How are actin filament and microtubule assembly similar?

Expert Solution

Microfilaments or actin filaments and microtubules are key components of the cytoskeleton of an eukaryotic cell. Together they help provide a a shape to the cell and help in movement of cells as well of organelles.

Microtubules are composed of two globular proteins called alpha and beta tubulin. Both tubulin molecules are bead like proteins that polymerise in a linear fashion to form a row of tubulin dimers called protofilament. Many protofilaments associate laterally to form a helical microtubule.

Microfilaments are composed of several globular actin subunits. Several actin subunits assemble into long actin polymers. Two such actin filaments form a double helix like structure that is known as microfilaments.

During polymerization of actin as well as alpha and beta tubulin ATP is required. ?

As you can see ATP is an essential requirement for assembly of both microfilaments and micro tubules and assembly of both invovles polymerization of subunits into filaments that further assemble to form the fibers.

gladiator answered 1 year ago

5. Discuss how myosin II walks along an actin filament. Be sure to include the details...

5. Discuss how myosin II walks along an actin filament. Be sure to include the details of the following steps: a) Attached b) Released c) Cocked d) Force-generating e) Attached

If a cell needs to make a thin actin filament thicker it will use what? Select...

If a cell needs to make a thin actin filament thicker it will use what? Select one: - Capping protein - Tubulin - Bundling protein - Cohesion protein - Crosslinking protein

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Intermediate filament assembly and disassembly in the cell is hypothesized to be regulated by phosphorylation. There are a number of different types of Keratin intermediate filaments in a cell. Researchers were specifically studying formation of intermediate filaments (IFs) from mixtures of “K5” and “K14” protofilaments. a. The introduction above makes sense when you think about how intermediate filaments are formed in the cell. Explain why an intermediate filament would be composed of both K5 and K14 protofilaments using the terms...

The myosin cross-bridge cycle________. requires ATP hydrolysis involves interaction of myosin heads and the actin filament...

The myosin cross-bridge cycle________. requires ATP hydrolysis involves interaction of myosin heads and the actin filament cannot occur if Ca++ is present a and b all of the above

what is an exception and how is it similar to a subroutine call? assembly 68000

Explain the process of microtubule assembly and disassembly. What role does dynamic instability play in the...

Explain the process of microtubule assembly and disassembly. What role does dynamic instability play in the cell?

What is a microtubule?

Explain how actin capping and actin severing could increase cell migration. Rubric (4): cell migration is...

Explain how actin capping and actin severing could increase cell migration. Rubric (4): cell migration is linked to actin capping (2) and severing of microfilaments (2).

Two lamps, one with a thick filament and the other with a thin filament, are connected...

Two lamps, one with a thick filament and the other with a thin filament, are connected in series. If the filaments are made of the same material, which lamp has the greater current running through it? A.The thick filament. b.The thin filament. c.They have the same current. In the previous question, if the filaments are made of the same material and are the same length, which has the greatest potential difference across it? a.The thick filament. b.The thin filament. c.They...

Give an example of microtubule and a mircofilament in the human body.

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