Tubulin Protein
Structural protein
Tubulin protein is a protein that is fundamental to the structure and function of eukaryotic cells. The tubulin protein forms long polymers called microtubules, which are essential for many cellular processes, including cell division, cell movement, and maintaining the cell’s shape.
Tubulin is a heterodimer protein composed of two subunits, α-tubulin and β-tubulin, each with a molecular weight of around 50 kDa. The α- and β-tubulin subunits are assembled in a head-to-tail fashion, forming a tubulin dimer. These dimers then stack together end-to-end to form long, hollow tubes, or microtubules.
Microtubules are extremely important to the cell, as they help guide the movement of organelles and vesicles, and help to separate the chromosomes during cell division. Microtubules also provide structural support to the cell, and they are involved in the formation of cilia and flagella, which are structures on the surface of cells that move in a coordinated fashion to propel the cell.
The assembly and disassembly of microtubules is regulated by many different proteins, including motor proteins, MAPs (microtubule-associated proteins) and kinesins. These proteins help to control the length and stability of microtubules, and they also contribute to the movement of structures along the microtubule.
In summary, tubulin protein is crucial for the formation and function of microtubules, which are essential for many cellular processes in eukaryotic cells.
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