HEADER ASPARTIC PROTEASE 15-JUL-98 4FIV TITLE FIV PROTEASE COMPLEXED WITH AN INHIBITOR LP-130 COMPND MOL_ID: 1; COMPND 2 MOLECULE: FELINE IMMUNODEFICIENCY VIRUS PROTEASE; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: FIV PR, RETROPEPSIN; COMPND 5 EC: 3.4.23.16; COMPND 6 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: FELINE IMMUNODEFICIENCY VIRUS; SOURCE 3 ORGANISM_TAXID: 11673; SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 5 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 6 EXPRESSION_SYSTEM_STRAIN: PETALUMA KEYWDS ASPARTIC PROTEASE, FIV, RETROPEPSIN, RETROVIRUS, CAT EXPDTA X-RAY DIFFRACTION AUTHOR J.KERVINEN,J.LUBKOWSKI,A.ZDANOV,A.WLODAWER,A.GUSTCHINA REVDAT 4 09-AUG-23 4FIV 1 REMARK REVDAT 3 13-JUL-11 4FIV 1 VERSN REVDAT 2 24-FEB-09 4FIV 1 VERSN REVDAT 1 13-JAN-99 4FIV 0 JRNL AUTH J.KERVINEN,J.LUBKOWSKI,A.ZDANOV,D.BHATT,B.M.DUNN,K.Y.HUI, JRNL AUTH 2 D.J.POWELL,J.KAY,A.WLODAWER,A.GUSTCHINA JRNL TITL TOWARD A UNIVERSAL INHIBITOR OF RETROVIRAL PROTEASES: JRNL TITL 2 COMPARATIVE ANALYSIS OF THE INTERACTIONS OF LP-130 COMPLEXED JRNL TITL 3 WITH PROTEASES FROM HIV-1, FIV, AND EIAV. JRNL REF PROTEIN SCI. V. 7 2314 1998 JRNL REFN ISSN 0961-8368 JRNL PMID 9827997 REMARK 2 REMARK 2 RESOLUTION. 1.80 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PROFFT REMARK 3 AUTHORS : KONNERT,HENDRICKSON,FINZEL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.80 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 10.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 3.000 REMARK 3 COMPLETENESS FOR RANGE (%) : NULL REMARK 3 NUMBER OF REFLECTIONS : 9085 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 + TEST SET) : NULL REMARK 3 R VALUE (WORKING SET) : 0.149 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 REMARK 3 FIT/AGREEMENT OF MODEL WITH ALL DATA. REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : NULL REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : NULL REMARK 3 FREE R VALUE (NO CUTOFF) : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL REMARK 3 FREE R VALUE TEST SET COUNT (NO CUTOFF) : NULL REMARK 3 TOTAL NUMBER OF REFLECTIONS (NO CUTOFF) : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 891 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 58 REMARK 3 SOLVENT ATOMS : 92 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 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 DISTANCE RESTRAINTS. RMS SIGMA REMARK 3 BOND LENGTH (A) : 0.014 ; 0.017 REMARK 3 ANGLE DISTANCE (A) : 0.046 ; 0.041 REMARK 3 INTRAPLANAR 1-4 DISTANCE (A) : 0.048 ; 0.057 REMARK 3 H-BOND OR METAL COORDINATION (A) : NULL ; NULL REMARK 3 REMARK 3 PLANE RESTRAINT (A) : 0.017 ; 0.022 REMARK 3 CHIRAL-CENTER RESTRAINT (A**3) : 0.175 ; 0.180 REMARK 3 REMARK 3 NON-BONDED CONTACT RESTRAINTS. REMARK 3 SINGLE TORSION (A) : 0.221 ; 0.500 REMARK 3 MULTIPLE TORSION (A) : 0.234 ; 0.500 REMARK 3 H-BOND (X...Y) (A) : 0.253 ; 0.500 REMARK 3 H-BOND (X-H...Y) (A) : NULL ; NULL REMARK 3 REMARK 3 CONFORMATIONAL TORSION ANGLE RESTRAINTS. REMARK 3 SPECIFIED (DEGREES) : NULL ; NULL REMARK 3 PLANAR (DEGREES) : 3.400 ; 3.400 REMARK 3 STAGGERED (DEGREES) : 16.400; 13.000 REMARK 3 TRANSVERSE (DEGREES) : 39.700; 20.000 REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : 1.967 ; 2.400 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 2.633 ; 3.300 REMARK 3 SIDE-CHAIN BOND (A**2) : 3.932 ; 3.700 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 5.316 ; 6.400 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 4FIV 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_1000179318. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 02-SEP-94 REMARK 200 TEMPERATURE (KELVIN) : 293 REMARK 200 PH : 7.2 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : ROTATING ANODE REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : RIGAKU RUH2R REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : MIRRORS REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : MAR SCANNER 345 MM PLATE REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 9993 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.800 REMARK 200 RESOLUTION RANGE LOW (A) : 40.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 92.3 REMARK 200 DATA REDUNDANCY : 3.500 REMARK 200 R MERGE (I) : 0.09200 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : NULL REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.80 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.83 REMARK 200 COMPLETENESS FOR SHELL (%) : 85.4 REMARK 200 DATA REDUNDANCY IN SHELL : 3.40 REMARK 200 R MERGE FOR SHELL (I) : 0.27300 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: RIGID BODY REFINEMENT REMARK 200 SOFTWARE USED: X-PLOR REMARK 200 STARTING MODEL: PDB ENTRY 1FIV REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 43.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.15 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PH 7.2 REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 31 2 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z+1/3 REMARK 290 3555 -X+Y,-X,Z+2/3 REMARK 290 4555 Y,X,-Z REMARK 290 5555 X-Y,-Y,-Z+2/3 REMARK 290 6555 -X,-X+Y,-Z+1/3 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 24.83333 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 49.66667 REMARK 290 SMTRY1 4 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 4 0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 5 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 5 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 49.66667 REMARK 290 SMTRY1 6 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 6 -0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 24.83333 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 AUTHORS NOTE THAT THIS MOLECULE IS ACTIVE AS DIMER 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: DIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA,PQS REMARK 350 TOTAL BURIED SURFACE AREA: 6710 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 9470 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -53.0 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 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 49.66667 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 ARG A 64 CG CD NE CZ NH1 NH2 REMARK 470 GLU A 78 CD OE1 OE2 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT REMARK 500 REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT. REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI DISTANCE REMARK 500 O VAL A 4 N THR A 6 2.12 REMARK 500 REMARK 500 REMARK: NULL 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 13 NE - CZ - NH1 ANGL. DEV. = -3.1 DEGREES REMARK 500 ASP A 34 CB - CG - OD2 ANGL. DEV. = -7.9 DEGREES REMARK 500 ARG A 40 NE - CZ - NH2 ANGL. DEV. = 3.4 DEGREES REMARK 500 GLU A 50 CA - CB - CG ANGL. DEV. = 17.0 DEGREES REMARK 500 GLY A 61 CA - C - N ANGL. DEV. = 12.1 DEGREES REMARK 500 GLY A 61 O - C - N ANGL. DEV. = -13.0 DEGREES REMARK 500 GLY A 62 C - N - CA ANGL. DEV. = 14.9 DEGREES REMARK 500 ARG A 76 CD - NE - CZ ANGL. DEV. = 8.8 DEGREES REMARK 500 ARG A 76 NE - CZ - NH1 ANGL. DEV. = 3.1 DEGREES REMARK 500 ARG A 76 NE - CZ - NH2 ANGL. DEV. = -6.4 DEGREES REMARK 500 CYS A 84 CA - CB - SG ANGL. DEV. = 9.1 DEGREES REMARK 500 ARG A 104 NH1 - CZ - NH2 ANGL. DEV. = -7.6 DEGREES REMARK 500 ARG A 104 NE - CZ - NH2 ANGL. DEV. = 9.4 DEGREES REMARK 500 ARG A 113 CD - NE - CZ ANGL. DEV. = 50.5 DEGREES REMARK 500 ARG A 113 NE - CZ - NH1 ANGL. DEV. = 3.1 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 LYS A 46 -129.54 51.95 REMARK 500 REMARK 500 REMARK: NULL REMARK 600 REMARK 600 HETEROGEN REMARK 600 REMARK 600 THE INHIBITOR LP-130 (1NI 201) IS TWO-FOLD DISORDERED, REMARK 600 SO THE TWO ORIENTATIONS FALL ON TOP OF EACH OTHER. REMARK 600 SOME ATOMS RELATED BY CRYSTALLOGRAPHIC SYMMETRY MAY BE REMARK 600 IN CLOSE CONTACT. REMARK 600 THE ALTERNATE LOCATION INDICATOR A HAS BEEN ASSIGNED TO REMARK 600 THE DISORDERED INHIBITOR SO THAT THESE ATOMS WOULD NOT BE REMARK 600 LISTED AS CLOSE CONTACTS. REMARK 650 REMARK 650 HELIX REMARK 650 DETERMINATION METHOD: TAKEN FROM RELEASED PDB ENTRY 1FIV REMARK 700 REMARK 700 SHEET REMARK 700 DETERMINATION METHOD: TAKEN FROM RELEASED PDB ENTRY 1FIV REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE LP1 A 201 DBREF 4FIV A 4 116 UNP P16088 POL_FIVPE 42 154 SEQRES 1 A 113 VAL GLY THR THR THR THR LEU GLU LYS ARG PRO GLU ILE SEQRES 2 A 113 LEU ILE PHE VAL ASN GLY TYR PRO ILE LYS PHE LEU LEU SEQRES 3 A 113 ASP THR GLY ALA ASP ILE THR ILE LEU ASN ARG ARG ASP SEQRES 4 A 113 PHE GLN VAL LYS ASN SER ILE GLU ASN GLY ARG GLN ASN SEQRES 5 A 113 MET ILE GLY VAL GLY GLY GLY LYS ARG GLY THR ASN TYR SEQRES 6 A 113 ILE ASN VAL HIS LEU GLU ILE ARG ASP GLU ASN TYR LYS SEQRES 7 A 113 THR GLN CYS ILE PHE GLY ASN VAL CYS VAL LEU GLU ASP SEQRES 8 A 113 ASN SER LEU ILE GLN PRO LEU LEU GLY ARG ASP ASN MET SEQRES 9 A 113 ILE LYS PHE ASN ILE ARG LEU VAL MET HET LP1 A 201 58 HETNAM LP1 4-[2-(2-ACETYLAMINO-3-NAPHTALEN-1-YL-PROPIONYLAMINO)-4- HETNAM 2 LP1 METHYL-PENTANOYLAMINO]-3-HYDROXY-6-METHYL-HEPTANOIC HETNAM 3 LP1 ACID [1-(1-CARBAMOYL-2-NAPHTHALEN-1-YL- HETNAM 4 LP1 ETHYLCARBAMOYL)-PROPYL]-AMIDE FORMUL 2 LP1 C45 H58 N6 O7 FORMUL 3 HOH *92(H2 O) HELIX 1 1 ARG A 40 ASP A 42 5 3 HELIX 2 2 ARG A 104 LYS A 109 1 6 SHEET 1 A 4 TYR A 23 LEU A 28 0 SHEET 2 A 4 GLU A 15 VAL A 20 -1 N VAL A 20 O TYR A 23 SHEET 3 A 4 VAL A 71 ILE A 75 -1 N GLU A 74 O PHE A 19 SHEET 4 A 4 CYS A 84 GLY A 87 -1 N GLY A 87 O VAL A 71 SHEET 1 B 4 ILE A 37 ASN A 39 0 SHEET 2 B 4 VAL A 89 LEU A 92 1 N CYS A 90 O LEU A 38 SHEET 3 B 4 GLY A 62 TYR A 68 -1 N TYR A 68 O VAL A 89 SHEET 4 B 4 ARG A 53 ILE A 57 -1 N MET A 56 O LYS A 63 SITE 1 AC1 18 ARG A 13 PHE A 19 GLY A 22 PRO A 24 SITE 2 AC1 18 LEU A 28 ASP A 30 GLY A 32 ALA A 33 SITE 3 AC1 18 ASP A 34 MET A 56 ILE A 57 GLY A 58 SITE 4 AC1 18 VAL A 59 ILE A 98 GLN A 99 LEU A 101 SITE 5 AC1 18 HOH A 301 HOH A 385 CRYST1 50.650 50.650 74.500 90.00 90.00 120.00 P 31 2 1 6 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 0.019743 0.011399 0.000000 0.00000 SCALE2 0.000000 0.022798 0.000000 0.00000 SCALE3 0.000000 0.000000 0.013423 0.00000