Abstract
Withanolides are highly oxygenated natural products. These C28 steroids with ergostane-based skeletons functionalized at C-22 and C-26 form six-membered δ-lactone rings. Withanolides containing a δ-lactone side chain often occur in Solanaceae and have a variety of biological activities because of their complicated structures. Characteristic spectroscopic behaviors and biosynthesis of withanolides are conducive to their structural elucidation and “biomimetic synthesis”, respectively. However, the last review to summarize their spectroscopic features and biosynthesis was in 1996. Since then, many withanolides with novel structures have been described by their spectra with biosynthesis investigated with many bioassays. This review surveys δ-lactone withanolides and emphasizes their spectral features, configurations and biosynthetic genes. The period reviewed includes through January 2014. We also include phytochemical species.
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Abbreviations
- AD:
-
Alzheimer’s disease
- CAS:
-
Cycloartenol synthase
- CD:
-
Circular dichroism spectroscopy
- CID-MS/MS:
-
Low-energy collision-induced dissociation tandem mass spectrometric
- CIP:
-
Cahn–Lngold–Prelog
- CPR:
-
NADPH-cytochrome P450 reductase
- CYPs:
-
Cytochrome P450s
- DMAPP:
-
Dimethylallyl diphosphate
- DOXP:
-
1-Deoxy-D-xylulose-5-phosphate
- EI-MS:
-
Electron impact mass spectra
- ER:
-
Endoplasmic reticulum
- ESI-MS:
-
Electrospray ionization mass spectrometry
- ESI-QqTOF-MS/MS:
-
Electrospray-ionization quadropole time-of-flight tandem mass spectrometry
- FPPS:
-
Farnesyl diphosphate synthase
- GPP:
-
Geranyl diphosphate
- HMG-CoA:
-
3-Hydroxy-3-methylglutaryl coenzyme A
- HMGR:
-
3-Hydroxy-3-methylglutaryl coenzyme A reductase
- LAS:
-
Lanosterol synthase
- LC/IT-MS:
-
Liquid-chromatography ion-trap mass spectrometry
- IPP:
-
Isopentenyl diphosphate
- IR:
-
Infrared spectroscopy
- MEP:
-
2-C-methyl-D-erythritol-4-phosphate
- MS:
-
Mass spectrometry
- MVA:
-
Mevalonate
- NMR:
-
Nuclear magnetic resonance
- ODM:
-
Obtusifoliol demethylase
- OSCs:
-
Oxidosqualene cyclase
- SMT-1:
-
Sterol methyltransferase
- SQE:
-
Squalene epoxidase
- SQS:
-
Squalene synthase
- UV:
-
Utraviolet spectrum
- VDW:
-
Van der Waals’ force
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Acknowledgments
We thank the authors of all the references cited herein for their valuable contributions. This work was financially sponsored by the Chang Jiang Scholar Candidates Program for Provincial Universities in Heilongjiang (2013CJHB006).
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Bing-You Yang and Yong-Gang Xia have contributed equally to this work.
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Yang, BY., Xia, YG., Pan, J. et al. Phytochemistry and biosynthesis of δ-lactone withanolides. Phytochem Rev 15, 771–797 (2016). https://doi.org/10.1007/s11101-015-9420-6
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DOI: https://doi.org/10.1007/s11101-015-9420-6