HEADER LUMINESCENT PROTEIN 17-SEP-13 4MRY TITLE CRYSTAL STRUCTURE OF CA(2+)- DISCHARGED Y138F OBELIN MUTANT FROM TITLE 2 OBELIA LONGISSIMA AT 1.30 ANGSTROM RESOLUTION COMPND MOL_ID: 1; COMPND 2 MOLECULE: OBELIN; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: OBL; COMPND 5 ENGINEERED: YES; COMPND 6 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: OBELIA LONGISSIMA; SOURCE 3 ORGANISM_TAXID: 32570; SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 5 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 6 EXPRESSION_SYSTEM_STRAIN: BL21 GOLD; SOURCE 7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 8 EXPRESSION_SYSTEM_PLASMID: POL-138F KEYWDS LUMINESCENT PROTEIN, CALCIUM BINDING, EF-HAND EXPDTA X-RAY DIFFRACTION AUTHOR P.V.NATASHIN,W.DING,E.V.EREMEEVA,S.V.MARKOVA,J.LEE,E.S.VYSOTSKI, AUTHOR 2 Z.J.LIU REVDAT 3 08-NOV-23 4MRY 1 REMARK LINK REVDAT 2 01-JAN-20 4MRY 1 JRNL SEQADV REVDAT 1 12-MAR-14 4MRY 0 JRNL AUTH P.V.NATASHIN,W.DING,E.V.EREMEEVA,S.V.MARKOVA,J.LEE, JRNL AUTH 2 E.S.VYSOTSKI,Z.J.LIU JRNL TITL STRUCTURES OF THE CA2+-REGULATED PHOTOPROTEIN OBELIN Y138F JRNL TITL 2 MUTANT BEFORE AND AFTER BIOLUMINESCENCE SUPPORT THE JRNL TITL 3 CATALYTIC FUNCTION OF A WATER MOLECULE IN THE REACTION. JRNL REF ACTA CRYSTALLOGR.,SECT.D V. 70 720 2014 JRNL REFN ESSN 1399-0047 JRNL PMID 24598741 JRNL DOI 10.1107/S1399004713032434 REMARK 2 REMARK 2 RESOLUTION. 1.30 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX (PHENIX.REFINE: 1.7.3_928) 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) : 1.30 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 34.66 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 1.340 REMARK 3 COMPLETENESS FOR RANGE (%) : 94.4 REMARK 3 NUMBER OF REFLECTIONS : 40315 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.175 REMARK 3 R VALUE (WORKING SET) : 0.174 REMARK 3 FREE R VALUE : 0.193 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.960 REMARK 3 FREE R VALUE TEST SET COUNT : 2000 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 34.6750 - 3.1310 0.97 3007 157 0.1613 0.1763 REMARK 3 2 3.1310 - 2.4853 1.00 2956 154 0.1727 0.1693 REMARK 3 3 2.4853 - 2.1712 1.00 2925 153 0.1689 0.1754 REMARK 3 4 2.1712 - 1.9727 1.00 2909 152 0.1732 0.2034 REMARK 3 5 1.9727 - 1.8314 1.00 2898 151 0.1755 0.2086 REMARK 3 6 1.8314 - 1.7234 1.00 2900 152 0.1753 0.2102 REMARK 3 7 1.7234 - 1.6371 1.00 2879 150 0.1623 0.1934 REMARK 3 8 1.6371 - 1.5658 1.00 2865 149 0.1635 0.1841 REMARK 3 9 1.5658 - 1.5055 1.00 2862 150 0.1706 0.2267 REMARK 3 10 1.5055 - 1.4536 0.99 2849 149 0.1873 0.2045 REMARK 3 11 1.4536 - 1.4081 0.97 2770 144 0.1969 0.2689 REMARK 3 12 1.4081 - 1.3679 0.88 2518 131 0.2166 0.2152 REMARK 3 13 1.3679 - 1.3319 0.77 2183 115 0.2303 0.2594 REMARK 3 14 1.3319 - 1.2994 0.63 1794 93 0.2512 0.2335 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : FLAT BULK SOLVENT MODEL REMARK 3 SOLVENT RADIUS : 1.10 REMARK 3 SHRINKAGE RADIUS : 0.86 REMARK 3 K_SOL : 0.40 REMARK 3 B_SOL : 40.00 REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.160 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 18.360 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 10.24 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 13.55 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 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 : 0.007 1702 REMARK 3 ANGLE : 1.139 2318 REMARK 3 CHIRALITY : 0.074 234 REMARK 3 PLANARITY : 0.006 307 REMARK 3 DIHEDRAL : 17.759 651 REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : 1 REMARK 3 TLS GROUP : 1 REMARK 3 SELECTION: ALL REMARK 3 ORIGIN FOR THE GROUP (A): 12.4740 23.7732 16.7279 REMARK 3 T TENSOR REMARK 3 T11: 0.0466 T22: 0.0319 REMARK 3 T33: 0.0367 T12: -0.0130 REMARK 3 T13: 0.0098 T23: -0.0050 REMARK 3 L TENSOR REMARK 3 L11: 0.7163 L22: 0.3533 REMARK 3 L33: 0.4404 L12: 0.2127 REMARK 3 L13: 0.0257 L23: 0.0009 REMARK 3 S TENSOR REMARK 3 S11: 0.0048 S12: 0.0120 S13: 0.0706 REMARK 3 S21: 0.0065 S22: -0.0203 S23: -0.0000 REMARK 3 S31: 0.0503 S32: -0.0337 S33: -0.0009 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 4MRY COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 01-OCT-13. REMARK 100 THE DEPOSITION ID IS D_1000082291. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 22-SEP-11 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 : SSRF REMARK 200 BEAMLINE : BL17U REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.9789 REMARK 200 MONOCHROMATOR : SI 111 CHANNEL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 315R REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-2000 REMARK 200 DATA SCALING SOFTWARE : HKL-2000 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 40375 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.299 REMARK 200 RESOLUTION RANGE LOW (A) : 50.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 2.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 94.4 REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : NULL 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) : 1.30 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.32 REMARK 200 COMPLETENESS FOR SHELL (%) : 65.5 REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL 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: PHASES REMARK 200 STARTING MODEL: 2F8P REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 35.69 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.91 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 0.2M AMMONIUM NITRATE, 20% PEG 3350, REMARK 280 PH 6.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 289K 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 21.80700 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 34.12900 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 28.55600 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 34.12900 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 21.80700 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 28.55600 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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC REMARK 350 SOFTWARE USED: PISA 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 MET A 1 REMARK 465 ALA A 2 REMARK 465 SER A 3 REMARK 465 LYS A 4 REMARK 465 TYR A 5 REMARK 465 ALA A 6 REMARK 465 VAL A 7 REMARK 465 LYS A 8 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 ASP A 12 54.94 -142.46 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 CA A 202 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 30 OD1 REMARK 620 2 ASN A 32 OD1 81.9 REMARK 620 3 ASN A 34 OD1 87.1 73.6 REMARK 620 4 LYS A 36 O 88.1 150.1 77.8 REMARK 620 5 GLU A 41 OE2 94.3 76.6 149.6 132.5 REMARK 620 6 GLU A 41 OE1 98.7 126.8 159.3 82.5 50.2 REMARK 620 7 HOH A 370 O 171.0 92.9 84.4 92.9 91.6 90.3 REMARK 620 N 1 2 3 4 5 6 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA A 204 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 123 OD1 REMARK 620 2 ASP A 125 OD1 99.8 REMARK 620 3 ASP A 125 OD1 72.9 26.9 REMARK 620 4 SER A 127 OG 86.6 83.8 81.7 REMARK 620 5 THR A 129 O 83.4 158.2 147.5 74.9 REMARK 620 6 GLU A 134 OE1 113.5 115.5 127.6 147.4 82.0 REMARK 620 7 GLU A 134 OE2 93.9 74.9 77.9 158.4 126.6 50.4 REMARK 620 8 HOH A 481 O 167.0 78.3 104.4 80.4 93.7 78.4 98.0 REMARK 620 N 1 2 3 4 5 6 7 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA A 203 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 159 OD1 REMARK 620 2 ASP A 161 OD1 81.3 REMARK 620 3 SER A 163 OG 86.7 83.0 REMARK 620 4 ASP A 165 O 83.6 148.1 68.2 REMARK 620 5 GLU A 170 OE1 101.8 126.3 150.2 84.3 REMARK 620 6 GLU A 170 OE2 96.4 76.5 158.5 133.2 49.7 REMARK 620 7 HOH A 418 O 168.3 97.4 81.6 91.7 88.4 94.6 REMARK 620 N 1 2 3 4 5 6 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CEI A 201 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 202 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 203 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 204 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 2F8P RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF OBELIN FOLLOWING CA2+ TRIGGERED REMARK 900 BIOLUMINESCENCE SUGGESTS NEUTRAL COELENTERAMIDE AS THE PRIMARY REMARK 900 EXCITED STATE REMARK 900 RELATED ID: 1QV0 RELATED DB: PDB REMARK 900 ATOMIC RESOLUTION STRUCTURE OF OBELIN FROM OBELIA LONGISSIMA REMARK 900 RELATED ID: 1JF2 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF W92F OBELIN MUTANT FROM OBELIA LONGISSIMA AT REMARK 900 1.72 ANGSTROM RESOLUTION REMARK 900 RELATED ID: 1S36 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF A CA2+-DISCHARGED PHOTOPROTEIN: IMPLICATIONS REMARK 900 FOR THE MECHANISMS OF THE CALCIUM TRIGGER AND THE BIOLUMINESCENCE REMARK 900 RELATED ID: 1SL7 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF CALCIUM-LOADED APO-OBELIN FROM OBELIA REMARK 900 LONGISSIMA REMARK 900 RELATED ID: 1EJ3 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF AEQUORIN REMARK 900 RELATED ID: 4MRX RELATED DB: PDB DBREF 4MRY A 1 195 UNP Q27709 OBL_OBELO 1 195 SEQADV 4MRY ALA A 2 UNP Q27709 SER 2 ENGINEERED MUTATION SEQADV 4MRY PHE A 138 UNP Q27709 TYR 138 ENGINEERED MUTATION SEQRES 1 A 195 MET ALA SER LYS TYR ALA VAL LYS LEU LYS THR ASP PHE SEQRES 2 A 195 ASP ASN PRO ARG TRP ILE LYS ARG HIS LYS HIS MET PHE SEQRES 3 A 195 ASP PHE LEU ASP ILE ASN GLY ASN GLY LYS ILE THR LEU SEQRES 4 A 195 ASP GLU ILE VAL SER LYS ALA SER ASP ASP ILE CYS ALA SEQRES 5 A 195 LYS LEU GLU ALA THR PRO GLU GLN THR LYS ARG HIS GLN SEQRES 6 A 195 VAL CYS VAL GLU ALA PHE PHE ARG GLY CYS GLY MET GLU SEQRES 7 A 195 TYR GLY LYS GLU ILE ALA PHE PRO GLN PHE LEU ASP GLY SEQRES 8 A 195 TRP LYS GLN LEU ALA THR SER GLU LEU LYS LYS TRP ALA SEQRES 9 A 195 ARG ASN GLU PRO THR LEU ILE ARG GLU TRP GLY ASP ALA SEQRES 10 A 195 VAL PHE ASP ILE PHE ASP LYS ASP GLY SER GLY THR ILE SEQRES 11 A 195 THR LEU ASP GLU TRP LYS ALA PHE GLY LYS ILE SER GLY SEQRES 12 A 195 ILE SER PRO SER GLN GLU ASP CYS GLU ALA THR PHE ARG SEQRES 13 A 195 HIS CYS ASP LEU ASP ASN SER GLY ASP LEU ASP VAL ASP SEQRES 14 A 195 GLU MET THR ARG GLN HIS LEU GLY PHE TRP TYR THR LEU SEQRES 15 A 195 ASP PRO GLU ALA ASP GLY LEU TYR GLY ASN GLY VAL PRO HET CEI A 201 31 HET CA A 202 1 HET CA A 203 1 HET CA A 204 1 HETNAM CEI N-[3-BENZYL-5-(4-HYDROXYPHENYL)PYRAZIN-2-YL]-2-(4- HETNAM 2 CEI HYDROXYPHENYL)ACETAMIDE HETNAM CA CALCIUM ION HETSYN CEI COELENTERAMIDE FORMUL 2 CEI C25 H21 N3 O3 FORMUL 3 CA 3(CA 2+) FORMUL 6 HOH *297(H2 O) HELIX 1 1 ASN A 15 ASP A 30 1 16 HELIX 2 2 THR A 38 SER A 47 1 10 HELIX 3 3 SER A 47 LEU A 54 1 8 HELIX 4 4 THR A 57 GLY A 74 1 18 HELIX 5 5 PHE A 85 ALA A 104 1 20 HELIX 6 6 THR A 109 ASP A 123 1 15 HELIX 7 7 LEU A 132 LYS A 136 1 5 HELIX 8 8 ALA A 137 ILE A 141 5 5 HELIX 9 9 SER A 147 ASP A 159 1 13 HELIX 10 10 ASP A 167 TYR A 180 1 14 HELIX 11 11 ASP A 183 ASP A 187 5 5 SHEET 1 A 2 LYS A 36 ILE A 37 0 SHEET 2 A 2 ILE A 83 ALA A 84 -1 O ILE A 83 N ILE A 37 SHEET 1 B 2 ILE A 130 THR A 131 0 SHEET 2 B 2 ASP A 165 LEU A 166 -1 O LEU A 166 N ILE A 130 LINK OD1 ASP A 30 CA CA A 202 1555 1555 2.30 LINK OD1 ASN A 32 CA CA A 202 1555 1555 2.53 LINK OD1 ASN A 34 CA CA A 202 1555 1555 2.58 LINK O LYS A 36 CA CA A 202 1555 1555 2.43 LINK OE2 GLU A 41 CA CA A 202 1555 1555 2.60 LINK OE1 GLU A 41 CA CA A 202 1555 1555 2.65 LINK OD1 ASP A 123 CA CA A 204 1555 1555 2.35 LINK OD1AASP A 125 CA CA A 204 1555 1555 2.29 LINK OD1BASP A 125 CA CA A 204 1555 1555 2.48 LINK OG SER A 127 CA CA A 204 1555 1555 2.49 LINK O THR A 129 CA CA A 204 1555 1555 2.52 LINK OE1 GLU A 134 CA CA A 204 1555 1555 2.62 LINK OE2 GLU A 134 CA CA A 204 1555 1555 2.63 LINK OD1 ASP A 159 CA CA A 203 1555 1555 2.49 LINK OD1 ASP A 161 CA CA A 203 1555 1555 2.59 LINK OG SER A 163 CA CA A 203 1555 1555 2.71 LINK O ASP A 165 CA CA A 203 1555 1555 2.60 LINK OE1 GLU A 170 CA CA A 203 1555 1555 2.62 LINK OE2 GLU A 170 CA CA A 203 1555 1555 2.69 LINK CA CA A 202 O HOH A 370 1555 1555 2.61 LINK CA CA A 203 O HOH A 418 1555 1555 2.25 LINK CA CA A 204 O HOH A 481 1555 1555 2.41 SITE 1 AC1 16 HIS A 22 MET A 25 LEU A 29 PHE A 72 SITE 2 AC1 16 PHE A 88 TRP A 92 TRP A 114 GLY A 115 SITE 3 AC1 16 VAL A 118 ILE A 141 MET A 171 HIS A 175 SITE 4 AC1 16 TRP A 179 TYR A 190 HOH A 301 HOH A 302 SITE 1 AC2 6 ASP A 30 ASN A 32 ASN A 34 LYS A 36 SITE 2 AC2 6 GLU A 41 HOH A 370 SITE 1 AC3 6 ASP A 159 ASP A 161 SER A 163 ASP A 165 SITE 2 AC3 6 GLU A 170 HOH A 418 SITE 1 AC4 6 ASP A 123 ASP A 125 SER A 127 THR A 129 SITE 2 AC4 6 GLU A 134 HOH A 481 CRYST1 43.614 57.112 68.258 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 0.022928 0.000000 0.000000 0.00000 SCALE2 0.000000 0.017509 0.000000 0.00000 SCALE3 0.000000 0.000000 0.014650 0.00000