HEADER    TRANSPORT PROTEIN                       27-FEB-06   2G7B              
TITLE     CRYSTAL STRUCTURE OF THE R132K:R111L:L121E MUTANT OF CELLULAR RETINOIC
TITLE    2 ACID BINDING PROTEIN TYPE II IN COMPLEX WITH ALL-TRANS-RETINAL AT    
TITLE    3 1.18 ANGSTROMS RESOLUTION                                            
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CELLULAR RETINOIC ACID-BINDING PROTEIN 2;                  
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: CELLULAR RETINOIC ACID-BINDING PROTEIN II, CRABP-II,        
COMPND   5 RETINOIC ACID-BINDING PROTEIN II, CELLULAR;                          
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 GENE: CRABP2;                                                        
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3)PLYSS;                            
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: PET17-B                                   
KEYWDS    CRABPII, RETINOIC ACID, RETINOIDS, BETA BARREL, HIGH RESOLUTION,      
KEYWDS   2 SCHIFF BASE, PROTONATED SCHIFF BASE, RETINAL, TRANSPORT PROTEIN      
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    S.VAEZESLAMI,J.H.GEIGER                                               
REVDAT   8   29-JAN-25 2G7B    1       COMPND REMARK HET    HETNAM              
REVDAT   8 2                   1       FORMUL LINK   ATOM                       
REVDAT   7   16-OCT-24 2G7B    1       REMARK                                   
REVDAT   6   20-OCT-21 2G7B    1       REMARK SEQADV LINK                       
REVDAT   5   18-OCT-17 2G7B    1       REMARK                                   
REVDAT   4   24-FEB-09 2G7B    1       VERSN                                    
REVDAT   3   04-SEP-07 2G7B    1       JRNL                                     
REVDAT   2   01-MAY-07 2G7B    1       EXPDTA                                   
REVDAT   1   17-APR-07 2G7B    0                                                
JRNL        AUTH   C.VASILEIOU,S.VAEZESLAMI,R.M.CRIST,M.RABAGO-SMITH,           
JRNL        AUTH 2 J.H.GEIGER,B.BORHAN                                          
JRNL        TITL   PROTEIN DESIGN: REENGINEERING CELLULAR RETINOIC ACID BINDING 
JRNL        TITL 2 PROTEIN II INTO A RHODOPSIN PROTEIN MIMIC.                   
JRNL        REF    J.AM.CHEM.SOC.                V. 129  6140 2007              
JRNL        REFN                   ISSN 0002-7863                               
JRNL        PMID   17447762                                                     
JRNL        DOI    10.1021/JA067546R                                            
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   S.VAEZESLAMI                                                 
REMARK   1  TITL   DETERMINING CRYSTAL STRUCTURES OF PROTEINS AND PROTEIN       
REMARK   1  TITL 2 COMPLEXES BY X-RAY CRYSTALLOGRAPHY: X-RAY CRYSTALLOGRAPHIC   
REMARK   1  TITL 3 STUDIES OF THE MUTANTS OF CELLULAR RETINOIC ACID BINDING     
REMARK   1  TITL 4 PROTEIN TYPE II TOWARD DESIGNING A MIMIC OF RHODOPSIN        
REMARK   1  REF    THESIS                                                       
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.18 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC                                               
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.18                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 22.81                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 96.7                           
REMARK   3   NUMBER OF REFLECTIONS             : 52405                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.130                           
REMARK   3   R VALUE            (WORKING SET) : 0.129                           
REMARK   3   FREE R VALUE                     : 0.155                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.600                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 2920                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.18                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.21                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 2586                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 69.32                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1950                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 152                          
REMARK   3   BIN FREE R VALUE                    : 0.2150                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1071                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 22                                      
REMARK   3   SOLVENT ATOMS            : 250                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 12.18                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.31000                                              
REMARK   3    B22 (A**2) : 0.20000                                              
REMARK   3    B33 (A**2) : -0.51000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.031         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.032         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.019         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 0.899         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.979                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.972                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  1182 ; 0.019 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  1117 ; 0.002 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  1601 ; 1.795 ; 1.983       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  2625 ; 1.585 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   136 ; 7.047 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):    55 ;33.278 ;26.000       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   233 ;10.440 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):     6 ;10.899 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   195 ; 0.122 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  1252 ; 0.010 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):   220 ; 0.011 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   206 ; 0.333 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  1184 ; 0.241 ; 0.200       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):   564 ; 0.180 ; 0.200       
REMARK   3   NON-BONDED TORSION OTHERS         (A):   773 ; 0.088 ; 0.200       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   194 ; 0.173 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):     2 ; 0.362 ; 0.200       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):     9 ; 0.417 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):    51 ; 0.288 ; 0.200       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    27 ; 0.210 ; 0.200       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):   697 ; 1.917 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):   283 ; 0.952 ; 1.500       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  1159 ; 2.866 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):   498 ; 3.668 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):   441 ; 5.242 ; 4.500       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  2381 ; 1.949 ; 3.000       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):   287 ; 9.638 ; 3.000       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  2283 ; 4.631 ; 3.000       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                              
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : BABINET MODEL WITH MASK                              
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.20                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING   
REMARK   3  POSITIONS                                                           
REMARK   4                                                                      
REMARK   4 2G7B COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 21-MAR-06.                  
REMARK 100 THE DEPOSITION ID IS D_1000036778.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 19-JUN-04                          
REMARK 200  TEMPERATURE           (KELVIN) : 77                                 
REMARK 200  PH                             : 5.8                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 32-ID                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.000                              
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MARRESEARCH                        
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 52457                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.180                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 40.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 96.7                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : 0.07200                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 25.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.18                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.22                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 74.6                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.33200                            
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: RIGID BODY REFINEMENT        
REMARK 200 SOFTWARE USED: RIGID BODY REFINEMENT                                 
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 52.50                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.59                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 18% (W/V) PEG 6000 AND 0.1 M SODIUM      
REMARK 280  ACETATE PH 5.8, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21                       
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X+1/2,-Y,Z+1/2                                         
REMARK 290       3555   -X,Y+1/2,-Z+1/2                                         
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       22.72950            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       38.87350            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       22.75700            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       38.87350            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       22.72950            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       22.75700            
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: MONOMERIC                         
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 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 A  30    CG   CD   CE   NZ                                   
REMARK 470     LYS A  98    CG   CD   CE   NZ                                   
REMARK 470     LYS A 101    CG   CD   CE   NZ                                   
REMARK 470     GLU A 103    CG   CD   OE1  OE2                                  
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    ARG A  29   NE  -  CZ  -  NH1 ANGL. DEV. =   3.2 DEGREES          
REMARK 500    ARG A  29   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.3 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    GLU A  73     -150.68   -151.47                                   
REMARK 500    ASP A 126     -121.42     50.65                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 600                                                                      
REMARK 600 HETEROGEN                                                            
REMARK 600 ALL-TRANS RETINAL (LIGAND CODE RET) FORMED                           
REMARK 600 A PROTONATED SCHIFF BASE (PSB) WITH LYS 132                          
REMARK 600 AND CONVERTED INTO ALL-TRANS AXEROPTHENE                             
REMARK 600 (LIGAND CODE AZE)                                                    
REMARK 620                                                                      
REMARK 620 METAL COORDINATION                                                   
REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              NA A 300  NA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH A 454   O                                                      
REMARK 620 2 HOH A 512   O   113.8                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              NA A 301  NA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH A 515   O                                                      
REMARK 620 2 HOH A 550   O   119.5                                              
REMARK 620 N                    1                                               
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 300                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 301                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE RET A 138                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 2G7A   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 2G79   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 2G78   RELATED DB: PDB                                   
DBREF  2G7B A    1   137  UNP    P29373   RABP2_HUMAN      1    137             
SEQADV 2G7B LEU A  111  UNP  P29373    ARG   111 ENGINEERED MUTATION            
SEQADV 2G7B GLU A  121  UNP  P29373    LEU   121 ENGINEERED MUTATION            
SEQADV 2G7B LYS A  132  UNP  P29373    ARG   132 ENGINEERED MUTATION            
SEQRES   1 A  137  PRO ASN PHE SER GLY ASN TRP LYS ILE ILE ARG SER GLU          
SEQRES   2 A  137  ASN PHE GLU GLU LEU LEU LYS VAL LEU GLY VAL ASN VAL          
SEQRES   3 A  137  MET LEU ARG LYS ILE ALA VAL ALA ALA ALA SER LYS PRO          
SEQRES   4 A  137  ALA VAL GLU ILE LYS GLN GLU GLY ASP THR PHE TYR ILE          
SEQRES   5 A  137  LYS THR SER THR THR VAL ARG THR THR GLU ILE ASN PHE          
SEQRES   6 A  137  LYS VAL GLY GLU GLU PHE GLU GLU GLN THR VAL ASP GLY          
SEQRES   7 A  137  ARG PRO CYS LYS SER LEU VAL LYS TRP GLU SER GLU ASN          
SEQRES   8 A  137  LYS MET VAL CYS GLU GLN LYS LEU LEU LYS GLY GLU GLY          
SEQRES   9 A  137  PRO LYS THR SER TRP THR LEU GLU LEU THR ASN ASP GLY          
SEQRES  10 A  137  GLU LEU ILE GLU THR MET THR ALA ASP ASP VAL VAL CYS          
SEQRES  11 A  137  THR LYS VAL TYR VAL ARG GLU                                  
HET     NA  A 300       1                                                       
HET     NA  A 301       1                                                       
HET    RET  A 138      20                                                       
HETNAM      NA SODIUM ION                                                       
HETNAM     RET RETINAL                                                          
FORMUL   2   NA    2(NA 1+)                                                     
FORMUL   4  RET    C20 H28 O                                                    
FORMUL   5  HOH   *250(H2 O)                                                    
HELIX    1   1 ASN A   14  LEU A   22  1                                   9    
HELIX    2   2 ASN A   25  SER A   37  1                                  13    
SHEET    1   A10 ARG A  59  LYS A  66  0                                        
SHEET    2   A10 THR A  49  THR A  56 -1  N  PHE A  50   O  PHE A  65           
SHEET    3   A10 ALA A  40  GLU A  46 -1  N  GLU A  42   O  LYS A  53           
SHEET    4   A10 GLY A   5  GLU A  13 -1  N  TRP A   7   O  VAL A  41           
SHEET    5   A10 VAL A 128  ARG A 136 -1  O  VAL A 133   N  ILE A  10           
SHEET    6   A10 LEU A 119  ALA A 125 -1  N  MET A 123   O  CYS A 130           
SHEET    7   A10 THR A 107  LEU A 113 -1  N  GLU A 112   O  ILE A 120           
SHEET    8   A10 LYS A  92  LEU A  99 -1  N  CYS A  95   O  TRP A 109           
SHEET    9   A10 PRO A  80  SER A  89 -1  N  LYS A  82   O  LYS A  98           
SHEET   10   A10 PHE A  71  GLN A  74 -1  N  PHE A  71   O  SER A  83           
LINK         NZ  LYS A 132                 C15 RET A 138     1555   1555  1.32  
LINK        NA    NA A 300                 O   HOH A 454     1555   1555  2.52  
LINK        NA    NA A 300                 O  AHOH A 512     1555   1555  2.02  
LINK        NA    NA A 301                 O  BHOH A 515     1555   1555  2.52  
LINK        NA    NA A 301                 O   HOH A 550     1555   1555  2.08  
SITE     1 AC1  3 ASP A  48  HOH A 454  HOH A 512                               
SITE     1 AC2  6 VAL A  26  GLY A  68  ASN A 115  HOH A 515                    
SITE     2 AC2  6 HOH A 531  HOH A 550                                          
SITE     1 AC3 10 GLU A  13  PHE A  15  LEU A  28  THR A  54                    
SITE     2 AC3 10 ARG A  59  VAL A  76  GLU A 121  MET A 123                    
SITE     3 AC3 10 THR A 131  LYS A 132                                          
CRYST1   45.459   45.514   77.747  90.00  90.00  90.00 P 21 21 21    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      0.022000  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.021970  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.012860        0.00000