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Yorodumi- PDB-5n5n: Cryo-EM structure of tsA201 cell alpha1B and betaI and betaIVb mi... -
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-Basic information
Entry | Database: PDB / ID: 5n5n | |||||||||
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Title | Cryo-EM structure of tsA201 cell alpha1B and betaI and betaIVb microtubules | |||||||||
Components |
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Keywords | STRUCTURAL PROTEIN / Microtubules Dynamics Tubulin Isoform | |||||||||
Function / homology | Function and homology information odontoblast differentiation / Post-chaperonin tubulin folding pathway / Carboxyterminal post-translational modifications of tubulin / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / cytoskeleton-dependent intracellular transport / Intraflagellar transport / Sealing of the nuclear envelope (NE) by ESCRT-III / Gap junction assembly / Formation of tubulin folding intermediates by CCT/TriC ...odontoblast differentiation / Post-chaperonin tubulin folding pathway / Carboxyterminal post-translational modifications of tubulin / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / cytoskeleton-dependent intracellular transport / Intraflagellar transport / Sealing of the nuclear envelope (NE) by ESCRT-III / Gap junction assembly / Formation of tubulin folding intermediates by CCT/TriC / COPI-independent Golgi-to-ER retrograde traffic / natural killer cell mediated cytotoxicity / Kinesins / Assembly and cell surface presentation of NMDA receptors / GTPase activating protein binding / COPI-dependent Golgi-to-ER retrograde traffic / regulation of synapse organization / intercellular bridge / nuclear envelope lumen / Recycling pathway of L1 / RHOH GTPase cycle / RHO GTPases activate IQGAPs / spindle assembly / MHC class I protein binding / Hedgehog 'off' state / cytoplasmic microtubule / microtubule-based process / COPI-mediated anterograde transport / Activation of AMPK downstream of NMDARs / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Recruitment of mitotic centrosome proteins and complexes / Resolution of Sister Chromatid Cohesion / Recruitment of NuMA to mitotic centrosomes / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / Anchoring of the basal body to the plasma membrane / MHC class II antigen presentation / cellular response to interleukin-4 / AURKA Activation by TPX2 / 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 / PKR-mediated signaling / structural constituent of cytoskeleton / cytoplasmic ribonucleoprotein granule / 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 / azurophil granule lumen / Regulation of PLK1 Activity at G2/M Transition / double-stranded RNA binding / mitotic cell cycle / cell body / microtubule / Potential therapeutics for SARS / cytoskeleton / membrane raft / cell division / protein domain specific binding / GTPase activity / ubiquitin protein ligase binding / Neutrophil degranulation / protein-containing complex binding / GTP binding / structural molecule activity / protein-containing complex / extracellular exosome / extracellular region / metal ion binding / nucleus / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.2 Å | |||||||||
Authors | Vemu, A. / Atherton, J. / Spector, J.O. / Moores, C.A. / Roll-Mecak, A. | |||||||||
Funding support | United Kingdom, United States, 2items
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Citation | Journal: Mol Biol Cell / Year: 2017 Title: Tubulin isoform composition tunes microtubule dynamics. Authors: Annapurna Vemu / Joseph Atherton / Jeffrey O Spector / Carolyn A Moores / Antonina Roll-Mecak / Abstract: Microtubules polymerize and depolymerize stochastically, a behavior essential for cell division, motility, and differentiation. While many studies advanced our understanding of how microtubule- ...Microtubules polymerize and depolymerize stochastically, a behavior essential for cell division, motility, and differentiation. While many studies advanced our understanding of how microtubule-associated proteins tune microtubule dynamics in trans, we have yet to understand how tubulin genetic diversity regulates microtubule functions. The majority of in vitro dynamics studies are performed with tubulin purified from brain tissue. This preparation is not representative of tubulin found in many cell types. Here we report the 4.2-Å cryo-electron microscopy (cryo-EM) structure and in vitro dynamics parameters of α1B/βI+βIVb microtubules assembled from tubulin purified from a human embryonic kidney cell line with isoform composition characteristic of fibroblasts and many immortalized cell lines. We find that these microtubules grow faster and transition to depolymerization less frequently compared with brain microtubules. Cryo-EM reveals that the dynamic ends of α1B/βI+βIVb microtubules are less tapered and that these tubulin heterodimers display lower curvatures. Interestingly, analysis of EB1 distributions at dynamic ends suggests no differences in GTP cap sizes. Last, we show that the addition of recombinant α1A/βIII tubulin, a neuronal isotype overexpressed in many tumors, proportionally tunes the dynamics of α1B/βI+βIVb microtubules. Our study is an important step toward understanding how tubulin isoform composition tunes microtubule dynamics. | |||||||||
History |
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-Structure visualization
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Structure viewer | Molecule: MolmilJmol/JSmol |
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PDBx/mmCIF format | 5n5n.cif.gz | 966.1 KB | Display | PDBx/mmCIF format |
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PDB format | pdb5n5n.ent.gz | 799.9 KB | Display | PDB format |
PDBx/mmJSON format | 5n5n.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/n5/5n5n ftp://data.pdbj.org/pub/pdb/validation_reports/n5/5n5n | HTTPS FTP |
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-Related structure data
Related structure data | 3589MC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
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Deposited unit |
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Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments: Component-ID: 0 / Beg auth comp-ID: MET / Beg label comp-ID: MET / Refine code: 0
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