32.0k views
0 votes
What is the name of the protein that binds to calcium in smooth muscle?

1 Answer

3 votes

Answer:

Troponin

Step-by-step explanation:

Troponin and tropomyosin are the two regulatory proteins that are involved in switching the muscle contraction on and off. Troponin protein is a component of the thin filament. At the onset of contraction, the sarcoplasmic reticulum releases calcium ions (Ca2+) into the sarcoplasm. As calcium ions (Ca2+) bind to troponin, it changes shape. This conformational change serves to move the tropomyosin away from myosin-binding sites on actin molecules. Myosin binds to actin and the muscle contraction subsequently begins.

User Qrzysio
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.