Question

Which of the following statements does NOT correctly match an actin-binding protein with its function? A....

Which of the following statements does NOT correctly match an actin-binding protein with its function?

A. Cofilin binds to F-actin

B. Profilin acts as a GTPase-activating protein (GAP) for G-actin

C. The Arp2/3 protein complex nucleates the assembly of branched actin

D. CapZ binds to the ends of actin filaments, preventing subunit addition or loss

I have a feeling it's C as actin isn't branched. Or is it?

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Answer #1

The answer is option B. Profilin is an actin-binding protein involved in the dynamic turnover and restructuring of the actin cytoskeleton. rofilin is important for spatially and temporally controlled growth of actinmicrofilaments, which is an essential process in cellular locomotion and cell shape changes. This restructuring of the actin cytoskeleton is essential for processes such as organ development, wound healing, and the hunting down of infectious intruders by cells of the immune system.

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