Carboxynorspermidine synthase

Carboxynorspermidine synthase (, carboxynorspermidine dehydrogenase, carboxyspermidine dehydrogenase, CASDH, CANSDH) is an enzyme with systematic name carboxynorspermidine:NADP+ oxidoreductase.  This enzyme catalyses the following chemical reactions

 (1) carboxynorspermidine + H2O + NADP+  L-aspartate 4-semialdehyde + propane-1,3-diamine + NADPH + H+
 (2) carboxyspermidine + H2O + NADP+  L-aspartate 4-semialdehyde + putrescine + NADPH + H+

The reaction takes place in the opposite direction. 

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Category:EC 1.5.1