EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
2.5.1.44 | spermidine + cadaverine |
- |
Blastochloris viridis |
(4-aminobutyl)(5-aminopentyl)amine + sym-homospermidine + propane-1,3-diamine + putrescine |
- |
? |
2.5.1.44 | more |
despite the synthesis of homospermidine, the enzyme also produces 4-aminobutilcadaverine |
Rhizobium tropici |
? |
- |
? |
2.5.1.44 | more |
the enzyme has two distinct substrate binding sites, one of which is highly specific for putrescine. Enzyme HSS features a side pocket in the direct vicinity of the active site formed by conserved amino acids and a potential substrate discrimination, guiding, and sensing mechanism. The enzyme is capable of catalyzing side reactions to produce a variety of N-aminobutyl-linked triamines utilizing putrescine together with respective linear diamines with C3 to C7 carbon chains, overview. Bacterial HSS does not produce sym-norspermidine from two 1,4-diaminopropanes |
Blastochloris viridis |
? |
- |
? |
2.5.1.44 | more |
despite the synthesis of homospermidine, the enzyme also produces 4-aminobutilcadaverine |
Rhizobium tropici Rt CIAT899 |
? |
- |
? |
2.5.1.44 | spermidine + putrescine |
- |
Blastochloris viridis |
homospermidine + 1,3-diaminopropane |
- |
? |
2.5.1.44 | putrescine + cadaverine |
- |
Blastochloris viridis |
homospermidine + N-(4-aminobutyl)-1,5-diaminopentane |
- |
? |
2.5.1.44 | putrescine + cadaverine |
- |
Blastochloris viridis |
homospermidine + N-(4-aminobutyl)-1,5-diaminopentane |
low but significant amounts of homologous polyamines in addition to homospermidine |
? |
2.5.1.44 | spermidine + cadaverine |
- |
Blastochloris viridis |
homospermidine + N-(4-aminobutyl)-1,5-diaminopentane |
- |
? |
2.5.1.44 | putrescine + 1,6 diaminohexane |
- |
Blastochloris viridis |
homospermidine + N-(4-aminobutyl)-1,6-diaminohexane |
- |
? |
2.5.1.44 | putrescine + 1,6 diaminohexane |
- |
Blastochloris viridis |
homospermidine + N-(4-aminobutyl)-1,6-diaminohexane |
low but significant amounts of homologous polyamines in addition to homospermidine |
? |