Article
Thermospermine is required for stem elongation in Arabidopsis thaliana.
Plant & cell physiology - 1 Sept 2008
Kakehi Jun-ichi, Kuwashiro Yoshitaka, Niitsu Masaru, Takahashi Taku
Abstract excerpt
Loss-of-function mutants of the ACAULIS5 (ACL5) gene in Arabidopsis thaliana have severe defects in stem elongation. ACL5 was previously reported as encoding a spermine synthase. A more recent study, however, showed that the bacterial expressed recombinant ACL5 protein catalyzes the conversion of spermidine to thermospermine, a structural isomer of spermine, rather than to spermine. In the present study, we found...
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