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Microtubule and mitosis dynamics
Research Guide
What is Microtubule and mitosis dynamics?
Microtubule and mitosis dynamics refers to the GTPase-dependent polymerization, depolymerization, and force-generating behaviors of microtubule polymers composed of αβ-tubulin heterodimers that drive mitotic spindle assembly, kinetochore capture, chromosome congression, and segregation during cell division.
The field encompasses over 106,218 works studying how microtubules organize intracellular space and ensure faithful chromosome segregation through dynamic instability. Single-molecule measurements reveal intermediate states in microtubule dynamics influenced by nucleotide states, as described in the recent preprint "Single-molecule microtubule dynamics measurements reveal an intermediate state and clarify the role of nucleotide" (2025). Force-transducing ensembles at growing microtubule tips regulate mitotic spindle size, according to "Force-transducing molecular ensembles at growing microtubule tips control mitotic spindle size" (2025).
Research Sub-Topics
Microtubule Dynamic Instability
This sub-topic investigates stochastic switching between microtubule growth and shrinkage phases. Researchers quantify catastrophe and rescue frequencies using live-cell imaging.
Mitotic Spindle Assembly and Bipolarity
This sub-topic studies microtubule organization into bipolar spindles during mitosis. Researchers examine motor proteins and microtubule crosslinking for spindle integrity.
Kinetochore-Microtubule Attachments
This sub-topic analyzes error correction and stabilization of kinetochore-microtubule interfaces. Researchers model tension-dependent attachment maturation via Aurora B kinase.
Cyclin-Dependent Kinase Regulation of Mitosis
This sub-topic elucidates CDK1-cyclin B control of mitotic entry, progression, and exit. Researchers study substrate phosphorylation dynamics using mass spectrometry.
Rho GTPases in Cytokinesis
This sub-topic examines RhoA signaling for contractile ring formation and furrow ingression. Researchers investigate microtubule-dependent Rho activation zones.
Why It Matters
Microtubule and mitosis dynamics directly impact accurate chromosome segregation, with errors contributing to aneuploidy in cancer. The preprint "Kinetochore-centrosome feedback linking CENP-E and Aurora kinases controls chromosome congression" (2025) shows how CENP-E opposes Aurora kinases to promote end-on kinetochore-microtubule attachments, as confirmed in news coverage "Study forces a textbook rewrite on cell division" citing Vukušić and Tolić (2025). "Force-transducing molecular ensembles at growing microtubule tips control mitotic spindle size" (2025) demonstrates that specific molecular motors at microtubule tips generate unique forces distinct from other spindle motors, establishing bipolar spindle organization essential for cell division. These mechanisms inform targeted cancer therapies disrupting spindle dynamics, such as microtubule-stabilizing drugs like taxanes used in over 50% of breast cancer chemotherapies.
Reading Guide
Where to Start
"Biophysics of mitosis" (2025) provides an accessible review of microtubule-based mitotic mechanisms from a biophysical perspective, ideal for building foundational understanding before tackling mechanism-specific preprints.
Key Papers Explained
The preprint "Single-molecule microtubule dynamics measurements reveal an intermediate state and clarify the role of nucleotide" (2025) establishes tubulin-level mechanisms that "Force-transducing molecular ensembles at growing microtubule tips control mitotic spindle size" (2025) builds upon for tip-force generation controlling spindle scaling. "Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules" (2025) extends this to kinetochore capture dynamics, while "Kinetochore-centrosome feedback linking CENP-E and Aurora kinases controls chromosome congression" (2025) integrates CENP-E/Aurora feedback downstream for alignment, as experimentally validated by Vukušić & Tolić (2025).
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Recent preprints emphasize single-molecule resolution of nucleotide intermediates and force ensembles at tips, with "Data-driven equation-free dynamics applied to many-protein complexes: The microtubule tip relaxation" (Wu et al., 2025) modeling tip relaxation in Biophysical Journal. Vukušić & Tolić (2025) in Nature Communications rewrites congression models via CENP-E/Aurora opposition. Simulations via AsterInvasion and MTSim actively probe branching networks and centrosome movements.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | VMD: Visual molecular dynamics | 1996 | Journal of Molecular G... | 63.3K | ✕ |
| 2 | The Amber biomolecular simulation programs | 2005 | Journal of Computation... | 9.4K | ✓ |
| 3 | Surfing the p53 network | 2000 | Nature | 6.6K | ✕ |
| 4 | The Clonal Evolution of Tumor Cell Populations | 1976 | Science | 6.4K | ✕ |
| 5 | CDK inhibitors: positive and negative regulators of G1-phase p... | 1999 | Genes & Development | 6.1K | ✓ |
| 6 | Computer Visualization of Three-Dimensional Image Data Using IMOD | 1996 | Journal of Structural ... | 5.9K | ✕ |
| 7 | The catalog of human cytokeratins: Patterns of expression in n... | 1982 | Cell | 5.3K | ✕ |
| 8 | The Protein Kinase Family: Conserved Features and Deduced Phyl... | 1988 | Science | 5.1K | ✕ |
| 9 | Rho GTPases in cell biology | 2002 | Nature | 4.7K | ✕ |
| 10 | In Vivo Activation of the p53 Pathway by Small-Molecule Antago... | 2004 | Science | 4.6K | ✕ |
In the News
Microtubule Mysteries Revealed
_The study, “Data-driven equation-free dynamics applied to many-protein complexes: The microtubule tip relaxation,” was published January 2025 in the Biophysical Journal. The study authors are Jian...
New research reveals key mechanisms behind cell division
### Funding
Study forces a textbook rewrite on cell division
- Vukušić, K., & Tolić, I. M. (2025). CENP-E initiates chromosome congression by opposing Aurora kinases to promote end-on attachments. _Nature Communications_. doi.org/10.1038/s41467-025-64148-w
Dissecting Microtubule Dynamics in Mitosis by Reconstituting Spindle Submodules
Investigation of the fine dynamics of microtubules (MTs) within the mitotic spindle has been precluded in living cells due to the density and complexity of MT networks. We therefore thought to reco...
Force-transducing molecular ensembles at growing microtubule tips control mitotic spindle size
microtubules providing unique contribution to the force balance distinct from all other motors that act in the mitotic spindle. Our results reveal that microtubules are essential force generators f...
Code & Tools
**AsterInvasion**is a Python package for simulating the interaction and invasion of branching microtubule networks in 2D and 3D developed for the p...
This program simulates centrosome movement based on a mechanical model for two phenomena, centrosome centralization and spindle elongation, observe...
## Repository files navigation # Anamic Binder Build Status Simulate, fit and analyze microtubules. drawing ## Dependencies
This program builds a 3D structure of micritubule (MT) and does the molecular dynamics or monte-carlo (MD/MC) simulation.
`tutoscript/tutoScriptDualChannels.m` ``` This script demonstrates detection, tracking and building dynROI accross multiple channels. The example d...
Recent Preprints
Single-molecule microtubule dynamics measurements reveal an intermediate state and clarify the role of nucleotide
Microtubules are polymers of αβ-tubulin heterodimers that undergo GTPase dependent polymerization dynamics to organize the intracellular space and mediate faithful chromosome segregation. Microtubu...
Force-transducing molecular ensembles at growing microtubule tips control mitotic spindle size
Correct mitotic spindle size is required for accurate chromosome segregation during cell division. It is controlled by mechanical forces generated by molecular motors and non-motor proteins acting ...
Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules
The initial kinetochore (KT) encounter with a spindle microtubule (MT; KT capture) is one of the rate-limiting steps in establishing proper KT-MT interaction during mitosis. KT capture is facilitat...
Biophysics of mitosis
Mitosis is the process by which eukaryotic cells organize and segregate their chromosomes in preparation for cell division. It is accomplished by a cellular machine composed largely of microtubules...
Kinetochore-centrosome feedback linking CENP-E and Aurora kinases controls chromosome congression
Centrosomes are non-membranous organelles involved in various cellular processes, including cell division and ciliogenesis 18 . The majority of somatic cells in vertebrates contain two centrosomes,...
Latest Developments
Recent research as of February 2026 highlights significant advances in microtubule and mitosis dynamics, including the discovery that the protein CENP-E stabilizes chromosome attachments rather than acting as a motor, overturning two decades of understanding (phys.org), and the identification that only kinesin-5 and dynein are necessary for bipolar spindle formation during cell division (ellipse.prbb.org). Additionally, studies have elucidated how motor proteins drive microtubule self-organization into bipolar spindles (slcu.cam.ac.uk), and new insights into microtubule regulation by proteins like HURP and Kif18A have been published (nature.com, nature.com). Furthermore, research into microtubule dynamics at the molecular level, such as the role of tau in tubulin exchange, continues to advance understanding of microtubule behavior (nature.com).
Sources
Frequently Asked Questions
What drives microtubule dynamics in mitosis?
Microtubule dynamics arise from GTPase-dependent polymerization of αβ-tubulin heterodimers at polymer ends, enabling growth, shrinkage, and force generation for spindle assembly. The preprint "Single-molecule microtubule dynamics measurements reveal an intermediate state and clarify the role of nucleotide" (2025) identifies an intermediate state modulated by nucleotide interactions. These properties organize intracellular space and facilitate chromosome segregation.
How do kinetochores initially encounter spindle microtubules?
Initial kinetochore capture is facilitated by microtubule extension, kinetochore diffusion, microtubule pivoting, and kinetochore-generated short microtubules. "Molecular mechanisms facilitating the initial kinetochore encounter with spindle microtubules" (2025) details these factors as rate-limiting steps for proper kinetochore-microtubule interactions. This ensures timely bipolar attachment during prometaphase.
What controls mitotic spindle size?
Force-transducing molecular ensembles at growing microtubule tips generate mechanical forces balancing those from motors to set spindle size. The preprint "Force-transducing molecular ensembles at growing microtubule tips control mitotic spindle size" (2025) shows these ensembles provide unique contributions distinct from other spindle motors. Accurate size is required for chromosome segregation fidelity.
What role does CENP-E play in chromosome congression?
CENP-E initiates congression by opposing Aurora kinases to promote end-on kinetochore attachments via kinetochore-centrosome feedback. "Kinetochore-centrosome feedback linking CENP-E and Aurora kinases controls chromosome congression" (2025) and Vukušić & Tolić (2025) in Nature Communications demonstrate this mechanism. It aligns chromosomes at the metaphase plate.
How are microtubule dynamics studied in vitro?
Reconstitution of spindle submodules allows dissection of microtubule dynamics in controlled settings, bypassing cellular complexity. "Dissecting Microtubule Dynamics in Mitosis by Reconstituting Spindle Submodules" (2025) investigates fine dynamics within minimal mitotic modules. Tools like MTSim and Anamic simulate and analyze these processes.
Open Research Questions
- ? What molecular ensembles at microtubule tips transduce forces to precisely control mitotic spindle bipolarity and size?
- ? How does the nucleotide-modulated intermediate state in tubulin subunits quantitatively determine dynamic instability rates during mitosis?
- ? What feedback mechanisms between kinetochores, centrosomes, CENP-E, and Aurora kinases ensure error-free chromosome congression?
- ? How do short microtubules generated by kinetochores quantitatively contribute to initial spindle capture efficiency?
- ? What biophysical parameters govern microtubule pivoting and extension for optimal kinetochore encounters?
Recent Trends
Preprints from 2025 reveal nucleotide intermediates in dynamics ("Single-molecule microtubule dynamics measurements reveal an intermediate state and clarify the role of nucleotide"), force ensembles controlling spindle size ("Force-transducing molecular ensembles at growing microtubule tips control mitotic spindle size"), and CENP-E/Aurora feedback (Vukušić & Tolić, Nature Communications).
News highlights textbook-rewriting congression mechanisms and data-driven tip relaxation models by Wu et al. (Biophysical Journal, January 2025).
Simulation tools like AsterInvasion for branching microtubules and Anamic for analysis reflect computational advances.
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