ID   2.5.1.23
DE   sym-norspermidine synthase.
CA   propane-1,3-diamine + S-adenosyl 3-(methylsulfanyl)propylamine = H(+) +
CA   norspermidine + S-methyl-5'-thioadenosine.
CC   -!- The enzyme has been originally characterized from the protist Euglena
CC       gracilis.
CC   -!- The enzyme from the archaeon Sulfolobus solfataricus can transfer the
CC       propylamine moiety from S-adenosyl 3-(methylsulfanyl)propylamine to
CC       putrescine, sym-norspermidine and spermidine with lower efficiency.
CC       cf. EC 2.5.1.16 and EC 2.5.1.22.
DR   A2BJU2, SPEE2_HYPBU;  Q8U4G1, SPEE_PYRFU ;  Q9UXE4, SPEE_SACS2 ;
//