全基因组分析揭示了HSD的逐步起源和功能多样化,从较低到较高的植物物种
Noor Saleem1, Usman Aziz1, Muhammad Ali2
1College of Agronomy, Northwest A & F University, Yangling, China.
Frontiers in plant science
|July 3, 2023
概括
这项研究揭示了植物中类固醇脱酶 (HSD) 的进化史,确定了HSD1.
科学领域:
- 植物遗传学和进化研究
- 植物酶的分子生物学
背景情况:
- 氧类固醇脱酶 (HSD) 是植物中关键的固醇蛋白,属于短链脱酶/还原酶 (SDR) 超级家族.
- 虽然HSD在植物中得到了很好的研究,但它们的进化分歧和差异化在很大程度上仍未被探索.
研究的目的:
- 为了阐明HSD基因在64个测序的植物基因组中的进化轨迹.
- 分析植物HSDs的起源,分布,重复模式,进化路径,域函数,图案组成,物理化学性质和 cis调节元素.
主要方法:
- 使用64种植物基因组的综合方法进行比较基因组学.
- 对HSD蛋白序列的遗传学分析.
- 基因结构,复制,物理化学性质和cis元素分析.
主要成果:
- 从较低的植物到较高的植物 (除藻类外),HSD1广泛传播,而HSD5是陆地植物的特异性.
- 遗传学分析表明HSD1起源于植物,HSD5后来在陆地植物中出现.
- HSD基因表现出保存的结构 (六个外体),主要经历细分重复,并具有各种物理化学性质,表明各种功能; cis元素表明在非生物应激中的作用.
- 种子中HSD1和HSD5的高表达表明它们在脂肪酸代谢中的作用.
结论:
- 这项研究为植物HSD提供了全面的进化框架,追溯了它们的起源和多样化.
- 植物HSD可能在适应非生物压力和种子脂质代谢中发挥重要作用.
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