関連する実験動画
Updated: May 8, 2026

11:40
Preparation of the Mgm101 Recombination Protein by MBP-based Tagging Strategy
Published on: June 25, 2013
再結合における芽生える酵母のMre11の複雑な形成と機能的多用途性
Cell
|December 9, 1998
まとめ
S. cerevisiaeのMre11タンパク質複合体は,二次分裂中の二重鎖破裂 (DSB) の修復に二重の役割を果たしています. その N 端末領域は DSB 処理を処理し,C 端末領域は DSB 形成に不可欠です.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 細胞生物学 細胞生物学
背景:
- MEIOTIC再結合は,ダブルストランドブレイク (DSB) の形成と処理を含む.
- Mre11-Rad50-Xrs2複合体は,DSB処理に不可欠であり,DSB形成にも参加しています.
- これらの結合プロセスにおけるMre11の特定の役割については,さらなる解明が必要である.
研究 の 目的:
- 介質再結合中のS. cerevisiaeのMre11の異なる機能領域を区切る.
- Mre11のN端末とC端末の領域が,DSBの形成と処理に与える特定の貢献を理解する.
- DSB修復におけるMre11のヌクレアース活動の異なる要求を調査する.
主な方法:
- 遺伝子操作によるMre11機能ドメインの分析.
- バイオケミカルアッセイは,DNA結合とヌクレアゼの活動を評価するためのものです.
- Mre11とRad50および他のメオティックタンパク質との相互作用の調査.
- メチルメタネスルフォナートによるDSBの修復におけるMre11の役割の評価.
主要な成果:
- Mre11のC末端領域は,特にDSB形成に必要であり,中性タンパク質と相互作用する.
- Mre11のN端半分には,DSB処理に不可欠な核酵素活性が含まれています.
- Mre11は,DSBの形成と処理のための明確なDNA結合部位を有しています.
- Mre11はRad50と2つの異なる領域を通じて相互作用する.
- メチルメタネスルフォナート誘発のDSBのMre11媒介による修復には,核酸に依存する経路と,核酸に依存しない経路の両方が含まれます.
結論:
- Mre11は,メオシスにおけるDSB管理の異なる段階を担当する異なるドメインを持つモジュール状のタンパク質として機能します.
- DSBの形成と処理の空間的および時間的な分離は,Mre11のドメイン組織に反映されています.
- Mre11の二重の役割を理解することで,中性再結合とDNA修復の複雑なメカニズムを洞察できます.
関連する概念動画
Mismatch Repair
Overview
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...
Mismatch Repair
Overview
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...
Mismatch Repair
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Homologous Recombination
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...

