HEADER LYASE 01-DEC-06 2O3H TITLE CRYSTAL STRUCTURE OF THE HUMAN C65A APE COMPND MOL_ID: 1; COMPND 2 MOLECULE: DNA-(APURINIC OR APYRIMIDINIC SITE) LYASE; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: AP ENDONUCLEASE 1, APEX NUCLEASE, APEN, REF-1 PROTEIN, COMPND 5 APURINIC/APYRIMIDINIC ENDONUCLEASE; COMPND 6 EC: 4.2.99.18; 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: APEX1, APE, APEX, APX, HAP1, REF1; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3) ROSETTA; SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET28A KEYWDS APE, ENDONUCLEASE, LYASE EXPDTA X-RAY DIFFRACTION AUTHOR M.M.GEORGIADIS,R.K.GAUR,S.DELAPLANE,J.SVENSON REVDAT 6 30-AUG-23 2O3H 1 REMARK REVDAT 5 20-OCT-21 2O3H 1 REMARK SEQADV LINK REVDAT 4 18-OCT-17 2O3H 1 REMARK REVDAT 3 16-JUN-09 2O3H 1 JRNL REVDAT 2 24-FEB-09 2O3H 1 VERSN REVDAT 1 11-DEC-07 2O3H 0 JRNL AUTH M.M.GEORGIADIS,M.LUO,R.K.GAUR,S.DELAPLANE,X.LI,M.R.KELLEY JRNL TITL EVOLUTION OF THE REDOX FUNCTION IN MAMMALIAN JRNL TITL 2 APURINIC/APYRIMIDINIC ENDONUCLEASE JRNL REF MUTAT.RES. V. 643 54 2008 JRNL REFN ISSN 0027-5107 JRNL PMID 18579163 JRNL DOI 10.1016/J.MRFMMM.2008.04.008 REMARK 2 REMARK 2 RESOLUTION. 1.90 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 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 : NULL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.90 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 50.00 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) (%) : 91.4 REMARK 3 NUMBER OF REFLECTIONS : 22727 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) : 0.177 REMARK 3 FREE R VALUE : 0.226 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.400 REMARK 3 FREE R VALUE TEST SET COUNT : 1103 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 : 2218 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 18 REMARK 3 SOLVENT ATOMS : 286 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 17.64 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 1.42400 REMARK 3 B22 (A**2) : -0.66800 REMARK 3 B33 (A**2) : -0.75600 REMARK 3 B12 (A**2) : 0.00000 REMARK 3 B13 (A**2) : 0.00000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : 0.19 REMARK 3 ESD FROM SIGMAA (A) : 0.05 REMARK 3 LOW RESOLUTION CUTOFF (A) : 5.00 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) : 0.004 REMARK 3 BOND ANGLES (DEGREES) : NULL 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) : 1.290 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 1.975 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 2.152 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 3.141 ; 2.500 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : NULL REMARK 3 KSOL : NULL REMARK 3 BSOL : 39.34 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 : CNS_TOPPAR:PROTEIN_REP.PARAM REMARK 3 PARAMETER FILE 2 : CNS_TOPPAR:DNA-RNA_REP.PARAM REMARK 3 PARAMETER FILE 3 : CNS_TOPPAR:WATER_REP.PARAM REMARK 3 PARAMETER FILE 4 : CNS_TOPPAR:ION.PARAM REMARK 3 PARAMETER FILE 5 : CNS_TOPPAR:ACT.PARAM REMARK 3 PARAMETER FILE 6 : NULL REMARK 3 TOPOLOGY FILE 1 : CNS_TOPPAR:PROTEIN.TOP REMARK 3 TOPOLOGY FILE 2 : CNS_TOPPAR:DNA-RNA.TOP REMARK 3 TOPOLOGY FILE 3 : CNS_TOPPAR:WATER.TOP REMARK 3 TOPOLOGY FILE 4 : CNS_TOPPAR:ION.TOP REMARK 3 TOPOLOGY FILE 5 : CNS_TOPPAR:ACT.TOP REMARK 3 TOPOLOGY FILE 6 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 2O3H COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 08-DEC-06. REMARK 100 THE DEPOSITION ID IS D_1000040639. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 16-APR-04 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 6.0 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : APS REMARK 200 BEAMLINE : 19-ID REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.97951 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 315 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO, HKL-2000 REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 22948 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.900 REMARK 200 RESOLUTION RANGE LOW (A) : 50.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 93.4 REMARK 200 DATA REDUNDANCY : 5.200 REMARK 200 R MERGE (I) : 0.07100 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 12.9000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.90 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.97 REMARK 200 COMPLETENESS FOR SHELL (%) : 92.1 REMARK 200 DATA REDUNDANCY IN SHELL : 5.20 REMARK 200 R MERGE FOR SHELL (I) : 0.16200 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : NULL 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: 1E9N REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 48.22 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.38 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 20% PEG 8000, 100 MM MES PH 6.0, 7.5 REMARK 280 MM SAMARIUM ACETATE, 4% DIOXANE, VAPOR DIFFUSION, HANGING DROP, REMARK 280 TEMPERATURE 298K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2 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 23.34650 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 71.80200 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 23.34650 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 71.80200 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 GLY A 34 REMARK 465 SER A 35 REMARK 465 HIS A 36 REMARK 465 ASP A 124 REMARK 465 LYS A 125 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 SM SM A 401 O HOH A 703 1.95 REMARK 500 SM SM A 401 O HOH A 789 2.04 REMARK 500 SM SM A 401 O HOH A 703 2.09 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC REMARK 500 SYMMETRY ARE IN CLOSE CONTACT. AN ATOM LOCATED WITHIN 0.15 REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375 REMARK 500 INSTEAD OF REMARK 500. ATOMS WITH NON-BLANK ALTERNATE REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS. REMARK 500 REMARK 500 DISTANCE CUTOFF: REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI SSYMOP DISTANCE REMARK 500 O HOH A 690 O HOH A 690 2655 1.91 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 LEU A 111 79.55 -114.25 REMARK 500 LEU A 114 53.75 -142.32 REMARK 500 SER A 129 -140.28 51.14 REMARK 500 PHE A 232 26.47 -144.22 REMARK 500 REMARK 500 REMARK: NULL REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM A 400 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM A 401 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ACT A 500 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ACT A 501 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ACT A 502 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ACT A 503 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 2O3C RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF ZEBRAFISH APE DBREF 2O3H A 40 318 UNP P27695 APEX1_HUMAN 39 317 SEQADV 2O3H GLY A 34 UNP P27695 EXPRESSION TAG SEQADV 2O3H SER A 35 UNP P27695 EXPRESSION TAG SEQADV 2O3H HIS A 36 UNP P27695 EXPRESSION TAG SEQADV 2O3H MET A 37 UNP P27695 EXPRESSION TAG SEQADV 2O3H ALA A 38 UNP P27695 EXPRESSION TAG SEQADV 2O3H SER A 39 UNP P27695 EXPRESSION TAG SEQADV 2O3H ALA A 65 UNP P27695 CYS 64 ENGINEERED MUTATION SEQRES 1 A 285 GLY SER HIS MET ALA SER GLU GLY PRO ALA LEU TYR GLU SEQRES 2 A 285 ASP PRO PRO ASP GLN LYS THR SER PRO SER GLY LYS PRO SEQRES 3 A 285 ALA THR LEU LYS ILE ALA SER TRP ASN VAL ASP GLY LEU SEQRES 4 A 285 ARG ALA TRP ILE LYS LYS LYS GLY LEU ASP TRP VAL LYS SEQRES 5 A 285 GLU GLU ALA PRO ASP ILE LEU CYS LEU GLN GLU THR LYS SEQRES 6 A 285 CYS SER GLU ASN LYS LEU PRO ALA GLU LEU GLN GLU LEU SEQRES 7 A 285 PRO GLY LEU SER HIS GLN TYR TRP SER ALA PRO SER ASP SEQRES 8 A 285 LYS GLU GLY TYR SER GLY VAL GLY LEU LEU SER ARG GLN SEQRES 9 A 285 CYS PRO LEU LYS VAL SER TYR GLY ILE GLY ASP GLU GLU SEQRES 10 A 285 HIS ASP GLN GLU GLY ARG VAL ILE VAL ALA GLU PHE ASP SEQRES 11 A 285 SER PHE VAL LEU VAL THR ALA TYR VAL PRO ASN ALA GLY SEQRES 12 A 285 ARG GLY LEU VAL ARG LEU GLU TYR ARG GLN ARG TRP ASP SEQRES 13 A 285 GLU ALA PHE ARG LYS PHE LEU LYS GLY LEU ALA SER ARG SEQRES 14 A 285 LYS PRO LEU VAL LEU CYS GLY ASP LEU ASN VAL ALA HIS SEQRES 15 A 285 GLU GLU ILE ASP LEU ARG ASN PRO LYS GLY ASN LYS LYS SEQRES 16 A 285 ASN ALA GLY PHE THR PRO GLN GLU ARG GLN GLY PHE GLY SEQRES 17 A 285 GLU LEU LEU GLN ALA VAL PRO LEU ALA ASP SER PHE ARG SEQRES 18 A 285 HIS LEU TYR PRO ASN THR PRO TYR ALA TYR THR PHE TRP SEQRES 19 A 285 THR TYR MET MET ASN ALA ARG SER LYS ASN VAL GLY TRP SEQRES 20 A 285 ARG LEU ASP TYR PHE LEU LEU SER HIS SER LEU LEU PRO SEQRES 21 A 285 ALA LEU CYS ASP SER LYS ILE ARG SER LYS ALA LEU GLY SEQRES 22 A 285 SER ASP HIS CYS PRO ILE THR LEU TYR LEU ALA LEU HET SM A 400 1 HET SM A 401 2 HET ACT A 500 4 HET ACT A 501 4 HET ACT A 502 4 HET ACT A 503 4 HETNAM SM SAMARIUM (III) ION HETNAM ACT ACETATE ION FORMUL 2 SM 2(SM 3+) FORMUL 4 ACT 4(C2 H3 O2 1-) FORMUL 8 HOH *286(H2 O) HELIX 1 1 GLY A 71 LYS A 78 1 8 HELIX 2 2 LYS A 79 ALA A 88 1 10 HELIX 3 3 PRO A 105 SER A 115 5 11 HELIX 4 4 ASP A 148 ASP A 152 5 5 HELIX 5 5 GLY A 176 VAL A 180 5 5 HELIX 6 6 ARG A 181 SER A 201 1 21 HELIX 7 7 GLU A 216 LEU A 220 5 5 HELIX 8 8 THR A 233 VAL A 247 1 15 HELIX 9 9 SER A 252 TYR A 257 1 6 HELIX 10 10 ASN A 272 ASN A 277 1 6 HELIX 11 11 HIS A 289 PRO A 293 5 5 SHEET 1 A 6 HIS A 116 SER A 120 0 SHEET 2 A 6 VAL A 131 SER A 135 -1 O SER A 135 N HIS A 116 SHEET 3 A 6 ILE A 91 GLN A 95 -1 N LEU A 92 O LEU A 134 SHEET 4 A 6 LEU A 62 ASN A 68 1 N ALA A 65 O CYS A 93 SHEET 5 A 6 ILE A 312 LEU A 316 -1 O LEU A 314 N ILE A 64 SHEET 6 A 6 LEU A 295 ILE A 300 -1 N LYS A 299 O THR A 313 SHEET 1 B 6 LYS A 141 TYR A 144 0 SHEET 2 B 6 VAL A 157 GLU A 161 -1 O GLU A 161 N LYS A 141 SHEET 3 B 6 VAL A 166 TYR A 171 -1 O LEU A 167 N ALA A 160 SHEET 4 B 6 LEU A 205 ASP A 210 1 O VAL A 206 N VAL A 168 SHEET 5 B 6 ASP A 283 LEU A 287 -1 O LEU A 286 N LEU A 207 SHEET 6 B 6 ALA A 250 ASP A 251 -1 N ALA A 250 O LEU A 287 LINK OE2 GLU A 96 SM A SM A 401 1555 1555 2.07 CISPEP 1 VAL A 247 PRO A 248 0 -0.26 SITE 1 AC1 7 GLU A 216 GLU A 217 GLU A 242 GLN A 245 SITE 2 AC1 7 HOH A 506 HOH A 589 HOH A 646 SITE 1 AC2 7 ASP A 70 GLU A 96 HOH A 559 HOH A 593 SITE 2 AC2 7 HOH A 676 HOH A 703 HOH A 789 SITE 1 AC3 7 LYS A 78 LEU A 104 ALA A 106 GLN A 109 SITE 2 AC3 7 HOH A 652 HOH A 697 HOH A 784 SITE 1 AC4 3 ASN A 272 ARG A 274 SER A 275 SITE 1 AC5 7 MET A 37 ALA A 38 SER A 120 TYR A 144 SITE 2 AC5 7 ASP A 152 HOH A 523 HOH A 530 SITE 1 AC6 4 SER A 56 TYR A 128 SER A 129 TYR A 171 CRYST1 46.693 143.604 45.385 90.00 90.00 90.00 P 21 21 2 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 0.021416 0.000000 0.000000 0.00000 SCALE2 0.000000 0.006964 0.000000 0.00000 SCALE3 0.000000 0.000000 0.022034 0.00000