HEADER RNA 27-JUL-18 6E80 TITLE CRYSTAL STRUCTURE OF THE CORN APTAMER IN UNLIGANDED STATE COMPND MOL_ID: 1; COMPND 2 MOLECULE: RNA (36-MER); COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 ORGANISM_SCIENTIFIC: SYNTHETIC CONSTRUCT; SOURCE 4 ORGANISM_TAXID: 32630 KEYWDS POLYRIBONUCLEOTIDE, FLUORIGENIC APTAMER, G-QUADRUPLEX, APO, RNA EXPDTA X-RAY DIFFRACTION AUTHOR L.SJEKLOCA,A.R.FERRE-D'AMARE REVDAT 3 11-OCT-23 6E80 1 REMARK REVDAT 2 28-AUG-19 6E80 1 JRNL REVDAT 1 31-JUL-19 6E80 0 JRNL AUTH L.SJEKLOCA,A.R.FERRE-D'AMARE JRNL TITL BINDING BETWEEN G QUADRUPLEXES AT THE HOMODIMER INTERFACE OF JRNL TITL 2 THE CORN RNA APTAMER STRONGLY ACTIVATES THIOFLAVIN T JRNL TITL 3 FLUORESCENCE. JRNL REF CELL CHEM BIOL V. 26 1159 2019 JRNL REFN ESSN 2451-9456 JRNL PMID 31178406 JRNL DOI 10.1016/J.CHEMBIOL.2019.04.012 REMARK 2 REMARK 2 RESOLUTION. 2.90 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX 1.11.1_2575 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 : NULL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.90 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 46.51 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 1.410 REMARK 3 COMPLETENESS FOR RANGE (%) : 85.4 REMARK 3 NUMBER OF REFLECTIONS : 4068 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.258 REMARK 3 R VALUE (WORKING SET) : 0.252 REMARK 3 FREE R VALUE : 0.307 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 9.860 REMARK 3 FREE R VALUE TEST SET COUNT : 401 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 46.5120 - 4.1831 0.86 1247 130 0.2572 0.3337 REMARK 3 2 4.1831 - 3.3205 0.85 1212 135 0.2461 0.2705 REMARK 3 3 3.3205 - 2.9009 0.85 1208 136 0.2505 0.3050 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : NULL REMARK 3 SOLVENT RADIUS : 1.11 REMARK 3 SHRINKAGE RADIUS : 0.90 REMARK 3 K_SOL : NULL REMARK 3 B_SOL : NULL REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.390 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 33.340 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 52.61 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 48.83 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 : 0.001 878 REMARK 3 ANGLE : 0.292 1384 REMARK 3 CHIRALITY : 0.019 175 REMARK 3 PLANARITY : 0.002 37 REMARK 3 DIHEDRAL : 12.365 417 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): 15.1918 60.3891 26.9675 REMARK 3 T TENSOR REMARK 3 T11: 0.2789 T22: 0.4530 REMARK 3 T33: 0.3376 T12: -0.0437 REMARK 3 T13: 0.0145 T23: -0.0732 REMARK 3 L TENSOR REMARK 3 L11: 2.8740 L22: 2.7529 REMARK 3 L33: 3.6548 L12: 0.8669 REMARK 3 L13: -0.1169 L23: -2.6408 REMARK 3 S TENSOR REMARK 3 S11: 0.0255 S12: -0.6737 S13: 0.1916 REMARK 3 S21: -0.0286 S22: -0.1524 S23: -0.0385 REMARK 3 S31: 0.2144 S32: 0.3927 S33: 0.3963 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 6E80 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 01-AUG-18. REMARK 100 THE DEPOSITION ID IS D_1000235822. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 10-JUN-16 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 5.6 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : ALS REMARK 200 BEAMLINE : 5.0.2 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.10503 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : PIXEL REMARK 200 DETECTOR MANUFACTURER : DECTRIS PILATUS3 X 6M REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-2000 REMARK 200 DATA SCALING SOFTWARE : HKL-2000 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 3961 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.400 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 (%) : 89.2 REMARK 200 DATA REDUNDANCY : 2.100 REMARK 200 R MERGE (I) : 0.14700 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 8.4000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.40 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.44 REMARK 200 COMPLETENESS FOR SHELL (%) : 63.5 REMARK 200 DATA REDUNDANCY IN SHELL : 1.30 REMARK 200 R MERGE FOR SHELL (I) : 0.45500 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: PHASER 2.7.16 REMARK 200 STARTING MODEL: 6E81 REMARK 200 REMARK 200 REMARK: RECTANGULAR PLATE-SHAPED REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 49.17 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.42 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 20% PEG 4000, 0.2 M AMMONIUM ACETATE REMARK 280 PH 6.7, SODIUM CITRATE PH 5.6, VAPOR DIFFUSION, HANGING DROP, REMARK 280 TEMPERATURE 294K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: H 3 2 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z REMARK 290 3555 -X+Y,-X,Z REMARK 290 4555 Y,X,-Z REMARK 290 5555 X-Y,-Y,-Z REMARK 290 6555 -X,-X+Y,-Z REMARK 290 7555 X+2/3,Y+1/3,Z+1/3 REMARK 290 8555 -Y+2/3,X-Y+1/3,Z+1/3 REMARK 290 9555 -X+Y+2/3,-X+1/3,Z+1/3 REMARK 290 10555 Y+2/3,X+1/3,-Z+1/3 REMARK 290 11555 X-Y+2/3,-Y+1/3,-Z+1/3 REMARK 290 12555 -X+2/3,-X+Y+1/3,-Z+1/3 REMARK 290 13555 X+1/3,Y+2/3,Z+2/3 REMARK 290 14555 -Y+1/3,X-Y+2/3,Z+2/3 REMARK 290 15555 -X+Y+1/3,-X+2/3,Z+2/3 REMARK 290 16555 Y+1/3,X+2/3,-Z+2/3 REMARK 290 17555 X-Y+1/3,-Y+2/3,-Z+2/3 REMARK 290 18555 -X+1/3,-X+Y+2/3,-Z+2/3 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 0.00000 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 0.00000 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 0.00000 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 0.00000 REMARK 290 SMTRY1 7 1.000000 0.000000 0.000000 46.50600 REMARK 290 SMTRY2 7 0.000000 1.000000 0.000000 26.85025 REMARK 290 SMTRY3 7 0.000000 0.000000 1.000000 22.18667 REMARK 290 SMTRY1 8 -0.500000 -0.866025 0.000000 46.50600 REMARK 290 SMTRY2 8 0.866025 -0.500000 0.000000 26.85025 REMARK 290 SMTRY3 8 0.000000 0.000000 1.000000 22.18667 REMARK 290 SMTRY1 9 -0.500000 0.866025 0.000000 46.50600 REMARK 290 SMTRY2 9 -0.866025 -0.500000 0.000000 26.85025 REMARK 290 SMTRY3 9 0.000000 0.000000 1.000000 22.18667 REMARK 290 SMTRY1 10 -0.500000 0.866025 0.000000 46.50600 REMARK 290 SMTRY2 10 0.866025 0.500000 0.000000 26.85025 REMARK 290 SMTRY3 10 0.000000 0.000000 -1.000000 22.18667 REMARK 290 SMTRY1 11 1.000000 0.000000 0.000000 46.50600 REMARK 290 SMTRY2 11 0.000000 -1.000000 0.000000 26.85025 REMARK 290 SMTRY3 11 0.000000 0.000000 -1.000000 22.18667 REMARK 290 SMTRY1 12 -0.500000 -0.866025 0.000000 46.50600 REMARK 290 SMTRY2 12 -0.866025 0.500000 0.000000 26.85025 REMARK 290 SMTRY3 12 0.000000 0.000000 -1.000000 22.18667 REMARK 290 SMTRY1 13 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 13 0.000000 1.000000 0.000000 53.70050 REMARK 290 SMTRY3 13 0.000000 0.000000 1.000000 44.37333 REMARK 290 SMTRY1 14 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 14 0.866025 -0.500000 0.000000 53.70050 REMARK 290 SMTRY3 14 0.000000 0.000000 1.000000 44.37333 REMARK 290 SMTRY1 15 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 15 -0.866025 -0.500000 0.000000 53.70050 REMARK 290 SMTRY3 15 0.000000 0.000000 1.000000 44.37333 REMARK 290 SMTRY1 16 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 16 0.866025 0.500000 0.000000 53.70050 REMARK 290 SMTRY3 16 0.000000 0.000000 -1.000000 44.37333 REMARK 290 SMTRY1 17 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 17 0.000000 -1.000000 0.000000 53.70050 REMARK 290 SMTRY3 17 0.000000 0.000000 -1.000000 44.37333 REMARK 290 SMTRY1 18 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 18 -0.866025 0.500000 0.000000 53.70050 REMARK 290 SMTRY3 18 0.000000 0.000000 -1.000000 44.37333 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 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 -0.500000 -0.866025 0.000000 93.01200 REMARK 350 BIOMT2 2 -0.866025 0.500000 0.000000 53.70050 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 44.37333 REMARK 375 REMARK 375 SPECIAL POSITION REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL REMARK 375 POSITIONS. REMARK 375 REMARK 375 ATOM RES CSSEQI REMARK 375 IR IR A 112 LIES ON A SPECIAL POSITION. 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 G A 1 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 OP2 G A 12 O2' G A 22 18655 2.19 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 K A 104 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 G A 12 O6 REMARK 620 2 G A 13 O6 90.5 REMARK 620 3 G A 15 O6 78.8 83.5 REMARK 620 4 G A 16 O6 142.1 63.6 71.6 REMARK 620 5 G A 22 O6 110.8 151.5 82.4 88.5 REMARK 620 6 G A 23 O6 144.5 110.5 130.3 73.2 62.6 REMARK 620 7 G A 25 O6 64.4 136.7 121.6 152.8 71.5 81.1 REMARK 620 8 G A 26 O6 90.9 62.7 144.7 99.6 132.5 75.1 82.0 REMARK 620 N 1 2 3 4 5 6 7 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue IRI A 101 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue IRI A 102 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue IRI A 103 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue K A 104 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue MG A 107 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue ACT A 109 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue ACT A 110 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC8 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue IR A 111 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 5BJP RELATED DB: PDB REMARK 900 5BJP CONTAINS SAME RNA SEQUENCE WITH DFHO LIGAND AND FROM CHEMICAL REMARK 900 SYNTHESIS DBREF 6E80 A 1 36 PDB 6E80 6E80 1 36 SEQRES 1 A 36 G G C G C G A G G A A G G SEQRES 2 A 36 A G G U C U G A G G A G G SEQRES 3 A 36 U C A C U G C G C C HET IRI A 101 7 HET IRI A 102 7 HET IRI A 103 7 HET K A 104 1 HET MG A 105 1 HET MG A 106 1 HET MG A 107 1 HET MG A 108 1 HET ACT A 109 4 HET ACT A 110 4 HET IR A 111 1 HET IR A 112 1 HETNAM IRI IRIDIUM HEXAMMINE ION HETNAM K POTASSIUM ION HETNAM MG MAGNESIUM ION HETNAM ACT ACETATE ION HETNAM IR IRIDIUM ION FORMUL 2 IRI 3(H18 IR N6 3+) FORMUL 5 K K 1+ FORMUL 6 MG 4(MG 2+) FORMUL 10 ACT 2(C2 H3 O2 1-) FORMUL 12 IR 2(IR 4+) FORMUL 14 HOH *2(H2 O) LINK O6 G A 12 K K A 104 1555 1555 2.87 LINK O6 G A 13 K K A 104 1555 1555 2.85 LINK O6 G A 15 K K A 104 1555 1555 2.90 LINK O6 G A 16 K K A 104 1555 1555 2.88 LINK O6 G A 22 K K A 104 1555 1555 2.80 LINK O6 G A 23 K K A 104 1555 1555 2.88 LINK O6 G A 25 K K A 104 1555 1555 2.98 LINK O6 G A 26 K K A 104 1555 1555 3.16 LINK OP1 C A 35 MG MG A 107 1555 1555 2.86 SITE 1 AC1 4 A A 29 C A 30 U A 31 G A 32 SITE 1 AC2 4 U A 19 G A 20 C A 33 G A 34 SITE 1 AC3 4 G A 6 A A 7 U A 27 C A 28 SITE 1 AC4 8 G A 12 G A 13 G A 15 G A 16 SITE 2 AC4 8 G A 22 G A 23 G A 25 G A 26 SITE 1 AC5 1 C A 35 SITE 1 AC6 2 G A 20 G A 34 SITE 1 AC7 2 A A 10 A A 11 SITE 1 AC8 1 HOH A 201 CRYST1 93.012 93.012 66.560 90.00 90.00 120.00 H 3 2 18 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 0.010751 0.006207 0.000000 0.00000 SCALE2 0.000000 0.012415 0.000000 0.00000 SCALE3 0.000000 0.000000 0.015024 0.00000