Transglutaminase-mediated transamidation of serotonin, dopamine and noradrenaline to fibronectin: Evidence for a general mechanism of monoaminylation

► Biochemical evidence for a new method of protein modification is provided. ► “Monoaminylation”: specific transglutaminase-mediated transamidation of monoamines. ► Identification of “monoaminylated” glutamine residues by mass spectrometry.