HEADER ANTIVIRAL PROTEIN 26-NOV-25 9TEU TITLE OLIGOMERISATION OF TYPE III CRISPR-ASSOCIATED CSX15 TO REGULATE TITLE 2 ANTIVIRAL SIGNALLING COMPND MOL_ID: 1; COMPND 2 MOLECULE: CSX15; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: CHLOROBACULUM LIMNAEUM; SOURCE 3 ORGANISM_TAXID: 274537; SOURCE 4 GENE: BIU88_04620; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 6 EXPRESSION_SYSTEM_TAXID: 469008 KEYWDS RING NUCLEASE VIRAL DEFENSE COA, ANTIVIRAL PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR S.A.MCMAHON,H.CHI,S.GRAHAM,M.F.WHITE REVDAT 1 15-APR-26 9TEU 0 JRNL AUTH M.F.WHITE,S.A.MCMAHON,H.CHI,S.GRAHAM JRNL TITL THE CRISPR RING NUCLEASE CSX15 OLIGOMERISES ON CYCLIC JRNL TITL 2 NUCLEOTIDE BINDING TO REGULATE ANTIVIRAL DEFENCE. JRNL REF BIOCHEM.J. 2026 JRNL REFN ESSN 1470-8728 JRNL PMID 41911342 JRNL DOI 10.1042/BCJ20260019 REMARK 2 REMARK 2 RESOLUTION. 0.90 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX 2.0_5885 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 : GEOSTD + MONOMER LIBRARY + CDL V1.2 REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 0.90 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 30.56 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 1.340 REMARK 3 COMPLETENESS FOR RANGE (%) : 94.6 REMARK 3 NUMBER OF REFLECTIONS : 79610 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.157 REMARK 3 R VALUE (WORKING SET) : 0.156 REMARK 3 FREE R VALUE : 0.168 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.810 REMARK 3 FREE R VALUE TEST SET COUNT : 3828 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 30.5600 - 2.7000 1.00 3101 133 0.1654 0.1616 REMARK 3 2 2.7000 - 2.1400 1.00 3022 153 0.1696 0.1909 REMARK 3 3 2.1400 - 1.8700 1.00 2995 167 0.1561 0.1655 REMARK 3 4 1.8700 - 1.7000 1.00 2983 126 0.1556 0.1803 REMARK 3 5 1.7000 - 1.5800 1.00 2996 148 0.1415 0.1313 REMARK 3 6 1.5800 - 1.4900 1.00 2963 152 0.1333 0.1509 REMARK 3 7 1.4900 - 1.4100 1.00 2927 185 0.1382 0.1617 REMARK 3 8 1.4100 - 1.3500 1.00 2963 165 0.1337 0.1524 REMARK 3 9 1.3500 - 1.3000 1.00 2969 156 0.1295 0.1495 REMARK 3 10 1.3000 - 1.2500 1.00 2971 143 0.1293 0.1347 REMARK 3 11 1.2500 - 1.2100 1.00 2986 139 0.1302 0.1401 REMARK 3 12 1.2100 - 1.1800 1.00 2925 171 0.1267 0.1433 REMARK 3 13 1.1800 - 1.1500 1.00 2960 157 0.1248 0.1646 REMARK 3 14 1.1500 - 1.1200 1.00 2937 148 0.1256 0.1492 REMARK 3 15 1.1200 - 1.0900 1.00 3004 134 0.1340 0.1333 REMARK 3 16 1.0900 - 1.0700 1.00 2982 113 0.1358 0.1603 REMARK 3 17 1.0700 - 1.0500 1.00 2901 158 0.1437 0.1887 REMARK 3 18 1.0500 - 1.0300 1.00 3014 140 0.1602 0.1652 REMARK 3 19 1.0300 - 1.0100 1.00 2912 156 0.1685 0.1824 REMARK 3 20 1.0100 - 0.9900 1.00 2941 151 0.1842 0.1702 REMARK 3 21 0.9900 - 0.9800 1.00 2953 150 0.1965 0.2164 REMARK 3 22 0.9800 - 0.9600 0.97 2892 139 0.2313 0.2886 REMARK 3 23 0.9600 - 0.9500 0.88 2564 143 0.2475 0.2894 REMARK 3 24 0.9500 - 0.9400 0.80 2387 106 0.2770 0.3592 REMARK 3 25 0.9400 - 0.9200 0.71 2089 118 0.2979 0.2756 REMARK 3 26 0.9200 - 0.9100 0.63 1845 101 0.3124 0.3211 REMARK 3 27 0.9100 - 0.9000 0.54 1600 76 0.3404 0.3684 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 : 0.90 REMARK 3 K_SOL : NULL REMARK 3 B_SOL : NULL REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.079 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 17.900 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 13.25 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 : 0.010 1157 REMARK 3 ANGLE : 1.188 1596 REMARK 3 CHIRALITY : 0.084 175 REMARK 3 PLANARITY : 0.014 214 REMARK 3 DIHEDRAL : 16.802 451 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 9TEU COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 26-NOV-25. REMARK 100 THE DEPOSITION ID IS D_1292151722. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 03-MAY-25 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 8.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : DIAMOND REMARK 200 BEAMLINE : I03 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.7918 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : PIXEL REMARK 200 DETECTOR MANUFACTURER : DECTRIS EIGER2 XE 16M REMARK 200 INTENSITY-INTEGRATION SOFTWARE : XIA2 REMARK 200 DATA SCALING SOFTWARE : XIA2 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 79628 REMARK 200 RESOLUTION RANGE HIGH (A) : 0.900 REMARK 200 RESOLUTION RANGE LOW (A) : 41.600 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 94.6 REMARK 200 DATA REDUNDANCY : 6.200 REMARK 200 R MERGE (I) : 0.03600 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 16.8000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 0.90 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 0.92 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: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: PHASER REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 34.60 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.88 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 0.1 M TRIS PH 8.5 22 % V/V PEG SMEAR REMARK 280 BROAD, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 293K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,Y,-Z REMARK 290 3555 X+1/2,Y+1/2,Z 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 0.00000 REMARK 290 SMTRY2 2 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 3 1.000000 0.000000 0.000000 41.66500 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 16.26500 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 4 -1.000000 0.000000 0.000000 41.66500 REMARK 290 SMTRY2 4 0.000000 1.000000 0.000000 16.26500 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: 3460 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 13440 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -6.0 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 44.07008 REMARK 350 BIOMT2 2 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 42.35235 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 GLY A -6 REMARK 465 ALA A -5 REMARK 465 ASN A -4 REMARK 465 ALA A -3 REMARK 465 MET A -2 REMARK 465 ALA A -1 REMARK 465 HIS A 0 REMARK 465 MET A 1 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 LYS A 25 CE NZ DBREF1 9TEU A 1 132 UNP A0A1D8CX38_CHLLM DBREF2 9TEU A A0A1D8CX38 1 132 SEQADV 9TEU GLY A -6 UNP A0A1D8CX3 EXPRESSION TAG SEQADV 9TEU ALA A -5 UNP A0A1D8CX3 EXPRESSION TAG SEQADV 9TEU ASN A -4 UNP A0A1D8CX3 EXPRESSION TAG SEQADV 9TEU ALA A -3 UNP A0A1D8CX3 EXPRESSION TAG SEQADV 9TEU MET A -2 UNP A0A1D8CX3 EXPRESSION TAG SEQADV 9TEU ALA A -1 UNP A0A1D8CX3 EXPRESSION TAG SEQADV 9TEU HIS A 0 UNP A0A1D8CX3 EXPRESSION TAG SEQRES 1 A 139 GLY ALA ASN ALA MET ALA HIS MET ALA ILE GLN PRO LEU SEQRES 2 A 139 ILE LEU ASN PHE SER GLY HIS PRO VAL SER PRO GLY GLN SEQRES 3 A 139 GLN GLN ALA ILE GLU LYS HIS MET HIS TRP PRO SER SER SEQRES 4 A 139 SER VAL VAL ASP VAL ARG LEU GLY ASN VAL PRO GLU ASP SEQRES 5 A 139 ASN ASN PHE ALA ALA ALA ILE THR LYS ALA ILE GLU ARG SEQRES 6 A 139 ALA GLY LEU SER ARG GLU GLU TRP GLN THR THR PRO ILE SEQRES 7 A 139 VAL ALA VAL PRO ALA GLY TYR PRO ALA VAL TRP SER VAL SEQRES 8 A 139 ILE LEU ALA GLU LEU HIS GLY ARG LEU GLY HIS PHE PRO SEQRES 9 A 139 ASP VAL ALA ARG LEU ARG PRO THR GLN PRO GLY ALA SER SEQRES 10 A 139 GLU LYS TYR GLU VAL ALA GLU ILE LEU ASN LEU ARG GLU SEQRES 11 A 139 LEU ARG HIS ALA SER ARG SER LYS ARG FORMUL 2 HOH *219(H2 O) HELIX 1 AA1 SER A 16 HIS A 28 1 13 HELIX 2 AA2 ASN A 47 ALA A 59 1 13 HELIX 3 AA3 SER A 62 THR A 69 1 8 HELIX 4 AA4 TYR A 78 GLY A 94 1 17 HELIX 5 AA5 ASN A 120 SER A 130 1 11 SHEET 1 AA1 5 SER A 33 ASP A 36 0 SHEET 2 AA1 5 LEU A 6 ASN A 9 1 N ILE A 7 O VAL A 35 SHEET 3 AA1 5 ILE A 71 VAL A 74 1 O VAL A 74 N LEU A 8 SHEET 4 AA1 5 ASP A 98 PRO A 104 1 O ASP A 98 N ALA A 73 SHEET 5 AA1 5 TYR A 113 LEU A 119 -1 O LEU A 119 N VAL A 99 CRYST1 83.330 32.530 57.750 90.00 132.83 90.00 C 1 2 1 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 0.012000 0.000000 0.011124 0.00000 SCALE2 0.000000 0.030741 0.000000 0.00000 SCALE3 0.000000 0.000000 0.023611 0.00000 MASTER 243 0 0 5 5 0 0 6 1240 1 0 11 END