Final answer:
A major microtubule-binding protein is dynein and kinesin. These motor proteins are responsible for transport of cellular components along microtubule tracks within the cell.
Step-by-step explanation:
Major Microtubule-Binding Proteins
Microtubules are key parts of the cell's cytoskeleton, with functions that include maintaining cell shape, enabling cell motility, and facilitating the division of cells. They are composed of polymerized dimers of α-tubulin and β-tubulin, and are important elements for intracellular structure and transport. Motor proteins, namely dynein and kinesin, are major microtubule-binding proteins that utilize ATP to transport cellular cargo along microtubule tracks within the cell. These motor proteins can move organelles, vesicles, and other important components to specific locations, which is crucial for cellular function and organization.
Microfilaments, on the other hand, are made up of monomeric actin and are involved in maintaining the cell's shape and in motility, particularly in muscle contractions through interaction with myosin, another motor protein. Intermediate filaments, such as keratin, provide structural support and stabilize cellular structures.