WordGarden.iotubulin
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Meanings
Noun
a globular protein that forms microtubules in cells
Beyond the definition
Imagine tiny building pieces inside your cells, always joining together and coming apart. These pieces are proteins called tubulin. They are the main material that makes microtubules, tiny tubes that help cells keep their shape, move materials around, and divide. You can think of them as part of the cell's inner support system. Without tubulin, cells could not keep their structure or carry out many basic jobs properly. It is also important in fast-dividing cells, which is why some cancer drugs target it.
Tubulin is not just one protein. It is a family of proteins that join together to form microtubules, which are major parts of the cytoskeleton in eukaryotic cells. These microtubules are not fixed in place. They grow and shrink as tubulin units are added or removed, and this constant change is important for many cell activities.
Think about how a cell moves supplies from one place to another along tiny internal tracks, or how some cells move using cilia or flagella. Tubulin-based structures make that possible. During cell division, microtubules also help separate chromosomes so that each new cell gets the right genetic material. Tubulin is also very important in nerve cells, where it helps support long extensions such as axons.
There are different kinds of tubulin, with alpha-tubulin and beta-tubulin being the best known. Together, they form the basic units of microtubules. Scientists study tubulin closely because problems with it can affect cell division, cell transport, and nerve cell function. Some chemotherapy drugs work by disrupting how tubulin forms or maintains microtubules, which can stop rapidly dividing cancer cells from growing.
So, while you may not hear about tubulin often, it is one of the key proteins that helps cells keep their shape, organize their inner structure, move materials, and divide correctly. It works quietly in the background, but it is essential to life at the cellular level.
Examples
- 1
Cell structure
In biology class, we learned that tubulin helps build the tiny tubes that support a cell from the inside.
- Domaintubulin
a cell protein that forms microtubules
- 2
Lab research
The researchers measured how quickly tubulin assembled when the sample was warmed.
- 3
Cancer treatment
Some cancer drugs work by preventing tubulin from forming normal microtubules.
See also
Similar
- microtubule protein
Shades of meaning
- microtubule subunit
Contrast
- actin
- keratin
Used with (collocations)
- alpha-tubulin
- beta-tubulin
- tubulin dimer
- tubulin polymerization
Explore
Forms and spellings
1 form open this card.
Main spelling
- tubulin