Subtopic Deep Dive
Biosynthesis of Plant Triterpenoids
Research Guide
What is Biosynthesis of Plant Triterpenoids?
Biosynthesis of plant triterpenoids involves enzymatic pathways starting from squalene via oxidosqualene cyclases (OSCs) and cytochrome P450s (CYPs) to produce diverse bioactive pentacyclic structures in medicinal plants.
Key pathways include β-amyrin and lupeol formation in species like Artemisia annua and Aralia elata, with gene duplications driving diversity (Wang et al., 2022; 94 citations). Studies identify OSC2 and CYP716A14v2 for cuticle triterpenoids (Moses et al., 2015; 104 citations). Over 20 papers detail metabolic engineering for enhanced yields (Moses et al., 2013; 228 citations).
Why It Matters
Triterpenoids like ursolic acid and betulinic acid show anticancer activity against breast cancer via apoptosis induction (Bishayee, 2010; 327 citations; Shanmugam et al., 2013; 318 citations). Biosynthetic elucidation enables metabolic engineering for sustainable production in plants like loquat, aiding drug discovery (Su et al., 2021; 95 citations). This supports pharmacological screening for leishmaniasis and wound healing (Gervazoni et al., 2020; 110 citations; Beserra et al., 2018; 90 citations).
Key Research Challenges
Gene cluster identification
Genome assemblies reveal tandem duplications in Aralia elata but miss cryptic clusters (Wang et al., 2022; 94 citations). Functional validation of OSCs and CYPs requires heterologous expression (Moses et al., 2015; 104 citations).
Yield enhancement barriers
Polyploidy diversifies pathways in apple tribe but complicates engineering (Su et al., 2021; 95 citations). Rate-limiting CYPs limit triterpenoid accumulation despite OSC overexpression (Moses et al., 2013; 228 citations).
Pathway elucidation gaps
Diversity from deletions in biosynthetic genes hinders prediction (Wang et al., 2022; 94 citations). Cuticle-specific triterpenoids require organ-specific transcriptomics (Moses et al., 2015; 104 citations).
Essential Papers
Natural products in drug discovery: advances and opportunities
Atanas G. Atanasov, Sergey B. Zotchev, Verena M. Dirsch et al. · 2021 · Nature Reviews Drug Discovery · 4.5K citations
Natural products and their structural analogues have historically made a major contribution to pharmacotherapy, especially for cancer and infectious diseases. Nevertheless, natural products also pr...
Triterpenoids as potential agents for the chemoprevention and therapy of breast cancer
Anupam Bishayee · 2010 · Frontiers in bioscience · 327 citations
Breast cancer remains a major cause of death in the United States as well as the rest of the world. In view of the limited treatment options for patients with advanced breast cancer, preventive and...
Ursolic acid in cancer prevention and treatment: Molecular targets, pharmacokinetics and clinical studies
Muthu K. Shanmugam, Xiaoyun Dai, Alan Prem Kumar et al. · 2013 · Biochemical Pharmacology · 318 citations
Bioengineering of plant (tri)terpenoids: from metabolic engineering of plants to synthetic biology <i>in vivo</i> and <i>in vitro</i>
Tessa Moses, Jacob Pollier, Johan M. Thevelein et al. · 2013 · New Phytologist · 228 citations
Summary Terpenoids constitute a large and diverse class of natural products that serve many functions in nature. Most of the tens of thousands of the discovered terpenoids are synthesized by plants...
New Pharmacological Opportunities for Betulinic Acid
José Luis Rı́os, Salvador Máñez · 2017 · Planta Medica · 174 citations
Abstract Betulinic acid is a naturally occurring pentacyclic lupane-type triterpenoid usually isolated from birch trees, but present in many other botanical sources. It is found in different plant ...
Use of Natural Products in Leishmaniasis Chemotherapy: An Overview
Luiza F. O. Gervazoni, Gabrielle Barcellos, Taiana Ferreira-Paes et al. · 2020 · Frontiers in Chemistry · 110 citations
Leishmaniasis is an infectious parasitic disease that is caused by protozoa of the genus Leishmania , a member of the Trypanosomatidae family. Leishmaniasis is classified by the World Health Organi...
OSC2 and CYP716A14v2 Catalyze the Biosynthesis of Triterpenoids for the Cuticle of Aerial Organs of <i>Artemisia annua</i>
Tessa Moses, Jacob Pollier, Qian Shen et al. · 2015 · The Plant Cell · 104 citations
Artemisia annua is widely studied for its ability to accumulate the antimalarial sesquiterpenoid artemisinin. In addition to producing a variety of sesquiterpenoids, A. annua also accumulates mono-...
Reading Guide
Foundational Papers
Start with Moses et al. (2013; 228 citations) for bioengineering overview, Bishayee (2010; 327 citations) for bioactivity context, and Confalonieri et al. (2008; 64 citations) for early yield engineering examples.
Recent Advances
Study Wang et al. (2022; 94 citations) on Aralia gene deletions, Su et al. (2021; 95 citations) on polyploidy diversification, and Moses et al. (2015; 104 citations) for Artemisia cuticle pathways.
Core Methods
Oxidosqualene cyclase assays, CYP450 co-expression in yeast/ E. coli, LC-MS metabolomics, and genome-guided transcriptomics define core techniques (Moses et al., 2015; Wang et al., 2022).
How PapersFlow Helps You Research Biosynthesis of Plant Triterpenoids
Discover & Search
Research Agent uses searchPapers('"triterpenoid biosynthesis" AND plant') to find Moses et al. (2015; 104 citations), then citationGraph reveals upstream OSC papers and findSimilarPapers uncovers Wang et al. (2022; 94 citations) on gene duplications.
Analyze & Verify
Analysis Agent applies readPaperContent on Moses et al. (2015) to extract CYP716A14v2 pathway details, verifyResponse with CoVe cross-checks claims against Shanmugam et al. (2013), and runPythonAnalysis parses yield data from Confalonieri et al. (2008) with GRADE scoring for statistical significance.
Synthesize & Write
Synthesis Agent detects gaps in polyploidy engineering from Su et al. (2021), flags contradictions between Moses et al. (2013) and Wang et al. (2022), while Writing Agent uses latexEditText, latexSyncCitations for 10+ refs, latexCompile pathway diagrams, and exportMermaid for OSC-CYP cascades.
Use Cases
"Extract and plot triterpenoid yield data from overexpression studies in Medicago truncatula."
Research Agent → searchPapers → Analysis Agent → readPaperContent(Confalonieri et al., 2008) → runPythonAnalysis(pandas plot of β-amyrin levels) → matplotlib yield graph.
"Draft LaTeX figure of Artemisia annua triterpenoid pathway with citations."
Research Agent → findSimilarPapers(Moses et al., 2015) → Synthesis Agent → gap detection → Writing Agent → latexGenerateFigure → latexSyncCitations(5 refs) → latexCompile PDF.
"Find GitHub repos with code for triterpenoid gene cluster analysis."
Research Agent → searchPapers(Wang et al., 2022) → Code Discovery → paperExtractUrls → paperFindGithubRepo → githubRepoInspect(duplication detection scripts) → exportCsv.
Automated Workflows
Deep Research workflow scans 50+ triterpenoid papers via searchPapers and citationGraph, producing structured reports on OSC/CYP evolution with GRADE-verified claims from Moses et al. (2013). DeepScan applies 7-step CoVe to validate biosynthetic yields in Su et al. (2021), checkpointing polyploidy data. Theorizer generates hypotheses on gene deletions from Wang et al. (2022) literature synthesis.
Frequently Asked Questions
What defines plant triterpenoid biosynthesis?
It starts with squalene epoxidation to 2,3-oxidosqualene, cyclized by OSCs into protosteryl or dammaryl cations, then oxidized by CYPs (Moses et al., 2013).
What are key methods in this field?
Heterologous expression in yeast/ Nicotiana, CRISPR editing of gene clusters, and metabolomics validate pathways (Moses et al., 2015; Wang et al., 2022).
What are seminal papers?
Moses et al. (2013; 228 citations) reviews bioengineering; Bishayee (2010; 327 citations) details breast cancer applications; Moses et al. (2015; 104 citations) identifies Artemisia OSC/CYP.
What open problems exist?
Predicting triterpenoid diversity from gene duplications, scaling microbial production, and organ-specific regulation remain unsolved (Wang et al., 2022; Su et al., 2021).
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