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Thermospermine synthase

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Thermospermine synthase (EC 2.5.1.79, TSPMS, ACL5 (ACAULIS5), SAC51) is an enzyme characterised from Thalassiosira pseudonana and Arabidopsis thaliana with systematic name S-adenosylmethioninamine:spermidine 3-aminopropyltransferase (thermospermine synthesizing).[1] It catalyses a chemical reaction in which an aminopropyl group is transferred from the coenzyme, S-adenosylmethioninamine to spermidine, giving thermospermine:[2][3]

2D representation of the chemical structure of spermidine .
spermidine
+ S-adenosyl
methioninamine
 
 
 
 
Rightward reaction arrow
 
 
 
2D representation of the chemical structure of Q3984484.
thermospermine
+ 5′-methylthio
adenosine
 
EC no.2.5.1.79
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Thermospermine synthase
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EC no.2.5.1.79
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This enzyme is required for correct xylem specification through regulation of the lifetime of the xylem elements.[4]

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