HEADER IMMUNE SYSTEM 13-OCT-98 1PSZ TITLE PNEUMOCOCCAL SURFACE ANTIGEN PSAA COMPND MOL_ID: 1; COMPND 2 MOLECULE: PROTEIN (SURFACE ANTIGEN PSAA); COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES; COMPND 5 MUTATION: YES; COMPND 6 OTHER_DETAILS: THE EXPRESSED CONSTRUCT LACKS THE PRO-LIPOPROTEIN COMPND 7 RECOGNITION SEQUENCE LXXC SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: STREPTOCOCCUS PNEUMONIAE; SOURCE 3 ORGANISM_TAXID: 1313; SOURCE 4 STRAIN: D39 (SEROTYPE 2); SOURCE 5 ATCC: NCTC7466; SOURCE 6 COLLECTION: NCTC7466; SOURCE 7 CELLULAR_LOCATION: EXTRACELLULAR; SOURCE 8 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 9 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 10 EXPRESSION_SYSTEM_STRAIN: SG12009 [PREP4]; SOURCE 11 EXPRESSION_SYSTEM_CELLULAR_LOCATION: CYTOPLASM; SOURCE 12 EXPRESSION_SYSTEM_VECTOR_TYPE: QIAEXPRESS; SOURCE 13 EXPRESSION_SYSTEM_VECTOR: PQE30 KEYWDS PSAA, ABC-TYPE BINDING PROTEIN, METAL-BINDING PROTEIN, PNEUMOCOCCAL KEYWDS 2 SURFACE ANTIGEN, IMMUNE SYSTEM EXPDTA X-RAY DIFFRACTION AUTHOR M.C.LAWRENCE,P.A.PILLING,V.C.EPA,A.M.BERRY,A.D.OGUNNIYI,J.C.PATON REVDAT 4 27-DEC-23 1PSZ 1 REMARK LINK REVDAT 3 04-APR-18 1PSZ 1 REMARK REVDAT 2 24-FEB-09 1PSZ 1 VERSN REVDAT 1 19-APR-00 1PSZ 0 JRNL AUTH M.C.LAWRENCE,P.A.PILLING,V.C.EPA,A.M.BERRY,A.D.OGUNNIYI, JRNL AUTH 2 J.C.PATON JRNL TITL THE CRYSTAL STRUCTURE OF PNEUMOCOCCAL SURFACE ANTIGEN PSAA JRNL TITL 2 REVEALS A METAL-BINDING SITE AND A NOVEL STRUCTURE FOR A JRNL TITL 3 PUTATIVE ABC-TYPE BINDING PROTEIN. JRNL REF STRUCTURE V. 6 1553 1998 JRNL REFN ISSN 0969-2126 JRNL PMID 9862808 JRNL DOI 10.1016/S0969-2126(98)00153-1 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH P.A.PILLING,M.C.LAWRENCE,A.M.BERRY,A.D.OGUNNIYI,R.A.LOCK, REMARK 1 AUTH 2 J.C.PATON REMARK 1 TITL EXPRESSION, PURIFICATION AND PRELIMINARY X-RAY REMARK 1 TITL 2 CRYSTALLOGRAPHIC ANALYSIS OF PSAA, A PUTATIVE REMARK 1 TITL 3 METAL-TRANSPORTER PROTEIN OF STREPTOCOCCUS PNUEMONIAE REMARK 1 REF ACTA CRYSTALLOGR.,SECT.D V. 54 1464 1998 REMARK 1 REFN ISSN 0907-4449 REMARK 2 REMARK 2 RESOLUTION. 2.00 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 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.00 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 8.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 3 NUMBER OF REFLECTIONS : 19029 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) : NULL REMARK 3 R VALUE (WORKING SET) : 0.178 REMARK 3 FREE R VALUE : 0.236 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT : 979 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2276 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 1 REMARK 3 SOLVENT ATOMS : 225 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 17.30 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 OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.200 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.180 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.110 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 3.900 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 DISTANCE RESTRAINTS. RMS SIGMA REMARK 3 BOND LENGTH (A) : 0.009 ; 0.020 REMARK 3 ANGLE DISTANCE (A) : 0.027 ; 0.040 REMARK 3 INTRAPLANAR 1-4 DISTANCE (A) : 0.029 ; 0.050 REMARK 3 H-BOND OR METAL COORDINATION (A) : NULL ; NULL REMARK 3 REMARK 3 PLANE RESTRAINT (A) : 0.022 ; NULL REMARK 3 CHIRAL-CENTER RESTRAINT (A**3) : 0.101 ; 0.150 REMARK 3 REMARK 3 NON-BONDED CONTACT RESTRAINTS. REMARK 3 SINGLE TORSION (A) : 0.179 ; 0.300 REMARK 3 MULTIPLE TORSION (A) : 0.253 ; 0.300 REMARK 3 H-BOND (X...Y) (A) : 0.126 ; 0.300 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) : 3.800 ; 7.000 REMARK 3 STAGGERED (DEGREES) : 18.800; 15.000 REMARK 3 TRANSVERSE (DEGREES) : 21.500; 20.000 REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : 1.260 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 1.944 ; 3.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 1.601 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 2.505 ; 3.000 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NO STEREOCHEMICAL CONSTRAINTS WERE REMARK 3 APPLIED TO THE ZINC ION DURING REFINEMENT REMARK 4 REMARK 4 1PSZ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 04-AUG-99. REMARK 100 THE DEPOSITION ID IS D_1000007242. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 15-JUN-97 REMARK 200 TEMPERATURE (KELVIN) : 108 REMARK 200 PH : 7.5 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 : MACSCIENCE M18X 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 : RIGAKU RAXIS IV REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 19354 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.000 REMARK 200 RESOLUTION RANGE LOW (A) : 20.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.5 REMARK 200 DATA REDUNDANCY : 3.700 REMARK 200 R MERGE (I) : 0.11000 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 12.4000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.00 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.05 REMARK 200 COMPLETENESS FOR SHELL (%) : 99.0 REMARK 200 DATA REDUNDANCY IN SHELL : 3.50 REMARK 200 R MERGE FOR SHELL (I) : 0.39000 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 3.400 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MIR REMARK 200 SOFTWARE USED: SHARP REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 40.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.05 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: CRYSTALS WERE GROWN BY MICRO OR REMARK 280 MACROSEEDING IN HANGING DROPS. PROTEIN CONCENTRATION 18 MG/ML. REMARK 280 PRECIPITANT 3.0 M K2HPO4/NAH2PO4 (PH 7.5) 0.1 M MES ( PH 6.5) REMARK 280 0.1 M GUHCL AT 18 DEGREES. 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 30.01200 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 34.91900 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 33.25850 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 34.91900 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 30.01200 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 33.25850 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 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 TRP A 7 REMARK 465 ARG A 8 REMARK 465 GLY A 9 REMARK 465 SER A 10 REMARK 465 HIS A 11 REMARK 465 HIS A 12 REMARK 465 HIS A 13 REMARK 465 HIS A 14 REMARK 465 HIS A 15 REMARK 465 HIS A 16 REMARK 465 GLY A 17 REMARK 465 SER A 18 REMARK 465 ALA A 19 REMARK 465 CYS A 20 REMARK 465 ALA A 21 REMARK 465 SER A 22 REMARK 465 GLY A 23 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 ALA A 82 O HOH A 595 2.15 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 ASP A 181 CB - CG - OD1 ANGL. DEV. = 6.1 DEGREES REMARK 500 GLU A 186 CA - CB - CG ANGL. DEV. = 16.4 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 ILE A 90 51.85 36.85 REMARK 500 GLU A 93 46.18 -83.77 REMARK 500 ALA A 98 64.69 65.60 REMARK 500 LYS A 113 -53.22 -132.46 REMARK 500 ASN A 131 11.05 -153.61 REMARK 500 HIS A 139 44.98 -77.30 REMARK 500 GLU A 228 -160.63 -71.48 REMARK 500 GLU A 230 35.13 -66.57 REMARK 500 THR A 279 -78.17 -120.88 REMARK 500 ASP A 290 42.50 -81.29 REMARK 500 REMARK 500 REMARK: NULL 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 ZN A1000 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 67 NE2 REMARK 620 2 HIS A 139 NE2 106.9 REMARK 620 3 GLU A 205 OE1 122.5 103.8 REMARK 620 4 GLU A 205 OE2 77.1 90.4 55.2 REMARK 620 5 ASP A 280 OD2 101.1 131.3 93.1 134.9 REMARK 620 N 1 2 3 4 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: ZN REMARK 800 EVIDENCE_CODE: AUTHOR REMARK 800 SITE_DESCRIPTION: THE IDENTITY OF THE BOUND METAL IS UNCERTAIN, REMARK 800 HOWEVER X-RAY REFINEMENT SUGGESTS THAT IT IS MOST LIKELY ZN+2 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 1000 REMARK 999 REMARK 999 SEQUENCE REMARK 999 THE DATABASE ENTRY HAS RESIDUES 1 TO 309 REMARK 999 THE CRYSTALLIZED PROTEIN HAS RESIDUES 20 TO 309 REMARK 999 PRECEDED BY A 13 RESIDUE PURIFICATION TAG REMARK 999 COORDINATES ARE PROVIDED FOR RESIDUES REMARK 999 24 TO 309 DBREF 1PSZ A 20 309 UNP P0A4G2 MTSA1_STRPN 20 309 SEQRES 1 A 303 TRP ARG GLY SER HIS HIS HIS HIS HIS HIS GLY SER ALA SEQRES 2 A 303 CYS ALA SER GLY LYS LYS ASP THR THR SER GLY GLN LYS SEQRES 3 A 303 LEU LYS VAL VAL ALA THR ASN SER ILE ILE ALA ASP ILE SEQRES 4 A 303 THR LYS ASN ILE ALA GLY ASP LYS ILE ASP LEU HIS SER SEQRES 5 A 303 ILE VAL PRO ILE GLY GLN ASP PRO HIS GLU TYR GLU PRO SEQRES 6 A 303 LEU PRO GLU ASP VAL LYS LYS THR SER GLU ALA ASP LEU SEQRES 7 A 303 ILE PHE TYR ASN GLY ILE ASN LEU GLU THR GLY GLY ASN SEQRES 8 A 303 ALA TRP PHE THR LYS LEU VAL GLU ASN ALA LYS LYS THR SEQRES 9 A 303 GLU ASN LYS ASP TYR PHE ALA VAL SER ASP GLY VAL ASP SEQRES 10 A 303 VAL ILE TYR LEU GLU GLY GLN ASN GLU LYS GLY LYS GLU SEQRES 11 A 303 ASP PRO HIS ALA TRP LEU ASN LEU GLU ASN GLY ILE ILE SEQRES 12 A 303 PHE ALA LYS ASN ILE ALA LYS GLN LEU SER ALA LYS ASP SEQRES 13 A 303 PRO ASN ASN LYS GLU PHE TYR GLU LYS ASN LEU LYS GLU SEQRES 14 A 303 TYR THR ASP LYS LEU ASP LYS LEU ASP LYS GLU SER LYS SEQRES 15 A 303 ASP LYS PHE ASN LYS ILE PRO ALA GLU LYS LYS LEU ILE SEQRES 16 A 303 VAL THR SER GLU GLY ALA PHE LYS TYR PHE SER LYS ALA SEQRES 17 A 303 TYR GLY VAL PRO SER ALA TYR ILE TRP GLU ILE ASN THR SEQRES 18 A 303 GLU GLU GLU GLY THR PRO GLU GLN ILE LYS THR LEU VAL SEQRES 19 A 303 GLU LYS LEU ARG GLN THR LYS VAL PRO SER LEU PHE VAL SEQRES 20 A 303 GLU SER SER VAL ASP ASP ARG PRO MET LYS THR VAL SER SEQRES 21 A 303 GLN ASP THR ASN ILE PRO ILE TYR ALA GLN ILE PHE THR SEQRES 22 A 303 ASP SER ILE ALA GLU GLN GLY LYS GLU GLY ASP SER TYR SEQRES 23 A 303 TYR SER MET MET LYS TYR ASN LEU ASP LYS ILE ALA GLU SEQRES 24 A 303 GLY LEU ALA LYS HET ZN A1000 1 HETNAM ZN ZINC ION FORMUL 2 ZN ZN 2+ FORMUL 3 HOH *225(H2 O) HELIX 1 A ASN A 39 ALA A 50 1 12 HELIX 2 B LEU A 72 ALA A 82 1 11 HELIX 3 C ALA A 98 ALA A 107 1 10 HELIX 4 D ASN A 143 ASP A 162 1 20 HELIX 5 DP ASN A 165 ASP A 189 1 25 HELIX 6 E PHE A 208 TYR A 215 1 8 HELIX 7 F THR A 232 ARG A 244 1 13 HELIX 8 G ASP A 259 ASN A 270 1 12 HELIX 9 H SER A 291 ALA A 308 1 18 SHEET 1 N 4 ASP A 55 ILE A 59 0 SHEET 2 N 4 LEU A 33 ALA A 37 1 O LEU A 33 N ASP A 55 SHEET 3 N 4 LEU A 84 TYR A 87 1 N LEU A 84 O LYS A 34 SHEET 4 N 4 ASP A 114 VAL A 118 1 O ASP A 114 N ILE A 85 SHEET 1 C1 2 ILE A 201 GLY A 206 0 SHEET 2 C1 2 PRO A 218 TRP A 223 1 O PRO A 218 N ILE A 201 SHEET 1 C2 2 LEU A 251 SER A 255 0 SHEET 2 C2 2 PRO A 272 ILE A 277 1 O PRO A 272 N LEU A 251 LINK NE2 HIS A 67 ZN ZN A1000 1555 1555 2.00 LINK NE2 HIS A 139 ZN ZN A1000 1555 1555 2.01 LINK OE1 GLU A 205 ZN ZN A1000 1555 1555 2.05 LINK OE2 GLU A 205 ZN ZN A1000 1555 1555 2.60 LINK OD2 ASP A 280 ZN ZN A1000 1555 1555 2.03 SITE 1 ZN 4 HIS A 67 HIS A 139 GLU A 205 ASP A 280 SITE 1 AC1 4 HIS A 67 HIS A 139 GLU A 205 ASP A 280 CRYST1 60.024 66.517 69.838 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 0.016660 0.000000 0.000000 0.00000 SCALE2 0.000000 0.015034 0.000000 0.00000 SCALE3 0.000000 0.000000 0.014319 0.00000