Tubulin Preparation
Tubulin Preparation - Related Videos
02:40
Second Harmonic Generation Imaging in a Rat Model to Study Tubulin Defects
0 Views •
2025
Source: Piazza, V., et al., Label-Free Non-Linear Optics for the Study of Tubulin-Dependent Defects in Central Myelin. J. Vis. Exp. (2023)This video demonstrates the procedure for imaging microtubule abnormalities in a rat brain tissue slice using a two-photon excitation microscope. It employs second harmonic generation (SHG) signals to detect tubulin defects and reduced myelin production.
06:30
Optimizing Tubulin Yield from Porcine Brain Tissue
0 Views •
2024
This protocol describes a technique for the high-yield isolation of tubulin from the porcine brain optimized for small-scale instrumentation. The isolation procedures are complemented by procedures for determining tubulin polymerization activity in vitro using co-sedimentation assays and transmission electron microscopy.
08:07
Label-Free Non-Linear Optics for the Study of Tubulin-Dependent Defects in Central Myelin
0 Views •
2023
In this article, we present a protocol to detect microtubule-loaded oligodendrocytes in a model of tubulinopathy through a simple, innovative second harmonic generation microscopy approach.
07:54
Purification of Tubulin with Controlled Posttranslational Modifications and Isotypes from Limited Sources by Polymerization-Depolymerization Cycles
0 Views •
Cited by 6 •
2020
This protocol describes tubulin purification from small/medium-scale sources such as cultured cells or single mouse brains, using polymerization and depolymerization cycles. The purified tubulin is enriched in specific isotypes or has specific posttranslational modifications and can be used in in vitro reconstitution assays to study microtubule dynamics and interactions.
07:21
Quantitative Microtubule Fractionation Technique to Separate Stable Microtubules, Labile Microtubules, and Free Tubulin in Mouse Tissues
0 Views •
2023
Microtubules, which are tubulin polymers, play a crucial role as a cytoskeleton component in eukaryotic cells and are known for their dynamic instability. This study developed a method for fractionating microtubules to separate them into stable microtubules, labile microtubules, and free tubulin to evaluate the stability of microtubules in various mouse tissues.
FAQs
The enrichment principle exploits tubulin’s ability to alternate between soluble and polymerized states. Under conditions that support assembly, tubulin forms microtubules; altered conditions then promote disassembly, returning tubulin to a form that can be separated and used for another cycle. Repeating these transitions helps enrich the preparation while preserving the material needed for biochemical assays.
GTP availability helps control whether tubulin can participate effectively in microtubule assembly. When suitable GTP conditions support polymerization, tubulin enters the assembled microtubule fraction; changes in GTP availability favor disassembly and recovery of soluble tubulin. This relationship makes nucleotide conditions important both for purification and for later measurements of polymerization behavior.
Temperature and ionic conditions shift the balance between tubulin assembly and disassembly. Conditions that favor microtubule formation support collection of polymerized material, whereas changes that destabilize the polymers assist recovery of soluble tubulin during preparation. Controlling these variables is therefore essential for obtaining material whose assembly properties remain suitable for biochemical comparison.
Purity alone does not establish that a tubulin preparation will behave appropriately in an assay. Functional activity determines whether the sample produces interpretable polymerization kinetics and supports reactions with motor proteins or microtubule-targeting compounds. Assessing both properties reduces ambiguity when comparing samples affected by mutations, post-translational modifications, or experimental treatments.
A typical workflow uses controlled assembly, disassembly, and separation stages rather than relying on a single isolation step. Tubulin is first exposed to conditions that promote microtubule formation, then conditions that promote disassembly, with separation steps used to enrich the desired material. Repeated cycles improve consistency and provide preparation suitable for downstream biochemical experiments.
Prepared tubulin supports several complementary studies of microtubule behavior. Researchers can measure polymerization dynamics, examine motor-protein activity, test interactions with microtubule-targeting compounds, and investigate cytoskeletal organization. Because these applications depend on assembly-competent material, preparation quality directly affects whether observed differences reflect the experimental variable rather than inconsistent tubulin performance.
Consistent preparation provides a common biochemical foundation for comparing tubulin variants or modified forms. Researchers can examine whether these changes alter polymerization kinetics, interactions with motor proteins, responses to microtubule-targeting compounds, or aspects of cytoskeletal organization. Reliable purity and activity are especially important because they allow differences between samples to be interpreted as biological effects.