The cytoskeleton (article) | Khan Academy

Tags

Top Highlights

• In eukaryotes, there are three types of protein fibers in the cytoskeleton: microfilaments, intermediate filaments, and microtubules.

• crawling of a white blood cell

• individual myosin motors, which "walk" along actin filament bundles

• For instance, they provide tracks for motor proteins called kinesins and dyneins

• grow and shrink quickly

• they have two ends that are structurally different from one another

• form a hollow, straw-like tube

• α-tubulin and β-tubulin

• intermediate filaments are more permanent

• essentially structural role

• anchoring the nucleus and other organelles

• serve as tracks for the movement of a motor protein called myosin

• made of actin monomers

• motor proteins called dyneins

• causes the flagellum or cilium to beat

• basal body

• plays a key role in assembly of the cilium or flagellum

• regulates which proteins can enter or exit

• centrosomes, structures that act as microtubule organizing centers in animal cells

• Actin filaments can assemble and disassemble quickly