通过六种Physcomitrella prolyl-4氧化酶进行差异性基化
Christine Rempfer1,2, Sebastian N W Hoernstein1, Nico van Gessel1
1Plant Biotechnology, Faculty of Biology, University of Freiburg, Schaenzlestr. 1, 79104 Freiburg, Germany.
Computational and structural biotechnology journal
|July 18, 2024
概括
这项研究确定了六种的prolyl-4-hydroxylases (P4Hs),并揭示了植物蛋白中的化模式. P4H1淘汰赛显著降低了产生的红色素 (EPO) 中的O-糖化.
科学领域:
- 植物生物化学 植物生物化学
- 蛋白质修饰是一种蛋白质修饰.
- 酶学 是一种酶学.
背景情况:
- -4-基酶 (P4Hs) 调解的化,这对于植物糖蛋白至关重要,但在药品中是不受欢迎的.
- 现有的普罗林氧化基因缺乏来自像Physcomitrella这样的的数据.
研究的目的:
- 为了识别P4Hs和表征普罗林氧化模式在Physcomitrella.
- 调查P4Hs在植物制药的O-糖化中的作用,例如红素 (EPO).
主要方法:
- 遗传学重建以识别六个的P4Hs.
- 在24种分泌蛋白中对73种氧素 (Hyps) 进行质谱分析.
- 在P4H淘汰突变体上进行AlphaFold建模和定量蛋白质组学.
- 定量RT-PCR用于分析基因表达.
主要成果:
- 氨酸氧化主要发生在其他氨酸,氨酸,氨酸,氨酸,氨酸和氨酸附近 (AOV动机最常见).
- 95%的Hyps是使用既定方法可以预测的;基化发生在无序区域的蛋白质表面上.
- 由产生的EPO显示O-糖化,在p4h1淘汰突变体中显著降低.
- P4H淘汰导致特定蛋白质量变化和修改的基化模式,表明P4H功能差异.
结论:
- P4Hs表现出特定的氧化偏好和功能.
- 向P4H1可以减少植物制药中的不良O-糖化.
- 不同的基因表达表明P4H基因之间的补偿机制.
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