PDB Short entry for 1TLF HEADER TRANSCRIPTION REGULATION 06-MAR-95 1TLF TITLE UNPRECEDENTED QUATERNARY STRUCTURE OF E. COLI LAC REPRESSOR CORE TITLE 2 TETRAMER: IMPLICATIONS FOR DNA LOOPING COMPND MOL_ID: 1; COMPND 2 MOLECULE: LAC REPRESSOR; COMPND 3 CHAIN: A, B, C, D; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; SOURCE 3 ORGANISM_TAXID: 562; SOURCE 4 EXPRESSION_SYSTEM_VECTOR_TYPE: LAC KEYWDS TRANSCRIPTION REGULATION EXPDTA X-RAY DIFFRACTION AUTHOR A.M.FRIEDMAN,T.O.FISCHMANN,T.A.STEITZ REVDAT 4 14-FEB-24 1TLF 1 HETSYN REVDAT 3 29-JUL-20 1TLF 1 COMPND REMARK HETNAM SITE REVDAT 2 24-FEB-09 1TLF 1 VERSN REVDAT 1 31-JUL-95 1TLF 0 JRNL AUTH A.M.FRIEDMAN,T.O.FISCHMANN,T.A.STEITZ JRNL TITL CRYSTAL STRUCTURE OF LAC REPRESSOR CORE TETRAMER AND ITS JRNL TITL 2 IMPLICATIONS FOR DNA LOOPING. JRNL REF SCIENCE V. 268 1721 1995 JRNL REFN ISSN 0036-8075 JRNL PMID 7792597 REMARK 2 REMARK 2 RESOLUTION. 2.60 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.60 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : NULL 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) (%) : NULL REMARK 3 NUMBER OF REFLECTIONS : NULL REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING SET) : 0.222 REMARK 3 FREE R VALUE : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : NULL REMARK 3 BIN RESOLUTION RANGE LOW (A) : NULL REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 8852 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 72 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) : 0.012 REMARK 3 BOND ANGLES (DEGREES) : 1.800 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 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 THE C1 AND HG ATOMS OF THE EMC HET GROUP ARE CHEMICALLY REMARK 3 BOUND. THE BOND DISTANCE BETWEEN THEM IS GREATER THAN REMARK 3 EXPECTED DUE TO THE LACK OF BONDING RESTRAINT IN THE REMARK 3 REFINEMENT AND LIMITED RESOLUTION. REMARK 4 REMARK 4 1TLF COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL. REMARK 100 THE DEPOSITION ID IS D_1000176718. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : NULL REMARK 200 PH : NULL REMARK 200 NUMBER OF CRYSTALS USED : NULL REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : NULL REMARK 200 RADIATION SOURCE : NULL REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : NULL REMARK 200 WAVELENGTH OR RANGE (A) : NULL REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : NULL REMARK 200 DETECTOR MANUFACTURER : NULL REMARK 200 INTENSITY-INTEGRATION SOFTWARE : NULL REMARK 200 DATA SCALING SOFTWARE : NULL REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 37549 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.600 REMARK 200 RESOLUTION RANGE LOW (A) : 8.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 2.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 97.5 REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : NULL REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : NULL REMARK 200 COMPLETENESS FOR SHELL (%) : NULL REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: X-PLOR REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 53.99 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.67 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,Y+1/2,-Z REMARK 290 REMARK 290 WHERE NNN -> OPERATOR NUMBER REMARK 290 MMM -> TRANSLATION VECTOR REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY REMARK 290 RELATED MOLECULES. REMARK 290 SMTRY1 1 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 1 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 1 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 2 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 2 0.000000 1.000000 0.000000 32.36500 REMARK 290 SMTRY3 2 0.000000 0.000000 -1.000000 0.00000 REMARK 290 REMARK 290 REMARK: NULL REMARK 300 REMARK 300 BIOMOLECULE: 1 REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON REMARK 300 BURIED SURFACE AREA. REMARK 350 REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS REMARK 350 GIVEN BELOW. BOTH NON-CRYSTALLOGRAPHIC AND REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN. REMARK 350 REMARK 350 BIOMOLECULE: 1 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: TETRAMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 14960 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 41400 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -95.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D 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 GLN A 60 REMARK 465 GLU A 357 REMARK 465 SER A 358 REMARK 465 GLY A 359 REMARK 465 GLN A 360 REMARK 465 GLN B 60 REMARK 465 GLU B 357 REMARK 465 SER B 358 REMARK 465 GLY B 359 REMARK 465 GLN B 360 REMARK 465 GLN C 60 REMARK 465 GLU C 357 REMARK 465 SER C 358 REMARK 465 GLY C 359 REMARK 465 GLN C 360 REMARK 465 GLN D 60 REMARK 465 GLU D 357 REMARK 465 SER D 358 REMARK 465 GLY D 359 REMARK 465 GLN D 360 REMARK 600 REMARK 600 HETEROGEN REMARK 600 REMARK 600 THE MOLECULE WAS CRYSTALLIZED AS A COMPLEX WITH REMARK 600 ISOPROPYL-BETA-D-THIOGLACTOPYRANOSIDE AND THE ETHYL REMARK 600 MERCURIC ION, WHICH IS FOUND BOUND TO RESIDUE CYS281. REMARK 600 THESE MOIETIES ARE INCLUDED AS HETATM RECORDS. DBREF 1TLF A 60 360 UNP P03023 LACI_ECOLI 19 319 DBREF 1TLF B 60 360 UNP P03023 LACI_ECOLI 19 319 DBREF 1TLF C 60 360 UNP P03023 LACI_ECOLI 19 319 DBREF 1TLF D 60 360 UNP P03023 LACI_ECOLI 19 319 SEQRES 1 A 301 GLN SER LEU LEU ILE GLY VAL ALA THR SER SER LEU ALA SEQRES 2 A 301 LEU HIS ALA PRO SER GLN ILE VAL ALA ALA ILE LYS SER SEQRES 3 A 301 ARG ALA ASP GLN LEU GLY ALA SER VAL VAL VAL SER MET SEQRES 4 A 301 VAL GLU ARG SER GLY VAL GLU ALA CYS LYS ALA ALA VAL SEQRES 5 A 301 HIS ASN LEU LEU ALA GLN ARG VAL SER GLY LEU ILE ILE SEQRES 6 A 301 ASN TYR PRO LEU ASP ASP GLN ASP ALA ILE ALA VAL GLU SEQRES 7 A 301 ALA ALA CYS THR ASN VAL PRO ALA LEU PHE LEU ASP VAL SEQRES 8 A 301 SER ASP GLN THR PRO ILE ASN SER ILE ILE PHE SER HIS SEQRES 9 A 301 GLU ASP GLY THR ARG LEU GLY VAL GLU HIS LEU VAL ALA SEQRES 10 A 301 LEU GLY HIS GLN GLN ILE ALA LEU LEU ALA GLY PRO LEU SEQRES 11 A 301 SER SER VAL SER ALA ARG LEU ARG LEU ALA GLY TRP HIS SEQRES 12 A 301 LYS TYR LEU THR ARG ASN GLN ILE GLN PRO ILE ALA GLU SEQRES 13 A 301 ARG GLU GLY ASP TRP SER ALA MET SER GLY PHE GLN GLN SEQRES 14 A 301 THR MET GLN MET LEU ASN GLU GLY ILE VAL PRO THR ALA SEQRES 15 A 301 MET LEU VAL ALA ASN ASP GLN MET ALA LEU GLY ALA MET SEQRES 16 A 301 ARG ALA ILE THR GLU SER GLY LEU ARG VAL GLY ALA ASP SEQRES 17 A 301 ILE SER VAL VAL GLY TYR ASP ASP THR GLU ASP SER SER SEQRES 18 A 301 CYS TYR ILE PRO PRO LEU THR THR ILE LYS GLN ASP PHE SEQRES 19 A 301 ARG LEU LEU GLY GLN THR SER VAL ASP ARG LEU LEU GLN SEQRES 20 A 301 LEU SER GLN GLY GLN ALA VAL LYS GLY ASN GLN LEU LEU SEQRES 21 A 301 PRO VAL SER LEU VAL LYS ARG LYS THR THR LEU ALA PRO SEQRES 22 A 301 ASN THR GLN THR ALA SER PRO ARG ALA LEU ALA ASP SER SEQRES 23 A 301 LEU MET GLN LEU ALA ARG GLN VAL SER ARG LEU GLU SER SEQRES 24 A 301 GLY GLN SEQRES 1 B 301 GLN SER LEU LEU ILE GLY VAL ALA THR SER SER LEU ALA SEQRES 2 B 301 LEU HIS ALA PRO SER GLN ILE VAL ALA ALA ILE LYS SER SEQRES 3 B 301 ARG ALA ASP GLN LEU GLY ALA SER VAL VAL VAL SER MET SEQRES 4 B 301 VAL GLU ARG SER GLY VAL GLU ALA CYS LYS ALA ALA VAL SEQRES 5 B 301 HIS ASN LEU LEU ALA GLN ARG VAL SER GLY LEU ILE ILE SEQRES 6 B 301 ASN TYR PRO LEU ASP ASP GLN ASP ALA ILE ALA VAL GLU SEQRES 7 B 301 ALA ALA CYS THR ASN VAL PRO ALA LEU PHE LEU ASP VAL SEQRES 8 B 301 SER ASP GLN THR PRO ILE ASN SER ILE ILE PHE SER HIS SEQRES 9 B 301 GLU ASP GLY THR ARG LEU GLY VAL GLU HIS LEU VAL ALA SEQRES 10 B 301 LEU GLY HIS GLN GLN ILE ALA LEU LEU ALA GLY PRO LEU SEQRES 11 B 301 SER SER VAL SER ALA ARG LEU ARG LEU ALA GLY TRP HIS SEQRES 12 B 301 LYS TYR LEU THR ARG ASN GLN ILE GLN PRO ILE ALA GLU SEQRES 13 B 301 ARG GLU GLY ASP TRP SER ALA MET SER GLY PHE GLN GLN SEQRES 14 B 301 THR MET GLN MET LEU ASN GLU GLY ILE VAL PRO THR ALA SEQRES 15 B 301 MET LEU VAL ALA ASN ASP GLN MET ALA LEU GLY ALA MET SEQRES 16 B 301 ARG ALA ILE THR GLU SER GLY LEU ARG VAL GLY ALA ASP SEQRES 17 B 301 ILE SER VAL VAL GLY TYR ASP ASP THR GLU ASP SER SER SEQRES 18 B 301 CYS TYR ILE PRO PRO LEU THR THR ILE LYS GLN ASP PHE SEQRES 19 B 301 ARG LEU LEU GLY GLN THR SER VAL ASP ARG LEU LEU GLN SEQRES 20 B 301 LEU SER GLN GLY GLN ALA VAL LYS GLY ASN GLN LEU LEU SEQRES 21 B 301 PRO VAL SER LEU VAL LYS ARG LYS THR THR LEU ALA PRO SEQRES 22 B 301 ASN THR GLN THR ALA SER PRO ARG ALA LEU ALA ASP SER SEQRES 23 B 301 LEU MET GLN LEU ALA ARG GLN VAL SER ARG LEU GLU SER SEQRES 24 B 301 GLY GLN SEQRES 1 C 301 GLN SER LEU LEU ILE GLY VAL ALA THR SER SER LEU ALA SEQRES 2 C 301 LEU HIS ALA PRO SER GLN ILE VAL ALA ALA ILE LYS SER SEQRES 3 C 301 ARG ALA ASP GLN LEU GLY ALA SER VAL VAL VAL SER MET SEQRES 4 C 301 VAL GLU ARG SER GLY VAL GLU ALA CYS LYS ALA ALA VAL SEQRES 5 C 301 HIS ASN LEU LEU ALA GLN ARG VAL SER GLY LEU ILE ILE SEQRES 6 C 301 ASN TYR PRO LEU ASP ASP GLN ASP ALA ILE ALA VAL GLU SEQRES 7 C 301 ALA ALA CYS THR ASN VAL PRO ALA LEU PHE LEU ASP VAL SEQRES 8 C 301 SER ASP GLN THR PRO ILE ASN SER ILE ILE PHE SER HIS SEQRES 9 C 301 GLU ASP GLY THR ARG LEU GLY VAL GLU HIS LEU VAL ALA SEQRES 10 C 301 LEU GLY HIS GLN GLN ILE ALA LEU LEU ALA GLY PRO LEU SEQRES 11 C 301 SER SER VAL SER ALA ARG LEU ARG LEU ALA GLY TRP HIS SEQRES 12 C 301 LYS TYR LEU THR ARG ASN GLN ILE GLN PRO ILE ALA GLU SEQRES 13 C 301 ARG GLU GLY ASP TRP SER ALA MET SER GLY PHE GLN GLN SEQRES 14 C 301 THR MET GLN MET LEU ASN GLU GLY ILE VAL PRO THR ALA SEQRES 15 C 301 MET LEU VAL ALA ASN ASP GLN MET ALA LEU GLY ALA MET SEQRES 16 C 301 ARG ALA ILE THR GLU SER GLY LEU ARG VAL GLY ALA ASP SEQRES 17 C 301 ILE SER VAL VAL GLY TYR ASP ASP THR GLU ASP SER SER SEQRES 18 C 301 CYS TYR ILE PRO PRO LEU THR THR ILE LYS GLN ASP PHE SEQRES 19 C 301 ARG LEU LEU GLY GLN THR SER VAL ASP ARG LEU LEU GLN SEQRES 20 C 301 LEU SER GLN GLY GLN ALA VAL LYS GLY ASN GLN LEU LEU SEQRES 21 C 301 PRO VAL SER LEU VAL LYS ARG LYS THR THR LEU ALA PRO SEQRES 22 C 301 ASN THR GLN THR ALA SER PRO ARG ALA LEU ALA ASP SER SEQRES 23 C 301 LEU MET GLN LEU ALA ARG GLN VAL SER ARG LEU GLU SER SEQRES 24 C 301 GLY GLN SEQRES 1 D 301 GLN SER LEU LEU ILE GLY VAL ALA THR SER SER LEU ALA SEQRES 2 D 301 LEU HIS ALA PRO SER GLN ILE VAL ALA ALA ILE LYS SER SEQRES 3 D 301 ARG ALA ASP GLN LEU GLY ALA SER VAL VAL VAL SER MET SEQRES 4 D 301 VAL GLU ARG SER GLY VAL GLU ALA CYS LYS ALA ALA VAL SEQRES 5 D 301 HIS ASN LEU LEU ALA GLN ARG VAL SER GLY LEU ILE ILE SEQRES 6 D 301 ASN TYR PRO LEU ASP ASP GLN ASP ALA ILE ALA VAL GLU SEQRES 7 D 301 ALA ALA CYS THR ASN VAL PRO ALA LEU PHE LEU ASP VAL SEQRES 8 D 301 SER ASP GLN THR PRO ILE ASN SER ILE ILE PHE SER HIS SEQRES 9 D 301 GLU ASP GLY THR ARG LEU GLY VAL GLU HIS LEU VAL ALA SEQRES 10 D 301 LEU GLY HIS GLN GLN ILE ALA LEU LEU ALA GLY PRO LEU SEQRES 11 D 301 SER SER VAL SER ALA ARG LEU ARG LEU ALA GLY TRP HIS SEQRES 12 D 301 LYS TYR LEU THR ARG ASN GLN ILE GLN PRO ILE ALA GLU SEQRES 13 D 301 ARG GLU GLY ASP TRP SER ALA MET SER GLY PHE GLN GLN SEQRES 14 D 301 THR MET GLN MET LEU ASN GLU GLY ILE VAL PRO THR ALA SEQRES 15 D 301 MET LEU VAL ALA ASN ASP GLN MET ALA LEU GLY ALA MET SEQRES 16 D 301 ARG ALA ILE THR GLU SER GLY LEU ARG VAL GLY ALA ASP SEQRES 17 D 301 ILE SER VAL VAL GLY TYR ASP ASP THR GLU ASP SER SER SEQRES 18 D 301 CYS TYR ILE PRO PRO LEU THR THR ILE LYS GLN ASP PHE SEQRES 19 D 301 ARG LEU LEU GLY GLN THR SER VAL ASP ARG LEU LEU GLN SEQRES 20 D 301 LEU SER GLN GLY GLN ALA VAL LYS GLY ASN GLN LEU LEU SEQRES 21 D 301 PRO VAL SER LEU VAL LYS ARG LYS THR THR LEU ALA PRO SEQRES 22 D 301 ASN THR GLN THR ALA SER PRO ARG ALA LEU ALA ASP SER SEQRES 23 D 301 LEU MET GLN LEU ALA ARG GLN VAL SER ARG LEU GLU SER SEQRES 24 D 301 GLY GLN HET EMC A 999 3 HET IPT A 998 26 HET EMC B 999 3 HET IPT B 998 26 HET EMC C 999 3 HET IPT C 998 26 HET EMC D 999 3 HET IPT D 998 26 HETNAM EMC ETHYL MERCURY ION HETNAM IPT 1-METHYLETHYL 1-THIO-BETA-D-GALACTOPYRANOSIDE HETSYN IPT ISOPROPYL-1-BETA-D-THIOGALACTOSIDE; 1-(ISOPROPYLTHIO)- HETSYN 2 IPT BETA-GALACTOPYRANSIDE; 1-METHYLETHYL 1-THIO-BETA-D- HETSYN 3 IPT GALACTOSIDE; 1-METHYLETHYL 1-THIO-D-GALACTOSIDE; 1- HETSYN 4 IPT METHYLETHYL 1-THIO-GALACTOSIDE FORMUL 5 EMC 4(C2 H5 HG 1+) FORMUL 6 IPT 4(C9 H18 O5 S) HELIX 1 A1 HIS A 74 GLN A 89 1 16 HELIX 2 B1 VAL A 104 LEU A 115 1 12 HELIX 3 C1 ASP A 130 ALA A 139 1 10 HELIX 4 D1 HIS A 163 ALA A 176 1 14 HELIX 5 E1 VAL A 192 ARG A 207 1 16 HELIX 6 F1 ALA A 222 ASN A 234 1 13 HELIX 7 G1 ASP A 247 GLU A 259 1 13 HELIX 8 H1 PHE A 293 SER A 308 1 16 HELIX 9 I1 PRO A 339 ARG A 355 1 17 HELIX 10 A2 HIS B 74 GLN B 89 1 16 HELIX 11 B2 VAL B 104 LEU B 115 1 12 HELIX 12 C2 ASP B 130 ALA B 139 1 10 HELIX 13 D2 HIS B 163 ALA B 176 1 14 HELIX 14 E2 VAL B 192 ARG B 207 1 16 HELIX 15 F2 ALA B 222 ASN B 234 1 13 HELIX 16 G2 ASP B 247 GLU B 259 1 13 HELIX 17 H2 PHE B 293 SER B 308 1 16 HELIX 18 I2 PRO B 339 ARG B 355 1 17 HELIX 19 A3 HIS C 74 GLN C 89 1 16 HELIX 20 B3 VAL C 104 LEU C 115 1 12 HELIX 21 C3 ASP C 130 ALA C 139 1 10 HELIX 22 D3 HIS C 163 ALA C 176 1 14 HELIX 23 E3 VAL C 192 ARG C 207 1 16 HELIX 24 F3 ALA C 222 ASN C 234 1 13 HELIX 25 G3 ASP C 247 GLU C 259 1 13 HELIX 26 H3 PHE C 293 SER C 308 1 16 HELIX 27 I3 PRO C 339 ARG C 355 1 17 HELIX 28 A4 HIS D 74 GLN D 89 1 16 HELIX 29 B4 VAL D 104 LEU D 115 1 12 HELIX 30 C4 ASP D 130 ALA D 139 1 10 HELIX 31 D4 HIS D 163 ALA D 176 1 14 HELIX 32 E4 VAL D 192 ARG D 207 1 16 HELIX 33 F4 ALA D 222 ASN D 234 1 13 HELIX 34 G4 ASP D 247 GLU D 259 1 13 HELIX 35 H4 PHE D 293 SER D 308 1 16 HELIX 36 I4 PRO D 339 ARG D 355 1 17 SHEET 1 S1 6 SER A 93 MET A 98 0 SHEET 2 S1 6 LEU A 63 THR A 68 1 SHEET 3 S1 6 GLY A 121 PRO A 127 1 SHEET 4 S1 6 ALA A 145 ASP A 149 1 SHEET 5 S1 6 SER A 158 PHE A 161 1 SHEET 6 S1 6 ASN A 316 LEU A 319 1 SHEET 1 S2 6 ALA A 214 GLU A 217 0 SHEET 2 S2 6 ILE A 182 ALA A 186 1 SHEET 3 S2 6 ALA A 241 VAL A 244 1 SHEET 4 S2 6 SER A 269 ASP A 274 1 SHEET 5 S2 6 THR A 287 LYS A 290 1 SHEET 6 S2 6 SER A 322 VAL A 324 -1 SHEET 1 S3 6 SER B 93 MET B 98 0 SHEET 2 S3 6 LEU B 63 THR B 68 1 SHEET 3 S3 6 GLY B 121 PRO B 127 1 SHEET 4 S3 6 ALA B 145 ASP B 149 1 SHEET 5 S3 6 SER B 158 PHE B 161 1 SHEET 6 S3 6 ASN B 316 LEU B 319 1 SHEET 1 S4 6 ALA B 214 GLU B 217 0 SHEET 2 S4 6 ILE B 182 ALA B 186 1 SHEET 3 S4 6 ALA B 241 VAL B 244 1 SHEET 4 S4 6 SER B 269 ASP B 274 1 SHEET 5 S4 6 THR B 287 LYS B 290 1 SHEET 6 S4 6 SER B 322 VAL B 324 -1 SHEET 1 S5 6 SER C 93 MET C 98 0 SHEET 2 S5 6 LEU C 63 THR C 68 1 SHEET 3 S5 6 GLY C 121 PRO C 127 1 SHEET 4 S5 6 ALA C 145 ASP C 149 1 SHEET 5 S5 6 SER C 158 PHE C 161 1 SHEET 6 S5 6 ASN C 316 LEU C 319 1 SHEET 1 S6 6 ALA C 214 GLU C 217 0 SHEET 2 S6 6 ILE C 182 ALA C 186 1 SHEET 3 S6 6 ALA C 241 VAL C 244 1 SHEET 4 S6 6 SER C 269 ASP C 274 1 SHEET 5 S6 6 THR C 287 LYS C 290 1 SHEET 6 S6 6 SER C 322 VAL C 324 -1 SHEET 1 S7 6 SER D 93 MET D 98 0 SHEET 2 S7 6 LEU D 63 THR D 68 1 SHEET 3 S7 6 GLY D 121 PRO D 127 1 SHEET 4 S7 6 ALA D 145 ASP D 149 1 SHEET 5 S7 6 SER D 158 PHE D 161 1 SHEET 6 S7 6 ASN D 316 LEU D 319 1 SHEET 1 S8 6 ALA D 214 GLU D 217 0 SHEET 2 S8 6 ILE D 182 ALA D 186 1 SHEET 3 S8 6 ALA D 241 VAL D 244 1 SHEET 4 S8 6 SER D 269 ASP D 274 1 SHEET 5 S8 6 THR D 287 LYS D 290 1 SHEET 6 S8 6 SER D 322 VAL D 324 -1 CISPEP 1 ILE A 283 PRO A 284 0 -0.53 CISPEP 2 ILE B 283 PRO B 284 0 -0.24 CISPEP 3 ILE C 283 PRO C 284 0 -0.25 CISPEP 4 ALA C 331 PRO C 332 0 -1.53 CISPEP 5 ILE D 283 PRO D 284 0 -0.25 CRYST1 90.160 64.730 117.940 90.00 91.75 90.00 P 1 21 1 8 ORIGX1 1.000000 0.000000 0.000000 0.00000 ORIGX2 0.000000 1.000000 0.000000 0.00000 ORIGX3 0.000000 0.000000 1.000000 0.00000 SCALE1 0.011091 0.000000 0.000339 0.00000 SCALE2 0.000000 0.015449 0.000000 0.00000 SCALE3 0.000000 0.000000 0.008483 0.00000