A proteinogenic amino acid derivative resulting from reaction of L-glutamine at the amino group, the carboxy group, or the carboxamide, or from the replacement of any hydrogen of L-glutamine by a heteroatom.
| Member | Definition | Role |
|---|
| coprine | A non-proteinogenic L-alpha-amino acid that is L-glutamine in which one of the hydrogens attached to the amide nitrogen is replaced by a 1-hydroxycyclopropyl group. Found in the ink-cap mushroom, Coprinus atramentarius, it causes an unpleasant hypersensitivity to alcohol (the 'disulfiram effect'). | coprine |
| glutaurine | A dipeptide resulting from the formal condensation of the amino group of taurine with the gamma-carboxy group of L-glutamic acid. It was initially found in the parathyroid in 1980 and later in the brain of mammals. | glutaurine zwitterion; glutaurine |
| mannopine | A hexitol derivative that is D-mannitol in which the hydroxy group at position 1 is replaced by the alpha-amino group of L-glutamine. It is produced in crown gall tumours induced in a wide range of dicotyledenous plants by Agrobacterium tumefaciens. | mannopine |
| ophthalmic acid | A L-glutamine derivative that is L-glutamine substituted by a 1-[(carboxymethyl)amino]-1-oxobutan-2-yl at the terminal amino nitrogen atom. | ophthalmic acid |