کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5788424 | 1642460 | 2017 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical evidence for dammarenediol, a bioactive angiosperm metabolite, from 54Â Ma old fossil resins
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فسیل شناسی
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چکیده انگلیسی
Plants produce various types of terpenoids that play an important role in the interaction of the plant with its environments. The last two decades have seen considerable progress in elucidating plant terpenoid biosynthetic pathways at the gene and enzyme levels. However, the biosynthetic evolution of these natural products remains poorly understood. We have addressed this knowledge gap by demonstrating the geological preservation of a bioactive angiosperm metabolite. Specifically, we report the presence of 20,24-epoxy-25 hydroxy dammaran-3-ol, an oxidative product of dammarenediol, from 54Â Ma old dipterocarp-derived dammar resins. Other dammarane-type triterpenoids such as 20,24-epoxy-25-hydroxydammaran-3-one and hexakisnor-dammaran-3,20-dione were also present in the solvent extracts of the fossilized resins. Dammarenediol is the main precursor of several ginsenosides which have many pharmacological effects. It's occurrence in early Eocene sediments unequivocally demonstrates that plants from this period had produced the enzyme dammarenediol cyclase that catalyzes the cyclization of 2,3-oxidosqualene into dammarenediol. This study opens new avenues for research into evolution of important plant metabolites in deep-time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Review of Palaeobotany and Palynology - Volume 237, February 2017, Pages 96-99
Journal: Review of Palaeobotany and Palynology - Volume 237, February 2017, Pages 96-99
نویسندگان
Suryendu Dutta, Monalisa Mallick,