HEADER VIRAL PROTEIN 01-JUN-05 1ZVB TITLE A STRUCTURE-BASED MECHANISM OF SARS VIRUS MEMBRANE FUSION COMPND MOL_ID: 1; COMPND 2 MOLECULE: E2 GLYCOPROTEIN; COMPND 3 CHAIN: A, B, C; COMPND 4 FRAGMENT: RESIDUES 940-973; COMPND 5 SYNONYM: SPIKE GLYCOPROTEIN, PEPLOMER PROTEIN; COMPND 6 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: SARS CORONAVIRUS; SOURCE 3 ORGANISM_TAXID: 227859; SOURCE 4 STRAIN: SARS; SOURCE 5 GENE: S; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21/PLYSIS; SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PN34 KEYWDS SARS CORONAVIRUS, MEMBRANE FUSION, S2, VIRUS ENTRY, COILED COILS, KEYWDS 2 CONFORMATIONAL CHANGE, VIRAL PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR Y.DENG,J.LIU,Q.ZHENG,W.YONG,J.DAI,M.LU REVDAT 5 23-AUG-23 1ZVB 1 REMARK REVDAT 4 13-JUL-11 1ZVB 1 VERSN REVDAT 3 24-FEB-09 1ZVB 1 VERSN REVDAT 2 30-MAY-06 1ZVB 1 JRNL REVDAT 1 16-MAY-06 1ZVB 0 JRNL AUTH Y.DENG,J.LIU,Q.ZHENG,W.YONG,M.LU JRNL TITL STRUCTURES AND POLYMORPHIC INTERACTIONS OF TWO HEPTAD-REPEAT JRNL TITL 2 REGIONS OF THE SARS VIRUS S2 PROTEIN. JRNL REF STRUCTURE V. 14 889 2006 JRNL REFN ISSN 0969-2126 JRNL PMID 16698550 JRNL DOI 10.1016/J.STR.2006.03.007 REMARK 2 REMARK 2 RESOLUTION. 1.70 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.2.0003 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) : 1.70 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 51.60 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 96.8 REMARK 3 NUMBER OF REFLECTIONS : 11230 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) : 0.196 REMARK 3 R VALUE (WORKING SET) : 0.194 REMARK 3 FREE R VALUE : 0.239 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.800 REMARK 3 FREE R VALUE TEST SET COUNT : 535 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) : 1.70 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.74 REMARK 3 REFLECTION IN BIN (WORKING SET) : 727 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 93.30 REMARK 3 BIN R VALUE (WORKING SET) : 0.1890 REMARK 3 BIN FREE R VALUE SET COUNT : 36 REMARK 3 BIN FREE R VALUE : 0.2790 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 763 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 0 REMARK 3 SOLVENT ATOMS : 99 REMARK 3 REMARK 3 B VALUES. REMARK 3 B VALUE TYPE : LIKELY RESIDUAL REMARK 3 FROM WILSON PLOT (A**2) : 24.00 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 18.43 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 1.09000 REMARK 3 B22 (A**2) : -0.42000 REMARK 3 B33 (A**2) : -0.61000 REMARK 3 B12 (A**2) : 0.00000 REMARK 3 B13 (A**2) : 0.50000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.117 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.119 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.069 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 2.009 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.940 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.920 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 763 ; 0.014 ; 0.022 REMARK 3 BOND LENGTHS OTHERS (A): NULL ; NULL ; NULL REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 1028 ; 1.312 ; 1.997 REMARK 3 BOND ANGLES OTHERS (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 98 ; 2.755 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 30 ;29.225 ;27.000 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 3 ;13.975 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 137 ; 0.085 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 536 ; 0.006 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 355 ; 0.205 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): 553 ; 0.298 ; 0.200 REMARK 3 NON-BONDED TORSION OTHERS (A): NULL ; NULL ; NULL REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 53 ; 0.156 ; 0.200 REMARK 3 H-BOND (X...Y) OTHERS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY VDW REFINED ATOMS (A): 22 ; 0.158 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 11 ; 0.208 ; 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): 502 ; 0.773 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 806 ; 1.562 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 261 ; 2.731 ; 3.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 222 ; 4.221 ; 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): NULL ; NULL ; NULL REMARK 3 SPHERICITY; FREE ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; BONDED ATOMS (A**2): NULL ; NULL ; NULL 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 : 3 REMARK 3 REMARK 3 TLS GROUP : 1 REMARK 3 NUMBER OF COMPONENTS GROUP : 1 REMARK 3 COMPONENTS C SSSEQI TO C SSSEQI REMARK 3 RESIDUE RANGE : A 1 A 34 REMARK 3 ORIGIN FOR THE GROUP (A): 13.9200 3.3240 26.0680 REMARK 3 T TENSOR REMARK 3 T11: 0.0112 T22: 0.0433 REMARK 3 T33: 0.0308 T12: 0.0129 REMARK 3 T13: -0.0090 T23: -0.0131 REMARK 3 L TENSOR REMARK 3 L11: 0.9714 L22: 2.0816 REMARK 3 L33: 21.7805 L12: 0.2623 REMARK 3 L13: -1.3511 L23: -3.9296 REMARK 3 S TENSOR REMARK 3 S11: -0.0701 S12: -0.0499 S13: 0.0035 REMARK 3 S21: 0.0716 S22: -0.0133 S23: -0.0679 REMARK 3 S31: 0.0689 S32: 0.3732 S33: 0.0833 REMARK 3 REMARK 3 TLS GROUP : 2 REMARK 3 NUMBER OF COMPONENTS GROUP : 1 REMARK 3 COMPONENTS C SSSEQI TO C SSSEQI REMARK 3 RESIDUE RANGE : B 2 B 34 REMARK 3 ORIGIN FOR THE GROUP (A): 5.8910 9.3630 26.5740 REMARK 3 T TENSOR REMARK 3 T11: 0.0186 T22: 0.0306 REMARK 3 T33: 0.0420 T12: 0.0016 REMARK 3 T13: 0.0107 T23: 0.0074 REMARK 3 L TENSOR REMARK 3 L11: 2.4733 L22: 0.7688 REMARK 3 L33: 19.1960 L12: 0.2292 REMARK 3 L13: 4.9335 L23: 0.6530 REMARK 3 S TENSOR REMARK 3 S11: -0.0495 S12: -0.0172 S13: 0.0914 REMARK 3 S21: 0.0114 S22: -0.0395 S23: 0.0518 REMARK 3 S31: -0.3735 S32: -0.1915 S33: 0.0891 REMARK 3 REMARK 3 TLS GROUP : 3 REMARK 3 NUMBER OF COMPONENTS GROUP : 1 REMARK 3 COMPONENTS C SSSEQI TO C SSSEQI REMARK 3 RESIDUE RANGE : C 1 C 34 REMARK 3 ORIGIN FOR THE GROUP (A): 4.5830 -0.7240 26.1630 REMARK 3 T TENSOR REMARK 3 T11: 0.0086 T22: 0.0382 REMARK 3 T33: 0.0452 T12: -0.0005 REMARK 3 T13: -0.0085 T23: 0.0182 REMARK 3 L TENSOR REMARK 3 L11: 1.7825 L22: 1.8259 REMARK 3 L33: 18.1368 L12: -0.4154 REMARK 3 L13: -2.2250 L23: 3.4473 REMARK 3 S TENSOR REMARK 3 S11: -0.0148 S12: -0.0414 S13: -0.0727 REMARK 3 S21: 0.0396 S22: -0.0492 S23: 0.0217 REMARK 3 S31: 0.3297 S32: -0.2778 S33: 0.0640 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : 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 1ZVB COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 15-JUN-05. REMARK 100 THE DEPOSITION ID IS D_1000033162. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 13-SEP-04 REMARK 200 TEMPERATURE (KELVIN) : 100.0 REMARK 200 PH : 5.00 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : NSLS REMARK 200 BEAMLINE : X4A REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.9788 REMARK 200 MONOCHROMATOR : GRAPHITE REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 4 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 11231 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.700 REMARK 200 RESOLUTION RANGE LOW (A) : 51.600 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 96.9 REMARK 200 DATA REDUNDANCY : 2.900 REMARK 200 R MERGE (I) : 0.03600 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 21.1000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.70 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.76 REMARK 200 COMPLETENESS FOR SHELL (%) : 94.7 REMARK 200 DATA REDUNDANCY IN SHELL : 2.60 REMARK 200 R MERGE FOR SHELL (I) : 0.21000 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : 5.100 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 1ZV8 REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 45.90 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.30 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 4000, ISOPROPANOL, SODIUM CITRATE, REMARK 280 PH 5.00, VAPOR DIFFUSION, HANGING DROP, 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 29.45400 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 17.20250 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 4 -1.000000 0.000000 0.000000 29.45400 REMARK 290 SMTRY2 4 0.000000 1.000000 0.000000 17.20250 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 300 REMARK: THE BIOLOGICAL ASSEMBLY IS A TRIMER REMARK 350 REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS REMARK 350 GIVEN BELOW. BOTH NON-CRYSTALLOGRAPHIC AND REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN. REMARK 350 REMARK 350 BIOMOLECULE: 1 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: TRIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TRIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 3500 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 6100 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -38.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C 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 ALA B 1 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1ZV7 RELATED DB: PDB REMARK 900 STRUCTURE OF SARS CORONAVIRUS SPIKE PROTEIN REMARK 900 RELATED ID: 1ZV8 RELATED DB: PDB REMARK 900 STRUCTURE OF SARS CORONAVIRUS SPIKE PROTEIN REMARK 900 RELATED ID: 1ZVA RELATED DB: PDB REMARK 900 STRUCTURE OF SARS CORONAVIRUS SPIKE PROTEIN DBREF 1ZVB A 1 34 UNP P59594 SPIKE_CVHSA 940 973 DBREF 1ZVB B 1 34 UNP P59594 SPIKE_CVHSA 940 973 DBREF 1ZVB C 1 34 UNP P59594 SPIKE_CVHSA 940 973 SEQRES 1 A 34 ALA LEU ASN THR LEU VAL LYS GLN LEU SER SER ASN PHE SEQRES 2 A 34 GLY ALA ILE SER SER VAL LEU ASN ASP ILE LEU SER ARG SEQRES 3 A 34 LEU ASP LYS VAL GLU ALA GLU VAL SEQRES 1 B 34 ALA LEU ASN THR LEU VAL LYS GLN LEU SER SER ASN PHE SEQRES 2 B 34 GLY ALA ILE SER SER VAL LEU ASN ASP ILE LEU SER ARG SEQRES 3 B 34 LEU ASP LYS VAL GLU ALA GLU VAL SEQRES 1 C 34 ALA LEU ASN THR LEU VAL LYS GLN LEU SER SER ASN PHE SEQRES 2 C 34 GLY ALA ILE SER SER VAL LEU ASN ASP ILE LEU SER ARG SEQRES 3 C 34 LEU ASP LYS VAL GLU ALA GLU VAL FORMUL 4 HOH *99(H2 O) HELIX 1 1 ALA A 1 ALA A 32 1 32 HELIX 2 2 LEU B 2 VAL B 34 1 33 HELIX 3 3 ALA C 1 ALA C 32 1 32 CRYST1 58.908 34.405 51.718 90.00 93.91 90.00 C 1 2 1 12 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 0.016976 0.000000 0.001160 0.00000 SCALE2 0.000000 0.029066 0.000000 0.00000 SCALE3 0.000000 0.000000 0.019381 0.00000