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関連する概念動画

Mismatch Repair01:36

Mismatch Repair

Overview
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
DNA-only Transposons02:57

DNA-only Transposons

DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
The donor site from where the transposon is excised is either degraded or...
Mismatch Repair01:20

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...
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Transposons01:24

Transposons

Transposons, or "jumping genes," are small mobile genetic elements (MGEs) that range from 700 to 40,000 base pairs in length. They are found in all organisms and can move within the same chromosome or transfer to different chromosomes. In some cases, transposons can also jump between different host DNA molecules, such as plasmids or viruses, contributing to genetic variability.Barbara McClintock first discovered these mobile genetic elements in the 1940s while studying maize genetics, and she...

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関連する実験動画

Updated: Jun 26, 2026

Generating Transposon Insertion Libraries in Gram-Negative Bacteria for High-Throughput Sequencing
08:19

Generating Transposon Insertion Libraries in Gram-Negative Bacteria for High-Throughput Sequencing

Published on: July 7, 2020

Mu挿入は,5塩基対の配列をホストの挿入部位で複製する.

B Allet

    Cell
    |January 1, 1979
    PubMed
    まとめ

    バクテリオファージム・ライソゲニゼーションは,宿主DNAの挿入部位で5つの塩基対の複製を伴う. これは,挿入配列 (IS) 要素の動作に類似した,Mu DNAの側面に直接繰り返しを導きます.

    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
    • 微生物学 微生物学とは

    背景:

    • リソゲン系バクテリオファージは,DNAを宿主ゲノムに統合する.
    • バクテリオファージのMu統合のメカニズムを理解することは,分子生物学にとって極めて重要です.
    • 以前の研究ではDNA統合を調査したが,挿入部位での詳細な配列分析は欠けていた.

    研究 の 目的:

    • 溶解性MuDNAの統合部位にある核酸配列を分析する.
    • MuDNA統合が宿主DNA配列の変化を引き起こすかどうかを判断する.
    • Muの統合メカニズムを他の移動性遺伝子要素と比較する.

    主な方法:

    • 溶解性MuDNAの両端にある核酸配列の分析.
    • MuDNAのクローニングは,lambda Muハイブリッド粒子に終わります.
    • 分析のために,lambdaplac5の lacZ領域内のMuリンソゲンを利用する.

    主要な成果:

    • ミュ lysogenizationは,挿入部位で5塩基対のラックDNAの複製と関連しています.
    • 統合されたMuDNAは,これらの5つの塩基対の2つのコピーに囲まれており,直接の繰り返しとして指向されています.

    さらに関連する動画

    Following the Dynamics of Structural Variants in Experimentally Evolved Populations
    04:52

    Following the Dynamics of Structural Variants in Experimentally Evolved Populations

    Published on: February 3, 2023

    Identification of Functionally-Relevant Lentivirus Integration Sites in an Insertional Mutagenesis Cell Library
    07:28

    Identification of Functionally-Relevant Lentivirus Integration Sites in an Insertional Mutagenesis Cell Library

    Published on: January 10, 2025

    関連する実験動画

    Last Updated: Jun 26, 2026

    Generating Transposon Insertion Libraries in Gram-Negative Bacteria for High-Throughput Sequencing
    08:19

    Generating Transposon Insertion Libraries in Gram-Negative Bacteria for High-Throughput Sequencing

    Published on: July 7, 2020

    Following the Dynamics of Structural Variants in Experimentally Evolved Populations
    04:52

    Following the Dynamics of Structural Variants in Experimentally Evolved Populations

    Published on: February 3, 2023

    Identification of Functionally-Relevant Lentivirus Integration Sites in an Insertional Mutagenesis Cell Library
    07:28

    Identification of Functionally-Relevant Lentivirus Integration Sites in an Insertional Mutagenesis Cell Library

    Published on: January 10, 2025

  • 独立した調査は,異なるミュライゾーゲンを用いてこれらの発見を確認した.

    • 結論:

    • バクテリオファージのMu統合には,標的部位で5塩基対の重複が関与し,直接的な繰り返しを生み出します.
    • MuDNA挿入メカニズムは,挿入配列 (IS) 媒介のDNA挿入と類似性を共有しています.
    • この発見は,ウイルスDNA統合とゲノム進化の分子メカニズムについての洞察を提供します.