HEADER STRUCTURAL PROTEIN/RNA 28-APR-04 1T42 OBSLTE 10-AUG-04 1T42 1U6B TITLE CRYSTAL STRUCTURE OF A SELF-SPLICING GROUP I INTRON WITH TITLE 2 BOTH EXONS COMPND MOL_ID: 1; COMPND 2 MOLECULE: U1 SMALL NUCLEAR RIBONUCLEOPROTEIN A; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: U1 SNRNP PROTEIN A, U1A PROTEIN, U1-A; COMPND 5 ENGINEERED: YES; COMPND 6 MOL_ID: 2; COMPND 7 MOLECULE: 197-MER; COMPND 8 CHAIN: B; COMPND 9 FRAGMENT: GROUP I INTRON; COMPND 10 ENGINEERED: YES; COMPND 11 MOL_ID: 3; COMPND 12 MOLECULE: 5'- COMPND 13 R(*AP*AP*GP*CP*CP*AP*CP*AP*CP*AP*AP*AP*CP*CP*AP*GP*AP*CP*GP COMPND 14 *GP*CP*C)-3'; COMPND 15 CHAIN: C; COMPND 16 FRAGMENT: GROUP I EXON; COMPND 17 ENGINEERED: YES; COMPND 18 MOL_ID: 4; COMPND 19 MOLECULE: 5'-R(*CP*AP*(5MU))-3'; COMPND 20 CHAIN: D; COMPND 21 ENGINEERED: YES; COMPND 22 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 GENE: SNRPA; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_COMMON: BACTERIA; SOURCE 7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 8 EXPRESSION_SYSTEM_PLASMID: PET11; SOURCE 9 MOL_ID: 2; SOURCE 10 SYNTHETIC: YES; SOURCE 11 OTHER_DETAILS: RNA WAS IS TRANSCRIBED BY T7 RNA SOURCE 12 POLYMERASE.; SOURCE 13 MOL_ID: 3; SOURCE 14 SYNTHETIC: YES; SOURCE 15 MOL_ID: 4; SOURCE 16 SYNTHETIC: YES KEYWDS INTRON, EXON, RIBOZYME, GROUP I, U1A, RNA EXPDTA X-RAY DIFFRACTION AUTHOR P.L.ADAMS,M.R.STAHLEY,A.B.KOSEK,J.WANG,S.A.STROBEL REVDAT 3 10-AUG-04 1T42 1 OBSLTE REVDAT 2 29-JUN-04 1T42 1 JRNL REVDAT 1 08-JUN-04 1T42 0 JRNL AUTH P.L.ADAMS,M.R.STAHLEY,A.B.KOSEK,J.WANG,S.A.STROBEL JRNL TITL CRYSTAL STRUCTURE OF A SELF-SPLICING GROUP I JRNL TITL 2 INTRON WITH BOTH EXONS. JRNL REF NATURE V. 430 45 2004 JRNL REFN ASTM NATUAS UK ISSN 0028-0836 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH T.R.CECH,A.J.ZAUG,P.J.GRABOWASKI REMARK 1 TITL IN VITRO SPLICING OF THE RIBOSOMAL RNA PRECURSOR REMARK 1 TITL 2 OF TETRAHYMENA: INVOLVEMENT OF A GUANOSINE REMARK 1 TITL 3 NUCLEOTIDE IN THE EXCISION OF INTERVENING SEQUENCE REMARK 1 REF CELL (CAMBRIDGE,MASS.) V. 27 487 1981 REMARK 1 REFN ASTM CELLB5 US ISSN 0092-8674 REMARK 1 REFERENCE 2 REMARK 1 AUTH B.REINHOLD-HUREK,D.A.SHUB REMARK 1 TITL SELF-SPLICING INTRON IN TRNA GENES OF WIDELY REMARK 1 TITL 2 DIVERGENT BACTERIA REMARK 1 REF NATURE V. 357 173 1992 REMARK 1 REFN ASTM NATUAS UK ISSN 0028-0836 REMARK 2 REMARK 2 RESOLUTION. 3.10 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) : 3.10 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 48.37 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 372050.250 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 88.3 REMARK 3 NUMBER OF REFLECTIONS : 24640 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) : 0.261 REMARK 3 FREE R VALUE : 0.304 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.400 REMARK 3 FREE R VALUE TEST SET COUNT : 1086 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.009 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 6 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 3.10 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 3.29 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 71.30 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 3085 REMARK 3 BIN R VALUE (WORKING SET) : 0.3370 REMARK 3 BIN FREE R VALUE : 0.4030 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 4.60 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 148 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.033 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 775 REMARK 3 NUCLEIC ACID ATOMS : 4768 REMARK 3 HETEROGEN ATOMS : 18 REMARK 3 SOLVENT ATOMS : 54 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 76.90 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 3.93000 REMARK 3 B22 (A**2) : 3.93000 REMARK 3 B33 (A**2) : -7.87000 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) : 0.44 REMARK 3 ESD FROM SIGMAA (A) : 0.46 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) : 0.53 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.48 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.010 REMARK 3 BOND ANGLES (DEGREES) : 1.50 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 14.80 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.96 REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : RESTRAINED REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : 1.780 ; 3.000 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 3.230 ; 3.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 4.810 ; 3.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 7.220 ; 5.000 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.28 REMARK 3 BSOL : 300.00 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 : PROTEIN_REP.PARAM REMARK 3 PARAMETER FILE 2 : RNA_DNA_KLEIN_RIBO REMARK 3 PARAMETER FILE 3 : ION.PARAM REMARK 3 PARAMETER FILE 4 : WATER_REP.PARAM REMARK 3 PARAMETER FILE 5 : 5TP_PO2_MOD2_KLEIN REMARK 3 PARAMETER FILE 6 : NULL REMARK 3 TOPOLOGY FILE 1 : PROTEIN.TOP REMARK 3 TOPOLOGY FILE 2 : DNA-RNA.TOP REMARK 3 TOPOLOGY FILE 3 : WATER.TOP REMARK 3 TOPOLOGY FILE 4 : 5TP_PO2_MOD2.TOP REMARK 3 TOPOLOGY FILE 5 : ION.TOP REMARK 3 TOPOLOGY FILE 6 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1T42 COMPLIES WITH FORMAT V. 2.3, 09-JULY-1998 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY THE NUCLEIC ACID DATABASE REMARK 100 ON 10-MAY-2004. REMARK 100 THE NDB ID CODE IS PR0127. REMARK 105 REMARK 105 THE PROTEIN DATA BANK HAS ADOPTED THE SACCHARIDE CHEMISTS REMARK 105 NOMENCLATURE FOR ATOMS OF THE DEOXYRIBOSE/RIBOSE MOIETY REMARK 105 RATHER THAN THAT OF THE NUCLEOSIDE CHEMISTS. THE RING REMARK 105 OXYGEN ATOM IS LABELLED O4* INSTEAD OF O1*. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 20-JUL-2003 REMARK 200 TEMPERATURE (KELVIN) : 100.0 REMARK 200 PH : 6.80 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) : 1.1 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 4 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-2000 REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 24640 REMARK 200 RESOLUTION RANGE HIGH (A) : 3.100 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 (%) : NULL 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) : NULL REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : NULL REMARK 200 COMPLETENESS FOR SHELL (%) : NULL 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: MAD REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MAD REMARK 200 SOFTWARE USED: MLPHARE REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 72.06 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 4.40 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: MPD, PH 6.8, VAPOR DIFFUSION, REMARK 280 HANGING DROP, TEMPERATURE 298K, PH 6.80 REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 41 2 2 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,1/2+Z REMARK 290 3555 -Y,X,1/4+Z REMARK 290 4555 Y,-X,3/4+Z REMARK 290 5555 -X,Y,-Z REMARK 290 6555 X,-Y,1/2-Z REMARK 290 7555 Y,X,3/4-Z REMARK 290 8555 -Y,-X,1/4-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 124.57900 REMARK 290 SMTRY1 3 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 62.28950 REMARK 290 SMTRY1 4 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY2 4 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 186.86850 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 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 124.57900 REMARK 290 SMTRY1 7 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY2 7 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 186.86850 REMARK 290 SMTRY1 8 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY2 8 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 8 0.000000 0.000000 -1.000000 62.28950 REMARK 290 REMARK 290 REMARK: NULL REMARK 300 REMARK 300 BIOMOLECULE: 1 REMARK 300 THIS ENTRY CONTAINS THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT REMARK 300 WHICH CONSISTS OF 4 CHAIN(S). SEE REMARK 350 FOR REMARK 300 INFORMATION ON GENERATING THE BIOLOGICAL MOLECULE(S). REMARK 350 REMARK 350 GENERATING THE BIOMOLECULE 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 APPLY THE FOLLOWING TO CHAINS: B, C, D, 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 VAL A 3 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 REMARK 500 O2* A B 47 O2P A B 48 1.92 REMARK 500 O2* G B 37 O1P G B 38 2.01 REMARK 500 O2* G B 10 O2* A B 58 2.11 REMARK 500 O2P C B 31 O HOH 43 2.11 REMARK 500 O2* U B 9 O2* A B 59 2.15 REMARK 500 N3 G B 151 O HOH 40 2.18 REMARK 500 O1P G B 89 O HOH 6 2.19 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: ENGH AND HUBER, 1991 REMARK 500 REMARK 500 M RES CSSEQI ATM1 ATM2 ATM3 REMARK 500 PRO A 8 CB - CA - C ANGL. DEV. = 7.9 DEGREES REMARK 500 PRO A 8 CA - CB - CG ANGL. DEV. =-10.5 DEGREES REMARK 999 REMARK 999 SEQUENCE REMARK 999 NUCLEOTIDES 1001B TO 1014B BELONG TO AN ENGINEERED U1A LOOP REMARK 999 AND ARE INSERTED BETWEEN GUA-107B AND CYT-112B. THERE ARE REMARK 999 NO NUCLEOTIDES BETWEEN GUA-1B AND GUA-5B DUE TO A CLONING REMARK 999 DESIGN. O2' OF DEOXY MODIFICATION OF RNA NUCLEOTIDES ARE REMARK 999 INCLUDED WITH Q=0.00 AND B=0.00. THEY ARE AT GUA-206C, CYT- REMARK 999 1C, CYT-205C, AND THY-1D. CHAINS B AND C ARE TWO PARTS OF REMARK 999 THE ORIGINAL ONE INTRON SEQUENCE BECAUSE OF AN EXPERIMENTAL REMARK 999 DESIGN. THE U1A PROTEIN USED IN THIS STUDY WAS A DOUBLE REMARK 999 MUTANT IN WHICH TYR-31/GLN-36 WAS REPLACED WITH HIS-31/ARG- REMARK 999 36. THE FIRST THREE RESIDUES IN U1A PROTEIN WERE MISSING IN REMARK 999 THE STRUCTURE. DBREF 1T42 A 1 98 UNP P09012 RU1A_HUMAN 1 98 SEQADV 1T42 HIS A 31 UNP P09012 TYR 31 ENGINEERED SEQADV 1T42 ARG A 36 UNP P09012 GLN 36 ENGINEERED SEQRES 1 A 98 MET ALA VAL PRO GLU THR ARG PRO ASN HIS THR ILE TYR SEQRES 2 A 98 ILE ASN ASN LEU ASN GLU LYS ILE LYS LYS ASP GLU LEU SEQRES 3 A 98 LYS LYS SER LEU HIS ALA ILE PHE SER ARG PHE GLY GLN SEQRES 4 A 98 ILE LEU ASP ILE LEU VAL SER ARG SER LEU LYS MET ARG SEQRES 5 A 98 GLY GLN ALA PHE VAL ILE PHE LYS GLU VAL SER SER ALA SEQRES 6 A 98 THR ASN ALA LEU ARG SER MET GLN GLY PHE PRO PHE TYR SEQRES 7 A 98 ASP LYS PRO MET ARG ILE GLN TYR ALA LYS THR ASP SER SEQRES 8 A 98 ASP ILE ILE ALA LYS MET LYS SEQRES 1 B 197 GTP G C C G U G U G C C U U SEQRES 2 B 197 G C G C C G G G A A A C C SEQRES 3 B 197 A C G C A A G G G A U G G SEQRES 4 B 197 U G U C A A A U U C G G C SEQRES 5 B 197 G A A A C C U A A G C G C SEQRES 6 B 197 C C G C C C G G G C G U A SEQRES 7 B 197 U G G C A A C G C C G A G SEQRES 8 B 197 C C A A G C U U C G C A G SEQRES 9 B 197 C C A U U G C A C U C C G SEQRES 10 B 197 G C U G C G A U G A A G G SEQRES 11 B 197 U G U A G A G A C U A G A SEQRES 12 B 197 C G G C A C C C A C C U A SEQRES 13 B 197 A G G C A A A C G C U A U SEQRES 14 B 197 G G U G A A G G C A U A G SEQRES 15 B 197 U C C A G G G A G U G G C SEQRES 16 B 197 G A23 SEQRES 1 C 22 A A G C C A C A C A A A C SEQRES 2 C 22 C A G A C G G C C SEQRES 1 D 3 C A 5MU MODRES 1T42 GTP B 1 G GUANOSINE-5'-TRIPHOSPHATE MODRES 1T42 A23 B 190 A MODRES 1T42 5MU D 1 U 5-METHYLURIDINE 5'-MONOPHOSPHATE HET GTP B 1 32 HET A23 B 190 25 HET 5MU D 1 21 HET K 82 1 HET K 84 1 HET K 85 1 HET K 86 1 HET K 87 1 HET MG 91 1 HET MG 93 1 HET MG 98 1 HET MG 99 1 HET MG 110 1 HET MG 111 1 HET MG 112 1 HET MG 113 1 HET MG 114 1 HET MG 115 1 HET MG 116 1 HET MG 117 1 HET MG 118 1 HETNAM GTP GUANOSINE-5'-TRIPHOSPHATE HETNAM A23 ADENOSINE-5'-PHOSPHATE-2',3'-CYCLIC PHOSPHATE HETNAM 5MU 5-METHYLURIDINE 5'-MONOPHOSPHATE HETNAM K POTASSIUM ION HETNAM MG MAGNESIUM ION FORMUL 1 GTP C10 H16 N5 O14 P3 FORMUL 1 A23 C10 H13 N5 O9 P2 FORMUL 3 5MU C10 H15 N2 O9 P FORMUL 5 K 5(K 1+) FORMUL 10 MG 13(MG 2+) FORMUL 23 HOH *54(H2 O1) HELIX 1 1 LYS A 22 ARG A 36 1 15 HELIX 2 2 GLU A 61 GLN A 73 1 13 HELIX 3 3 SER A 91 LYS A 96 1 6 SHEET 1 A 4 ILE A 40 LEU A 44 0 SHEET 2 A 4 GLN A 54 PHE A 59 -1 O ILE A 58 N LEU A 41 SHEET 3 A 4 THR A 11 ASN A 15 -1 N ILE A 14 O ALA A 55 SHEET 4 A 4 ARG A 83 TYR A 86 -1 O ARG A 83 N ASN A 15 LINK O3* A D 2 P 5MU D 1 CRYST1 108.541 108.541 249.158 90.00 90.00 90.00 P 41 2 2 8 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 0.009213 0.000000 0.000000 0.00000 SCALE2 0.000000 0.009213 0.000000 0.00000 SCALE3 0.000000 0.000000 0.004014 0.00000