柏柏林生物合成的融合进化
Zhichao Xu1,2, Ya Tian1,2, Jing Wang1,2
1Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin 150040, China.
Science advances
|November 29, 2024
概括
研究人员阐明了Phellodendron amurense中的柏柏林生物合成途径,确定了新的酶并揭示了融合进化. 这一发现加深了我们对植物特种代谢和化物生产的理解.
科学领域:
- 植物生物化学和分子生物学
- 代谢学和天然产品生物合成
- 进化生物学和比较基因组学
背景情况:
- 柏柏林是一种有价值的类化合物,具有抗微生物和抗糖尿病的特性,在各种植物家族中发现,如Coptis和Phellodendron.
- 柏柏林在科普蒂斯的生物合成途径已知,但其在菲洛登德龙物种中的阐明仍然是一个重要的知识差距.
研究的目的:
- 识别和描述与Phellodendron amurense内的柏柏林生物合成有关的关键酶和步骤.
- 为了比较贝贝林生物合成途径在Phellodendron与科普蒂斯,调查潜在的进化趋同.
主要方法:
- 利用染色体层次的基因组组合和Phellodendron amurense的联合表达矩阵分析.
- 进行生物化学测试以验证已识别的生物合成步骤,包括甲基化,基化和柏柏林桥梁形成.
- 对关键酶进行结构分析和突变发生研究,如O-甲基转移酶 (PaNOMT9) 和单氧化酶 (PaCYP71BG29).
主要成果:
- 在Phellodendron amurense berberine生物合成中确定了六个关键步骤,包括一个由特定的O-甲基转移酶 (NOMT) 家族催化的新型N-甲基化步骤.
- 发现Phellodendron利用NAD(P) H依赖的单氧化酶 (PaCYP71BG29) 来形成柏柏林桥梁,与Coptis.的FAD依赖机制不同.
- 证明PaCYP71BG29源于三胺5-基酶的新功能化,突出了酶的进化适应.
结论:
- 这些发现揭示了Ranunculales (Coptis) 和Sapindales (Phellodendron) 序列之间的柏柏林生物合成的融合进化.
- 这项研究显著提升了对植物特种代谢的理解,并提供了植物用于生产有价值的二次代谢产物的进化策略的见解.
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