUMAN;                                              
SOURCE  13 ORGANISM_TAXID: 9606;                                                
SOURCE  14 EXPRESSION_SYSTEM: HOMO SAPIENS;                                     
SOURCE  15 EXPRESSION_SYSTEM_COMMON: HUMAN;                                     
SOURCE  16 EXPRESSION_SYSTEM_TAXID: 9606;                                       
SOURCE  17 EXPRESSION_SYSTEM_CELL_LINE: HEK293;                                 
SOURCE  18 MOL_ID: 3;                                                           
SOURCE  19 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE  20 ORGANISM_COMMON: HUMAN;                                              
SOURCE  21 ORGANISM_TAXID: 9606;                                                
SOURCE  22 EXPRESSION_SYSTEM: HOMO SAPIENS;                                     
SOURCE  23 EXPRESSION_SYSTEM_COMMON: HUMAN;                                     
SOURCE  24 EXPRESSION_SYSTEM_TAXID: 9606;                                       
SOURCE  25 EXPRESSION_SYSTEM_CELL_LINE: HEK293                                  
KEYWDS    CTLA-4, FAB, ANTIBODY, IMMUNNOTHERAPY, IMMUNE SYSTEM                  
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    H.GAO,A.ZHOU                                                          
REVDAT   4   09-OCT-24 6XY2    1       REMARK                                   
REVDAT   3   24-JAN-24 6XY2    1       REMARK                                   
REVDAT   2   23-DEC-20 6XY2    1       JRNL                                     
REVDAT   1   09-DEC-20 6XY2    0                                                
JRNL        AUTH   H.GAO,H.CAI,J.LIU,X.WANG,P.ZHENG,M.DEVENPORT,T.XU,F.DOU,     
JRNL        AUTH 2 Y.LIU,A.ZHOU                                                 
JRNL        TITL   STRUCTURE OF CTLA-4 COMPLEXED WITH A PH-SENSITIVE CANCER     
JRNL        TITL 2 IMMUNOTHERAPEUTIC ANTIBODY.                                  
JRNL        REF    CELL DISCOV                   V.   6    79 2020              
JRNL        REFN                   ESSN 2056-5968                               
JRNL        PMID   33298884                                                     
JRNL        DOI    10.1038/S41421-020-00202-9                                   
REMARK   2                                                                      
REMARK   2 RESOLUTION.    3.05 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : PHENIX 1.16_3549                                     
REMARK   3   AUTHORS     : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN            
REMARK   3               : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE,           
REMARK   3               : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER,            
REMARK   3               : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY,              
REMARK   3               : REETAL PAI,RANDY READ,JANE RICHARDSON,               
REMARK   3               : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI,           
REMARK   3               : NICHOLAS SAUTER,JACOB SMITH,LAURENT                  
REMARK   3               : STORONI,TOM TERWILLIGER,PETER ZWART                  
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : GEOSTD + MONOMER LIBRARY + CDL V1.2           
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 3.05                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 75.33                          
REMARK   3   MIN(FOBS/SIGMA_FOBS)              : 1.340                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.7                           
REMARK   3   NUMBER OF REFLECTIONS             : 27133                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.251                           
REMARK   3   R VALUE            (WORKING SET) : 0.249                           
REMARK   3   FREE R VALUE                     : 0.293                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.090                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1380                            
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (IN BINS).                           
REMARK   3   BIN  RESOLUTION RANGE  COMPL.    NWORK NFREE   RWORK  RFREE        
REMARK   3     1 10.0000 -  6.5700    0.99     2705   153  0.2453 0.2553        
REMARK   3     2  6.5700 -  5.2100    1.00     2612   153  0.2218 0.2984        
REMARK   3     3  5.2100 -  4.5600    1.00     2597   136  0.1911 0.2369        
REMARK   3     4  4.5600 -  4.1400    1.00     2576   132  0.2013 0.2784        
REMARK   3     5  4.1400 -  3.8400    1.00     2570   123  0.2579 0.2925        
REMARK   3     6  3.8400 -  3.6200    1.00     2588   120  0.2722 0.3648        
REMARK   3     7  3.6200 -  3.4400    1.00     2540   136  0.2928 0.3122        
REMARK   3     8  3.4400 -  3.2900    1.00     2534   148  0.3260 0.3733        
REMARK   3     9  3.2900 -  3.1600    1.00     2497   146  0.3896 0.4221        
REMARK   3    10  3.1600 -  3.0500    1.00     2534   133  0.4794 0.4794        
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED        : FLAT BULK SOLVENT MODEL                       
REMARK   3   SOLVENT RADIUS     : 1.11                                          
REMARK   3   SHRINKAGE RADIUS   : 0.90                                          
REMARK   3   K_SOL              : NULL                                          
REMARK   3   B_SOL              : NULL                                          
REMARK   3                                                                      
REMARK   3  ERROR ESTIMATES.                                                    
REMARK   3   COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED)     : 0.536            
REMARK   3   PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 35.734           
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 100.7                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 70.00                          
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  TWINNING INFORMATION.                                               
REMARK   3   FRACTION: NULL                                                     
REMARK   3   OPERATOR: NULL                                                     
REMARK   3                                                                      
REMARK   3  DEVIATIONS FROM IDEAL VALUES.                                       
REMARK   3                 RMSD          COUNT                                  
REMARK   3   BOND      :  0.002           4260                                  
REMARK   3   ANGLE     :  0.553           5821                                  
REMARK   3   CHIRALITY :  0.045            677                                  
REMARK   3   PLANARITY :  0.004            742                                  
REMARK   3   DIHEDRAL  :  8.276           2504                                  
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : 1                                          
REMARK   3   TLS GROUP : 1                                                      
REMARK   3    SELECTION: ALL                                                    
REMARK   3    ORIGIN FOR THE GROUP (A):  28.2865  32.5359 -10.0469              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.9828 T22:   0.7293                                     
REMARK   3      T33:   0.6932 T12:  -0.1023                                     
REMARK   3      T13:  -0.0276 T23:  -0.0641                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   0.7966 L22:   5.0754                                     
REMARK   3      L33:   0.7159 L12:   1.0507                                     
REMARK   3      L13:  -0.2991 L23:  -0.9918                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:  -0.1061 S12:   0.0744 S13:   0.1542                       
REMARK   3      S21:  -0.0714 S22:   0.2478 S23:   0.0270                       
REMARK   3      S31:  -0.1786 S32:   0.1090 S33:  -0.1285                       
REMARK   3                                                                      
REMARK   3  NCS DETAILS                                                         
REMARK   3   NUMBER OF NCS GROUPS : NULL                                        
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 6XY2 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 29-JAN-20.                  
REMARK 100 THE DEPOSITION ID IS D_1292106302.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 13-JAN-20                          
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               : SSRF                               
REMARK 200  BEAMLINE                       : BL19U1                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.97892                            
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : PIXEL                              
REMARK 200  DETECTOR MANUFACTURER          : DECTRIS PILATUS3 S 6M              
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : MOSFLM                             
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 29874                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.950                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 85.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.9                               
REMARK 200  DATA REDUNDANCY                : 7.900                              
REMARK 200  R MERGE                    (I) : 0.13300                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 7.4000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.95                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 3.11                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : NULL                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : 1.86500                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 0.700                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: PHASER                                                
REMARK 200 STARTING MODEL: 3OSK                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 77.62                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 5.50                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 1M LI2SO4, 1.5M NH4SO4, 0.1M SODIUM      
REMARK 280  CITRATE, PH 6.5, BATCH MODE, TEMPERATURE 293K                       
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 2 2 21                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z+1/2                                             
REMARK 290       3555   -X,Y,-Z+1/2                                             
REMARK 290       4555   X,-Y,-Z                                                 
REMARK 290       5555   X+1/2,Y+1/2,Z                                           
REMARK 290       6555   -X+1/2,-Y+1/2,Z+1/2                                     
REMARK 290       7555   -X+1/2,Y+1/2,-Z+1/2                                     
REMARK 290       8555   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       33.46750            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       33.46750            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   5  1.000000  0.000000  0.000000       81.93100            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000      127.23900            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   6 -1.000000  0.000000  0.000000       81.93100            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000      127.23900            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       33.46750            
REMARK 290   SMTRY1   7 -1.000000  0.000000  0.000000       81.93100            
REMARK 290   SMTRY2   7  0.000000  1.000000  0.000000      127.23900            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000       33.46750            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000       81.93100            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000      127.23900            
REMARK 290   SMTRY3   8  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 AUTHOR DETERMINED BIOLOGICAL UNIT: TRIMERIC                          
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TRIMERIC                   
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 5280 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 25440 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -29.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, H, L                               
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     GLU A   120                                                      
REMARK 465     PRO A   121                                                      
REMARK 465     CYS A   122                                                      
REMARK 465     PRO A   123                                                      
REMARK 465     ASP A   124                                                      
REMARK 465     SER A   125                                                      
REMARK 465     GLN H     1                                                      
REMARK 465     SER H   144                                                      
REMARK 465     GLY H   145                                                      
REMARK 465     CYS H   228                                                      
REMARK 465     ASP H   229                                                      
REMARK 465     LYS H   230                                                      
REMARK 465     THR H   231                                                      
REMARK 465     HIS H   232                                                      
REMARK 465     THR H   233                                                      
REMARK 465     MET H   234                                                      
REMARK 465     ASP H   235                                                      
REMARK 465     PRO H   236                                                      
REMARK 465     GLY H   237                                                      
REMARK 465     GLY H   238                                                      
REMARK 465     SER H   239                                                      
REMARK 465     HIS H   240                                                      
REMARK 465     HIS H   241                                                      
REMARK 465     HIS H   242                                                      
REMARK 465     HIS H   243                                                      
REMARK 465     HIS H   244                                                      
REMARK 465     HIS H   245                                                      
REMARK 465     HIS H   246                                                      
REMARK 465     HIS H   247                                                      
REMARK 465     GLU L   213                                                      
REMARK 465     CYS L   214                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     LYS H  64    CG   CD   CE   NZ                                   
REMARK 470     LYS H  97    CG   CD   CE   NZ                                   
REMARK 470     LYS H 129    CG   CD   CE   NZ                                   
REMARK 470     LYS H 141    CG   CD   CE   NZ                                   
REMARK 470     LYS H 226    CG   CD   CE   NZ                                   
REMARK 470     ARG L  24    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     LYS L  45    CG   CD   CE   NZ                                   
REMARK 470     LYS L 107    CG   CD   CE   NZ                                   
REMARK 470     ARG L 108    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ARG L 142    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     GLU L 143    CG   CD   OE1  OE2                                  
REMARK 470     LYS L 169    CG   CD   CE   NZ                                   
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   O    GLY H    33     H    THR H    98              1.57            
REMARK 500   O    LEU H   171     H    SER H   173              1.57            
REMARK 500   O    THR A    37     H    LYS A    95              1.60            
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    LYS A  30       73.88     60.22                                   
REMARK 500    ALA A  42     -154.22    -89.24                                   
REMARK 500    ASP A  43       86.21    -65.72                                   
REMARK 500    ASN A  58     -167.14   -160.73                                   
REMARK 500    SER A  73       76.86   -167.38                                   
REMARK 500    ASN A  75       51.93   -114.45                                   
REMARK 500    MET A  99      -61.18    -90.58                                   
REMARK 500    SER H  28      165.13     64.73                                   
REMARK 500    THR H  30      146.88   -170.69                                   
REMARK 500    ILE H  48      -66.05   -105.35                                   
REMARK 500    SER H  84       71.76     38.05                                   
REMARK 500    TYR H 109       61.58     37.38                                   
REMARK 500    LYS H 141      118.75   -168.07                                   
REMARK 500    SER H 142      -64.05    -90.57                                   
REMARK 500    ASP H 156       79.69     61.36                                   
REMARK 500    THR H 172      -46.45     56.68                                   
REMARK 500    LEU H 201      -61.80   -122.92                                   
REMARK 500    LYS H 226       52.95    -95.74                                   
REMARK 500    LEU L  47      -60.76    -98.50                                   
REMARK 500    ALA L  51      -52.54     75.94                                   
REMARK 500    SER L  77       83.66     68.39                                   
REMARK 500    LYS L 107       82.45     68.82                                   
REMARK 500    ASN L 138       87.44     61.71                                   
REMARK 500    GLU L 143      105.13    -54.12                                   
REMARK 500    SER L 156      -70.52   -109.55                                   
REMARK 500    LYS L 190      -66.70   -103.54                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
DBREF  6XY2 A    3   125  UNP    P16410   CTLA4_HUMAN     38    160             
DBREF  6XY2 H    1   247  PDB    6XY2     6XY2             1    247             
DBREF  6XY2 L    1   214  PDB    6XY2     6XY2             1    214             
SEQRES   1 A  123  MET HIS VAL ALA GLN PRO ALA VAL VAL LEU ALA SER SER          
SEQRES   2 A  123  ARG GLY ILE ALA SER PHE VAL CYS GLU TYR ALA SER PRO          
SEQRES   3 A  123  GLY LYS ALA THR GLU VAL ARG VAL THR VAL LEU ARG GLN          
SEQRES   4 A  123  ALA ASP SER GLN VAL THR GLU VAL CYS ALA ALA THR TYR          
SEQRES   5 A  123  MET MET GLY ASN GLU LEU THR PHE LEU ASP ASP SER ILE          
SEQRES   6 A  123  CYS THR GLY THR SER SER GLY ASN GLN VAL ASN LEU THR          
SEQRES   7 A  123  ILE GLN GLY LEU ARG ALA MET ASP THR GLY LEU TYR ILE          
SEQRES   8 A  123  CYS LYS VAL GLU LEU MET TYR PRO PRO PRO TYR TYR LEU          
SEQRES   9 A  123  GLY ILE GLY ASN GLY THR GLN ILE TYR VAL ILE ASP PRO          
SEQRES  10 A  123  GLU PRO CYS PRO ASP SER                                      
SEQRES   1 H  247  GLN VAL GLN LEU GLN GLU SER GLY PRO GLY LEU VAL LYS          
SEQRES   2 H  247  PRO SER GLU THR LEU SER LEU THR CYS THR VAL SER GLY          
SEQRES   3 H  247  PHE SER LEU THR SER TYR GLY LEU SER TRP ILE ARG GLN          
SEQRES   4 H  247  PRO PRO GLY LYS GLY LEU GLU TRP ILE GLY TYR ILE TRP          
SEQRES   5 H  247  TYR ASP GLY ASN THR ASN PHE HIS SER PRO LEU LYS SER          
SEQRES   6 H  247  ARG VAL THR ILE SER VAL ASP THR SER LYS ASN GLN PHE          
SEQRES   7 H  247  SER LEU LYS LEU SER SER VAL THR ALA ALA ASP THR ALA          
SEQRES   8 H  247  VAL TYR TYR CYS ALA LYS THR GLU GLY HIS TYR TYR GLY          
SEQRES   9 H  247  SER ASN TYR GLY TYR TYR ALA LEU ASP TYR TRP GLY GLN          
SEQRES  10 H  247  GLY THR LEU VAL THR VAL SER SER ALA SER THR LYS GLY          
SEQRES  11 H  247  PRO SER VAL PHE PRO LEU ALA PRO SER SER LYS SER THR          
SEQRES  12 H  247  SER GLY GLY THR ALA ALA LEU GLY CYS LEU VAL LYS ASP          
SEQRES  13 H  247  TYR PHE PRO GLU PRO VAL THR VAL SER TRP ASN SER GLY          
SEQRES  14 H  247  ALA LEU THR SER GLY VAL HIS THR PHE PRO ALA VAL LEU          
SEQRES  15 H  247  GLN SER SER GLY LEU TYR SER LEU SER SER VAL VAL THR          
SEQRES  16 H  247  VAL PRO SER SER SER LEU GLY THR GLN THR TYR ILE CYS          
SEQRES  17 H  247  ASN VAL ASN HIS LYS PRO SER ASN THR LYS VAL ASP LYS          
SEQRES  18 H  247  ARG VAL GLU PRO LYS SER CYS ASP LYS THR HIS THR MET          
SEQRES  19 H  247  ASP PRO GLY GLY SER HIS HIS HIS HIS HIS HIS HIS HIS          
SEQRES   1 L  214  ASP ILE GLN MET THR GLN SER PRO SER SER LEU SER ALA          
SEQRES   2 L  214  SER VAL GLY ASP ARG VAL THR ILE THR CYS ARG ALA SER          
SEQRES   3 L  214  GLU ASN ILE TYR SER ASN LEU ALA TRP TYR GLN GLN LYS          
SEQRES   4 L  214  GLN GLY LYS ALA PRO LYS LEU LEU LEU TYR ALA ALA THR          
SEQRES   5 L  214  ASN LEU GLN ASP GLY VAL PRO SER ARG PHE SER GLY SER          
SEQRES   6 L  214  GLY SER GLY THR ASP TYR THR LEU THR ILE SER SER LEU          
SEQRES   7 L  214  GLN PRO GLU ASP PHE ALA THR TYR PHE CYS GLN HIS LEU          
SEQRES   8 L  214  TRP GLY THR PRO TYR THR PHE GLY GLN GLY THR LYS LEU          
SEQRES   9 L  214  GLU ILE LYS ARG THR VAL ALA ALA PRO SER VAL PHE ILE          
SEQRES  10 L  214  PHE PRO PRO SER ASP GLU GLN LEU LYS SER GLY THR ALA          
SEQRES  11 L  214  SER VAL VAL CYS LEU LEU ASN ASN PHE TYR PRO ARG GLU          
SEQRES  12 L  214  ALA LYS VAL GLN TRP LYS VAL ASP ASN ALA LEU GLN SER          
SEQRES  13 L  214  GLY ASN SER GLN GLU SER VAL THR GLU GLN ASP SER LYS          
SEQRES  14 L  214  ASP SER THR TYR SER LEU SER SER THR LEU THR LEU SER          
SEQRES  15 L  214  LYS ALA ASP TYR GLU LYS HIS LYS VAL TYR ALA CYS GLU          
SEQRES  16 L  214  VAL THR HIS GLN GLY LEU SER SER PRO VAL THR LYS SER          
SEQRES  17 L  214  PHE ASN ARG GLY GLU CYS                                      
HET    NAG  A 201      28                                                       
HETNAM     NAG 2-ACETAMIDO-2-DEOXY-BETA-D-GLUCOPYRANOSE                         
HETSYN     NAG N-ACETYL-BETA-D-GLUCOSAMINE; 2-ACETAMIDO-2-DEOXY-BETA-           
HETSYN   2 NAG  D-GLUCOSE; 2-ACETAMIDO-2-DEOXY-D-GLUCOSE; 2-ACETAMIDO-          
HETSYN   3 NAG  2-DEOXY-GLUCOSE; N-ACETYL-D-GLUCOSAMINE                         
FORMUL   4  NAG    C8 H15 N O6                                                  
HELIX    1 AA1 ARG A   85  THR A   89  5                                   5    
HELIX    2 AA2 THR H   86  THR H   90  5                                   5    
HELIX    3 AA3 GLN L   79  PHE L   83  5                                   5    
HELIX    4 AA4 SER L  121  SER L  127  1                                   7    
HELIX    5 AA5 LYS L  183  GLU L  187  1                                   5    
SHEET    1 AA1 4 VAL A   5  ALA A   6  0                                        
SHEET    2 AA1 4 ILE A  18  TYR A  25 -1  O  GLU A  24   N  ALA A   6           
SHEET    3 AA1 4 GLN A  76  GLN A  82 -1  O  LEU A  79   N  PHE A  21           
SHEET    4 AA1 4 CYS A  68  THR A  69 -1  N  THR A  69   O  THR A  80           
SHEET    1 AA2 6 VAL A  10  LEU A  12  0                                        
SHEET    2 AA2 6 THR A 112  TYR A 115  1  O  TYR A 115   N  VAL A  11           
SHEET    3 AA2 6 GLY A  90  TYR A 100 -1  N  TYR A  92   O  THR A 112           
SHEET    4 AA2 6 GLU A  33  ALA A  42 -1  N  THR A  37   O  LYS A  95           
SHEET    5 AA2 6 GLN A  45  MET A  55 -1  O  ALA A  52   N  VAL A  36           
SHEET    6 AA2 6 LEU A  60  PHE A  62 -1  O  THR A  61   N  THR A  53           
SHEET    1 AA3 4 VAL A  10  LEU A  12  0                                        
SHEET    2 AA3 4 THR A 112  TYR A 115  1  O  TYR A 115   N  VAL A  11           
SHEET    3 AA3 4 GLY A  90  TYR A 100 -1  N  TYR A  92   O  THR A 112           
SHEET    4 AA3 4 TYR A 105  ILE A 108 -1  O  GLY A 107   N  VAL A  96           
SHEET    1 AA4 4 GLN H   3  SER H   7  0                                        
SHEET    2 AA4 4 THR H  21  SER H  25 -1  O  THR H  23   N  GLN H   5           
SHEET    3 AA4 4 GLN H  77  SER H  79 -1  O  PHE H  78   N  CYS H  22           
SHEET    4 AA4 4 SER H  70  ASP H  72 -1  N  ASP H  72   O  GLN H  77           
SHEET    1 AA5 5 LEU H  11  VAL H  12  0                                        
SHEET    2 AA5 5 THR H 119  VAL H 123  1  O  THR H 122   N  VAL H  12           
SHEET    3 AA5 5 ALA H  91  TYR H 103 -1  N  TYR H  93   O  THR H 119           
SHEET    4 AA5 5 GLY H  33  GLN H  39 -1  N  GLY H  33   O  THR H  98           
SHEET    5 AA5 5 GLU H  46  TRP H  52 -1  O  ILE H  51   N  LEU H  34           
SHEET    1 AA6 4 LEU H  11  VAL H  12  0                                        
SHEET    2 AA6 4 THR H 119  VAL H 123  1  O  THR H 122   N  VAL H  12           
SHEET    3 AA6 4 ALA H  91  TYR H 103 -1  N  TYR H  93   O  THR H 119           
SHEET    4 AA6 4 ASN H 106  TRP H 115 -1  O  TYR H 114   N  LYS H  97           
SHEET    1 AA7 2 LEU H  18  SER H  19  0                                        
SHEET    2 AA7 2 LYS H  81  LEU H  82 -1  O  LEU H  82   N  LEU H  18           
SHEET    1 AA8 4 SER H 132  LEU H 136  0                                        
SHEET    2 AA8 4 ALA H 148  TYR H 157 -1  O  LYS H 155   N  SER H 132           
SHEET    3 AA8 4 TYR H 188  VAL H 196 -1  O  TYR H 188   N  TYR H 157           
SHEET    4 AA8 4 VAL H 175  THR H 177 -1  N  HIS H 176   O  VAL H 193           
SHEET    1 AA9 4 SER H 132  LEU H 136  0                                        
SHEET    2 AA9 4 ALA H 148  TYR H 157 -1  O  LYS H 155   N  SER H 132           
SHEET    3 AA9 4 TYR H 188  VAL H 196 -1  O  TYR H 188   N  TYR H 157           
SHEET    4 AA9 4 VAL H 181  LEU H 182 -1  N  VAL H 181   O  SER H 189           
SHEET    1 AB1 3 THR H 163  TRP H 166  0                                        
SHEET    2 AB1 3 ILE H 207  HIS H 212 -1  O  ASN H 209   N  SER H 165           
SHEET    3 AB1 3 THR H 217  ARG H 222 -1  O  THR H 217   N  HIS H 212           
SHEET    1 AB2 4 MET L   4  SER L   7  0                                        
SHEET    2 AB2 4 THR L  22  ALA L  25 -1  O  ARG L  24   N  THR L   5           
SHEET    3 AB2 4 ASP L  70  ILE L  75 -1  O  TYR L  71   N  CYS L  23           
SHEET    4 AB2 4 PHE L  62  SER L  67 -1  N  SER L  65   O  THR L  72           
SHEET    1 AB3 6 SER L  10  SER L  12  0                                        
SHEET    2 AB3 6 THR L 102  GLU L 105  1  O  LYS L 103   N  LEU L  11           
SHEET    3 AB3 6 THR L  85  HIS L  90 -1  N  TYR L  86   O  THR L 102           
SHEET    4 AB3 6 LEU L  33  GLN L  38 -1  N  ALA L  34   O  GLN L  89           
SHEET    5 AB3 6 LYS L  45  TYR L  49 -1  O  LYS L  45   N  GLN L  37           
SHEET    6 AB3 6 ASN L  53  LEU L  54 -1  O  ASN L  53   N  TYR L  49           
SHEET    1 AB4 4 SER L 114  PHE L 118  0                                        
SHEET    2 AB4 4 THR L 129  PHE L 139 -1  O  LEU L 135   N  PHE L 116           
SHEET    3 AB4 4 TYR L 173  SER L 182 -1  O  LEU L 179   N  VAL L 132           
SHEET    4 AB4 4 SER L 159  GLN L 160 -1  N  GLN L 160   O  THR L 178           
SHEET    1 AB5 4 SER L 114  PHE L 118  0                                        
SHEET    2 AB5 4 THR L 129  PHE L 139 -1  O  LEU L 135   N  PHE L 116           
SHEET    3 AB5 4 TYR L 173  SER L 182 -1  O  LEU L 179   N  VAL L 132           
SHEET    4 AB5 4 VAL L 163  THR L 164 -1  N  THR L 164   O  SER L 174           
SHEET    1 AB6 4 LEU L 154  GLN L 155  0                                        
SHEET    2 AB6 4 LYS L 145  VAL L 150 -1  N  TRP L 148   O  GLN L 155           
SHEET    3 AB6 4 VAL L 191  THR L 197 -1  O  GLU L 195   N  GLN L 147           
SHEET    4 AB6 4 VAL L 205  ASN L 210 -1  O  VAL L 205   N  VAL L 196           
SSBOND   1 CYS A   23    CYS A   94                          1555   1555  2.04  
SSBOND   2 CYS A   50    CYS A   68                          1555   1555  2.04  
SSBOND   3 CYS H   22    CYS H   95                          1555   1555  2.04  
SSBOND   4 CYS H  152    CYS H  208                          1555   1555  2.04  
SSBOND   5 CYS L   23    CYS L   88                          1555   1555  2.04  
SSBOND   6 CYS L  134    CYS L  194                          1555   1555  2.04  
LINK         ND2 ASN A  78                 C1  NAG A 201     1555   1555  1.53  
CISPEP   1 TYR A  100    PRO A  101          0        -1.84                     
CISPEP   2 PRO A  102    PRO A  103          0         2.39                     
CISPEP   3 PHE H  158    PRO H  159          0        -4.34                     
CISPEP   4 GLU H  160    PRO H  161          0        -3.29                     
CISPEP   5 SER L    7    PRO L    8          0        -3.71                     
CISPEP   6 TYR L  140    PRO L  141          0         0.57                     
CRYST1  163.862  254.478   66.935  90.00  90.00  90.00 C 2 2 21      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      0.006103  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.003930  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.014940        0.00000