Thermospermine synthase

Updated on Dec 09, 2023

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EC number 2.5.1.79 BRENDA BRENDA entry KEGG KEGG entry		IntEnz IntEnz view ExPASy NiceZyme view MetaCyc metabolic pathway

Thermospermine synthase (EC 2.5.1.79, TSPMS, ACL5 (ACAULIS5), SAC51) is an enzyme with systematic 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.

References

Thermospermine synthase Wikipedia

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