関連する実験動画
Updated: May 10, 2026

11:36
In Vitro Ubiquitination and Deubiquitination Assays of Nucleosomal Histones
Published on: July 25, 2019
新しいDUBは,線形的な至る所に存在するものを,自滅の当事者にする
Reuven Wiener1, Cynthia Wolberger
1Department of Biochemistry and Molecular Biology, the Institute for Medical Research Israel-Canada, Hadassah Medical School, Hebrew University, Jerusalem 91120, Israel.
Cell
|June 11, 2013
まとめ
研究者らは,核因子 κB 信号伝達に不可欠な線形ユビキチン鎖を除去する新しい酵素を発見した. このデウビキチン化酵素は,ペプチド結合を分解するために,ユビキチンそのものを含むユニークなメカニズムを使用します.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 細胞シグナル伝達 細胞信号伝達
背景:
- 線形ユビキチン (Ub) 鎖は,核因子 κB (NF-κB) 信号伝達経路の重要な調節体である.
- 線形ユビキチン鎖の除去を担当する特定のデウビキチン化酵素は未特定であり,NF-κB調節の完全な理解を妨げました.
研究 の 目的:
- 線形ユビキチン鎖を特に割るデウビキキチン化酵素を特定する.
- この酵素が線形Ub鎖を分解する際に使用する触媒機構を解明する.
主な方法:
- 線形Ub鎖に対するデウビキチン化酵素活性をテストする生化学的測定法.
- 特定された酵素のタンパク質浄化と特徴付け.
- 酵素の作用様式を理解するために,構造とメカニズムの研究を行う.
主要な成果:
- 線形ユビキチン鎖の特異性を有する新しいデウビキチン化酵素の特定.
- 酵素がユビキチン自身を含むユニークな触媒メカニズムを使用していることを示す.
- NF-κBシグナル伝達を調節する酵素の役割の解明.
結論:
- 新しく特定された酵素は,線形ユビキチン鎖のターンオーバーを制御するために不可欠です.
- 酵素の自己触媒メカニズムは,酵素機能のデウビキチン化に関する新しい洞察を提供します.
- この発見は,ユビキチンシグナル伝達とNF-κB経路の調節に関する私たちの理解を前進させます.
関連する概念動画
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...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
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...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
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 (ubiquitin...
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 (ubiquitin...
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...
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...
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.
These groups modify specific amino acids in a protein.
Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...

