Tags: Enzyme.
Thermospermine synthase (EC 2.5.1.79 TSPMS ACL5 SAC51) is an enzyme with system name S-adenosylmethioninamine:spermidine 3-aminopropyltransferase (thermospermine synthesizing). This enzyme catalyses the following chemical reaction S-adenosylmethioninamine + spermidine S-methyl-5′-thioadenosine + thermospermine + H+This enzyme is required for correct xylem specification through regulation of the lifetime of the xylem elements.