Question

What is the term for the protein that organizes groups of interacting intracellular signaling proteins into signaling complexes?

1) Kinase cascade
2) Scaffold protein
3) Interaction domain
4) Intracellular receptor

Answer 1

Option 2.

A scaffold protein organizes groups of interacting intracellular signaling proteins into signaling complexes, which are crucial for efficient signal transduction within the cell.

Step-by-step explanation:

The protein that organizes groups of interacting intracellular signaling proteins into signaling complexes is known as a scaffold protein.

In the context of signal transduction, scaffold proteins play a critical role by bringing together various components of a signaling pathway to ensure efficient communication within the cell.

These proteins enable specific and timely cellular responses by assembling the necessary signaling molecules in proximity to one another.

Scaffold proteins are different from kinases, which are enzymes that catalyze the phosphorylation of other proteins, altering their shape and function, thereby activating or inactivating them.

Unlike interaction domains or intracellular receptors, scaffold proteins do not directly relay the signal but instead provide a structural framework that supports the signaling cascade.

Therefore, the correct option is: 2) Scaffold protein.