2026-09-02 REL PDBe INITIAL_RELEASE REPOSITORY PDBe PDBe 2026-06-11 2026-09-02 2026-09-02 2026-09-02 H2020 Marie Curie Actions of the European Commission 101153345 European Union Netherlands Organisation for Scientific Research (NWO) OCENW.XL21.XL21.048 Netherlands Discodermolide stabilised 13-protofilament microtubule C1 reconstruction Gravett MSC Howes SC Pelster Jose A microtubule, cytoskeleton, filament, compact, stable, chemotherapeutic, cell division, transport, Tubulin, alpha-tubulin, beta-tubulin, Heterodimer, Protofilament, GTP-binding protein, Cytoskeletal protein, Discodermolide, Polyketide natural product, Marine natural product, Taxane-site ligand, Microtubule-stabilizing agent, Lactone, Carbamate, Microtubule stabilization, Microtubule dynamics, Mitotic arrest, Cell cycle inhibition, Spindle assembly, Antimitotic agent, Cytoskeleton regulation, Tubulin polymerization, Anticancer, Antitumor, Cancer therapy, Drug-tubulin interaction, Chemotherapeutic agent, Cryo-EM, Helical reconstruction, Drug binding site, Protein-ligand complex, Taxane binding pocket, Lumenal binding, STRUCTURAL PROTEIN Meiring JCM Mahapatra V Liu RR Gravett MSC Morren D Saunders HAJ Choi SR Pelster Jose A Karhanova A Metallidou I Moore A Spoelstra MFM Grigoriev IS Giono M Iyer SS Stehbens SJ Diaz JF Lansky Z Stecker KE Steinmetz MO Howes SC Kapitein LC Akhmanova A Taxane-Induced Conformational Changes in the Microtubule Lattice Activate GEF-H1-Dependent RhoA Signaling bioRxiv US 2025 doi:10.64898/2025.12.20.695343 2692-8205 0353 EMD-58507 other EM volume EMDB EMD-58507 other EM volume EMDB EMD-58509 associated EM volume Microtubule Microtubule 0 1 2 Sus scrofa 183 Tubulin alpha-1B chain Sus scrofa LEVO MRECISIHVGQAGVQIGNACWELYCLEHGIQPDGQMPSDKTIGGGDDSFNTFFSETGAGKHVPRAVFVDLEPTVIDEVRTGTYRQLFHPEQLITGKEDAANNYARGHYTIGKEIIDLVLDRIRKLADQCTGLQGFLVFHSFGGGTGSGFTSLLMERLSVDYGKKSKLEFSIYPAPQVSTAVVEPYNSILTTHTTLEHSDCAFMVDNEAIYDICRRNLDIERPTYTNLNRLISQIVSSITASLRFDGALNVDLTEFQTNLVPYPRIHFPLATYAPVISAEKAYHEQLSVAEITNACFEPANQMVKCDPRHGKYMACCLLYRGDVVPKDVNAAIATIKTKRSIQFVDWCPTGFKVGINYQPPTVVPGGDLAKVQRAVCMLSNTTAIAEAWARLDHKFDLMYAKRAFVHWYVGEGMEEGEFSEAREDMAALEKDYEEVGVDSVEGEGEEEGEEY Tubulin beta chain Sus scrofa LEVO MREIVHIQAGQCGNQIGAKFWEVISDEHGIDPTGSYHGDSDLQLERINVYYNEAAGNKYVPRAILVDLEPGTMDSVRSGPFGQIFRPDNFVFGQSGAGNNWAKGHYTEGAELVDSVLDVVRKESESCDCLQGFQLTHSLGGGTGSGMGTLLISKIREEYPDRIMNTFSVVPSPKVSDTVVEPYNATLSVHQLVENTDETYCIDNEALYDICFRTLKLTTPTYGDLNHLVSATMSGVTTCLRFPGQLNADLRKLAVNMVPFPRLHFFMPGFAPLTSRGSQQYRALTVPELTQQMFDAKNMMAACDPRHGRYLTVAAVFRGRMSMKEVDEQMLNVQNKNSSYFVEWIPNNVKTAVCDIPPRGLKMSATFIGNSTAIQELFKRISEQFTAMFRRKAFLHWYTGEGMDEMEFTEAESNMNDLVSEYQQYQDATADEQGEFEEEGEEDEA singleParticle filament 0.22 6.8 80.0 C8H18N2O6S2 PIPES 1.0 C14H24N2O10 EGTA 4.0 MgCl2 Magnesium chloride 2.0 C10H16N5O14P3 GTP 0.1 C33H55NO8 discodermolide
polymerised in MRB80 (80 mM Pipes, 1 mM EGTA, 4 mM MgCl2, pH 6.80 with KOH), 0.1 mM discodermolide and 2 mM GTP. Pelleted and resuspended in MRB80 and 0.1 mM discodermolide.
 Quantifoil R3.5/1 COPPER 200 CARBON HOLEY GLOW DISCHARGE AIR 39.0
25 mA
 ETHANE 95 303.15 LEICA EM GP
Leica EM GP2 Back-side blotting 1.5s.
TFS KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 50.0 2.7 0.6 2.0 105000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN 20 GATAN K3 (6k x 4k) 1 8513 1.82 50.0 1 820009
Separation distance set to the length of a single dimer 82 angstroms (0.33).
 cryoSPARC PHASE FLIPPING AND AMPLITUDE CORRECTION
https://www.dropbox.com/scl/fi/c9cd7tbo184oe9lmqs6bv/14pf_apix2.8_box200.mrc?rlkey=x9i7vaq2k9xydnlrc60kvy7xe&dl=0 initial model provided by Rui Zhang, pixel and box size adjusted using relion image handler.
 3.47 FSC 0.143 CUT-OFF cryoSPARC 164768 RANDOM ASSIGNMENT cryoSPARC
Initial angle assignment from filament tracer
 MAXIMUM LIKELIHOOD cryoSPARC 6 cryoSPARC
Classification into different protofilament number classes (11-16). This map is the 14 protofilament class.
 emd_58509.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 576 576 576 0 0 0 576 576 576 489.024 489.024 489.024 90.0 90.0 90.0 X Y Z -0.045990724 0.15588206 0.0017443806 0.011514421 0.849 0.849 0.849 0.05 AUTHOR discodermolide bound 13-protofilament microtubule C1 reconstruction - sharpened map emd_58509_msk_1.map emd_58509_additional_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 576 576 576 0 0 0 576 576 576 489.024 489.024 489.024 90.0 90.0 90.0 X Y Z -0.039557792 0.14358342 0.0017443807 0.011261624 0.849 0.849 0.849 AUTHOR discodermolide bound 13-protofilament microtubule C1 reconstruction - unsharpened map emd_58509_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 576 576 576 0 0 0 576 576 576 489.024 489.024 489.024 90.0 90.0 90.0 X Y Z -0.3211456 0.3276972 0.00037231363 0.039237887 0.849 0.849 0.849 AUTHOR discodermolide bound 13-protofilament microtubule C1 reconstruction - half map B emd_58509_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 576 576 576 0 0 0 576 576 576 489.024 489.024 489.024 90.0 90.0 90.0 X Y Z -0.31001413 0.2967036 0.00037012825 0.039327633 0.849 0.849 0.849 AUTHOR discodermolide bound 13-protofilament microtubule C1 reconstruction - half map A