HEADER PROTON TRANSPORT 15-JUL-00 1FBK TITLE CRYSTAL STRUCTURE OF CYTOPLASMICALLY OPEN CONFORMATION OF TITLE 2 BACTERIORHODOPSIN COMPND MOL_ID: 1; COMPND 2 MOLECULE: BACTERIORHODOPSIN; COMPND 3 CHAIN: A; COMPND 4 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HALOBACTERIUM SALINARUM; SOURCE 3 ORGANISM_TAXID: 2242 KEYWDS PROTON PUMP, MEMBRANE PROTEIN, RETINAL PROTEIN, TWO-DIMENSIONAL KEYWDS 2 CRYSTAL ELECTRON DIFFRACTION, SINGLE CRYSTAL, PROTON TRANSPORT EXPDTA ELECTRON CRYSTALLOGRAPHY AUTHOR S.SUBRAMANIAM,R.HENDERSON REVDAT 7 06-NOV-24 1FBK 1 REMARK REVDAT 6 03-NOV-21 1FBK 1 REMARK SEQADV LINK REVDAT 5 31-JAN-18 1FBK 1 REMARK REVDAT 4 04-OCT-17 1FBK 1 REMARK REVDAT 3 13-JUL-11 1FBK 1 VERSN REVDAT 2 24-FEB-09 1FBK 1 VERSN REVDAT 1 09-AUG-00 1FBK 0 JRNL AUTH S.SUBRAMANIAM,R.HENDERSON JRNL TITL MOLECULAR MECHANISM OF VECTORIAL PROTON TRANSLOCATION BY JRNL TITL 2 BACTERIORHODOPSIN. JRNL REF NATURE V. 406 653 2000 JRNL REFN ISSN 0028-0836 JRNL PMID 10949309 JRNL DOI 10.1038/35020614 REMARK 2 REMARK 2 RESOLUTION. 3.20 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 0.9 REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- REMARK 3 : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU, REMARK 3 : READ,RICE,SIMONSON,WARREN REMARK 3 REMARK 3 REFINEMENT TARGET : ENGH & HUBER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 3.20 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 200.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 77.7 REMARK 3 NUMBER OF REFLECTIONS : 5668 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING SET) : 0.272 REMARK 3 FREE R VALUE : 0.321 REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : 610 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : NULL REMARK 3 BIN RESOLUTION RANGE LOW (A) : NULL REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1726 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 20 REMARK 3 SOLVENT ATOMS : 0 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : NULL REMARK 3 B22 (A**2) : NULL REMARK 3 B33 (A**2) : NULL REMARK 3 B12 (A**2) : NULL REMARK 3 B13 (A**2) : NULL REMARK 3 B23 (A**2) : NULL REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM SIGMAA (A) : NULL REMARK 3 LOW RESOLUTION CUTOFF (A) : NULL REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.009 REMARK 3 BOND ANGLES (DEGREES) : 1.400 REMARK 3 DIHEDRAL ANGLES (DEGREES) : NULL REMARK 3 IMPROPER ANGLES (DEGREES) : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : NULL REMARK 3 KSOL : NULL REMARK 3 BSOL : NULL REMARK 3 REMARK 3 NCS MODEL : NULL REMARK 3 REMARK 3 NCS RESTRAINTS. RMS SIGMA/WEIGHT REMARK 3 GROUP 1 POSITIONAL (A) : NULL ; NULL REMARK 3 GROUP 1 B-FACTOR (A**2) : NULL ; NULL REMARK 3 REMARK 3 PARAMETER FILE 1 : NULL REMARK 3 TOPOLOGY FILE 1 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: REMARK 3 EACH DIFFRACTION PATTERN WAS AUTOMATICALLY INDEXED, AND THE SPOT REMARK 3 INTENSITIES REMARK 3 WERE REMARK 3 INTEGRATED EITHER USING A RASTER (FOR PATTERNS RECORDED AT REMARK 3 SPECIMEN TILTS REMARK 3 LESS THAN REMARK 3 30 DEGREES) OR USING PROFILE FITTING (FOR PATTERNS RECORDED AT REMARK 3 SPECIMEN REMARK 3 TILTS AT OR REMARK 3 GREATER THAN 30 DEGREES, WHICH REPRESENTED ABOUT 80% OF THE TOTAL REMARK 3 DATA SET). REMARK 3 EACH REMARK 3 PATTERN WAS THEN COMPARED TO THE CURVES RECORDED FOR WILD-TYPE REMARK 3 BACTERIORHODOPSIN REMARK 3 IN GLUCOSE AT -100 DEGREES C [CESKA AND HENDERSON J. MOL. BIOL. REMARK 3 213: 539-560 REMARK 3 REMARK 3 (1990)], AND THE RELATIVE PROPORTIONS OF THE FOUR DIFFERENT TWINS REMARK 3 DETERMINED. THIS REMARK 3 EXERCISE WAS CARRIED OUT WITH ALL FOUR THEORETICALLY POSSIBLE REMARK 3 ORIENTATIONS REMARK 3 OF THE REMARK 3 CRYSTAL AXES RELATIVE TO THE PREVIOUS REFERENCE CURVES TO ENSURE REMARK 3 THAT THE REMARK 3 DATA WERE REMARK 3 MERGED CORRECTLY. FROM THE INITIAL SET OF 486 PATTERNS CHOSEN, 286 REMARK 3 MINIMALLY REMARK 3 REMARK 3 TWINNED DIFFRACTION PATTERNS WERE SELECTED IN WHICH THE MAJOR TWIN REMARK 3 PROPORTION WAS REMARK 3 GREATER THAN 0.8. THESE 286 PATTERNS WERE MERGED USING THE WILD- REMARK 3 TYPE LATTICE REMARK 3 LINES REMARK 3 AS A REFERENCE AND LATTICE LINES WERE FITTED TO THE DATA TO OBTAIN REMARK 3 AN REMARK 3 INITIAL REMARK 3 APPROXIMATELY MERGED SET OF LATTICE LINES (MERGE #1) DESCRIBING THE REMARK 3 STRUCTURE OF REMARK 3 THE TRIPLE MUTANT. THE ORIGINAL SET OF 486 PATTERNS WAS THEN REMARK 3 MERGED AGAINST REMARK 3 THE REMARK 3 NEW LATTICE CURVES TO REDETERMINE THE TWIN PROPORTIONS MORE REMARK 3 ACCURATELY. THE REMARK 3 MERGING PARAMETERS FOR EACH CRYSTAL WERE INSPECTED CAREFULLY AGAIN, REMARK 3 AND 84 REMARK 3 CRYSTALS REMARK 3 FOR WHICH THE MAJOR TWIN PROPORTION WAS LESS THAN 0.70 WERE REMARK 3 EXCLUDED FROM REMARK 3 THE REMARK 3 DATA SET. THE REMAINING 402 SUBSTANTIALLY UNTWINNED DIFFRACTION REMARK 3 PATTERNS REMARK 3 WERE REMARK 3 USED TO GENERATE A NEW SET OF CURVES AND THE PROCEDURE REPEATED TO REMARK 3 CREATE A REMARK 3 STABLE REMARK 3 SET OF LATTICE LINES. THE MERGED DATA WERE FURTHER IMPROVED BY REMARK 3 USING AN REMARK 3 ESTIMATE REMARK 3 OF SIGMA VALUES FOR EACH REFLECTION, AND BY THE INCLUSION OF AN REMARK 3 INDIVIDUAL REMARK 3 WEIGHTING FACTOR FOR EACH DIFFRACTION PATTERN USING PROCEDURES REMARK 3 DESCRIBED BY REMARK 3 GRIGORIEFF REMARK 3 AND HENDERSON [ULTRAMICROSCOPY 60: 295-309 (1995)]. TWO CYCLES OF REMARK 3 THIS REMARK 3 REFINEMENT WERE CARRIED OUT TO OBTAIN A FINAL SET OF MERGED REMARK 3 CURVES. THE REMARK 3 CURVES REMARK 3 WERE SAMPLED AT 1/100 ANGSTROMS (APPROXIMATELY TWICE THE THICKNESS REMARK 3 OF THE REMARK 3 MEMBRANE) TO OBTAIN A SET OF INTENSITIES AT H,K,L VALUES SO THAT REMARK 3 THE DATA REMARK 3 COULD REMARK 3 BE FURTHER PROCESSED WITH STANDARD X-RAY CRYSTALLOGRAPHIC REMARK 3 PROGRAMS. FOR THE REMARK 3 TILT ANGLES USED, THE MAXIMAL POSSIBLE THEORETICAL COMPLETENESS OF REMARK 3 THE DATA REMARK 3 SET REMARK 3 IS ~87%. THE COMPLETENESS OF OUR DATA IS CLOSE TO THIS LIMIT UP TO REMARK 3 3.5 REMARK 3 ANGSTROMS. REMARK 3 THE COMPLETENESS DROPS TO 77.7 % WHEN ALL OF THE DATA TO 3.2 REMARK 3 ANGSTROMS IS REMARK 3 INCLUDED. REMARK 4 REMARK 4 1FBK COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 18-JUL-00. REMARK 100 THE DEPOSITION ID IS D_1000011456. REMARK 240 REMARK 240 EXPERIMENTAL DETAILS REMARK 240 RECONSTRUCTION METHOD : CRYSTALLOGRAPHY REMARK 240 SAMPLE TYPE : 2D ARRAY REMARK 240 SPECIMEN TYPE : NULL REMARK 240 DATA ACQUISITION REMARK 240 DATE OF DATA COLLECTION : 01-DEC-98 REMARK 240 TEMPERATURE (KELVIN) : 93.0 REMARK 240 PH : 7.00 REMARK 240 NUMBER OF CRYSTALS USED : 402 REMARK 240 MICROSCOPE MODEL : FEI/PHILIPS CM12 REMARK 240 DETECTOR TYPE : GENERIC CCD REMARK 240 ACCELERATION VOLTAGE (KV) : NULL REMARK 240 NUMBER OF UNIQUE REFLECTIONS : 5668 REMARK 240 RESOLUTION RANGE HIGH (A) : 3.200 REMARK 240 RESOLUTION RANGE LOW (A) : 200.000 REMARK 240 DATA SCALING SOFTWARE : MRC ELECTRON DIFFRACTION REMARK 240 PROGRAMS REMARK 240 COMPLETENESS FOR RANGE (%) : 77.7 REMARK 240 DATA REDUNDANCY : NULL REMARK 240 IN THE HIGHEST RESOLUTION SHELL REMARK 240 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) :NULL REMARK 240 HIGHEST RESOLUTION SHELL, RANGE LOW (A) :NULL REMARK 240 COMPLETENESS FOR SHELL (%) : NULL REMARK 240 DATA REDUNDANCY IN SHELL : NULL REMARK 240 R MERGE FOR SHELL (I) : NULL REMARK 240 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 240 SOFTWARE USED : MRC ELECTRON DIFFRACTION REMARK 240 PROGRAMS REMARK 240 STARTING MODEL : NULL REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 3 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z REMARK 290 3555 -X+Y,-X,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 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 2 0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 3 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 3 -0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 REMARK 290 REMARK: NULL REMARK 300 REMARK 300 BIOMOLECULE: 1 REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON REMARK 300 BURIED SURFACE AREA. REMARK 300 REMARK: TRIMER IS PRESENT IN VIVO. THE CRYSTALS CONTAIN TRIMERS REMARK 300 RELATED BY CRYSTAL SYMMETRY P3. 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,PQS REMARK 350 TOTAL BURIED SURFACE AREA: 6470 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 27970 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -51.0 KCAL/MOL 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 350 BIOMT1 2 -0.500000 -0.866025 0.000000 0.00000 REMARK 350 BIOMT2 2 0.866025 -0.500000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 1.000000 0.00000 REMARK 350 BIOMT1 3 -0.500000 0.866025 0.000000 0.00000 REMARK 350 BIOMT2 3 -0.866025 -0.500000 0.000000 0.00000 REMARK 350 BIOMT3 3 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 GLN A 1 REMARK 465 ALA A 2 REMARK 465 GLN A 3 REMARK 465 ILE A 229 REMARK 465 PHE A 230 REMARK 465 GLY A 231 REMARK 465 GLU A 232 REMARK 465 ALA A 233 REMARK 465 GLU A 234 REMARK 465 ALA A 235 REMARK 465 PRO A 236 REMARK 465 GLU A 237 REMARK 465 PRO A 238 REMARK 465 SER A 239 REMARK 465 ALA A 240 REMARK 465 GLY A 241 REMARK 465 ASP A 242 REMARK 465 GLY A 243 REMARK 465 ALA A 244 REMARK 465 ALA A 245 REMARK 465 ALA A 246 REMARK 465 THR A 247 REMARK 465 SER A 248 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 ILE A 4 CG1 CG2 CD1 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 ARG A 7 -73.49 -139.68 REMARK 500 VAL A 29 58.15 -102.38 REMARK 500 LYS A 30 12.94 -177.16 REMARK 500 VAL A 34 135.22 64.57 REMARK 500 SER A 35 -74.71 -114.55 REMARK 500 ASP A 102 96.32 25.81 REMARK 500 ALA A 126 -19.26 -48.37 REMARK 500 TYR A 131 -75.08 -31.07 REMARK 500 ILE A 148 -74.03 -53.95 REMARK 500 PHE A 153 -96.18 -59.53 REMARK 500 PHE A 154 80.38 -52.04 REMARK 500 PHE A 156 29.29 -76.33 REMARK 500 THR A 157 -64.70 -132.92 REMARK 500 SER A 158 -76.51 -67.04 REMARK 500 LYS A 159 -1.76 -55.14 REMARK 500 GLU A 161 -55.09 -144.78 REMARK 500 SER A 162 65.63 -61.66 REMARK 500 MET A 163 -113.57 -153.62 REMARK 500 VAL A 167 -70.04 -32.19 REMARK 500 SER A 169 -83.89 -72.39 REMARK 500 VAL A 173 -75.93 -81.00 REMARK 500 ARG A 175 -75.14 -58.17 REMARK 500 SER A 183 -11.39 -49.16 REMARK 500 GLU A 194 -7.48 -58.33 REMARK 500 ALA A 196 -144.89 -77.18 REMARK 500 ASP A 212 -76.94 -65.26 REMARK 500 VAL A 213 -42.74 -28.06 REMARK 500 LYS A 216 -81.61 -52.28 REMARK 500 LEU A 221 -76.33 -49.45 REMARK 500 REMARK 500 REMARK: NULL REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE RET A 1216 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1FBB RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF NATIVE CONFORMATION OF BACTERIORHODOPSIN DBREF 1FBK A 1 248 UNP P02945 BACR_HALN1 14 261 SEQADV 1FBK GLY A 96 UNP P02945 ASP 109 ENGINEERED MUTATION SEQADV 1FBK CYS A 171 UNP P02945 PHE 184 ENGINEERED MUTATION SEQADV 1FBK LEU A 219 UNP P02945 PHE 232 ENGINEERED MUTATION SEQRES 1 A 248 GLN ALA GLN ILE THR GLY ARG PRO GLU TRP ILE TRP LEU SEQRES 2 A 248 ALA LEU GLY THR ALA LEU MET GLY LEU GLY THR LEU TYR SEQRES 3 A 248 PHE LEU VAL LYS GLY MET GLY VAL SER ASP PRO ASP ALA SEQRES 4 A 248 LYS LYS PHE TYR ALA ILE THR THR LEU VAL PRO ALA ILE SEQRES 5 A 248 ALA PHE THR MET TYR LEU SER MET LEU LEU GLY TYR GLY SEQRES 6 A 248 LEU THR MET VAL PRO PHE GLY GLY GLU GLN ASN PRO ILE SEQRES 7 A 248 TYR TRP ALA ARG TYR ALA ASP TRP LEU PHE THR THR PRO SEQRES 8 A 248 LEU LEU LEU LEU GLY LEU ALA LEU LEU VAL ASP ALA ASP SEQRES 9 A 248 GLN GLY THR ILE LEU ALA LEU VAL GLY ALA ASP GLY ILE SEQRES 10 A 248 MET ILE GLY THR GLY LEU VAL GLY ALA LEU THR LYS VAL SEQRES 11 A 248 TYR SER TYR ARG PHE VAL TRP TRP ALA ILE SER THR ALA SEQRES 12 A 248 ALA MET LEU TYR ILE LEU TYR VAL LEU PHE PHE GLY PHE SEQRES 13 A 248 THR SER LYS ALA GLU SER MET ARG PRO GLU VAL ALA SER SEQRES 14 A 248 THR CYS LYS VAL LEU ARG ASN VAL THR VAL VAL LEU TRP SEQRES 15 A 248 SER ALA TYR PRO VAL VAL TRP LEU ILE GLY SER GLU GLY SEQRES 16 A 248 ALA GLY ILE VAL PRO LEU ASN ILE GLU THR LEU LEU PHE SEQRES 17 A 248 MET VAL LEU ASP VAL SER ALA LYS VAL GLY LEU GLY LEU SEQRES 18 A 248 ILE LEU LEU ARG SER ARG ALA ILE PHE GLY GLU ALA GLU SEQRES 19 A 248 ALA PRO GLU PRO SER ALA GLY ASP GLY ALA ALA ALA THR SEQRES 20 A 248 SER HET RET A1216 20 HETNAM RET RETINAL FORMUL 2 RET C20 H28 O HELIX 1 1 GLU A 9 VAL A 29 1 21 HELIX 2 2 ASP A 36 GLY A 63 1 28 HELIX 3 3 TYR A 79 VAL A 101 1 23 HELIX 4 4 ASP A 104 THR A 128 1 25 HELIX 5 5 VAL A 130 PHE A 153 1 24 HELIX 6 6 GLU A 166 GLY A 192 1 27 HELIX 7 7 PRO A 200 SER A 226 1 27 SHEET 1 A 2 THR A 67 PHE A 71 0 SHEET 2 A 2 GLU A 74 ILE A 78 -1 O GLU A 74 N PHE A 71 LINK NZ LYS A 216 C15 RET A1216 1555 1555 1.33 SITE 1 AC1 10 TRP A 86 THR A 89 THR A 90 LEU A 93 SITE 2 AC1 10 MET A 118 SER A 141 TYR A 185 PRO A 186 SITE 3 AC1 10 TRP A 189 LYS A 216 CRYST1 62.450 62.450 100.900 90.00 90.00 120.00 P 3 3 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 0.016013 0.009245 0.000000 0.00000 SCALE2 0.000000 0.018490 0.000000 0.00000 SCALE3 0.000000 0.000000 0.009911 0.00000