Journal
FEBS LETTERS
Volume 589, Issue 20, Pages 3071-3078Publisher
WILEY
DOI: 10.1016/j.febslet.2015.08.045
Keywords
Norspermidine; Polyamine oxidase; Spermidine; Spermine; Thermospermine; Selaginella lepidophylla
Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT) [26.04081, 15K14705, 25-5682]
- JSPS postdoctoral fellowship
- Grants-in-Aid for Scientific Research [15K14705] Funding Source: KAKEN
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In the phylogeny of plant polyamine oxidases (PAOs), clade III members from angiosperms, such as Arabidopsis thaliana PAO5 and Oryza sativa PAO1, prefer spermine and thermospermine as substrates and back-convert both of these substrates to spermidine in vitro. A clade III representative of lycophytes, Se1PAO5 from Selaginella lepidophylla, also prefers spermine and thermospermine but instead back-converts these substrates to spermidine and norspermidine, respectively. This finding indicates that the clade III PAOs of lycophytes and angiosperms oxidize thermospennine at different carbon positions. We discuss the physiological significance of this difference. (C) 2015 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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