ID   1.4.3.27
DE   homospermidine oxidase.
CA   H2O + 2 O2 + sym-homospermidine = 1-formylpyrrolizidine + 2 H2O2 +
CA   2 NH4(+).
CC   -!- The copper-containing enzyme has been isolated from the plant
CC       Heliotropium indicum.
CC   -!- It is involved in the biosynthesis of the pyrrolizidine alkaloid (-)-
CC       trachelanthamidine which acts as a secondary metabolite for the
CC       defense against herbivores.
CC   -!- The oxidation of sym-homospermidine proceeds in three steps and
CC       results in a cyclization.
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