相关实验视频

Updated: Jan 15, 2026

Assaying Proteasomal Degradation in a Cell-free System in Plants

Assaying Proteasomal Degradation in a Cell-free System in Plants

Published on: March 26, 2014

一个由光控制的泛素修饰级联通过协调PIN3a蛋白解来调节棉纤维的发育

Liuqin Zhang^1,2, Yanling Zhou^1,2, Xingxian Fu^1,2

¹College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, P. R. China.

|October 8, 2025

概括

光通过控制 GhPIN3a 蛋白质的稳定性来调节棉纤维的发育. 这涉及GhCOP1-GhUCH3模块,该模块调节GhPIN3a的无处不在和降解,以响应光信号.

科学领域:

植物生物学植物生物学
分子生物学分子生物学
农业科学农业科学

背景情况:

通过PIN介导的辅酶运输对植物器官生成至关重要,但光在调节PIN定位中的作用尚不清楚.
棉花纤维的发育,对于这一关键作物至关重要,依赖于阳光,但基本的分子机制仍然在很大程度上是未知的.

研究的目的:

阐明光调节PIN3a局部化和棉纤维发育中的稳定性的机制.
确定参与光介导棉纤维生长的关键监管组件.

主要方法:

研究了 GhPIN3a 在对光的反应中无处不在和降解的作用.
确定了 GhCOP1 作为 GhUCH3 和 GhPIN3a 的光敏调节器.
描述了 GhUCH3 和 GhPIN3a 在调节蛋白质稳定性方面的相互作用.

主要成果:

光线通过抑制GhPIN3a无处不在和降解来促进棉纤维的启动和延长,增强其血膜局部化.
GhCOP1控制了 GhPIN3a 在对光的反应中随处可见度介导的降解.
GhCOP1-GhUCH3模块通过无素蛋白酶体系统 (UPS) 和真空降解通路调节 GhPIN3a 的稳定性.

结论:

通过 GhCOP1-GhUCH3 模块调节的 GhPIN3a 稳定的新型光调节机制已经被发现.
这种调节级联将光信号转化为发育线索,影响棉花纤维的发育,并可能提高作物产量.

更多相关视频

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

Published on: October 14, 2022

Profiling of H3K4me3 Modification in Plants using Cleavage under Targets and Tagmentation

Profiling of H3K4me3 Modification in Plants using Cleavage under Targets and Tagmentation

Published on: April 22, 2022

相关概念视频

Regulated Protein Degradation

Regulated Protein Degradation

It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...

Anaphase Promoting Complex

Anaphase Promoting Complex

The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...

Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....

The Spindle Assembly Checkpoint

The Spindle Assembly Checkpoint

The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...

The Proteasome

The Proteasome

Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...

The Proteasome

The Proteasome

Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...