Thermospermine synthase

Thermospermine synthase (EC 2.5.1.79, TSPMS, ACL5 (ACAULIS5), SAC51) is an enzyme with systematic name S-adenosylmethioninamine:spermidine 3-aminopropyltransferase (thermospermine synthesizing).^[1][2][3] This enzyme catalyses the following chemical reaction

S-adenosylmethioninamine + spermidine ${\displaystyle \rightleftharpoons }$ S-methyl-5'-thioadenosine + thermospermine + H⁺

Thermospermine synthase
Identifiers
EC no.	2.5.1.79
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

This enzyme is required for correct xylem specification through regulation of the lifetime of the xylem elements.