2026-06-17 REL PDBe 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 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 Biorxiv US 2026 42239233 doi:10.64898/2026.05.18.725949 2692-8205 EMD-57738 consensus EM volume EMD-57737 focused EM volume

TnsC focused

30gb FULLOVERLAP EMDB EMD-57738 consensus EM volume EMDB EMD-57737 focused EM volume

TnsC focused

EMDB EMD-57739 associated EM volume

Cryo-EM structure of the PseCascade-TniQ-TnsC complex bound to PseTnsB-hook motifs

PseCascade-TniQ-TnsC complex bound to PseTnsB-hook motifs PseCascade-TniQ-TnsC complex bound to PseTnsB-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 CRISPR RNA Pseudoalteromonas sp. S983 0.030196002

CRISPR RNA (crRNA) from the type I-F PseCAST (Tn7016) Cascade complex of Pseudoalteromonas sp. S983.

1 GUGACCUGCCGUAUAGGCAGCUGAAAAUACAGUGGGGCCACUAGGGACAGGAUUGGUGACGUGACCUGCCGUAUAGGCAG CUGAAAAUGUAGC Target DNA strand Pseudoalteromonas sp. S983 0.037162676

Target DNA strand complementary to the crRNA spacer sequence.

1 (DG)(DC)(DC)(DT)(DA)(DA)(DC)(DA)(DG)(DG)(DA)(DG)(DG)(DT)(DG)(DC)(DG)(DC)(DG)(DT) (DT)(DA)(DG)(DG)(DC)(DC)(DC)(DA)(DA)(DT)(DA)(DT)(DC)(DA)(DG)(DG)(DA)(DG)(DA)(DC) (DT)(DA)(DG)(DG)(DA)(DA)(DG)(DG)(DA)(DG)(DG)(DA)(DG)(DG)(DC)(DC)(DT)(DA)(DA)(DG) (DG)(DA)(DT)(DG)(DC)(DG)(DC)(DC)(DT)(DT)(DT)(DT)(DC)(DT)(DG)(DT)(DC)(DA)(DC)(DC) (DA)(DA)(DT)(DC)(DC)(DT)(DG)(DT)(DC)(DC)(DC)(DT)(DA)(DG)(DT)(DG)(DG)(DC)(DC)(DC) (DC)(DA)(DC)(DT)(DG)(DT)(DG)(DG)(DC)(DG)(DT)(DG)(DG)(DA)(DC)(DG)(DC)(DA)(DT)(DG) DNA Non-target DNA strand Pseudoalteromonas sp. S983 0.036726366999999996

Non-target DNA strand containing a +1 to +18 region identical to the target DNA strand, rather than complementary, to facilitate crRNA annealing to the protospacer.

1 (DC)(DA)(DT)(DG)(DC)(DG)(DT)(DC)(DC)(DA)(DC)(DG)(DC)(DC)(DT)(DG)(DT)(DC)(DA)(DC) (DC)(DC)(DC)(DG)(DG)(DT)(DG)(DA)(DT)(DC)(DC)(DC)(DA)(DC)(DA)(DG)(DG)(DA)(DT)(DT) (DG)(DG)(DT)(DG)(DA)(DC)(DA)(DG)(DA)(DA)(DA)(DA)(DG)(DG)(DC)(DG)(DC)(DA)(DT)(DC) (DC)(DT)(DT)(DA)(DG)(DG)(DC)(DC)(DT)(DC)(DC)(DT)(DC)(DC)(DT)(DT)(DC)(DC)(DT)(DA) (DG)(DT)(DC)(DT)(DC)(DC)(DT)(DG)(DA)(DT)(DA)(DT)(DT)(DG)(DG)(DG)(DC)(DC)(DT)(DA) (DA)(DC)(DG)(DC)(DG)(DC)(DA)(DC)(DC)(DT)(DC)(DC)(DT)(DG)(DT)(DT)(DA)(DG)(DG)(DC) DNA Cas7.1 Pseudoalteromonas sp. S983 0.03984514499999999

CRISPR-associated protein Cas7 from the type I-F PseCAST (Tn7016) Cascade complex of Pseudoalteromonas sp. S983.

6 Escherichia coli BL21(DE3) LEVO MELCNILKYDRSLYPGKAVFFYKTADSDFVPLEADINKIRGPKSGFTEAFTPQFSPKNISPQDLTHNNILTLEECYVPPN VEHIFCRFSLRVQANSLVPSGCSDPEVFSLLKELAETFKECGGYKELAVRYCRNILIGTWLWRNQNTGNTQIEIKTSKGS CYLIDNTRKLAWESKWASDDLKVLEELSNEIESALTDPNVFWSADITAKIEASFCQEIYPSQILNDKVKQGEASKQFVKA KCADGRYAVSFNSVKIGAALQSIDDWWDEDASKRLRVHEFGADKEIGVARRPPDSEQNFYSIFKNTEWYLSALKNCITNK NEKIDPAIYYLFSVLIKGGMFQKKAEAKKA A0ABF7PQB9 Cas8 Pseudoalteromonas sp. S983 0.07929021099999999

CRISPR-associated protein Cas8 from the type I-F PseCAST (Tn7016) Cascade complex of Pseudoalteromonas sp. S983.

1 Escherichia coli BL21(DE3) LEVO MHLKELLEITDTTERDRSLRRAFSPYTAMIDITGSEAVALIILLNLTYRKNQVDDLLDKKLAKQALKSEDHINKCIKEIA WFHTHNLKYPDIRVSKQNLAVEPPTLHSYVLSSANYPKAYGWSHNSAKVNFAKLFVSYFKWQNQVSWLAQVLATNSDNWK SAFTSLGLSVKAFKSLCVTVKNSLPEEAIPDSVDRYSRQIRMPYHDGYLAVTPVISHVVQSKIQQAAIDKRARFSNVEFT RPAAVSMLAASLGGVINVLNYPPYIRSKYHGLSNSRAFKLNNGQTVFNVEALLKPELIKALEGIIFSNNALALKQRRQQK VKNIKELRNTLLEWFSPVFEWRLDAIENGYDLEQLESASERLEYKILSLPDNELPSLTIPLFRLLNEMLGGVSMTQRYAF HPKLMSPLKAALQWLLVNLTDQKHVLIEEDDEHYRYLHLSGIRVFDAQALSNPYCSGIPSLTAVWGMIHSYQRKLNEALG TNVRFTSFSWFIRNYSAVAGKKLPELSLQGAQQSRLKRPGIIDGKYCDLVFDLIIHIDGYEDDLQAVDSKPDILKAHFPS NFAGGVMHQPELNSNINWCCLYSNENQLFEKLRRLPLSGCWVMPTEHKIQDLDELLLLLNSDSKLSPSMMGYMLLTEPMA RVGSLERLHCYAEPAIGVVKYEAATSVRLKGIGNYFNSAFWMLDAQEKFMLMKKV A0ABF7PQB8 Cas6 Pseudoalteromonas sp. S983 0.026631073999999998

CRISPR-associated protein Cas6 from the type I-F PseCAST (Tn7016) Cascade complex of Pseudoalteromonas sp. S983, bearing a C-terminal Twin-Strep tag.

1 Escherichia coli BL21(DE3) LEVO MQRYYFTVHFLPKQANLALLTGRCISIMHGFILKHNIEGMGVTFPAWSDSSIGNEIAFVYTDKEILNTLKDQAYFVDMQD CGFFKVSQVLAVPDSCEEVRFIRNQAVAKIFTGESRRRLKRLQKRALARGEDFNPKKIEAPREIDIFHRVAMTSKSSQED YILHIQKQDVDCQAEPYFSNYGLASNEKFKGTVPDLSPSIDRNSAWSHPQFEKGGGSGGGSGGSAWSHPQFEKSGGG A0ABF7PQC0 TniQ.1 Pseudoalteromonas sp. S983 0.049832406

CRISPR-associated protein TniQ from the type I-F PseCAST (Tn7016) system of Pseudoalteromonas sp. S983, bearing an N-terminal His10 tag followed by a TEV protease cleavage site.

2 Escherichia coli BL21(DE3) LEVO MGHHHHHHHHHHGGSENLYFQSGMAFLFSPKARAFSDESLESYLLRVVSENFFDSYEGLSLAIREELHELDFEAHGAFPV DLKRLNVYHAKHNSHFRMRALGLLETLLDLPRYELQKLALLKSDIKFNSSVALYNNGVDIPLRFIRHHAEEAVDSIPVCS QCLAEEAYIKQSWHIKWVNACTKHQCALLHNCPECYAPINYIENESITHCSCGFELSCASTSPVNTLSIEHLNKLLDKGE RNDSNPLFNNMTLTERFAALLWYQERYSQTDNFCLNDAVNYFSKWPAVFNTELDELSKNAEMKLIDLFNKTEFKFIFGDA ILACPSTQKQSESHFIYRALLDYLVTLVESNPKTKKPNAADLLVSVLEAATLLGTSVEQVYRLYQNGILQTAFRHKMNQR INPYKGAFFLRHVIEYKTSFGNDKARMYLSAW A0ABF7PQC1 AAA+ ATPase domain-containing protein Pseudoalteromonas sp. S983 0.038609902

AAA+ ATPase TnsC from the type I-F PseCAST (Tn7016) system of Pseudoalteromonas sp. S983.

7 Escherichia coli BL21(DE3) LEVO MNALTEIQIEKLRNFSDCIVMHPQIKTIFNDFDELRLNRKFQSDQQCMLLIGDTGVGKSHTINHYKKRVLATQNYSRNTM PVLVSRISRGKGLDATLVQMLADLELFGSSQIKKRGYKTDLTKKLVESLIKAQVELLIINEFQELIEFKSVQERQQIANG LKFISEEAKVPIVLVGMPWAAKIAEEPQWASRLVRKRKLEYFSLKNDSKYFRQYLMGLAKKMPFDVPPKLESKNTTIALF AACRGENRALKHLLLEALKLALSCNEYLENKHFITAYDKFDFFNDKEKLKSKNPFKQDIKDIEIYEVIKNSSYNPNALDP EDMLTDRVFAIVK A0A290S0Z4 Maltose/maltodextrin-binding periplasmic protein,TnsA endonuclease N-terminal domain-containing protein,TnsB transposase Pseudoalteromonas sp. S983 0.142301844

C-terminal hook motif of TnsB, part of the TnsA-TnsB fusion protein. The fusion protein is composed of TnsA (res 1-209, NCBI Reference Sequence WP_249364174.1) and TnsB (res 239-613, NCBI Reference Sequence TMP85090.1) from the type I-F PseCAST (Tn7016) system of Pseudoalteromonas sp. S983, connected by a synthetic NLS linker (res 210-238) and bearing an N-terminal His6-MBP tag followed by a TEV protease cleavage site. The hook comprises residues 605-613 of TnsB (843-851 of the TnsA-TnsB fusion).,C-terminal hook motif of TnsB, part of the TnsA-TnsB fusion protein. The fusion protein is composed of TnsA (res 1-209, NCBI Reference Sequence WP_249364174.1) and TnsB (res 239-613, NCBI Reference Sequence TMP85090.1) from the type I-F PseCAST (Tn7016) system of Pseudoalteromonas sp. S983, connected by a synthetic NLS linker (res 210-238) and bearing an N-terminal His6-MBP tag followed by a TEV protease cleavage site. The hook comprises residues 605-613 of TnsB (843-851 of the TnsA-TnsB fusion).,C-terminal hook motif of TnsB, part of the TnsA-TnsB fusion protein. The fusion protein is composed of TnsA (res 1-209, NCBI Reference Sequence WP_249364174.1) and TnsB (res 239-613, NCBI Reference Sequence TMP85090.1) from the type I-F PseCAST (Tn7016) system of Pseudoalteromonas sp. S983, connected by a synthetic NLS linker (res 210-238) and bearing an N-terminal His6-MBP tag followed by a TEV protease cleavage site. The hook comprises residues 605-613 of TnsB (843-851 of the TnsA-TnsB fusion).

7 Escherichia coli BL21(DE3) LEVO MGSSHHHHHHGSSMKIEEGKLVIWINGDKGYNGLAEVGKKFEKDTGIKVTVEHPDKLEEKFPQVAATGDGPDIIFWAHDR FGGYAQSGLLAEITPDKAFQDKLYPFTWDAVRYNGKLIAYPIAVEALSLIYNKDLLPNPPKTWEEIPALDKELKAKGKSA LMFNLQEPYFTWPLIAADGGYAFKYENGKYDIKDVGVDNAGAKAGLTFLVDLIKNKHMNADTDYSIAEAAFNKGETAMTI NGPWAWSNIDTSKVNYGVTVLPTFKGQPSKPFVGVLSAGINAASPNKELAKEFLENYLLTDEGLEAVNKDKPLGAVALKS YEEELAKDPRIAATMENAQKGEIMPNIPQMSAFWYAVRTAVINAASGRQTVDEALKDAQTNSSSNNNNNNNNNNLGIEEN LYFQSNAMYIRNLRKPSPNKNVFKFASTKVSSVVMCESSLEFDACFHHEYNDLIESFGSQPEGFKYEFMGKSLPYTPDAL ISYTDKTQKYHEYKPYSKIASPLFRAEFAAKRAASLKLGIDLVLVTDRQIRVNPILNNLKLLHRYSGVYGISGIQKELLS FIHKSGVIKLNDISSQVGIPIGETRSFLFGLMHKGLVKADLGCDDLTNNPTLWATPGSGSGKRTADGSEFESPKKKRKVG SGSGGMTDFFNEFDESLVPLKPQTPTQYVKLDDANLIQRDLDTFSDTFKNQALQRYKLISTIDKKLSRGWTQRNLDPILD ELFKGGDVVRPNWRTVARWRKKYIESNGDIASLADKNHKMGNRTNRIKGDDKFFDKALERFLDAKRPTIATAYQYYKDLI VIENESIVEGKIPIISYNAFNKRIKAIPPYAVAVARHGKFKADQWFAYCAAHVPPTRILERVEIDHTPLDLILLDDELLI PIGRPYLTLLIDVFSGCVLGFHLSYKSPSYVSAAKAITHAIKPKSLDALNIELQNDWPCFGKFENLVVDNGAEFWSKNLE HACQSAGINIQYNPVRKPWLKPFIERFFGVMNEYFLPELPGKTFSNILEKEEYKPEKDAIMRFSTFVEEFHRWIADVYHQ DSNSRETRIPIKRWQQGFDAYPPLTMNEEEETRFSMLMRISDSRTLTRNGFKYQELMYDSTALADYRKHYPQTKETVKKL IKVDPDDISKIYVYLEELESYLEVPCTDPTGYTDGLSIYEHKTIKKINREVIRESKDSLGLAKARMAIHERVKQEQEVFI ESKTKAKITAVKKQAQIADVSNTGTSTIKVSEESAAPVQKHISNDNSDDWDDDLEAFE P0AEX9 ADENOSINE-5'-TRIPHOSPHATE 0.000507181 7 ATP MAGNESIUM ION 2.4305e-05 7 MG 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 60 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 2.9 FSC 0.143 CUT-OFF cryoSPARC 4.7 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 AlphaFold in silico model FLEXIBLE FIT Real-space map-model correlation and geometry restraints REAL