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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-23615 | |||||||||
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Title | HeLa-tubulin in complex with cryptophycin 1 | |||||||||
![]() | Hela-tubulin in complex with cryptophycin 1 | |||||||||
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![]() | anti-tumor / microtubule / tubulin-rings / polymerization-inhibitor / CELL CYCLE | |||||||||
Function / homology | ![]() netrin receptor binding / Post-chaperonin tubulin folding pathway / dorsal root ganglion development / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Carboxyterminal post-translational modifications of tubulin / Sealing of the nuclear envelope (NE) by ESCRT-III / Intraflagellar transport / cytoskeleton-dependent intracellular transport / Formation of tubulin folding intermediates by CCT/TriC ...netrin receptor binding / Post-chaperonin tubulin folding pathway / dorsal root ganglion development / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Carboxyterminal post-translational modifications of tubulin / Sealing of the nuclear envelope (NE) by ESCRT-III / Intraflagellar transport / cytoskeleton-dependent intracellular transport / Formation of tubulin folding intermediates by CCT/TriC / Gap junction assembly / COPI-independent Golgi-to-ER retrograde traffic / Prefoldin mediated transfer of substrate to CCT/TriC / Assembly and cell surface presentation of NMDA receptors / Kinesins / COPI-dependent Golgi-to-ER retrograde traffic / intercellular bridge / cytoplasmic microtubule / Recycling pathway of L1 / microtubule-based process / RHOH GTPase cycle / RHO GTPases activate IQGAPs / cellular response to interleukin-4 / Hedgehog 'off' state / COPI-mediated anterograde transport / Activation of AMPK downstream of NMDARs / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / Recruitment of NuMA to mitotic centrosomes / Resolution of Sister Chromatid Cohesion / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / MHC class II antigen presentation / filopodium / axon guidance / cell periphery / Translocation of SLC2A4 (GLUT4) to the plasma membrane / RHO GTPases Activate Formins / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / peptide binding / PKR-mediated signaling / structural constituent of cytoskeleton / mitotic spindle / microtubule cytoskeleton organization / Aggrephagy / HCMV Early Events / Separation of Sister Chromatids / The role of GTSE1 in G2/M progression after G2 checkpoint / microtubule cytoskeleton / double-stranded RNA binding / lamellipodium / mitotic cell cycle / growth cone / microtubule / cell division / axon / GTPase activity / neuronal cell body / ubiquitin protein ligase binding / dendrite / GTP binding / structural molecule activity / extracellular exosome / nucleus / metal ion binding / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.38 Å | |||||||||
![]() | Eren E | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Conformational changes in tubulin upon binding cryptophycin-52 reveal its mechanism of action. Authors: Elif Eren / Norman R Watts / Dan L Sackett / Paul T Wingfield / ![]() Abstract: Cryptophycin-52 (Cp-52) is potentially the most potent anticancer drug known, with IC values in the low picomolar range, but its binding site on tubulin and mechanism of action are unknown. Here, we ...Cryptophycin-52 (Cp-52) is potentially the most potent anticancer drug known, with IC values in the low picomolar range, but its binding site on tubulin and mechanism of action are unknown. Here, we have determined the binding site of Cp-52, and its parent compound, cryptophycin-1, on HeLa tubulin, to a resolution of 3.3 Å and 3.4 Å, respectively, by cryo-EM and characterized this binding further by molecular dynamics simulations. The binding site was determined to be located at the tubulin interdimer interface and partially overlap that of maytansine, another cytotoxic tubulin inhibitor. Binding induces curvature both within and between tubulin dimers that is incompatible with the microtubule lattice. Conformational changes occur in both α-tubulin and β-tubulin, particularly in helices H8 and H10, with distinct differences between α and β monomers and between Cp-52-bound and cryptophycin-1-bound tubulin. From these results, we have determined: (i) the mechanism of action of inhibition of both microtubule polymerization and depolymerization, (ii) how the affinity of Cp-52 for tubulin may be enhanced, and (iii) where linkers for targeted delivery can be optimally attached to this molecule. | |||||||||
History |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 10.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 13.8 KB 13.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 18.2 KB | Display | ![]() |
Images | ![]() | 152.7 KB | ||
Filedesc metadata | ![]() | 6 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7m18MC ![]() 7lxbC ![]() 7m20C C: citing same article ( M: atomic model generated by this map |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | Hela-tubulin in complex with cryptophycin 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.06 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : complex of tubulin with cryptophycin 1
Entire | Name: complex of tubulin with cryptophycin 1 |
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Components |
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-Supramolecule #1: complex of tubulin with cryptophycin 1
Supramolecule | Name: complex of tubulin with cryptophycin 1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 880 KDa |
-Macromolecule #1: Tubulin beta-3 chain
Macromolecule | Name: Tubulin beta-3 chain / type: protein_or_peptide / ID: 1 / Number of copies: 8 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 50.48152 KDa |
Sequence | String: MREIVHIQAG QCGNQIGAKF WEVISDEHGI DPSGNYVGDS DLQLERISVY YNEASSHKYV PRAILVDLEP GTMDSVRSGA FGHLFRPDN FIFGQSGAGN NWAKGHYTEG AELVDSVLDV VRKECENCDC LQGFQLTHSL GGGTGSGMGT LLISKVREEY P DRIMNTFS ...String: MREIVHIQAG QCGNQIGAKF WEVISDEHGI DPSGNYVGDS DLQLERISVY YNEASSHKYV PRAILVDLEP GTMDSVRSGA FGHLFRPDN FIFGQSGAGN NWAKGHYTEG AELVDSVLDV VRKECENCDC LQGFQLTHSL GGGTGSGMGT LLISKVREEY P DRIMNTFS VVPSPKVSDT VVEPYNATLS IHQLVENTDE TYCIDNEALY DICFRTLKLA TPTYGDLNHL VSATMSGVTT SL RFPGQLN ADLRKLAVNM VPFPRLHFFM PGFAPLTARG SQQYRALTVP ELTQQMFDAK NMMAACDPRH GRYLTVATVF RGR MSMKEV DEQMLAIQSK NSSYFVEWIP NNVKVAVCDI PPRGLKMSST FIGNSTAIQE LFKRISEQFT AMFRRKAFLH WYTG EGMDE MEFTEAESNM NDLVSEYQQY QDATAEEEGE MYEDDEEESE AQGPK UniProtKB: Tubulin beta-3 chain |
-Macromolecule #2: Tubulin alpha-1B chain
Macromolecule | Name: Tubulin alpha-1B chain / type: protein_or_peptide / ID: 2 / Number of copies: 8 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 50.204445 KDa |
Sequence | String: MRECISIHVG QAGVQIGNAC WELYCLEHGI QPDGQMPSDK TIGGGDDSFN TFFSETGAGK HVPRAVFVDL EPTVIDEVRT GTYRQLFHP EQLITGKEDA ANNYARGHYT IGKEIIDLVL DRIRKLADQC TGLQGFLVFH SFGGGTGSGF TSLLMERLSV D YGKKSKLE ...String: MRECISIHVG QAGVQIGNAC WELYCLEHGI QPDGQMPSDK TIGGGDDSFN TFFSETGAGK HVPRAVFVDL EPTVIDEVRT GTYRQLFHP EQLITGKEDA ANNYARGHYT IGKEIIDLVL DRIRKLADQC TGLQGFLVFH SFGGGTGSGF TSLLMERLSV D YGKKSKLE FSIYPAPQVS TAVVEPYNSI LTTHTTLEHS DCAFMVDNEA IYDICRRNLD IERPTYTNLN RLISQIVSSI TA SLRFDGA LNVDLTEFQT NLVPYPRIHF PLATYAPVIS AEKAYHEQLS VAEITNACFE PANQMVKCDP RHGKYMACCL LYR GDVVPK DVNAAIATIK TKRSIQFVDW CPTGFKVGIN YQPPTVVPGG DLAKVQRAVC MLSNTTAIAE AWARLDHKFD LMYA KRAFV HWYVGEGMEE GEFSEAREDM AALEKDYEEV GVDSVEGEGE EEGEEY UniProtKB: Tubulin alpha-1B chain |
-Macromolecule #3: Cryptophycin 1
Macromolecule | Name: Cryptophycin 1 / type: ligand / ID: 3 / Number of copies: 8 / Formula: YNP |
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Molecular weight | Theoretical: 655.178 Da |
Chemical component information | ![]() ChemComp-YNP: |
-Macromolecule #4: GUANOSINE-5'-DIPHOSPHATE
Macromolecule | Name: GUANOSINE-5'-DIPHOSPHATE / type: ligand / ID: 4 / Number of copies: 8 / Formula: GDP |
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Molecular weight | Theoretical: 443.201 Da |
Chemical component information | ![]() ChemComp-GDP: |
-Macromolecule #5: GUANOSINE-5'-TRIPHOSPHATE
Macromolecule | Name: GUANOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 5 / Number of copies: 8 / Formula: GTP |
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Molecular weight | Theoretical: 523.18 Da |
Chemical component information | ![]() ChemComp-GTP: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.5 mg/mL |
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Buffer | pH: 6.9 |
Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: CONTINUOUS |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 277.15 K / Instrument: LEICA EM GP |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 66.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal magnification: 130000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |