What are the differences between the N-terminus and C-terminus of a protein in terms of their functions and structural significance?

Answer 1

The N-terminus and C-terminus of a protein are the two ends of the protein chain. The N-terminus is where the protein chain starts, while the C-terminus is where it ends.

In terms of functions, the N-terminus often plays a role in targeting the protein to its correct location within the cell, as well as in regulating protein stability and interactions with other molecules. The C-terminus, on the other hand, is important for protein folding and stability, as well as for signaling and protein-protein interactions.

Structurally, the N-terminus and C-terminus can have different chemical properties, which can affect how the protein interacts with other molecules and performs its function. Additionally, modifications such as phosphorylation or acetylation can occur at these termini, further influencing the protein's structure and function.