2026-06-17 REL PDBe INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY PDBe PDBe 2026-04-23 2026-06-17 2026-06-17 2026-06-17 European Research Council (ERC) 820152 European Union Swiss National Science Foundation 320030-228089 Switzerland TnsC-focused cryo-EM volume of the PseCascade-TniQ-TnsC complex bound to TnsB-hook motifs Finocchio G Oberli S Schmitz M Jinek M Transposase, DNA-binding, RNA-binding, CRISPR-Cas, CRISPR-associated transposon, DNA BINDING PROTEIN Finocchio G Oberli S Lampe G Schmitz M Sternberg SH Jinek M Structural basis of RNA-guided DNA integration by type I CRISPR-associated transposases. Biorxiv US 2026 42239233 doi:10.64898/2026.05.18.725949 2692-8205 EMDB EMD-57737 associated EM volume PseCascade-TniQ-TnsC complex bound to TnsB-hook motifs PseCascade-TniQ-TnsC complex bound to TnsB-hook motifs 0 1 2 3 4 5 6 7 8 9
PseCascade-TniQ-TnsC complex bound to seven C-terminal PseTnsB-hooks. The CRISPR RNA (crRNA) is base-paired with a double-stranded DNA target. The hook comprises residues 605-613 of TnsB (843-851 of the TnsA-TnsB fusion).
Pseudoalteromonas sp. S983 0.74 singleParticle particle 2.6 7.5 20.0 C8H17KN2O4S HEPES potassium salt 10.0 MgCl2 magnesium chloride 300.0 KCl potassium chloride 1.0 C4H10O2S2 dithiothreitol 0.025 C58H114O26 polysorbate 20 (Tween 20) 1.0 C10H14N5Na2O13P3 adenosin-5'-triphosphate disodium salt 10.0 C12H22O11 maltose Quantifoil R1.2/1.3 GOLD 300 GLOW DISCHARGE AIR 0.039 ETHANE-PROPANE 100 277.15 FEI VITROBOT MARK IV
The sample was prepared by co-precipitation, using His-MBP-tagged TnsAB bound to a double-stranded right-end substrate as bait to capture Cascade-TniQ and TnsC.
 TFS KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 1.0 2.4 130000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN GATAN K3 (6k x 4k) SUPER-RESOLUTION 5760 4092 1 11374 1.25 60.95 1 329059 cryoSPARC 4.7 Patch CTF Estimation was used for CTF correction PHASE FLIPPING AND AMPLITUDE CORRECTION AlphaFold 3 models of the individual chains were rigid-body fitted into the cryo-EM density map. FOURIER SPACE 3.0 FSC 0.143 CUT-OFF cryoSPARC 4.7 Local Refinement was used fo final reconstruction 138834 MAXIMUM LIKELIHOOD cryoSPARC 4.7 Ab-Initio Reconstruction was used for initial angular assignment MAXIMUM LIKELIHOOD cryoSPARC 4.7 Non-Uniform Refinement was used fo final angular assignment 2 cryoSPARC 4.7 Ab-Initio Reconstruction was used for final classification emd_57737.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 600 600 600 0 0 0 600 600 600 390.0 390.0 390.0 90.0 90.0 90.0 X Y Z -0.13313262 0.40735316 0.0008109587 0.009730451 0.65 0.65 0.65 0.057 AUTHOR AlphaFold in silico model FLEXIBLE FIT Real-space map-model correlation and geometry restraints REAL 83.700000000000003 emd_57737_msk_1.map emd_57737_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 600 600 600 0 0 0 600 600 600 390.0 390.0 390.0 90.0 90.0 90.0 X Y Z -1.1258589 1.0850412 0.0007029958 0.11805905 0.65 0.65 0.65 AUTHOR emd_57737_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 600 600 600 0 0 0 600 600 600 390.0 390.0 390.0 90.0 90.0 90.0 X Y Z -1.0004696 1.1731412 0.0007050959 0.11798723 0.65 0.65 0.65 AUTHOR