+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-7973 | ||||||||||||
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Title | Undecorated GMPCPP microtubule | ||||||||||||
Map data | Undecorated GMPCPP microtubule | ||||||||||||
Sample |
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Keywords | microtubule / cytoskeleton / GMPCPP / seam / CELL CYCLE | ||||||||||||
Function / homology | Function and homology information Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Hedgehog 'off' state / Cilium Assembly / Intraflagellar transport / COPI-dependent Golgi-to-ER retrograde traffic / Carboxyterminal post-translational modifications of tubulin / RHOH GTPase cycle / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / PKR-mediated signaling ...Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Hedgehog 'off' state / Cilium Assembly / Intraflagellar transport / COPI-dependent Golgi-to-ER retrograde traffic / Carboxyterminal post-translational modifications of tubulin / RHOH GTPase cycle / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / PKR-mediated signaling / Resolution of Sister Chromatid Cohesion / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / Separation of Sister Chromatids / The role of GTSE1 in G2/M progression after G2 checkpoint / Aggrephagy / Recruitment of NuMA to mitotic centrosomes / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / COPI-independent Golgi-to-ER retrograde traffic / MHC class II antigen presentation / COPI-mediated anterograde transport / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / structural constituent of cytoskeleton / microtubule cytoskeleton organization / microtubule cytoskeleton / mitotic cell cycle / microtubule / GTPase activity / GTP binding / metal ion binding / cytoplasm Similarity search - Function | ||||||||||||
Biological species | Sus scrofa (pig) | ||||||||||||
Method | helical reconstruction / cryo EM / Resolution: 3.1 Å | ||||||||||||
Authors | Zhang R / Nogales E | ||||||||||||
Funding support | United States, 3 items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2018 Title: Separating the effects of nucleotide and EB binding on microtubule structure. Authors: Rui Zhang / Benjamin LaFrance / Eva Nogales / Abstract: Microtubules (MTs) are polymers assembled from αβ-tubulin heterodimers that display the hallmark behavior of dynamic instability. MT dynamics are driven by GTP hydrolysis within the MT lattice, and ...Microtubules (MTs) are polymers assembled from αβ-tubulin heterodimers that display the hallmark behavior of dynamic instability. MT dynamics are driven by GTP hydrolysis within the MT lattice, and are highly regulated by a number of MT-associated proteins (MAPs). How MAPs affect MTs is still not fully understood, partly due to a lack of high-resolution structural data on undecorated MTs, which need to serve as a baseline for further comparisons. Here we report three structures of MTs in different nucleotide states (GMPCPP, GDP, and GTPγS) at near-atomic resolution and in the absence of any binding proteins. These structures allowed us to differentiate the effects of nucleotide state versus MAP binding on MT structure. Kinesin binding has a small effect on the extended, GMPCPP-bound lattice, but hardly affects the compacted GDP-MT lattice, while binding of end-binding (EB) proteins can induce lattice compaction (together with lattice twist) in MTs that were initially in an extended and more stable state. We propose a MT lattice-centric model in which the MT lattice serves as a platform that integrates internal tubulin signals, such as nucleotide state, with outside signals, such as binding of MAPs or mechanical forces, resulting in global lattice rearrangements that in turn affect the affinity of other MT partners and result in the exquisite regulation of MT dynamics. | ||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_7973.map.gz | 213.6 MB | EMDB map data format | |
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Header (meta data) | emd-7973-v30.xml emd-7973.xml | 16.5 KB 16.5 KB | Display Display | EMDB header |
Images | emd_7973.png | 342.7 KB | ||
Filedesc metadata | emd-7973.cif.gz | 6.3 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-7973 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-7973 | HTTPS FTP |
-Related structure data
Related structure data | 6dpuMC 7974C 7975C 7976C 7977C 6dpvC 6dpwC C: citing same article (ref.) M: atomic model generated by this map |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_7973.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Undecorated GMPCPP microtubule | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.096 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : microtubule stabilized by GMPCPP
Entire | Name: microtubule stabilized by GMPCPP |
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Components |
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-Supramolecule #1: microtubule stabilized by GMPCPP
Supramolecule | Name: microtubule stabilized by GMPCPP / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: Sus scrofa (pig) |
-Macromolecule #1: Tubulin alpha-1B chain
Macromolecule | Name: Tubulin alpha-1B chain / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: Sus scrofa (pig) |
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 #2: Tubulin beta chain
Macromolecule | Name: Tubulin beta chain / type: protein_or_peptide / ID: 2 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: Sus scrofa (pig) |
Molecular weight | Theoretical: 49.90777 KDa |
Sequence | String: MREIVHIQAG QCGNQIGAKF WEVISDEHGI DPTGSYHGDS DLQLERINVY YNEAAGNKYV PRAILVDLEP GTMDSVRSGP FGQIFRPDN FVFGQSGAGN NWAKGHYTEG AELVDSVLDV VRKESESCDC LQGFQLTHSL GGGTGSGMGT LLISKIREEY P DRIMNTFS ...String: MREIVHIQAG QCGNQIGAKF WEVISDEHGI DPTGSYHGDS DLQLERINVY YNEAAGNKYV PRAILVDLEP GTMDSVRSGP FGQIFRPDN FVFGQSGAGN NWAKGHYTEG AELVDSVLDV VRKESESCDC LQGFQLTHSL GGGTGSGMGT LLISKIREEY P DRIMNTFS VVPSPKVSDT VVEPYNATLS VHQLVENTDE TYCIDNEALY DICFRTLKLT TPTYGDLNHL VSATMSGVTT CL RFPGQLN ADLRKLAVNM VPFPRLHFFM PGFAPLTSRG SQQYRALTVP ELTQQMFDAK NMMAACDPRH GRYLTVAAVF RGR MSMKEV DEQMLNVQNK NSSYFVEWIP NNVKTAVCDI PPRGLKMSAT FIGNSTAIQE LFKRISEQFT AMFRRKAFLH WYTG EGMDE MEFTEAESNM NDLVSEYQQY QDATADEQGE FEEEGEEDEA UniProtKB: Tubulin beta chain |
-Macromolecule #3: GUANOSINE-5'-TRIPHOSPHATE
Macromolecule | Name: GUANOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 3 / Number of copies: 6 / Formula: GTP |
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Molecular weight | Theoretical: 523.18 Da |
Chemical component information | ChemComp-GTP: |
-Macromolecule #4: MAGNESIUM ION
Macromolecule | Name: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 12 / Formula: MG |
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Molecular weight | Theoretical: 24.305 Da |
-Macromolecule #5: PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER
Macromolecule | Name: PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER / type: ligand / ID: 5 / Number of copies: 6 / Formula: G2P |
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Molecular weight | Theoretical: 521.208 Da |
Chemical component information | ChemComp-G2P: |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | helical reconstruction |
Aggregation state | helical array |
-Sample preparation
Concentration | 3 mg/mL |
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Buffer | pH: 6.8 Details: BRB80 buffer (80 mM PIPES, pH 6.8, 1 mM EGTA, 1 mM MgCl2) supplemented with 1 mM GMPCPP, 1 mM DTT, and 0.05% Nonident P-40 |
Grid | Model: C-flat-1.2/1.3 4C / Material: COPPER / Mesh: 400 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 50 sec. / Pretreatment - Atmosphere: AIR Details: Glow discharge was performed with Pelco EasiGlow device. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 298 K / Instrument: FEI VITROBOT MARK IV / Details: Blot for 4 seconds before plunging.. |
Details | Microtubules were polymerized at 37 degrees for 30 minutes. |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Calibrated defocus max: 2.7 µm / Calibrated defocus min: 0.8 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 0.01 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 105000 |
Specialist optics | Spherical aberration corrector: Microscope has a Cs corrector. Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: COUNTING / Digitization - Dimensions - Width: 3838 pixel / Digitization - Dimensions - Height: 3710 pixel / Digitization - Frames/image: 1-40 / Number grids imaged: 1 / Number real images: 1176 / Average exposure time: 8.0 sec. / Average electron dose: 1.33 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: OTHER |
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Final angle assignment | Type: NOT APPLICABLE / Software - Name: FREALIGN |
Final reconstruction | Number classes used: 1 Applied symmetry - Helical parameters - Δz: 8.99 Å Applied symmetry - Helical parameters - Δ&Phi: -25.75 ° Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric) Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: FREALIGN / Number images used: 110127 |
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: RIGID BODY FIT / Overall B value: 150 / Target criteria: Correlation coefficient |
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Output model | PDB-6dpu: |