関連する実験動画
Updated: May 10, 2026

07:08
The Lambda Select cII Mutation Detection System
Published on: April 26, 2018
まとめ
バクテリオファージIntタンパク質は,特定の部位でDNAを結合させ,再結合を媒介する. この研究は,Intタンパク質がIntタンパク質であることを明らかにしています.
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
- バイオケミストリー バイオケミストリー
背景:
- 宿主ゲノムへのバクテリオファージラムダの統合にはInt.タンパク質が必要です.
- アットサイトは,Intタンパク質の固有結合領域を特徴として,この統合プロセスにとって極めて重要です.
研究 の 目的:
- フェーグアットサイトにおけるIntタンパク質の結合特性を解明する.
- Int.タンパク質によって媒介されるDNA再結合の構造と配列の要件を理解する.
主な方法:
- フェーグアットサイト内のIntタンパク質結合部位の分析.
- ディメチル硫酸の保護測定は,DNA-ヘリックス面の相互作用を決定する.
- attP,attB,および二次結合部位のシーケンス比較.
主要な成果:
- Intタンパク質は,2種類の結合部位を認識しています:アーム型とジャンクション型です.
- 交差点型のサイトは,クロスオーバー領域の近くに位置し,スレッド交換に不可欠です.
- Intタンパク質は,交差点型のサイトで同じDNAヘリックス面と相互作用する.
- 二次結合部位は,交差点型の部位と同質性を共有し,重複領域を保ちます.
結論:
- attPとattBのサイトは,2つの交差点型のInt結合サイトと重複領域を含むクロスオーバー領域の周りに重要な類似性を共有しています.
- 二次結合部位における保存された特徴は,代替的統合経路のメカニズムを示唆する.
関連する概念動画
Mismatch Repair
Overview
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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...
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Conservative Site-specific Recombination and Phase Variation
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
Single-Strand DNA Binding Proteins
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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...

