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関連する概念動画

Coordination of Gene Expression Processes in Bacteria01:29

Coordination of Gene Expression Processes in Bacteria

The DNA replication, transcription, and translation processes are intricately coupled in bacteria, allowing efficient gene expression and rapid protein synthesis. While this physical and functional coordination is advantageous, it introduces challenges that bacteria overcome through specific regulatory mechanisms.Coupling of Replication, Transcription, and TranslationThe coupling of replication, transcription, and translation is a hallmark of bacterial gene expression. As the replisome unwinds...
Antibiotic Selection00:57

Antibiotic Selection

Overview
Genome Copying Errors02:46

Genome Copying Errors

DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their  survival. Therefore, the copying errors are checked and repaired at three levels.
Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Mismatch Repair01:36

Mismatch Repair

Overview
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...

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関連する実験動画

Updated: May 16, 2026

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
14:06

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

Published on: November 12, 2012

悪化する遺伝的相互作用は,細菌の病原体における冗長性の解決を可能にします.

Tamara J O'Connor1, Dana Boyd, Marion S Dorer

  • 1Howard Hughes Medical Institute and Department of Molecular Microbiology and Microbiology, Tufts University School of Medicine, 150 Harrison Avenue, Boston, MA 02111, USA.

Science (New York, N.Y.)
|December 15, 2012
PubMed
まとめ

私たちは,複雑な宿主-病原体相互作用を理解するために,新しい遺伝子スクリーニング戦略である挿入性変異変異と枯渇 (iMAD) を開発しました. この方法では,レジオネラ肺炎菌 (Legionella pneumophila) のような細胞内成長に不可欠な病原体の毒性因子を明らかにします.

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Digital PCR-based Competitive Index for High-throughput Analysis of Fitness in Salmonella
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A Deep-sequencing-assisted, Spontaneous Suppressor Screen in the Fission Yeast Schizosaccharomyces pombe
07:55

A Deep-sequencing-assisted, Spontaneous Suppressor Screen in the Fission Yeast Schizosaccharomyces pombe

Published on: March 7, 2019

関連する実験動画

Last Updated: May 16, 2026

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
14:06

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

Published on: November 12, 2012

Digital PCR-based Competitive Index for High-throughput Analysis of Fitness in Salmonella
07:11

Digital PCR-based Competitive Index for High-throughput Analysis of Fitness in Salmonella

Published on: May 13, 2019

A Deep-sequencing-assisted, Spontaneous Suppressor Screen in the Fission Yeast Schizosaccharomyces pombe
07:55

A Deep-sequencing-assisted, Spontaneous Suppressor Screen in the Fission Yeast Schizosaccharomyces pombe

Published on: March 7, 2019

科学分野:

  • 微生物学 微生物学とは
  • 遺伝学 遺伝学とは
  • 分子生物学は分子生物学である.

背景:

  • ホストと病原体の相互作用は複雑で,両方の生物体において複雑な分子機構が関与しています.
  • 病原体はしばしば複数の毒性の戦略を採用し,病気を誘発する重要な要因の識別を複雑にします.

研究 の 目的:

  • 宿主-病原菌の分子相互作用を解剖するための体系的な遺伝子スクリーニング戦略を開発する.
  • 細胞内成長と病原性において重要なレジオネラ肺炎菌によって分泌されるタンパク質を特定する.

主な方法:

  • バクテリアの突然変異とRNAの干渉を組み合わせた方法である挿入型変異変異と枯渇 (iMAD) を開発し,適用しました.
  • レジオネラ肺炎菌の細胞内複製に不可欠な分泌タンパク質のネットワークを体系的に分析した.

主要な成果:

  • 細胞内成長に不可欠なレジオネラ肺炎菌によって分泌されるタンパク質のネットワークを成功裏に解消しました.
  • ホスト-病原体インターフェイスで複雑な分子相互作用を解剖するiMADの有効性を実証しました.

結論:

  • iMAD戦略は,宿主-病原体相互作用を体系的に分析するための強力なツールを提供します.
  • 病原体が分泌するタンパク質を理解することは,毒性の決定因子を特定し,標的を絞った介入の開発の鍵です.