HEADER HYDROLASE 22-NOV-03 1RKP TITLE CRYSTAL STRUCTURE OF PDE5A1-IBMX COMPND MOL_ID: 1; COMPND 2 MOLECULE: CGMP-SPECIFIC 3',5'-CYCLIC PHOSPHODIESTERASE; COMPND 3 CHAIN: A; COMPND 4 FRAGMENT: CATALYTIC DOMAIN (RESIDUES 535-860); COMPND 5 SYNONYM: CGB-PDE, CGMP-BINDING CGMP-SPECIFIC PHOSPHODIESTERASE; COMPND 6 EC: 3.1.4.17; COMPND 7 ENGINEERED: YES; COMPND 8 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: PDE5A, PDE5, PDE5A1; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21(CODONPLUS); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET15B KEYWDS PDE5A, VIAGRA, IBMX, HYDROLASE EXPDTA X-RAY DIFFRACTION AUTHOR Q.HUAI,Y.LIU,S.H.FRANCIS,J.D.CORBIN,H.KE REVDAT 6 03-APR-24 1RKP 1 REMARK REVDAT 5 14-FEB-24 1RKP 1 REMARK REVDAT 4 27-OCT-21 1RKP 1 REMARK SEQADV LINK REVDAT 3 31-JAN-18 1RKP 1 REMARK REVDAT 2 24-FEB-09 1RKP 1 VERSN REVDAT 1 30-MAR-04 1RKP 0 JRNL AUTH Q.HUAI,Y.LIU,S.H.FRANCIS,J.D.CORBIN,H.KE JRNL TITL CRYSTAL STRUCTURES OF PHOSPHODIESTERASES 4 AND 5 IN COMPLEX JRNL TITL 2 WITH INHIBITOR IBMX SUGGEST A CONFORMATION DETERMINANT OF JRNL TITL 3 INHIBITOR SELECTIVITY JRNL REF J.BIOL.CHEM. V. 279 13095 2004 JRNL REFN ISSN 0021-9258 JRNL PMID 14668322 JRNL DOI 10.1074/JBC.M311556200 REMARK 2 REMARK 2 RESOLUTION. 2.05 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 1.0 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) : 2.05 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 100.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 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 : 25797 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 SET) : 0.220 REMARK 3 FREE R VALUE : 0.243 REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : 2582 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 : 2522 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 18 REMARK 3 SOLVENT ATOMS : 133 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 36.60 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) : 0.006 REMARK 3 BOND ANGLES (DEGREES) : 1.200 REMARK 3 DIHEDRAL ANGLES (DEGREES) : NULL REMARK 3 IMPROPER ANGLES (DEGREES) : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : ISOTROPIC 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: NULL REMARK 4 REMARK 4 1RKP COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 24-NOV-03. REMARK 100 THE DEPOSITION ID IS D_1000020843. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : NSLS REMARK 200 BEAMLINE : X25 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.0 REMARK 200 MONOCHROMATOR : MIRROR REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : NULL REMARK 200 DETECTOR MANUFACTURER : NULL REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 27018 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.050 REMARK 200 RESOLUTION RANGE LOW (A) : 100.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 200 DATA REDUNDANCY : 7.800 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.06300 REMARK 200 FOR THE DATA SET : 13.4000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.05 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.12 REMARK 200 COMPLETENESS FOR SHELL (%) : 100.0 REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : 0.47500 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 4.900 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: AMORE REMARK 200 STARTING MODEL: PDE4D2 REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 55.35 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.75 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 0.1M TRIS-HCL, 17% PEG 3350, 0.2M REMARK 280 MGSO4, PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 100K 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 43.37733 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 86.75467 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 86.75467 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 43.37733 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 GLU A 793 REMARK 465 ARG A 794 REMARK 465 LYS A 795 REMARK 465 GLU A 796 REMARK 465 LEU A 797 REMARK 465 ASN A 798 REMARK 465 ILE A 799 REMARK 465 GLU A 800 REMARK 465 PRO A 801 REMARK 465 THR A 802 REMARK 465 ASP A 803 REMARK 465 LEU A 804 REMARK 465 MET A 805 REMARK 465 ASN A 806 REMARK 465 ARG A 807 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 PRO A 671 C - N - CA ANGL. DEV. = 10.4 DEGREES REMARK 500 PRO A 671 C - N - CD ANGL. DEV. = -14.7 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 GLN A 589 59.41 37.96 REMARK 500 LYS A 630 -86.93 -81.95 REMARK 500 HIS A 670 76.07 -53.08 REMARK 500 PRO A 671 -86.50 22.35 REMARK 500 LEU A 672 28.71 -71.48 REMARK 500 TYR A 676 -82.39 -72.02 REMARK 500 ASP A 791 23.49 159.14 REMARK 500 GLN A 859 111.05 77.68 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 A 501 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH A 1 O REMARK 620 2 HOH A 2 O 72.9 REMARK 620 3 HIS A 617 NE2 92.6 164.6 REMARK 620 4 HIS A 653 NE2 167.4 95.5 98.5 REMARK 620 5 ASP A 654 OD2 99.8 93.3 94.2 85.4 REMARK 620 6 ASP A 764 OD1 87.8 85.2 89.4 86.4 171.4 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 MG A 502 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH A 2 O REMARK 620 2 HOH A 3 O 164.8 REMARK 620 3 HOH A 4 O 81.9 86.2 REMARK 620 4 HOH A 5 O 93.3 95.5 86.4 REMARK 620 5 HOH A 6 O 82.3 87.3 86.2 171.9 REMARK 620 6 ASP A 654 OD1 102.0 90.8 172.9 87.4 100.2 REMARK 620 N 1 2 3 4 5 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 501 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 502 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE IBM A 201 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1RKO RELATED DB: PDB REMARK 900 PDE4D2-IBMX DBREF 1RKP A 535 860 UNP O76074 PDE5A_HUMAN 535 860 SEQADV 1RKP LEU A 778 UNP O76074 ILE 778 ENGINEERED MUTATION SEQRES 1 A 326 GLU GLU THR ARG GLU LEU GLN SER LEU ALA ALA ALA VAL SEQRES 2 A 326 VAL PRO SER ALA GLN THR LEU LYS ILE THR ASP PHE SER SEQRES 3 A 326 PHE SER ASP PHE GLU LEU SER ASP LEU GLU THR ALA LEU SEQRES 4 A 326 CYS THR ILE ARG MET PHE THR ASP LEU ASN LEU VAL GLN SEQRES 5 A 326 ASN PHE GLN MET LYS HIS GLU VAL LEU CYS ARG TRP ILE SEQRES 6 A 326 LEU SER VAL LYS LYS ASN TYR ARG LYS ASN VAL ALA TYR SEQRES 7 A 326 HIS ASN TRP ARG HIS ALA PHE ASN THR ALA GLN CYS MET SEQRES 8 A 326 PHE ALA ALA LEU LYS ALA GLY LYS ILE GLN ASN LYS LEU SEQRES 9 A 326 THR ASP LEU GLU ILE LEU ALA LEU LEU ILE ALA ALA LEU SEQRES 10 A 326 SER HIS ASP LEU ASP HIS ARG GLY VAL ASN ASN SER TYR SEQRES 11 A 326 ILE GLN ARG SER GLU HIS PRO LEU ALA GLN LEU TYR CYS SEQRES 12 A 326 HIS SER ILE MET GLU HIS HIS HIS PHE ASP GLN CYS LEU SEQRES 13 A 326 MET ILE LEU ASN SER PRO GLY ASN GLN ILE LEU SER GLY SEQRES 14 A 326 LEU SER ILE GLU GLU TYR LYS THR THR LEU LYS ILE ILE SEQRES 15 A 326 LYS GLN ALA ILE LEU ALA THR ASP LEU ALA LEU TYR ILE SEQRES 16 A 326 LYS ARG ARG GLY GLU PHE PHE GLU LEU ILE ARG LYS ASN SEQRES 17 A 326 GLN PHE ASN LEU GLU ASP PRO HIS GLN LYS GLU LEU PHE SEQRES 18 A 326 LEU ALA MET LEU MET THR ALA CYS ASP LEU SER ALA ILE SEQRES 19 A 326 THR LYS PRO TRP PRO ILE GLN GLN ARG LEU ALA GLU LEU SEQRES 20 A 326 VAL ALA THR GLU PHE PHE ASP GLN GLY ASP ARG GLU ARG SEQRES 21 A 326 LYS GLU LEU ASN ILE GLU PRO THR ASP LEU MET ASN ARG SEQRES 22 A 326 GLU LYS LYS ASN LYS ILE PRO SER MET GLN VAL GLY PHE SEQRES 23 A 326 ILE ASP ALA ILE CYS LEU GLN LEU TYR GLU ALA LEU THR SEQRES 24 A 326 HIS VAL SER GLU ASP CYS PHE PRO LEU LEU ASP GLY CYS SEQRES 25 A 326 ARG LYS ASN ARG GLN LYS TRP GLN ALA LEU ALA GLU GLN SEQRES 26 A 326 GLN HET ZN A 501 1 HET MG A 502 1 HET IBM A 201 16 HETNAM ZN ZINC ION HETNAM MG MAGNESIUM ION HETNAM IBM 3-ISOBUTYL-1-METHYLXANTHINE FORMUL 2 ZN ZN 2+ FORMUL 3 MG MG 2+ FORMUL 4 IBM C10 H14 N4 O2 FORMUL 5 HOH *133(H2 O) HELIX 1 1 GLU A 535 ALA A 546 1 12 HELIX 2 2 SER A 550 LYS A 555 1 6 HELIX 3 3 SER A 567 LEU A 582 1 16 HELIX 4 4 ASN A 583 PHE A 588 1 6 HELIX 5 5 LYS A 591 ASN A 605 1 15 HELIX 6 6 ASN A 614 LYS A 630 1 17 HELIX 7 7 ILE A 634 LEU A 638 5 5 HELIX 8 8 THR A 639 HIS A 653 1 15 HELIX 9 9 SER A 663 SER A 668 1 6 HELIX 10 10 LEU A 672 CYS A 677 1 6 HELIX 11 11 SER A 679 SER A 695 1 17 HELIX 12 12 SER A 705 THR A 723 1 19 HELIX 13 13 ASP A 724 LYS A 741 1 18 HELIX 14 14 ASP A 748 LEU A 765 1 18 HELIX 15 15 SER A 766 LYS A 770 5 5 HELIX 16 16 PRO A 771 ASP A 788 1 18 HELIX 17 17 ASN A 811 ILE A 824 1 14 HELIX 18 18 ILE A 824 SER A 836 1 13 HELIX 19 19 CYS A 839 GLU A 858 1 20 LINK O HOH A 1 ZN ZN A 501 1555 1555 2.25 LINK O HOH A 2 ZN ZN A 501 1555 1555 2.54 LINK O HOH A 2 MG MG A 502 1555 1555 2.37 LINK O HOH A 3 MG MG A 502 1555 1555 2.29 LINK O HOH A 4 MG MG A 502 1555 1555 2.39 LINK O HOH A 5 MG MG A 502 1555 1555 2.29 LINK O HOH A 6 MG MG A 502 1555 1555 2.28 LINK ZN ZN A 501 NE2 HIS A 617 1555 1555 2.09 LINK ZN ZN A 501 NE2 HIS A 653 1555 1555 2.09 LINK ZN ZN A 501 OD2 ASP A 654 1555 1555 2.06 LINK ZN ZN A 501 OD1 ASP A 764 1555 1555 2.07 LINK MG MG A 502 OD1 ASP A 654 1555 1555 2.10 SITE 1 AC1 6 HOH A 1 HOH A 2 HIS A 617 HIS A 653 SITE 2 AC1 6 ASP A 654 ASP A 764 SITE 1 AC2 6 HOH A 2 HOH A 3 HOH A 4 HOH A 5 SITE 2 AC2 6 HOH A 6 ASP A 654 SITE 1 AC3 7 HOH A 10 HOH A 16 LEU A 672 LEU A 765 SITE 2 AC3 7 PHE A 786 GLN A 817 PHE A 820 CRYST1 74.456 74.456 130.132 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 0.013431 0.007754 0.000000 0.00000 SCALE2 0.000000 0.015508 0.000000 0.00000 SCALE3 0.000000 0.000000 0.007685 0.00000