Final answer:
Phosphorylation of proteins can interfere with interactions between the target and its partner, create a binding site for an interacting partner protein, and induce a conformational change in the modified protein, altering its interactions with partner proteins.
Step-by-step explanation:
Phosphorylation of proteins can alter gene expression in many ways. It can interfere with the interactions between the target protein and its partner, creating a binding site for the partner protein. Additionally, phosphorylation can induce a conformational change in the modified protein, altering its interactions with partner proteins.