Severing enzymes amplify microtubule arrays through lattice GTP-tubulin incorporation
Open accessAbstract
Severing to build microtubules: Microtubules are essential intracellular polymers, built from tubulin subunits, that establish cell shape, move organelles, and segregate chromosomes during cell division. Vemu et al. show that microtubule-severing enzymes extract tubulin subunits along the microtubule shaft. This nanoscale damage is repaired by the incorporation of free tubulin, which stabilizes the microtubule against depolymerization. When extraction outpaces repair, microtubules are severed, emerging with stabilized ends composed of fresh tubulin. The severed microtubules act as templates for new microtubule growth, leading to amplification of microtubule number and mass. Thus, seemingly paradoxically, severing enzymes can increase microtubule mass in processes such as neurogenesis and mitotic spindle assembly. Science , this issue p. eaau1504
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Such regional variation is consistent with previous studies and suggests that lattice conformation can be locally influenced by lattice-binding microtubule-associated proteins, post-translational modifications, mechanical stress, or repair processes.
“Such regional variation is consistent with previous studies58and suggest that lattice conformation can be locally influenced by lattice-binding microtuble-associated proteins (MAPs)59–61, post-translational modifications, mechanical stress50,51, or repair processes62–66.”
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- Authors
- Vemu, A., Szczesna, E., Zehr, E. A., Spector, J. O., Grigorieff, N., Deaconescu, A. M., & Roll-Mecak, A.
- Affiliations
- National Institutes of Health (US)
- Cell Biology and Biophysics Unit, Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, Bethesda, MD 20892, USA.
- Howard Hughes Medical Institute (US)
- Brown University (US)
- Corresponding author
- Vemu, Annapurna
- ORCID
- Venue
- Science
- Published
- 2018-08-24
- Volume
- 361
- Issue
- 6404
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- PMC
- PMC6510489
- OpenAlex
- W2888209032
- Cited by
- 210
- References
- 1
- Citations by year
- 2026: 16 · 2025: 19 · 2024: 20 · 2023: 26 · 2022: 33 · 2021: 26 · 2020: 33 · 2019: 30 · 2018: 7
- FWCI
- 13.27
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health
- Howard Hughes Medical Institute
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
- Health Sciences › Medicine › Oncology › Cancer Treatment and Pharmacology
- Keywords
- microtubule severing, spastin, katanin, microtubule rescue, microtubule dynamics, microtubule stability, microtubule plus ends
- MeSH terms
- Single Molecule Imaging, Spastin, Katanin, Animals, Drosophila melanogaster, Guanosine Triphosphate, Humans, Microscopy, Electron, Microscopy, Fluorescence, Microtubules, Tubulin, Caenorhabditis elegans
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