Putrescine aminotransferase

Putrescine aminotransferase (EC 2.6.1.82, putrescine-alpha-ketoglutarate transaminase, YgjG, putrescine:alpha-ketoglutarate aminotransferase, PAT, putrescine:2-oxoglutarate aminotransferase, putrescine transaminase) is an enzyme with systematic name butane-1,4-diamine:2-oxoglutarate aminotransferase. This enzyme catalyses the following chemical reaction

putrescine + 2-oxoglutarate ⇌ 1-pyrroline + L-glutamate + H₂O (overall reaction)(1a) putrescine + 2-oxoglutarate ⇌ 4-aminobutanal + L-glutamate(1b) 4-aminobutanal ⇌ 1-pyrroline + H₂O (spontaneous)

This enzyme is a pyridoxal-phosphate protein.