HEADER TRANSPORT PROTEIN/AGONIST 08-MAY-12 4F2Q TITLE QUISQUALATE BOUND TO THE D655A MUTANT OF THE LIGAND BINDING DOMAIN OF TITLE 2 GLUA3 COMPND MOL_ID: 1; COMPND 2 MOLECULE: GLUTAMATE RECEPTOR 3; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: GLUR-3, AMPA-SELECTIVE GLUTAMATE RECEPTOR 3, GLUR-C, GLUR- COMPND 5 K3, GLUTAMATE RECEPTOR IONOTROPIC, AMPA 3, GLUA3; COMPND 6 ENGINEERED: YES; COMPND 7 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS; SOURCE 3 ORGANISM_COMMON: RAT; SOURCE 4 ORGANISM_TAXID: 10116; SOURCE 5 GENE: GLUR3, GRIA3, GRIA3; GLUA3; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: ORIGAMI B (DE3); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET-22B(+) KEYWDS GLUTAMATE RECEPTOR, GLUA3, GLUR3, AMPA RECEPTOR, S1S2, LBD, KEYWDS 2 NEUROTRANSMITTER RECEPTOR, QUISQUALATE, TRANSPORT PROTEIN-AGONIST KEYWDS 3 COMPLEX EXPDTA X-RAY DIFFRACTION AUTHOR A.H.AHMED,R.E.OSWALD REVDAT 5 06-NOV-24 4F2Q 1 REMARK REVDAT 4 13-SEP-23 4F2Q 1 REMARK SEQADV REVDAT 3 16-AUG-17 4F2Q 1 SOURCE REMARK REVDAT 2 20-JUN-12 4F2Q 1 JRNL REVDAT 1 30-MAY-12 4F2Q 0 JRNL AUTH S.M.HOLLEY,A.H.AHMED,J.SRINIVASAN,S.E.MURTHY,G.A.WEILAND, JRNL AUTH 2 R.E.OSWALD,L.M.NOWAK JRNL TITL THE LOSS OF AN ELECTROSTATIC CONTACT UNIQUE TO AMPA RECEPTOR JRNL TITL 2 LIGAND BINDING DOMAIN 2 SLOWS CHANNEL ACTIVATION. JRNL REF BIOCHEMISTRY V. 51 4015 2012 JRNL REFN ISSN 0006-2960 JRNL PMID 22512472 JRNL DOI 10.1021/BI3001837 REMARK 2 REMARK 2 RESOLUTION. 2.20 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX (PHENIX.REFINE) REMARK 3 AUTHORS : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN REMARK 3 : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE, REMARK 3 : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER, REMARK 3 : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY, REMARK 3 : REETAL PAI,RANDY READ,JANE RICHARDSON, REMARK 3 : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI, REMARK 3 : NICHOLAS SAUTER,JACOB SMITH,LAURENT REMARK 3 : STORONI,TOM TERWILLIGER,PETER ZWART REMARK 3 REMARK 3 REFINEMENT TARGET : ML REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.20 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 22.66 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 0.080 REMARK 3 COMPLETENESS FOR RANGE (%) : 93.4 REMARK 3 NUMBER OF REFLECTIONS : 15490 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.201 REMARK 3 R VALUE (WORKING SET) : 0.195 REMARK 3 FREE R VALUE : 0.261 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 10.030 REMARK 3 FREE R VALUE TEST SET COUNT : 1553 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (IN BINS). REMARK 3 BIN RESOLUTION RANGE COMPL. NWORK NFREE RWORK RFREE REMARK 3 1 22.6600 - 4.8816 0.94 1376 162 0.1899 0.2247 REMARK 3 2 4.8816 - 3.8810 0.97 1365 149 0.1516 0.2086 REMARK 3 3 3.8810 - 3.3922 0.98 1319 146 0.1753 0.2509 REMARK 3 4 3.3922 - 3.0829 0.97 1317 152 0.1935 0.2568 REMARK 3 5 3.0829 - 2.8624 0.96 1294 145 0.2102 0.2870 REMARK 3 6 2.8624 - 2.6939 0.95 1266 136 0.2229 0.2688 REMARK 3 7 2.6939 - 2.5592 0.95 1277 144 0.2195 0.2916 REMARK 3 8 2.5592 - 2.4479 0.91 1218 134 0.2242 0.3211 REMARK 3 9 2.4479 - 2.3538 0.90 1207 128 0.2156 0.3320 REMARK 3 10 2.3538 - 2.2727 0.89 1166 127 0.2166 0.3062 REMARK 3 11 2.2727 - 2.2020 0.85 1132 130 0.2245 0.3145 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : FLAT BULK SOLVENT MODEL REMARK 3 SOLVENT RADIUS : 1.11 REMARK 3 SHRINKAGE RADIUS : 0.90 REMARK 3 K_SOL : 0.34 REMARK 3 B_SOL : 33.58 REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.300 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 25.820 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) : -7.74680 REMARK 3 B22 (A**2) : 5.77750 REMARK 3 B33 (A**2) : -1.80130 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 TWINNING INFORMATION. REMARK 3 FRACTION: NULL REMARK 3 OPERATOR: NULL REMARK 3 REMARK 3 DEVIATIONS FROM IDEAL VALUES. REMARK 3 RMSD COUNT REMARK 3 BOND : 0.013 2078 REMARK 3 ANGLE : 1.466 2796 REMARK 3 CHIRALITY : 0.088 307 REMARK 3 PLANARITY : 0.008 348 REMARK 3 DIHEDRAL : 16.896 780 REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : NULL REMARK 3 REMARK 3 NCS DETAILS REMARK 3 NUMBER OF NCS GROUPS : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 4F2Q COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 18-MAY-12. REMARK 100 THE DEPOSITION ID IS D_1000072380. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 13-APR-09 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 6.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : CHESS REMARK 200 BEAMLINE : A1 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.977 REMARK 200 MONOCHROMATOR : RH COATED SI REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 210 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-3000 REMARK 200 DATA SCALING SOFTWARE : HKL-3000 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : NULL REMARK 200 RESOLUTION RANGE HIGH (A) : 2.200 REMARK 200 RESOLUTION RANGE LOW (A) : 50.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.0 REMARK 200 DATA REDUNDANCY : 5.500 REMARK 200 R MERGE (I) : 0.18900 REMARK 200 R SYM (I) : 0.18900 REMARK 200 FOR THE DATA SET : 10.4060 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.20 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.24 REMARK 200 COMPLETENESS FOR SHELL (%) : 100.0 REMARK 200 DATA REDUNDANCY IN SHELL : 5.20 REMARK 200 R MERGE FOR SHELL (I) : 0.75800 REMARK 200 R SYM FOR SHELL (I) : 0.75800 REMARK 200 FOR SHELL : 2.194 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: PHENIX REMARK 200 STARTING MODEL: 3DLN REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 54.57 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.71 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 14-15% PEG 8K, 0.1 M SODIUM REMARK 280 CACODYLATE, 0.1-0.15 M ZINC ACETATE, 0.25 M AMMONIUM SULFATE, PH REMARK 280 6.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 2 2 21 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,Z+1/2 REMARK 290 3555 -X,Y,-Z+1/2 REMARK 290 4555 X,-Y,-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 68.43050 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 68.43050 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 0.00000 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: DIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 2580 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 23800 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -64.0 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 0.00000 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 SER A 168 145.90 -36.87 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 QUS A 301 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 302 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 4F1Y RELATED DB: PDB REMARK 900 RELATED ID: 4F22 RELATED DB: PDB REMARK 900 RELATED ID: 4F29 RELATED DB: PDB REMARK 900 RELATED ID: 4F2O RELATED DB: PDB REMARK 900 RELATED ID: 4F31 RELATED DB: PDB REMARK 900 RELATED ID: 4F39 RELATED DB: PDB REMARK 900 RELATED ID: 4F3B RELATED DB: PDB REMARK 900 RELATED ID: 4F3G RELATED DB: PDB DBREF 4F2Q A 4 117 UNP P19492 GRIA3_RAT 417 530 DBREF 4F2Q A 120 261 UNP P19492 GRIA3_RAT 658 799 SEQADV 4F2Q GLY A 118 UNP P19492 LINKER SEQADV 4F2Q THR A 119 UNP P19492 LINKER SEQADV 4F2Q ALA A 139 UNP P19492 ASP 677 ENGINEERED MUTATION SEQRES 1 A 258 ARG THR ILE VAL VAL THR THR ILE LEU GLU SER PRO TYR SEQRES 2 A 258 VAL MET TYR LYS LYS ASN HIS GLU GLN LEU GLU GLY ASN SEQRES 3 A 258 GLU ARG TYR GLU GLY TYR CYS VAL ASP LEU ALA TYR GLU SEQRES 4 A 258 ILE ALA LYS HIS VAL ARG ILE LYS TYR LYS LEU SER ILE SEQRES 5 A 258 VAL GLY ASP GLY LYS TYR GLY ALA ARG ASP PRO GLU THR SEQRES 6 A 258 LYS ILE TRP ASN GLY MET VAL GLY GLU LEU VAL TYR GLY SEQRES 7 A 258 ARG ALA ASP ILE ALA VAL ALA PRO LEU THR ILE THR LEU SEQRES 8 A 258 VAL ARG GLU GLU VAL ILE ASP PHE SER LYS PRO PHE MET SEQRES 9 A 258 SER LEU GLY ILE SER ILE MET ILE LYS LYS GLY THR PRO SEQRES 10 A 258 ILE GLU SER ALA GLU ASP LEU ALA LYS GLN THR GLU ILE SEQRES 11 A 258 ALA TYR GLY THR LEU ALA SER GLY SER THR LYS GLU PHE SEQRES 12 A 258 PHE ARG ARG SER LYS ILE ALA VAL TYR GLU LYS MET TRP SEQRES 13 A 258 SER TYR MET LYS SER ALA GLU PRO SER VAL PHE THR LYS SEQRES 14 A 258 THR THR ALA ASP GLY VAL ALA ARG VAL ARG LYS SER LYS SEQRES 15 A 258 GLY LYS PHE ALA PHE LEU LEU GLU SER THR MET ASN GLU SEQRES 16 A 258 TYR ILE GLU GLN ARG LYS PRO CYS ASP THR MET LYS VAL SEQRES 17 A 258 GLY GLY ASN LEU ASP SER LYS GLY TYR GLY VAL ALA THR SEQRES 18 A 258 PRO LYS GLY SER ALA LEU GLY ASN ALA VAL ASN LEU ALA SEQRES 19 A 258 VAL LEU LYS LEU ASN GLU GLN GLY LEU LEU ASP LYS LEU SEQRES 20 A 258 LYS ASN LYS TRP TRP TYR ASP LYS GLY GLU CYS HET QUS A 301 13 HET ZN A 302 1 HETNAM QUS (S)-2-AMINO-3-(3,5-DIOXO-[1,2,4]OXADIAZOLIDIN-2-YL)- HETNAM 2 QUS PROPIONIC ACID HETNAM ZN ZINC ION HETSYN QUS QUISQUALATE FORMUL 2 QUS C5 H7 N3 O5 FORMUL 3 ZN ZN 2+ FORMUL 4 HOH *186(H2 O) HELIX 1 1 ASN A 22 LEU A 26 5 5 HELIX 2 2 GLU A 27 GLU A 30 5 4 HELIX 3 3 GLY A 34 ARG A 48 1 15 HELIX 4 4 ASN A 72 TYR A 80 1 9 HELIX 5 5 THR A 93 GLU A 98 1 6 HELIX 6 6 SER A 123 LYS A 129 1 7 HELIX 7 7 GLY A 141 SER A 150 1 10 HELIX 8 8 ILE A 152 ALA A 165 1 14 HELIX 9 9 THR A 173 SER A 184 1 12 HELIX 10 10 SER A 194 GLN A 202 1 9 HELIX 11 11 LEU A 230 GLN A 244 1 15 HELIX 12 12 GLY A 245 TRP A 255 1 11 SHEET 1 A 3 LYS A 50 ILE A 55 0 SHEET 2 A 3 THR A 5 THR A 10 1 N VAL A 8 O SER A 54 SHEET 3 A 3 ILE A 85 ALA A 86 1 O ILE A 85 N THR A 9 SHEET 1 B 2 MET A 18 TYR A 19 0 SHEET 2 B 2 TYR A 32 GLU A 33 -1 O GLU A 33 N MET A 18 SHEET 1 C 2 ILE A 100 PHE A 102 0 SHEET 2 C 2 ALA A 223 PRO A 225 -1 O THR A 224 N ASP A 101 SHEET 1 D 2 MET A 107 LEU A 109 0 SHEET 2 D 2 LYS A 218 TYR A 220 -1 O LYS A 218 N LEU A 109 SHEET 1 E 4 ALA A 134 THR A 137 0 SHEET 2 E 4 PHE A 188 GLU A 193 1 O LEU A 191 N GLY A 136 SHEET 3 E 4 ILE A 111 LYS A 116 -1 N MET A 114 O PHE A 190 SHEET 4 E 4 THR A 208 VAL A 211 -1 O VAL A 211 N ILE A 113 SSBOND 1 CYS A 206 CYS A 261 1555 1555 2.23 LINK NE2 HIS A 23 ZN ZN A 302 1555 1555 2.26 CISPEP 1 SER A 14 PRO A 15 0 -1.43 CISPEP 2 GLU A 166 PRO A 167 0 -6.26 CISPEP 3 LYS A 204 PRO A 205 0 5.75 SITE 1 AC1 12 TYR A 61 PRO A 89 THR A 91 ARG A 96 SITE 2 AC1 12 LEU A 138 GLY A 141 SER A 142 THR A 143 SITE 3 AC1 12 LEU A 192 GLU A 193 MET A 196 HOH A 406 SITE 1 AC2 2 HIS A 23 GLU A 24 CRYST1 47.660 48.027 136.861 90.00 90.00 90.00 P 2 2 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 0.020982 0.000000 0.000000 0.00000 SCALE2 0.000000 0.020822 0.000000 0.00000 SCALE3 0.000000 0.000000 0.007307 0.00000