Which of the following does not undergo phosphorylation by protein kinases?
Phosphorylation occurs at the hydroxyl groups of serine, threonine, and tyrosine. A protein kinase is a kinase enzyme that modifies other proteins by chemically adding phosphate groups to them (phosphorylation). Phosphorylation usually results in a functional change of the target protein (substrate) by changing enzyme activity, cellular location, or association with other proteins. The chemical activity of a kinase involves transferring a phosphate group from a nucleoside triphosphate (usually ATP) and covalently attaching it to one of three amino acids that have a free hydroxyl group.Most kinases act on both serine and threonine, others act on tyrosine, and a number (dual specificity kinases) act on all three. There are also protein kinases that phosphorylate other amino acids, including histidine kinases that phosphorylate histidine residues.
Threonine
Tyrosine
Asparagine
Serine
All India exam