Homospermidine synthase

Homospermidine synthase (EC 2.5.1.44) is an enzyme with systematic name putrescine:putrescine 4-aminobutyltransferase (ammonia-forming).^{[1][2][3][4][5][6]} This enzyme catalyses the following chemical reaction

(1) 2 putrescine ${\displaystyle \rightleftharpoons }$ sym-homospermidine + NH₃ + H⁺

(2) putrescine + spermidine ${\displaystyle \rightleftharpoons }$ sym-homospermidine + propane-1,3-diamine

Homospermidine synthase
Identifiers
EC no.	2.5.1.44
CAS no.	76106-84-8
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Search PMC articles PubMed articles NCBI proteins

The reaction of this enzyme occurs in three steps.

See also

DHPS