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- PDB-6wvm: High curvature lateral interaction within a 13-protofilament, Tax... -

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Basic information

Entry
Database: PDB / ID: 6wvm
TitleHigh curvature lateral interaction within a 13-protofilament, Taxol stabilized microtubule
Components
  • Tubulin alpha-1B chain
  • Tubulin beta chain
KeywordsSTRUCTURAL PROTEIN / Microtubule
Function / homology
Function and homology information


Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Intraflagellar transport / Carboxyterminal post-translational modifications of tubulin / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / Resolution of Sister Chromatid Cohesion / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / COPI-dependent Golgi-to-ER retrograde traffic ...Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Intraflagellar transport / Carboxyterminal post-translational modifications of tubulin / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / Resolution of Sister Chromatid Cohesion / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / COPI-dependent Golgi-to-ER retrograde traffic / COPI-independent Golgi-to-ER retrograde traffic / COPI-mediated anterograde transport / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / MHC class II antigen presentation / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / Aggrephagy / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / Recruitment of NuMA to mitotic centrosomes / Hedgehog 'off' state / positive regulation of axon guidance / intercellular bridge / microtubule-based process / cerebral cortex development / mitotic spindle / structural constituent of cytoskeleton / microtubule cytoskeleton organization / microtubule cytoskeleton / mitotic cell cycle / nervous system development / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / microtubule / protein heterodimerization activity / GTPase activity / GTP binding / metal ion binding / cytosol / cytoplasm
Similarity search - Function
Helix hairpin bin / Tubulin/FtsZ, C-terminal domain / Tubulin/FtsZ, GTPase domain / 60s Ribosomal Protein L30; Chain: A; / Alpha tubulin / Tubulin-beta mRNA autoregulation signal. / Beta tubulin, autoregulation binding site / Beta tubulin / Tubulin / Tubulin, C-terminal ...Helix hairpin bin / Tubulin/FtsZ, C-terminal domain / Tubulin/FtsZ, GTPase domain / 60s Ribosomal Protein L30; Chain: A; / Alpha tubulin / Tubulin-beta mRNA autoregulation signal. / Beta tubulin, autoregulation binding site / Beta tubulin / Tubulin / Tubulin, C-terminal / Tubulin C-terminal domain / Tubulin, conserved site / Tubulin subunits alpha, beta, and gamma signature. / Tubulin/FtsZ family, C-terminal domain / Tubulin/FtsZ-like, C-terminal domain / Tubulin/FtsZ, C-terminal / Tubulin/FtsZ, 2-layer sandwich domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ, GTPase domain / Tubulin/FtsZ, GTPase domain superfamily / Helix Hairpins / Rossmann fold / 2-Layer Sandwich / Orthogonal Bundle / 3-Layer(aba) Sandwich / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
GUANOSINE-5'-DIPHOSPHATE / GUANOSINE-5'-TRIPHOSPHATE / TAXOL / Tubulin beta chain / Tubulin alpha-1B chain / Tubulin beta-2B chain
Similarity search - Component
Biological speciesBos taurus (cattle)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsDebs, G.E. / Cha, M. / Huehn, A.R. / Sindelar, C.V.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2020
Title: Dynamic and asymmetric fluctuations in the microtubule wall captured by high-resolution cryoelectron microscopy.
Authors: Garrett E Debs / Michael Cha / Xueqi Liu / Andrew R Huehn / Charles V Sindelar /
Abstract: Microtubules are tubular polymers with essential roles in numerous cellular activities. Structures of microtubules have been captured at increasing resolution by cryo-EM. However, dynamic properties ...Microtubules are tubular polymers with essential roles in numerous cellular activities. Structures of microtubules have been captured at increasing resolution by cryo-EM. However, dynamic properties of the microtubule are key to its function, and this behavior has proved difficult to characterize at a structural level due to limitations in existing structure determination methods. We developed a high-resolution cryo-EM refinement method that divides an imaged microtubule into its constituent protofilaments, enabling deviations from helicity and other sources of heterogeneity to be quantified and corrected for at the single-subunit level. We demonstrate that this method improves the resolution of microtubule 3D reconstructions and substantially reduces anisotropic blurring artifacts, compared with methods that utilize helical symmetry averaging. Moreover, we identified an unexpected, discrete behavior of the m-loop, which mediates lateral interactions between neighboring protofilaments and acts as a flexible hinge between them. The hinge angle adopts preferred values corresponding to distinct conformations of the m-loop that are incompatible with helical symmetry. These hinge angles fluctuate in a stochastic manner, and perfectly cylindrical microtubule conformations are thus energetically and entropically penalized. The hinge angle can diverge further from helical symmetry at the microtubule seam, generating a subpopulation of highly distorted microtubules. However, the seam-distorted subpopulation disappears in the presence of Taxol, a microtubule stabilizing agent. These observations provide clues into the structural origins of microtubule flexibility and dynamics and highlight the role of structural polymorphism in defining microtubule behavior.
History
DepositionMay 6, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 20, 2020Provider: repository / Type: Initial release
Revision 1.1Jul 8, 2020Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.year / _citation_author.identifier_ORCID
Revision 1.2Jul 22, 2020Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID
Revision 1.3Aug 5, 2020Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 1.4Mar 6, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Assembly

Deposited unit
C: Tubulin alpha-1B chain
D: Tubulin beta chain
A: Tubulin alpha-1B chain
B: Tubulin beta chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)204,00612
Polymers200,3164
Non-polymers3,6898
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 2 types, 4 molecules CADB

#1: Protein Tubulin alpha-1B chain / Alpha-tubulin ubiquitous / Tubulin K-alpha-1 / Tubulin alpha-ubiquitous chain


Mass: 50204.445 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P81947
#2: Protein Tubulin beta chain


Mass: 49953.797 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: E1BJB1, UniProt: Q6B856*PLUS

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Non-polymers , 4 types, 8 molecules

#3: Chemical ChemComp-GTP / GUANOSINE-5'-TRIPHOSPHATE


Mass: 523.180 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N5O14P3 / Comment: GTP, energy-carrying molecule*YM
#4: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg
#5: Chemical ChemComp-GDP / GUANOSINE-5'-DIPHOSPHATE


Type: RNA linking / Mass: 443.201 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H15N5O11P2 / Comment: GDP, energy-carrying molecule*YM
#6: Chemical ChemComp-TA1 / TAXOL


Mass: 853.906 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C47H51NO14 / Comment: medication, chemotherapy*YM

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Details

Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: FILAMENT / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Microtubules stabilized with Taxol in the presence of a low concentration of Kinesin Dimer and ADP
Type: ORGANELLE OR CELLULAR COMPONENT / Entity ID: #1-#2 / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Bos taurus (cattle)
Buffer solutionpH: 6.8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 66 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)
Image scansMovie frames/image: 40 / Used frames/image: 2-15

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Processing

EM software
IDNameCategory
4GctfCTF correction
10RELIONinitial Euler assignment
11RELIONfinal Euler assignment
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 164553 / Symmetry type: POINT

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