Putrescine aminotransferase

UniProtKB accession:  P42588

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Catalyzes the aminotransferase reaction from putrescine to 2-oxoglutarate, leading to glutamate and 4-aminobutanal, which spontaneously cyclizes to form 1-pyrroline (PubMed:12617754, PubMed:3510672). This is the first step in one of two pathways for putrescine degradation, where putrescine is converted into 4-aminobutanoate (gamma-aminobutyrate or GABA) via 4-aminobutanal, which allows E.coli to grow on putrescine as the sole nitrogen source (PubMed:3510672, PubMed:22636776). Also functions as a cadaverine transaminase in a a L-lysine degradation pathway to succinate that proceeds via cadaverine, glutarate and L-2-hydroxyglutarate (PubMed:12617754, PubMed:30498244). Is also able to transaminate spermidine, in lower extent, but not ornithine. Alpha-ketobutyrate and pyruvate can also act as amino acceptors, although much less efficiently (PubMed:12617754).