tRNA-uridine aminocarboxypropyltransferase activity
trna-uridine aminocarboxypropyltransferase activity
Catalysis of the reaction: a uridine in tRNA + S-adenosyl-L-methionine = a 3-[(3S)-3-amino-3-carboxypropyl]uridine in tRNA + S-methyl-5'-thioadenosine + H+.