Sorghum bicolor 膜类固醇结合蛋白 1 可以结合血红素并重塑 ER 膜
Khuanpiroon Ratanasopa1,2, Rocio Ochoa-Fernandez1, Silas B Mellor1
1Department of Plant and Environmental Sciences, University of Copenhagen, 1871 Frederiksberg, Denmark.
植物类固醇结合蛋白 (MSBPs) 重塑细胞内网膜,增强盐分耐受性. 这一发现为工程植物应激弹性和代谢途径提供了潜力.
科学领域:
- 植物分子生物学 植物分子生物学
- 细胞应激反应细胞应激反应
- 生物化学 生物化学
背景情况:
- 植物膜类固醇结合蛋白 (MSBPs),是膜相关的孕激素受体 (MAPRs) 的一部分,在真核生物中发现.
- 众所周知,MSBP调节细胞染色体P450活性,结合类固醇,并有助于盐耐受性,但其精确的分子作用尚不清楚.
研究的目的:
- 研究MSBPs在Sorghum bicolor中的功能,重点关注它们在压力反应和细胞组织中的作用.
- 阐明植物中MSBP功能背后的分子机制.
主要方法:
- 在 Sorghum bicolor 中对 MAPR 基因的家族遗传学分析.
- SbMSBP1的生物物理特征,包括血红素结合和二聚化研究.
- 量化蛋白质组学以评估在盐应力下MSBP表达.
- 权重基因共同表达网络分析 (WGCNA) 来识别共同表达的基因.
- 功能性研究涉及植物细胞中SbMSBP1的过度表达.
主要成果:
- 四个 Sorghum 双色 MAPR 基因形成了一个独特的 MSBP 类,具有特定的域架构.
- SbMSBP1与血红素结合,通过血红素-血红素堆叠机制导致二元化.
- 在根和芽组织中,MSBPs因应盐应激而被上调.
- SbMSBP1的表达与参与ER重塑和囊泡运输的基因相关.
- 过度表达SbMSBP1会诱导有组织的光滑内分泌网膜 (OSER) 结构.
结论:
- SbMSBP1在重塑ER膜方面发挥作用,有助于植物对生物和非生物因素的应激弹性.
- 这些发现表明,MSBPs可以作为ER相关生物合成途径代谢工程的工具.
更多相关视频
11:44Metabolic Labeling and Membrane Fractionation for Comparative Proteomic Analysis of Arabidopsis thaliana Suspension Cell Cultures
Published on: September 28, 2013
07:10Isolation of Histone from Sorghum Leaf Tissue for Top Down Mass Spectrometry Profiling of Potential Epigenetic Markers
Published on: March 4, 2021
相关概念视频
Smooth Endoplasmic Reticulum
The ER provides optimal conditions for synthesizing steroid hormones and lipids, such as phospholipids and triglycerides. Traditionally, lipid metabolism was considered to be a smooth ER function. However, there is no direct evidence to prove that rough ER is completely excluded from lipid...
Assembly of the Lipid Bilayer in the ER
A large chunk of any biological membrane is composed of phospholipids. These lipids have a heterogeneous distribution across different subcellular organelles and even between...
Protein Modifications in the RER
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
Regulation of Nuclear Protein Sorting
Export of Misfolded Proteins out of the ER
Biosynthesis of Lipids
