HEADER HYDROLASE,RNA BINDING PROTEIN/RNA 03-DEC-20 7KX7 TITLE CRYO-EM STRUCTURE OF EPHYDATIA FLUVIATILIS PIWIA-PIRNA COMPLEX COMPND MOL_ID: 1; COMPND 2 MOLECULE: PIWI-A; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: PIWI; COMPND 5 EC: 3.1.26.-; COMPND 6 ENGINEERED: YES; COMPND 7 MUTATION: YES; COMPND 8 MOL_ID: 2; COMPND 9 MOLECULE: RNA (5'-R(P*UP*CP*UP*CP*AP*GP*(OMC))-3'); COMPND 10 CHAIN: B; COMPND 11 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: EPHYDATIA FLUVIATILIS; SOURCE 3 ORGANISM_TAXID: 31330; SOURCE 4 GENE: EFPIWIA; SOURCE 5 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 7108; SOURCE 7 EXPRESSION_SYSTEM_VECTOR_TYPE: BACULOVIRUS; SOURCE 8 EXPRESSION_SYSTEM_VECTOR: PFASTBAC1-HM; SOURCE 9 MOL_ID: 2; SOURCE 10 SYNTHETIC: YES; SOURCE 11 ORGANISM_SCIENTIFIC: SYNTHETIC CONSTRUCT; SOURCE 12 ORGANISM_TAXID: 32630 KEYWDS RNASEH, PROTEIN-RNA COMPLEX, RNA BINDING PROTEIN, PIRNA BINDING, PAZ KEYWDS 2 PIWI DOMAIN PROTEIN, HYDROLASE, RNA BINDING PROTEIN-RNA COMPLEX EXPDTA ELECTRON MICROSCOPY AUTHOR T.A.ANZELON,S.CHOWDHURY,G.C.LANDER,I.J.MACRAE REVDAT 4 22-SEP-21 7KX7 1 JRNL REVDAT 3 15-SEP-21 7KX7 1 JRNL REVDAT 2 01-SEP-21 7KX7 1 JRNL REVDAT 1 14-JUL-21 7KX7 0 JRNL AUTH T.A.ANZELON,S.CHOWDHURY,S.M.HUGHES,Y.XIAO,G.C.LANDER, JRNL AUTH 2 I.J.MACRAE JRNL TITL STRUCTURAL BASIS FOR PIRNA TARGETING. JRNL REF NATURE V. 597 285 2021 JRNL REFN ESSN 1476-4687 JRNL PMID 34471284 JRNL DOI 10.1038/S41586-021-03856-X REMARK 2 REMARK 2 RESOLUTION. 3.80 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : RELION, LEGINON, CTFFIND, RELION, REMARK 3 RELION, RELION REMARK 3 RECONSTRUCTION SCHEMA : BACK PROJECTION REMARK 3 REMARK 3 EM MAP-MODEL FITTING AND REFINEMENT REMARK 3 PDB ENTRY : NULL REMARK 3 REFINEMENT SPACE : NULL REMARK 3 REFINEMENT PROTOCOL : NULL REMARK 3 REFINEMENT TARGET : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE : NULL REMARK 3 REMARK 3 FITTING PROCEDURE : NULL REMARK 3 REMARK 3 EM IMAGE RECONSTRUCTION STATISTICS REMARK 3 NOMINAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 ACTUAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 EFFECTIVE RESOLUTION (ANGSTROMS) : 3.800 REMARK 3 NUMBER OF PARTICLES : 186293 REMARK 3 CTF CORRECTION METHOD : PHASE FLIPPING AND AMPLITUDE REMARK 3 CORRECTION REMARK 3 REMARK 3 EM RECONSTRUCTION MAGNIFICATION CALIBRATION: NULL REMARK 3 REMARK 3 OTHER DETAILS: NULL REMARK 4 REMARK 4 7KX7 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 12-DEC-20. REMARK 100 THE DEPOSITION ID IS D_1000252946. REMARK 245 REMARK 245 EXPERIMENTAL DETAILS REMARK 245 RECONSTRUCTION METHOD : SINGLE PARTICLE REMARK 245 SPECIMEN TYPE : NULL REMARK 245 REMARK 245 ELECTRON MICROSCOPE SAMPLE REMARK 245 SAMPLE TYPE : PARTICLE REMARK 245 PARTICLE TYPE : POINT REMARK 245 NAME OF SAMPLE : COMPLEX BETWEEN EFPIWI AND REMARK 245 PIRNA; PIWI-A; PIRNA REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : 2.50 REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : FREEZING WAS CARRIED OUT IN A REMARK 245 COLD ROOM AT 4 DEGREE C AND REMARK 245 RELATIVE HUMIDITY BETWEEN 95%- REMARK 245 98%. 3.5 UL SAMPLE WAS APPLIED REMARK 245 TO PLASMA CLEANED GRID AND REMARK 245 MANUALLY BLOTTED WITH WHATMAN 1 REMARK 245 FILTER PAPER FOR 5-7 SEC BEFORE REMARK 245 PLUNGE FREEZING IN LIQUID REMARK 245 ETHANE AT -179 DEGREE C. REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 8.00 REMARK 245 SAMPLE DETAILS : NULL REMARK 245 REMARK 245 DATA ACQUISITION REMARK 245 DATE OF EXPERIMENT : NULL REMARK 245 NUMBER OF MICROGRAPHS-IMAGES : 1765 REMARK 245 TEMPERATURE (KELVIN) : NULL REMARK 245 MICROSCOPE MODEL : FEI TALOS ARCTICA REMARK 245 DETECTOR TYPE : GATAN K2 SUMMIT (4K X 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 1000.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 1600.00 REMARK 245 MINIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 MAXIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 NOMINAL CS : 2.70 REMARK 245 IMAGING MODE : BRIGHT FIELD REMARK 245 ELECTRON DOSE (ELECTRONS NM**-2) : 4733.00 REMARK 245 ILLUMINATION MODE : FLOOD BEAM REMARK 245 NOMINAL MAGNIFICATION : 36000 REMARK 245 CALIBRATED MAGNIFICATION : 43478 REMARK 245 SOURCE : FIELD EMISSION GUN REMARK 245 ACCELERATION VOLTAGE (KV) : 200 REMARK 245 IMAGING DETAILS : NULL REMARK 247 REMARK 247 ELECTRON MICROSCOPY REMARK 247 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM ELECTRON REMARK 247 MICROSCOPY DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE REMARK 247 THAT CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES REMARK 247 ON THESE RECORDS ARE MEANINGLESS EXCEPT FOR THE CALCULATION REMARK 247 OF THE STRUCTURE FACTORS. 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, B 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 400 REMARK 400 COMPOUND REMARK 400 GAPS IN THE STRUCTURE CORRESPOND TO REGIONS LACKING DENSITY, THAT REMARK 400 COULD NOT BE CONFIDENTLY MODELED 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 SER A 220 REMARK 465 LEU A 221 REMARK 465 ASN A 222 REMARK 465 VAL A 223 REMARK 465 GLU A 224 REMARK 465 SER A 225 REMARK 465 SER A 226 REMARK 465 MET A 227 REMARK 465 VAL A 228 REMARK 465 PHE A 413 REMARK 465 ASN A 414 REMARK 465 GLN A 415 REMARK 465 ASP A 416 REMARK 465 LYS A 417 REMARK 465 PHE A 418 REMARK 465 ARG A 419 REMARK 465 GLU A 420 REMARK 465 GLU A 421 REMARK 465 ALA A 422 REMARK 465 LYS A 491 REMARK 465 LYS A 492 REMARK 465 GLN A 493 REMARK 465 ARG A 494 REMARK 465 GLY A 495 REMARK 465 LYS A 496 REMARK 465 GLN A 497 REMARK 465 ASP A 498 REMARK 465 GLU A 499 REMARK 465 GLY A 500 REMARK 465 ARG A 501 REMARK 465 LYS A 502 REMARK 465 GLU A 503 REMARK 465 VAL A 504 REMARK 465 GLU A 505 REMARK 465 GLU A 506 REMARK 465 GLN A 795 REMARK 465 SER A 796 REMARK 465 GLN A 797 REMARK 465 GLU A 798 REMARK 465 U B 5 REMARK 465 U B 6 REMARK 465 G B 7 REMARK 465 A B 8 REMARK 465 G B 9 REMARK 465 U B 10 REMARK 465 U B 11 REMARK 465 G B 12 REMARK 465 G B 13 REMARK 465 A B 14 REMARK 465 C B 15 REMARK 465 A B 16 REMARK 465 A B 17 REMARK 465 A B 18 REMARK 465 U B 19 REMARK 465 G B 20 REMARK 465 G B 21 REMARK 465 C B 22 REMARK 470 REMARK 470 MISSING ATOM REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER; REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 470 I=INSERTION CODE): REMARK 470 M RES CSSEQI ATOMS REMARK 470 PHE A 255 CG CD1 CD2 CE1 CE2 CZ REMARK 470 LYS A 256 CG CD CE NZ REMARK 470 TYR A 257 CG CD1 CD2 CE1 CE2 CZ OH REMARK 470 VAL A 259 CG1 CG2 REMARK 470 PHE A 261 CG CD1 CD2 CE1 CE2 CZ REMARK 470 ASN A 262 CG OD1 ND2 REMARK 470 PRO A 263 CG CD REMARK 470 PRO A 264 CG CD REMARK 470 VAL A 265 CG1 CG2 REMARK 470 GLU A 266 CG CD OE1 OE2 REMARK 470 ASP A 267 CG OD1 OD2 REMARK 470 ILE A 268 CG1 CG2 CD1 REMARK 470 ARG A 269 CG CD NE CZ NH1 NH2 REMARK 470 SER A 270 OG REMARK 470 ARG A 271 CG CD NE CZ NH1 NH2 REMARK 470 SER A 272 OG REMARK 470 GLN A 273 CG CD OE1 NE2 REMARK 470 LEU A 274 CG CD1 CD2 REMARK 470 LEU A 275 CG CD1 CD2 REMARK 470 ASN A 276 CG OD1 ND2 REMARK 470 GLU A 277 CG CD OE1 OE2 REMARK 470 HIS A 278 CG ND1 CD2 CE1 NE2 REMARK 470 LYS A 279 CG CD CE NZ REMARK 470 GLU A 280 CG CD OE1 OE2 REMARK 470 LEU A 281 CG CD1 CD2 REMARK 470 ILE A 282 CG1 CG2 CD1 REMARK 470 LEU A 284 CG CD1 CD2 REMARK 470 PHE A 288 CG CD1 CD2 CE1 CE2 CZ REMARK 470 ASP A 289 CG OD1 OD2 REMARK 470 SER A 291 OG REMARK 470 ILE A 299 CG1 CG2 CD1 REMARK 470 CYS A 300 SG REMARK 470 GLU A 301 CG CD OE1 OE2 REMARK 470 GLN A 302 CG CD OE1 NE2 REMARK 470 ARG A 303 CG CD NE CZ NH1 NH2 REMARK 470 LEU A 304 CG CD1 CD2 REMARK 470 ASP A 305 CG OD1 OD2 REMARK 470 LEU A 306 CG CD1 CD2 REMARK 470 MET A 307 CG SD CE REMARK 470 SER A 308 OG REMARK 470 THR A 309 OG1 CG2 REMARK 470 ARG A 310 CG CD NE CZ NH1 NH2 REMARK 470 GLN A 311 CG CD OE1 NE2 REMARK 470 THR A 312 OG1 CG2 REMARK 470 ASP A 313 CG OD1 OD2 REMARK 470 SER A 316 OG REMARK 470 ILE A 317 CG1 CG2 CD1 REMARK 470 LYS A 318 CG CD CE NZ REMARK 470 VAL A 319 CG1 CG2 REMARK 470 THR A 320 OG1 CG2 REMARK 470 ILE A 321 CG1 CG2 CD1 REMARK 470 SER A 322 OG REMARK 470 LEU A 323 CG CD1 CD2 REMARK 470 VAL A 324 CG1 CG2 REMARK 470 ASP A 325 CG OD1 OD2 REMARK 470 SER A 326 OG REMARK 470 LYS A 899 CG CD CE NZ REMARK 470 SER A 900 OG REMARK 470 TYR A 901 O CG CD1 CD2 CE1 CE2 CZ REMARK 470 TYR A 901 OH REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS 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,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3) REMARK 500 REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999 REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996 REMARK 500 REMARK 500 M RES CSSEQI ATM1 RES CSSEQI ATM2 DEVIATION REMARK 500 U B 1 P U B 1 OP3 -0.131 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 SER A 234 67.07 63.17 REMARK 500 ILE A 282 -61.33 -120.30 REMARK 500 ASP A 289 52.61 -92.45 REMARK 500 LEU A 323 44.11 -100.61 REMARK 500 PRO A 366 44.03 -84.32 REMARK 500 GLN A 371 117.26 -162.45 REMARK 500 ALA A 459 66.61 61.74 REMARK 500 PRO A 512 42.04 -85.28 REMARK 500 ALA A 516 117.84 -161.77 REMARK 500 THR A 521 79.06 -115.76 REMARK 500 ASP A 522 -17.65 69.47 REMARK 500 THR A 558 -32.00 -130.18 REMARK 500 ILE A 705 -63.08 -121.29 REMARK 500 GLN A 722 -54.31 -121.54 REMARK 500 GLN A 723 -47.99 -134.81 REMARK 500 LEU A 744 -60.15 -93.73 REMARK 500 THR A 779 31.61 -140.55 REMARK 500 ALA A 864 113.00 -161.08 REMARK 500 THR A 896 10.76 58.22 REMARK 500 PRO A 955 172.17 -59.92 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 MG A1001 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 LEU A 987 O REMARK 620 2 LEU A 987 OXT 64.3 REMARK 620 3 U B 1 OP3 121.9 83.2 REMARK 620 4 U B 3 OP1 122.5 171.4 88.5 REMARK 620 N 1 2 3 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-23061 RELATED DB: EMDB REMARK 900 CRYO-EM STRUCTURE OF EPHYDATIA FLUVIATILIS PIWIA-PIRNA COMPLEX DBREF 7KX7 A 220 987 UNP D5MRY8 D5MRY8_9METZ 220 987 DBREF 7KX7 B 1 25 PDB 7KX7 7KX7 1 25 SEQRES 1 A 768 SER LEU ASN VAL GLU SER SER MET VAL SER GLN ARG GLY SEQRES 2 A 768 SER SER GLY GLN PRO VAL PRO VAL SER ALA ASN TYR LEU SEQRES 3 A 768 PRO LEU LYS GLY ASN MET ASP GLY VAL PHE LYS TYR ALA SEQRES 4 A 768 VAL GLY PHE ASN PRO PRO VAL GLU ASP ILE ARG SER ARG SEQRES 5 A 768 SER GLN LEU LEU ASN GLU HIS LYS GLU LEU ILE GLY LEU SEQRES 6 A 768 THR ARG VAL PHE ASP GLY SER THR LEU TYR VAL PRO LYS SEQRES 7 A 768 ARG ILE CYS GLU GLN ARG LEU ASP LEU MET SER THR ARG SEQRES 8 A 768 GLN THR ASP GLY ALA SER ILE LYS VAL THR ILE SER LEU SEQRES 9 A 768 VAL ASP SER VAL LYS ASN ARG ASP VAL VAL GLN LEU MET SEQRES 10 A 768 ASN VAL ILE PHE LYS ARG ILE LEU ARG SER LEU LYS LEU SEQRES 11 A 768 GLN ARG ILE GLY ARG ASP TYR TYR ASP ALA ASN SER PRO SEQRES 12 A 768 LEU GLU VAL PRO GLN HIS LYS MET GLN LEU TRP PRO GLY SEQRES 13 A 768 TYR VAL THR ALA ILE ASN ARG HIS GLU GLY GLY LEU MET SEQRES 14 A 768 LEU VAL LEU ASP VAL SER HIS ARG VAL MET LYS THR ASP SEQRES 15 A 768 THR ALA LEU ASP PHE LEU TYR GLU LEU TYR HIS PHE ASN SEQRES 16 A 768 GLN ASP LYS PHE ARG GLU GLU ALA PHE LYS GLN LEU VAL SEQRES 17 A 768 GLY SER VAL VAL LEU THR ARG TYR ASN ASN ARG THR TYR SEQRES 18 A 768 GLU ILE ASP ASP ILE ALA TRP ASP LYS ASN PRO ARG CYS SEQRES 19 A 768 ALA PHE GLN ASP HIS ALA GLY SER GLN ILE THR PHE VAL SEQRES 20 A 768 ASP TYR TYR LYS ARG ALA TYR ASP LEU ASP ILE THR ASP SEQRES 21 A 768 LEU GLU GLN PRO LEU LEU ILE HIS ARG PRO LYS LYS LYS SEQRES 22 A 768 GLN ARG GLY LYS GLN ASP GLU GLY ARG LYS GLU VAL GLU SEQRES 23 A 768 GLU MET VAL CYS LEU VAL PRO GLU LEU CYS ALA MET THR SEQRES 24 A 768 GLY LEU THR ASP ALA ALA ARG SER ASP PHE LYS VAL MET SEQRES 25 A 768 LYS ASP LEU ALA VAL HIS THR ARG VAL PRO PRO GLU LYS SEQRES 26 A 768 ARG ALA GLU SER PHE ARG LYS PHE ILE GLN ARG LEU ASN SEQRES 27 A 768 THR THR LYS GLU ALA SER GLU LEU LEU HIS SER TRP GLY SEQRES 28 A 768 LEU VAL LEU ASP SER ARG MET LEU ASP MET GLN GLY ARG SEQRES 29 A 768 ARG LEU PRO PRO GLU LYS ILE LEU PHE LYS HIS SER SER SEQRES 30 A 768 ILE VAL ALA ASN MET GLU ALA ASP TRP SER ARG GLU CYS SEQRES 31 A 768 LEU LYS GLU HIS VAL ILE SER ALA VAL SER LEU LEU ASP SEQRES 32 A 768 TRP ALA VAL LEU PHE VAL ARG LYS ASP GLN GLY LYS ALA SEQRES 33 A 768 THR ASP PHE VAL ASN MET LEU SER LYS VAL CYS PRO PRO SEQRES 34 A 768 ILE GLY MET GLU VAL HIS GLU PRO LYS MET VAL GLU VAL SEQRES 35 A 768 VAL ASN ASP ARG THR GLU SER TYR LEU ARG ALA LEU ARG SEQRES 36 A 768 GLU LEU ILE ALA PRO ARG LEU GLN MET VAL VAL ILE VAL SEQRES 37 A 768 PHE PRO THR SER ARG ASP ASP ARG TYR SER ALA VAL LYS SEQRES 38 A 768 LYS LEU CYS CYS ILE GLU SER PRO ILE PRO SER GLN VAL SEQRES 39 A 768 LEU ILE ALA ARG THR ILE THR GLN GLN GLN LYS LEU ARG SEQRES 40 A 768 SER VAL ALA GLN LYS VAL ALA LEU GLN MET ASN ALA LYS SEQRES 41 A 768 LEU GLY GLY GLU LEU TRP ALA VAL GLU ILE PRO LEU LYS SEQRES 42 A 768 SER CYS MET VAL VAL GLY ILE ASP VAL TYR HIS ASP LYS SEQRES 43 A 768 SER TYR GLY ASN LYS SER ILE ALA GLY PHE VAL ALA SER SEQRES 44 A 768 THR ASN PRO SER PHE THR ARG TRP TYR SER ARG THR ALA SEQRES 45 A 768 MET GLN GLU GLN SER GLN GLU LEU ILE HIS GLU LEU LYS SEQRES 46 A 768 LEU CYS MET GLN ALA ALA LEU LYS LYS TYR ASN GLU MET SEQRES 47 A 768 ASN GLN SER LEU PRO GLU ARG ILE ILE VAL PHE ARG ASP SEQRES 48 A 768 GLY VAL GLY GLU GLY ARG GLU GLU TYR VAL SER GLU PHE SEQRES 49 A 768 GLU VAL PRO GLN PHE ASN SER CYS PHE SER ILE PHE GLY SEQRES 50 A 768 GLU ASN TYR CYS PRO LYS LEU ALA VAL VAL VAL VAL GLN SEQRES 51 A 768 LYS ARG ILE THR THR ARG ILE PHE GLY ARG SER GLY HIS SEQRES 52 A 768 SER TYR ASP ASN PRO PRO PRO GLY VAL ILE VAL ASP HIS SEQRES 53 A 768 THR ILE THR LYS SER TYR ASP PHE TYR LEU VAL SER GLN SEQRES 54 A 768 HIS VAL ARG GLN GLY THR VAL SER PRO THR TYR TYR ARG SEQRES 55 A 768 VAL ILE TYR ASP LYS SER GLY LEU LYS PRO ASP HIS LEU SEQRES 56 A 768 GLN ARG LEU THR TYR LYS LEU THR HIS MET TYR TYR ASN SEQRES 57 A 768 TRP PRO GLY THR ILE ARG THR PRO ALA PRO CYS ASN TYR SEQRES 58 A 768 ALA HIS LYS LEU ALA PHE LEU VAL GLY LYS SER LEU HIS SEQRES 59 A 768 ARG ASP PRO ALA HIS GLU LEU SER ASP ARG LEU PHE PHE SEQRES 60 A 768 LEU SEQRES 1 B 25 U C U C U U G A G U U G G SEQRES 2 B 25 A C A A A U G G C A G OMC HET OMC B 25 21 HET MG A1001 1 HET MG A1002 1 HETNAM OMC O2'-METHYLYCYTIDINE-5'-MONOPHOSPHATE HETNAM MG MAGNESIUM ION FORMUL 2 OMC C10 H16 N3 O8 P FORMUL 3 MG 2(MG 2+) HELIX 1 AA1 ASP A 267 GLU A 277 1 11 HELIX 2 AA2 HIS A 278 ILE A 282 5 5 HELIX 3 AA3 ARG A 330 LEU A 347 1 18 HELIX 4 AA4 ALA A 403 GLU A 409 1 7 HELIX 5 AA5 PHE A 465 ASP A 474 1 10 HELIX 6 AA6 PHE A 528 ARG A 539 1 12 HELIX 7 AA7 PRO A 541 ASN A 557 1 17 HELIX 8 AA8 THR A 559 GLY A 570 1 12 HELIX 9 AA9 ARG A 607 LYS A 611 5 5 HELIX 10 AB1 VAL A 628 LYS A 630 5 3 HELIX 11 AB2 ASP A 631 GLY A 650 1 20 HELIX 12 AB3 ARG A 665 GLU A 675 1 11 HELIX 13 AB4 ARG A 692 ILE A 705 1 14 HELIX 14 AB5 ARG A 717 ILE A 719 5 3 HELIX 15 AB6 LEU A 725 LEU A 740 1 16 HELIX 16 AB7 HIS A 801 GLN A 819 1 19 HELIX 17 AB8 TYR A 839 PHE A 852 1 14 HELIX 18 AB9 SER A 853 PHE A 855 5 3 HELIX 19 AC1 LYS A 930 LEU A 941 1 12 HELIX 20 AC2 PRO A 955 SER A 971 1 17 HELIX 21 AC3 ALA A 977 SER A 981 5 5 SHEET 1 AA112 TRP A 786 ALA A 791 0 SHEET 2 AA112 ILE A 772 SER A 778 -1 N PHE A 775 O ARG A 789 SHEET 3 AA112 CYS A 754 TYR A 762 -1 N GLY A 758 O VAL A 776 SHEET 4 AA112 ARG A 824 ARG A 829 1 O ILE A 826 N VAL A 757 SHEET 5 AA112 LYS A 862 GLN A 869 1 O ALA A 864 N VAL A 827 SHEET 6 AA112 THR A 918 ASP A 925 -1 O ARG A 921 N VAL A 867 SHEET 7 AA112 PHE A 903 VAL A 906 -1 N LEU A 905 O THR A 918 SHEET 8 AA112 VAL A 891 VAL A 893 -1 N VAL A 893 O TYR A 904 SHEET 9 AA112 MET A 580 ARG A 584 -1 N ARG A 583 O ILE A 892 SHEET 10 AA112 PRO A 237 ALA A 242 -1 N VAL A 238 O GLY A 582 SHEET 11 AA112 ILE A 876 ARG A 879 -1 O PHE A 877 N SER A 241 SHEET 12 AA112 TYR A 884 ASP A 885 -1 O ASP A 885 N GLY A 878 SHEET 1 AA2 5 TYR A 244 LEU A 247 0 SHEET 2 AA2 5 LEU A 387 VAL A 397 -1 O LEU A 387 N LEU A 247 SHEET 3 AA2 5 GLN A 371 ASN A 381 -1 N GLY A 375 O SER A 394 SHEET 4 AA2 5 ASP A 355 TYR A 357 -1 N TYR A 356 O TYR A 376 SHEET 5 AA2 5 GLN A 350 ILE A 352 -1 N GLN A 350 O TYR A 357 SHEET 1 AA3 4 TYR A 244 LEU A 247 0 SHEET 2 AA3 4 LEU A 387 VAL A 397 -1 O LEU A 387 N LEU A 247 SHEET 3 AA3 4 GLN A 371 ASN A 381 -1 N GLY A 375 O SER A 394 SHEET 4 AA3 4 LEU A 363 GLU A 364 -1 N LEU A 363 O LEU A 372 SHEET 1 AA4 4 VAL A 287 PHE A 288 0 SHEET 2 AA4 4 THR A 292 TYR A 294 -1 O TYR A 294 N VAL A 287 SHEET 3 AA4 4 PHE A 255 ALA A 258 -1 N TYR A 257 O LEU A 293 SHEET 4 AA4 4 ASP A 325 SER A 326 -1 O ASP A 325 N LYS A 256 SHEET 1 AA5 2 LEU A 306 SER A 308 0 SHEET 2 AA5 2 ILE A 317 VAL A 319 -1 O ILE A 317 N SER A 308 SHEET 1 AA6 2 LEU A 432 THR A 433 0 SHEET 2 AA6 2 CYS A 515 ALA A 516 -1 O ALA A 516 N LEU A 432 SHEET 1 AA7 2 ALA A 454 ASP A 457 0 SHEET 2 AA7 2 SER A 461 THR A 464 -1 O SER A 461 N ASP A 457 SHEET 1 AA8 2 LEU A 485 HIS A 487 0 SHEET 2 AA8 2 VAL A 508 LEU A 510 -1 O LEU A 510 N LEU A 485 SHEET 1 AA9 2 LYS A 589 LEU A 591 0 SHEET 2 AA9 2 SER A 596 VAL A 598 -1 O ILE A 597 N ILE A 590 SHEET 1 AB1 4 LYS A 657 GLU A 660 0 SHEET 2 AB1 4 ALA A 624 PHE A 627 1 N VAL A 625 O VAL A 659 SHEET 3 AB1 4 VAL A 684 PHE A 688 1 O VAL A 685 N ALA A 624 SHEET 4 AB1 4 SER A 711 ILE A 715 1 O LEU A 714 N PHE A 688 LINK O3' G B 24 P OMC B 25 1555 1555 1.61 LINK OD1 ASP A 830 MG MG A1002 1555 1555 3.00 LINK O LEU A 987 MG MG A1001 1555 1555 2.00 LINK OXT LEU A 987 MG MG A1001 1555 1555 1.96 LINK MG MG A1001 OP3 U B 1 1555 1555 2.32 LINK MG MG A1001 OP1 U B 3 1555 1555 1.95 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 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 1.000000 0.000000 0.000000 0.00000 SCALE2 0.000000 1.000000 0.000000 0.00000 SCALE3 0.000000 0.000000 1.000000 0.00000