HEADER    IMMUNE SYSTEM                           01-APR-11   3RDT              
TITLE     CRYSTAL STRUCTURE OF 809.B5 TCR COMPLEXED WITH MHC CLASS II I-AB/3K   
TITLE    2 PEPTIDE                                                              
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: H-2 CLASS II HISTOCOMPATIBILITY ANTIGEN, A-B ALPHA CHAIN;  
COMPND   3 CHAIN: C;                                                            
COMPND   4 FRAGMENT: UNP RESIDUES 27-208;                                       
COMPND   5 SYNONYM: IAALPHA;                                                    
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MOL_ID: 2;                                                           
COMPND   8 MOLECULE: 3K PEPTIDE, LINKER AND MHC H-2 CLASS II I-AB BETA CHAIN;   
COMPND   9 CHAIN: D;                                                            
COMPND  10 ENGINEERED: YES;                                                     
COMPND  11 MOL_ID: 3;                                                           
COMPND  12 MOLECULE: TCR 809.B5 ALPHA CHAIN;                                    
COMPND  13 CHAIN: A;                                                            
COMPND  14 ENGINEERED: YES;                                                     
COMPND  15 MOL_ID: 4;                                                           
COMPND  16 MOLECULE: TCR 809.B5 BETA CHAIN;                                     
COMPND  17 CHAIN: B;                                                            
COMPND  18 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: MUS MUSCULUS;                                   
SOURCE   3 ORGANISM_COMMON: MOUSE;                                              
SOURCE   4 ORGANISM_TAXID: 10090;                                               
SOURCE   5 GENE: H2-AA;                                                         
SOURCE   6 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA;                            
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 7108;                                       
SOURCE   8 MOL_ID: 2;                                                           
SOURCE   9 ORGANISM_SCIENTIFIC: SYNTHETIC CONSTRUCT, MUS MUSCULUS;              
SOURCE  10 ORGANISM_COMMON: MOUSE, ARTIFICIAL GENE;                             
SOURCE  11 ORGANISM_TAXID: 32630, 10090;                                        
SOURCE  12 GENE: H2-AB1;                                                        
SOURCE  13 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA;                            
SOURCE  14 EXPRESSION_SYSTEM_TAXID: 7108;                                       
SOURCE  15 MOL_ID: 3;                                                           
SOURCE  16 ORGANISM_SCIENTIFIC: MUS MUSCULUS;                                   
SOURCE  17 ORGANISM_COMMON: MOUSE;                                              
SOURCE  18 ORGANISM_TAXID: 10090;                                               
SOURCE  19 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE  20 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE  21 MOL_ID: 4;                                                           
SOURCE  22 ORGANISM_SCIENTIFIC: MUS MUSCULUS;                                   
SOURCE  23 ORGANISM_COMMON: MOUSE;                                              
SOURCE  24 ORGANISM_TAXID: 10090;                                               
SOURCE  25 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE  26 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    MHC, TCR, IMMUNE RECEPTOR, IG-LIKE DOMAIN, IMMUNE SYSTEM              
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    P.TRENH,E.S.HUSEBY,L.J.STERN                                          
REVDAT   5   30-OCT-24 3RDT    1       REMARK                                   
REVDAT   4   13-SEP-23 3RDT    1       DBREF  SEQADV                            
REVDAT   3   23-AUG-17 3RDT    1       SOURCE REMARK                            
REVDAT   2   08-FEB-12 3RDT    1       JRNL                                     
REVDAT   1   07-DEC-11 3RDT    0                                                
JRNL        AUTH   B.D.STADINSKI,P.TRENH,R.L.SMITH,B.BAUTISTA,P.G.HUSEBY,G.LI,  
JRNL        AUTH 2 L.J.STERN,E.S.HUSEBY                                         
JRNL        TITL   A ROLE FOR DIFFERENTIAL VARIABLE GENE PAIRING IN CREATING T  
JRNL        TITL 2 CELL RECEPTORS SPECIFIC FOR UNIQUE MAJOR HISTOCOMPATIBILITY  
JRNL        TITL 3 LIGANDS.                                                     
JRNL        REF    IMMUNITY                      V.  35   694 2011              
JRNL        REFN                   ISSN 1074-7613                               
JRNL        PMID   22101158                                                     
JRNL        DOI    10.1016/J.IMMUNI.2011.10.012                                 
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.70 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : PHENIX (PHENIX.REFINE: 1.6.4_486)                    
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 : ML                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.70                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.00                          
REMARK   3   MIN(FOBS/SIGMA_FOBS)              : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 98.4                           
REMARK   3   NUMBER OF REFLECTIONS             : 30618                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.208                           
REMARK   3   R VALUE            (WORKING SET) : 0.206                           
REMARK   3   FREE R VALUE                     : 0.241                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1530                            
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 29.9814 -  5.8227    0.99     2994   178  0.2150 0.2291        
REMARK   3     2  5.8227 -  4.6272    0.99     2920   186  0.1837 0.2015        
REMARK   3     3  4.6272 -  4.0438    0.99     2921   162  0.1698 0.2237        
REMARK   3     4  4.0438 -  3.6748    0.99     2945   139  0.1968 0.2496        
REMARK   3     5  3.6748 -  3.4118    0.99     2918   146  0.1935 0.2254        
REMARK   3     6  3.4118 -  3.2109    0.99     2913   143  0.2079 0.2704        
REMARK   3     7  3.2109 -  3.0503    0.98     2890   146  0.2317 0.2864        
REMARK   3     8  3.0503 -  2.9176    0.98     2897   149  0.2455 0.2651        
REMARK   3     9  2.9176 -  2.8054    0.98     2878   131  0.2551 0.3101        
REMARK   3    10  2.8054 -  2.7000    0.96     2812   150  0.3002 0.3595        
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED        : FLAT BULK SOLVENT MODEL                       
REMARK   3   SOLVENT RADIUS     : 1.10                                          
REMARK   3   SHRINKAGE RADIUS   : 0.83                                          
REMARK   3   K_SOL              : 0.36                                          
REMARK   3   B_SOL              : 37.85                                         
REMARK   3                                                                      
REMARK   3  ERROR ESTIMATES.                                                    
REMARK   3   COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED)     : 0.410            
REMARK   3   PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : NULL             
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 45.74                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 52.00                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -6.23050                                             
REMARK   3    B22 (A**2) : 21.99250                                             
REMARK   3    B33 (A**2) : -15.76200                                            
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 4.03730                                              
REMARK   3    B23 (A**2) : 0.00000                                              
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      :  0.008           6583                                  
REMARK   3   ANGLE     :  1.102           8971                                  
REMARK   3   CHIRALITY :  0.078            974                                  
REMARK   3   PLANARITY :  0.004           1175                                  
REMARK   3   DIHEDRAL  : 15.074           2309                                  
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
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 3RDT COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 21-APR-11.                  
REMARK 100 THE DEPOSITION ID IS D_1000064807.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 20-OCT-10                          
REMARK 200  TEMPERATURE           (KELVIN) : NULL                               
REMARK 200  PH                             : 5.0                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : NSLS                               
REMARK 200  BEAMLINE                       : X25                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.1                                
REMARK 200  MONOCHROMATOR                  : SILICON                            
REMARK 200  OPTICS                         : MONOCHROMATOR, MIRROR              
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 315                   
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : HKL-2000                           
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 30664                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.700                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.7                               
REMARK 200  DATA REDUNDANCY                : 4.000                              
REMARK 200  R MERGE                    (I) : 0.08400                            
REMARK 200  R SYM                      (I) : 0.08400                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 18.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.70                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.75                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 97.6                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 4.00                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.54000                            
REMARK 200  R SYM FOR SHELL            (I) : 0.54000                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.770                              
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: PDB ENTRY 3C60                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 59.10                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.01                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 12% PEG 4000, 100MM SODIUM CITRATE,      
REMARK 280  100MM SODIUM CACODYLATE, PH 5.0, VAPOR DIFFUSION, HANGING DROP,     
REMARK 280  TEMPERATURE 298K                                                    
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1                          
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      119.92750            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       36.50800            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000      119.92750            
REMARK 290   SMTRY2   4  0.000000  1.000000  0.000000       36.50800            
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 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 APPLY THE FOLLOWING TO CHAINS: C, D, 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 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 C   179                                                      
REMARK 465     PRO C   180                                                      
REMARK 465     GLU C   181                                                      
REMARK 465     GLY D   -12                                                      
REMARK 465     GLY D   -11                                                      
REMARK 465     GLY D   -10                                                      
REMARK 465     GLY D    -9                                                      
REMARK 465     SER D    -8                                                      
REMARK 465     LEU D    -7                                                      
REMARK 465     VAL D    -6                                                      
REMARK 465     PRO D    -5                                                      
REMARK 465     ARG D    -4                                                      
REMARK 465     GLY D    -3                                                      
REMARK 465     SER D    -2                                                      
REMARK 465     GLY D    -1                                                      
REMARK 465     GLY D     0                                                      
REMARK 465     GLY D     1                                                      
REMARK 465     GLY D     2                                                      
REMARK 465     SER D     3                                                      
REMARK 465     GLU D     4                                                      
REMARK 465     ARG D     5                                                      
REMARK 465     MET A     0                                                      
REMARK 465     GLN A     1                                                      
REMARK 465     PRO A   202                                                      
REMARK 465     GLU A   203                                                      
REMARK 465     SER A   204                                                      
REMARK 465     SER A   205                                                      
REMARK 465     MET B     0                                                      
REMARK 465     ALA B   239                                                      
REMARK 465     ASP B   240                                                      
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 C  75    CG   CD   CE   NZ                                   
REMARK 470     ASN C 124    CG   OD1  ND2                                       
REMARK 470     LYS C 126    CG   CD   CE   NZ                                   
REMARK 470     ARG C 141    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ILE C 160    CG1  CG2  CD1                                       
REMARK 470     LYS C 176    CG   CD   CE   NZ                                   
REMARK 470     GLN D  22    CG   CD   OE1  NE2                                  
REMARK 470     ARG D  23    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ARG D  55    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     GLU D  59    CG   CD   OE1  OE2                                  
REMARK 470     ARG D 190    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     GLN A   2    CG   CD   OE1  NE2                                  
REMARK 470     ARG A   4    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     GLN A   8    CG   CD   OE1  NE2                                  
REMARK 470     GLU A  25    CG   CD   OE1  OE2                                  
REMARK 470     LYS A  68    CG   CD   CE   NZ                                   
REMARK 470     ARG A  69    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     LYS A  72    CG   CD   CE   NZ                                   
REMARK 470     ARG A 124    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ASP A 130    CG   OD1  OD2                                       
REMARK 470     GLN A 142    CG   CD   OE1  NE2                                  
REMARK 470     ASN A 144    CG   OD1  ND2                                       
REMARK 470     GLN A 147    CG   CD   OE1  NE2                                  
REMARK 470     LYS A 149    CG   CD   CE   NZ                                   
REMARK 470     ARG A 164    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     VAL B  12    CG1  CG2                                            
REMARK 470     ASN B  22    CG   OD1  ND2                                       
REMARK 470     LYS B  63    CG   CD   CE   NZ                                   
REMARK 470     GLU B 111    CG   CD   OE1  OE2                                  
REMARK 470     ASP B 112    CG   OD1  OD2                                       
REMARK 470     GLU B 152    CG   CD   OE1  OE2                                  
REMARK 470     LYS B 160    CG   CD   CE   NZ                                   
REMARK 470     ARG B 201    CG   CD   NE   CZ   NH1  NH2                        
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    SER C 125       -1.31     75.18                                   
REMARK 500    ALA C 129       17.99   -143.00                                   
REMARK 500    SER D  42      -14.61    -48.26                                   
REMARK 500    VAL D  78      -68.50    -99.75                                   
REMARK 500    THR D  90     -101.69   -132.28                                   
REMARK 500    PRO D 125     -161.29    -75.04                                   
REMARK 500    ASP A  59       83.64   -156.88                                   
REMARK 500    LYS A  71       50.06     39.88                                   
REMARK 500    ALA A  86     -173.03    177.71                                   
REMARK 500    ASP A 117       69.35   -158.56                                   
REMARK 500    SER A 129      -29.66    -36.17                                   
REMARK 500    ASP A 152      -38.77     85.72                                   
REMARK 500    ASP A 167       60.09   -119.75                                   
REMARK 500    ASP A 181       50.89   -100.53                                   
REMARK 500    HIS B  39      -10.79   -153.45                                   
REMARK 500    LEU B 113      -12.09     61.01                                   
REMARK 500    GLN B 135       19.04     59.29                                   
REMARK 500    PRO B 148     -166.44    -72.52                                   
REMARK 500    ASP B 149       38.05    -95.21                                   
REMARK 500    HIS B 163      -37.78   -131.58                                   
REMARK 500    GLN B 176       76.63   -155.96                                   
REMARK 500    ASN B 180        2.40    -69.81                                   
REMARK 500    PHE B 196      -29.93   -147.42                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 3C60   RELATED DB: PDB                                   
REMARK 900 THE SAME MHC PROTEIN WITH A DIFFERENT TCR ALPHA CHAIN. CRYSTAL       
REMARK 900 STRUCTURE OF MOUSE MHC CLASS II I-AB/3K PEPTIDE COMPLEXED WITH       
REMARK 900 MOUSE TCR YAE62                                                      
REMARK 900 RELATED ID: 3C6L   RELATED DB: PDB                                   
REMARK 900 THE SAME MHC PROTEIN WITH A DIFFERENT TCR. CRYSTAL STRUCTURE OF      
REMARK 900 MOUSE MHC CLASS II I-AB/3K PEPTIDE COMPLEXED WITH MOUSE TCR 2W20     
REMARK 900 RELATED ID: 3C5Z   RELATED DB: PDB                                   
REMARK 900 THE SAME MHC PROTEIN WITH A DIFFERENT TCR. CRYSTAL STRUCTURE OF      
REMARK 900 MOUSE MHC CLASS II I-AB/3K PEPTIDE COMPLEXED WITH MOUSE TCR B3K506   
REMARK 900 RELATED ID: 1LNU   RELATED DB: PDB                                   
REMARK 900 THE SAME MHC PROTEIN. CRYSTAL STRUCTURE OF CLASS II MHC MOLECULE     
REMARK 900 IAB BOUND TO EALPHA3K PEPTIDE                                        
DBREF  3RDT C    0   181  UNP    P14434   HA2B_MOUSE      27    208             
DBREF  3RDT D    3   191  UNP    P14483   HB2A_MOUSE      30    218             
DBREF  3RDT D  -25   -13  PDB    3RDT     3RDT           -25    -13             
DBREF  3RDT A    1   205  PDB    3RDT     3RDT             1    205             
DBREF  3RDT B    0   240  PDB    3RDT     3RDT             0    240             
SEQADV 3RDT GLY D  -12  UNP  P14483              LINKER                         
SEQADV 3RDT GLY D  -11  UNP  P14483              LINKER                         
SEQADV 3RDT GLY D  -10  UNP  P14483              LINKER                         
SEQADV 3RDT GLY D   -9  UNP  P14483              LINKER                         
SEQADV 3RDT SER D   -8  UNP  P14483              LINKER                         
SEQADV 3RDT LEU D   -7  UNP  P14483              LINKER                         
SEQADV 3RDT VAL D   -6  UNP  P14483              LINKER                         
SEQADV 3RDT PRO D   -5  UNP  P14483              LINKER                         
SEQADV 3RDT ARG D   -4  UNP  P14483              LINKER                         
SEQADV 3RDT GLY D   -3  UNP  P14483              LINKER                         
SEQADV 3RDT SER D   -2  UNP  P14483              LINKER                         
SEQADV 3RDT GLY D   -1  UNP  P14483              LINKER                         
SEQADV 3RDT GLY D    0  UNP  P14483              LINKER                         
SEQADV 3RDT GLY D    1  UNP  P14483              LINKER                         
SEQADV 3RDT GLY D    2  UNP  P14483              LINKER                         
SEQRES   1 C  182  ILE GLU ALA ASP HIS VAL GLY THR TYR GLY ILE SER VAL          
SEQRES   2 C  182  TYR GLN SER PRO GLY ASP ILE GLY GLN TYR THR PHE GLU          
SEQRES   3 C  182  PHE ASP GLY ASP GLU LEU PHE TYR VAL ASP LEU ASP LYS          
SEQRES   4 C  182  LYS GLU THR VAL TRP MET LEU PRO GLU PHE GLY GLN LEU          
SEQRES   5 C  182  ALA SER PHE ASP PRO GLN GLY GLY LEU GLN ASN ILE ALA          
SEQRES   6 C  182  VAL VAL LYS HIS ASN LEU GLY VAL LEU THR LYS ARG SER          
SEQRES   7 C  182  ASN SER THR PRO ALA THR ASN GLU ALA PRO GLN ALA THR          
SEQRES   8 C  182  VAL PHE PRO LYS SER PRO VAL LEU LEU GLY GLN PRO ASN          
SEQRES   9 C  182  THR LEU ILE CYS PHE VAL ASP ASN ILE PHE PRO PRO VAL          
SEQRES  10 C  182  ILE ASN ILE THR TRP LEU ARG ASN SER LYS SER VAL ALA          
SEQRES  11 C  182  ASP GLY VAL TYR GLU THR SER PHE PHE VAL ASN ARG ASP          
SEQRES  12 C  182  TYR SER PHE HIS LYS LEU SER TYR LEU THR PHE ILE PRO          
SEQRES  13 C  182  SER ASP ASP ASP ILE TYR ASP CYS LYS VAL GLU HIS TRP          
SEQRES  14 C  182  GLY LEU GLU GLU PRO VAL LEU LYS HIS TRP GLU PRO GLU          
SEQRES   1 D  217  PHE GLU ALA GLN LYS ALA LYS ALA ASN LYS ALA VAL ASP          
SEQRES   2 D  217  GLY GLY GLY GLY SER LEU VAL PRO ARG GLY SER GLY GLY          
SEQRES   3 D  217  GLY GLY SER GLU ARG HIS PHE VAL TYR GLN PHE MET GLY          
SEQRES   4 D  217  GLU CYS TYR PHE THR ASN GLY THR GLN ARG ILE ARG TYR          
SEQRES   5 D  217  VAL THR ARG TYR ILE TYR ASN ARG GLU GLU TYR VAL ARG          
SEQRES   6 D  217  TYR ASP SER ASP VAL GLY GLU HIS ARG ALA VAL THR GLU          
SEQRES   7 D  217  LEU GLY ARG PRO ASP ALA GLU TYR TRP ASN SER GLN PRO          
SEQRES   8 D  217  GLU ILE LEU GLU ARG THR ARG ALA GLU LEU ASP THR VAL          
SEQRES   9 D  217  CYS ARG HIS ASN TYR GLU GLY PRO GLU THR HIS THR SER          
SEQRES  10 D  217  LEU ARG ARG LEU GLU GLN PRO ASN VAL VAL ILE SER LEU          
SEQRES  11 D  217  SER ARG THR GLU ALA LEU ASN HIS HIS ASN THR LEU VAL          
SEQRES  12 D  217  CYS SER VAL THR ASP PHE TYR PRO ALA LYS ILE LYS VAL          
SEQRES  13 D  217  ARG TRP PHE ARG ASN GLY GLN GLU GLU THR VAL GLY VAL          
SEQRES  14 D  217  SER SER THR GLN LEU ILE ARG ASN GLY ASP TRP THR PHE          
SEQRES  15 D  217  GLN VAL LEU VAL MET LEU GLU MET THR PRO ARG ARG GLY          
SEQRES  16 D  217  GLU VAL TYR THR CYS HIS VAL GLU HIS PRO SER LEU LYS          
SEQRES  17 D  217  SER PRO ILE THR VAL GLU TRP ARG ALA                          
SEQRES   1 A  205  MET GLN GLN VAL ARG GLN SER PRO GLN SER LEU THR VAL          
SEQRES   2 A  205  TRP GLU GLY GLU THR ALA ILE LEU ASN CYS SER TYR GLU          
SEQRES   3 A  205  ASN SER ALA PHE ASP TYR PHE PRO TRP TYR GLN GLN PHE          
SEQRES   4 A  205  PRO GLY GLU GLY PRO ALA LEU LEU ILE ALA ILE ARG SER          
SEQRES   5 A  205  VAL SER ASP LYS LYS GLU ASP GLY ARG PHE THR ILE PHE          
SEQRES   6 A  205  PHE ASN LYS ARG GLU LYS LYS LEU SER LEU HIS ILE THR          
SEQRES   7 A  205  ASP SER GLN PRO GLY ASP SER ALA THR TYR PHE CYS ALA          
SEQRES   8 A  205  ALA SER LYS GLY ALA ASP ARG LEU THR PHE GLY LYS GLY          
SEQRES   9 A  205  THR GLN LEU ILE ILE GLN PRO TYR ILE GLN ASN PRO ASP          
SEQRES  10 A  205  PRO ALA VAL TYR GLN LEU ARG ASP SER LYS SER SER ASP          
SEQRES  11 A  205  LYS SER VAL CYS LEU PHE THR ASP PHE ASP SER GLN THR          
SEQRES  12 A  205  ASN VAL SER GLN SER LYS ASP SER ASP VAL TYR ILE THR          
SEQRES  13 A  205  ASP LYS CYS VAL LEU ASP MET ARG SER MET ASP PHE LYS          
SEQRES  14 A  205  SER ASN SER ALA VAL ALA TRP SER ASN LYS SER ASP PHE          
SEQRES  15 A  205  ALA CYS ALA ASN ALA PHE ASN ASN SER ILE ILE PRO GLU          
SEQRES  16 A  205  ASP THR PHE PHE PRO SER PRO GLU SER SER                      
SEQRES   1 B  241  MET ALA VAL THR GLN SER PRO ARG ASN LYS VAL ALA VAL          
SEQRES   2 B  241  THR GLY GLY LYS VAL THR LEU SER CYS ASN GLN THR ASN          
SEQRES   3 B  241  ASN HIS ASN ASN MET TYR TRP TYR ARG GLN ASP THR GLY          
SEQRES   4 B  241  HIS GLY LEU ARG LEU ILE HIS TYR SER TYR GLY ALA GLY          
SEQRES   5 B  241  SER THR GLU LYS GLY ASP ILE PRO ASP GLY TYR LYS ALA          
SEQRES   6 B  241  SER ARG PRO SER GLN GLU ASN PHE SER LEU ILE LEU GLU          
SEQRES   7 B  241  LEU ALA THR PRO SER GLN THR SER VAL TYR PHE CYS ALA          
SEQRES   8 B  241  SER GLY ASP PHE TRP GLY ASP THR LEU TYR PHE GLY ALA          
SEQRES   9 B  241  GLY THR ARG LEU SER VAL LEU GLU ASP LEU LYS ASN VAL          
SEQRES  10 B  241  PHE PRO PRO GLU VAL ALA VAL PHE GLU PRO SER GLU ALA          
SEQRES  11 B  241  GLU ILE SER HIS THR GLN LYS ALA THR LEU VAL CYS LEU          
SEQRES  12 B  241  ALA THR GLY PHE TYR PRO ASP HIS VAL GLU LEU SER TRP          
SEQRES  13 B  241  TRP VAL ASN GLY LYS GLU VAL HIS SER GLY VAL CYS THR          
SEQRES  14 B  241  ASP PRO GLN PRO LEU LYS GLU GLN PRO ALA LEU ASN ASP          
SEQRES  15 B  241  SER ARG TYR ALA LEU SER SER ARG LEU ARG VAL SER ALA          
SEQRES  16 B  241  THR PHE TRP GLN ASN PRO ARG ASN HIS PHE ARG CYS GLN          
SEQRES  17 B  241  VAL GLN PHE TYR GLY LEU SER GLU ASN ASP GLU TRP THR          
SEQRES  18 B  241  GLN ASP ARG ALA LYS PRO VAL THR GLN ILE VAL SER ALA          
SEQRES  19 B  241  GLU ALA TRP GLY ARG ALA ASP                                  
HELIX    1   1 LEU C   45  GLN C   50  1                                   6    
HELIX    2   2 ASP C   55  SER C   77  1                                  23    
HELIX    3   3 THR D   51  LEU D   53  5                                   3    
HELIX    4   4 GLY D   54  GLN D   64  1                                  11    
HELIX    5   5 GLN D   64  ALA D   73  1                                  10    
HELIX    6   6 ALA D   73  VAL D   78  1                                   6    
HELIX    7   7 VAL D   78  GLY D   85  1                                   8    
HELIX    8   8 PRO D   86  ARG D   94  5                                   9    
HELIX    9   9 GLN A   81  SER A   85  5                                   5    
HELIX   10  10 THR B   80  THR B   84  5                                   5    
HELIX   11  11 SER B  127  GLN B  135  1                                   9    
HELIX   12  12 ALA B  194  GLN B  198  1                                   5    
SHEET    1   A 8 GLU C  40  TRP C  43  0                                        
SHEET    2   A 8 ASP C  29  ASP C  35 -1  N  ASP C  35   O  GLU C  40           
SHEET    3   A 8 ILE C  19  PHE C  26 -1  N  PHE C  26   O  ASP C  29           
SHEET    4   A 8 HIS C   4  SER C  15 -1  N  GLN C  14   O  ILE C  19           
SHEET    5   A 8 PHE D   7  THR D  18 -1  O  PHE D  11   N  SER C  11           
SHEET    6   A 8 ARG D  23  TYR D  32 -1  O  VAL D  27   N  GLU D  14           
SHEET    7   A 8 GLU D  35  ASP D  41 -1  O  TYR D  40   N  THR D  28           
SHEET    8   A 8 HIS D  47  ALA D  49 -1  O  ARG D  48   N  ARG D  39           
SHEET    1   B 4 GLN C  88  PRO C  93  0                                        
SHEET    2   B 4 ASN C 103  ILE C 112 -1  O  ASP C 110   N  GLN C  88           
SHEET    3   B 4 PHE C 145  PHE C 153 -1  O  LYS C 147   N  VAL C 109           
SHEET    4   B 4 TYR C 133  GLU C 134 -1  N  TYR C 133   O  TYR C 150           
SHEET    1   C 4 GLN C  88  PRO C  93  0                                        
SHEET    2   C 4 ASN C 103  ILE C 112 -1  O  ASP C 110   N  GLN C  88           
SHEET    3   C 4 PHE C 145  PHE C 153 -1  O  LYS C 147   N  VAL C 109           
SHEET    4   C 4 PHE C 138  VAL C 139 -1  N  PHE C 138   O  HIS C 146           
SHEET    1   D 4 LYS C 126  VAL C 128  0                                        
SHEET    2   D 4 ASN C 118  ARG C 123 -1  N  ARG C 123   O  LYS C 126           
SHEET    3   D 4 TYR C 161  GLU C 166 -1  O  GLU C 166   N  ASN C 118           
SHEET    4   D 4 VAL C 174  TRP C 178 -1  O  VAL C 174   N  VAL C 165           
SHEET    1   E 4 ASN D  99  LEU D 104  0                                        
SHEET    2   E 4 ASN D 114  PHE D 123 -1  O  THR D 121   N  ASN D  99           
SHEET    3   E 4 PHE D 156  MET D 164 -1  O  LEU D 162   N  LEU D 116           
SHEET    4   E 4 VAL D 143  SER D 145 -1  N  SER D 144   O  MET D 161           
SHEET    1   F 4 ASN D  99  LEU D 104  0                                        
SHEET    2   F 4 ASN D 114  PHE D 123 -1  O  THR D 121   N  ASN D  99           
SHEET    3   F 4 PHE D 156  MET D 164 -1  O  LEU D 162   N  LEU D 116           
SHEET    4   F 4 ILE D 149  ARG D 150 -1  N  ILE D 149   O  GLN D 157           
SHEET    1   G 4 GLN D 137  GLU D 138  0                                        
SHEET    2   G 4 LYS D 129  ARG D 134 -1  N  ARG D 134   O  GLN D 137           
SHEET    3   G 4 VAL D 171  GLU D 177 -1  O  HIS D 175   N  ARG D 131           
SHEET    4   G 4 ILE D 185  ARG D 190 -1  O  TRP D 189   N  TYR D 172           
SHEET    1   H 5 VAL A   3  SER A   6  0                                        
SHEET    2   H 5 ALA A  18  TYR A  24 -1  O  SER A  23   N  ARG A   4           
SHEET    3   H 5 LYS A  72  ILE A  77 -1  O  ILE A  77   N  ALA A  18           
SHEET    4   H 5 PHE A  62  ASN A  67 -1  N  THR A  63   O  HIS A  76           
SHEET    5   H 5 LYS A  56  ASP A  59 -1  N  ASP A  59   O  PHE A  62           
SHEET    1   I 5 SER A   9  TRP A  13  0                                        
SHEET    2   I 5 THR A 105  GLN A 110  1  O  GLN A 110   N  VAL A  12           
SHEET    3   I 5 ALA A  86  ALA A  92 -1  N  ALA A  86   O  LEU A 107           
SHEET    4   I 5 TYR A  31  GLN A  37 -1  N  GLN A  37   O  THR A  87           
SHEET    5   I 5 ALA A  44  ARG A  50 -1  O  ILE A  49   N  PHE A  32           
SHEET    1   J 4 SER A   9  TRP A  13  0                                        
SHEET    2   J 4 THR A 105  GLN A 110  1  O  GLN A 110   N  VAL A  12           
SHEET    3   J 4 ALA A  86  ALA A  92 -1  N  ALA A  86   O  LEU A 107           
SHEET    4   J 4 THR A 100  PHE A 101 -1  O  THR A 100   N  ALA A  92           
SHEET    1   K 8 VAL A 153  ILE A 155  0                                        
SHEET    2   K 8 PHE A 168  SER A 177 -1  O  TRP A 176   N  TYR A 154           
SHEET    3   K 8 SER A 132  THR A 137 -1  N  CYS A 134   O  ALA A 175           
SHEET    4   K 8 ALA A 119  ASP A 125 -1  N  TYR A 121   O  LEU A 135           
SHEET    5   K 8 GLU B 120  GLU B 125 -1  O  GLU B 125   N  ARG A 124           
SHEET    6   K 8 LYS B 136  PHE B 146 -1  O  LEU B 142   N  ALA B 122           
SHEET    7   K 8 TYR B 184  SER B 193 -1  O  LEU B 190   N  LEU B 139           
SHEET    8   K 8 VAL B 166  THR B 168 -1  N  CYS B 167   O  ARG B 189           
SHEET    1   L 8 CYS A 159  MET A 163  0                                        
SHEET    2   L 8 PHE A 168  SER A 177 -1  O  PHE A 168   N  MET A 163           
SHEET    3   L 8 SER A 132  THR A 137 -1  N  CYS A 134   O  ALA A 175           
SHEET    4   L 8 ALA A 119  ASP A 125 -1  N  TYR A 121   O  LEU A 135           
SHEET    5   L 8 GLU B 120  GLU B 125 -1  O  GLU B 125   N  ARG A 124           
SHEET    6   L 8 LYS B 136  PHE B 146 -1  O  LEU B 142   N  ALA B 122           
SHEET    7   L 8 TYR B 184  SER B 193 -1  O  LEU B 190   N  LEU B 139           
SHEET    8   L 8 LEU B 173  LYS B 174 -1  N  LEU B 173   O  ALA B 185           
SHEET    1   M 4 VAL B   2  SER B   5  0                                        
SHEET    2   M 4 VAL B  17  GLN B  23 -1  O  ASN B  22   N  THR B   3           
SHEET    3   M 4 SER B  73  LEU B  76 -1  O  LEU B  76   N  VAL B  17           
SHEET    4   M 4 LYS B  63  SER B  65 -1  N  LYS B  63   O  ILE B  75           
SHEET    1   N 6 ASN B   8  VAL B  12  0                                        
SHEET    2   N 6 THR B 105  LEU B 110  1  O  LEU B 110   N  ALA B  11           
SHEET    3   N 6 SER B  85  GLY B  92 -1  N  SER B  85   O  LEU B 107           
SHEET    4   N 6 ASN B  29  ASP B  36 -1  N  TYR B  33   O  PHE B  88           
SHEET    5   N 6 GLY B  40  SER B  47 -1  O  HIS B  45   N  TRP B  32           
SHEET    6   N 6 GLU B  54  LYS B  55 -1  O  GLU B  54   N  TYR B  46           
SHEET    1   O 4 ASN B   8  VAL B  12  0                                        
SHEET    2   O 4 THR B 105  LEU B 110  1  O  LEU B 110   N  ALA B  11           
SHEET    3   O 4 SER B  85  GLY B  92 -1  N  SER B  85   O  LEU B 107           
SHEET    4   O 4 TYR B 100  PHE B 101 -1  O  TYR B 100   N  SER B  91           
SHEET    1   P 4 LYS B 160  VAL B 162  0                                        
SHEET    2   P 4 VAL B 151  VAL B 157 -1  N  VAL B 157   O  LYS B 160           
SHEET    3   P 4 HIS B 203  PHE B 210 -1  O  GLN B 207   N  SER B 154           
SHEET    4   P 4 GLN B 229  TRP B 236 -1  O  ALA B 233   N  CYS B 206           
SSBOND   1 CYS C  107    CYS C  163                          1555   1555  2.03  
SSBOND   2 CYS D   15    CYS D   79                          1555   1555  2.03  
SSBOND   3 CYS D  118    CYS D  174                          1555   1555  2.02  
SSBOND   4 CYS A   22    CYS A   90                          1555   1555  2.05  
SSBOND   5 CYS A  134    CYS A  184                          1555   1555  2.05  
SSBOND   6 CYS A  159    CYS B  167                          1555   1555  2.06  
SSBOND   7 CYS B   21    CYS B   89                          1555   1555  2.04  
SSBOND   8 CYS B  141    CYS B  206                          1555   1555  2.02  
CISPEP   1 SER C   15    PRO C   16          0        -2.88                     
CISPEP   2 PHE C  113    PRO C  114          0        -2.07                     
CISPEP   3 TYR D  124    PRO D  125          0        -0.12                     
CISPEP   4 SER A    6    PRO A    7          0        -0.71                     
CISPEP   5 SER B    5    PRO B    6          0        -3.38                     
CISPEP   6 TYR B  147    PRO B  148          0         3.19                     
CRYST1  239.855   73.016   65.669  90.00  90.71  90.00 C 1 2 1       4          
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      0.004169  0.000000  0.000052        0.00000                         
SCALE2      0.000000  0.013696  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.015229        0.00000