what does a kinase do to a protein?????

Answer 1

Kinase phosphorylates a protein. It takes a phosphate group from ATP and hooks it on the protein, as a result the protein in question becomes active, hence the name kinase.

Answer 2

Kinases are very common enzymes. They are also called phosphotransferases.

A kinase transfers a phosphate group from a high-energy molecule (often ATP) to the protein. This often "activates" the protein. Phosphorylation of proteins play major roles in cell signaling and many other functions.