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Thermospermine synthase

Class of enzymes

Field	Value
Name	Thermospermine synthase
EC_number	2.5.1.79

Thermospermine synthase (, 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 \rightleftharpoons S-methyl-5'-thioadenosine + thermospermine + H+

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

References

(November 2008). "Investigations about N-aminopropyl transferases probably involved in biomineralization". Journal of Physiology and Pharmacology.
(June 2007). "Putative spermine synthases from Thalassiosira pseudonana and Arabidopsis thaliana synthesize thermospermine rather than spermine". FEBS Letters.
(August 2008). "ACAULIS5 controls Arabidopsis xylem specification through the prevention of premature cell death". Development.

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ec-2.5.1

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