5-oxoproline(redirected from pyrrolidone-5-carboxylate)
A keto derivative of proline that is formed nonenzymatically from glutamate, glutamine, and γ-glutamylated peptides; it is also produced by the action of γ-glutamylcyclotransferase; elevated levels of 5-oxoproline are often associated with problems of glutamine or glutathione metabolism.
5-oxoproline/5-oxo·pro·line/ (-pro´lēn) an acidic lactam of glutamic acid occurring at the N-terminus of several peptides and proteins.
a modified amino acid occurring in several proteins. Called also pyroglutamic acid.