EC 2.3.1.138     
Accepted name: putrescine N-hydroxycinnamoyltransferase
Reaction: caffeoyl-CoA + putrescine = CoA + N-caffeoylputrescine
Glossary: putrescine = butane-1,4-diamine
Other name(s): caffeoyl-CoA putrescine N-caffeoyl transferase; PHT; putrescine hydroxycinnamoyl transferase; hydroxycinnamoyl-CoA:putrescine hydroxycinnamoyltransferase; putrescine hydroxycinnamoyltransferase
Systematic name: caffeoyl-CoA:putrescine N-(3,4-dihydroxycinnamoyl)transferase
Comments: Feruloyl-CoA, cinnamoyl-CoA and sinapoyl-CoA can also act as donors, but more slowly.
References:
1.  Negrel, J. The biosynthesis of cinnamoylputrescines in callus-tissue cultures of Nicotiana tabacum. Phytochemistry 28 (1989) 477–481.
[EC 2.3.1.138 created 1992]