从早期分离的Schisandra基因组对血管精子进化和谱系专业化的灵生物合成的洞察
Jiushi Liu1,2, Ruilin Xiong1,2, Leijiao Liu3
1State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, P. R. China.
Science advances
|August 15, 2025
概括
这项研究揭示了Schisandra chinensis的基因组,澄清了早期的血管种的进化,并确定了独特的肝脏保护型二子环氧化 (DBCOD) 基因子生物合成中的关键酶.
科学领域:
- 植物基因组学 植物基因组学
- 进化生物学是进化的生物学.
- 生物化学 生物化学
背景情况:
- 斯基桑德拉家族的植物产生具有肝脏保护性能的生物活性二子环氧八二烯 (DBCOD) 基.
- 对于 DBCOD 类的生物合成和进化起源尚不清楚.
- 早期血管精子系的基因组表征是不完整的.
研究的目的:
- 为了呈现一个高品质的基因组的Schisandra chinensis*,一个早期分离的血管精.
- 为了澄清 Austrobaileyales 在 angiosperms 中的进化位置.
- 阐明DBCOD干生物合成的分子机制和进化基础.
主要方法:
- 基因组测序和Schisandra chinensis的遗传学分析.
- 基因家族的识别和共同表达网络的分析.
- 生物化学试验,酶表征 (SchCYP719G1b) 和计算建模 (QM/MM).
主要成果:
- 一个高质量的 *Schisandra chinensis* 基因组被测序,完成了早期血管精子的基因组表征.
- 遗传学分析证实奥斯特罗贝莱亚尔是单种植物,大类植物和大类植物的姐妹,揭示了一种谱系特定的全基因组重复.
- 确定了DBCOD灵生物合成的五个关键步骤,包括确定SchCYP719G1b作为催化关键C-C联的酶.
- 计算和生物化学数据表明,特定的电子特性驱动了DBCOD支架形成的选择性C2─C2'合.
结论:
- 这项研究为早期的血管精子研究提供了基础基因组,并澄清了它们的进化关系.
- 已识别的生物合成途径和新型酶SchCYP719G1b揭示了DBCOD干素多样性的分子基础.
- 这些发现提升了我们对植物特种代谢物进化的理解.
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