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Gene Conversion02:08

Gene Conversion

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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...
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Conservative Site-specific Recombination and Phase Variation02:53

Conservative Site-specific Recombination and Phase Variation

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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...
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The Central Dogma01:20

The Central Dogma

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The central dogma explains the flow of genetic information from DNA nucleotides to the amino acid sequence of proteins.
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
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Restriction Enzymes01:11

Restriction Enzymes

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Restriction enzymes are bacterial enzymes used to cut DNA in a sequence-specific manner. To cleave DNA, they bind to specific palindromic sequences called restriction sites. Such palindromic DNA sequences or inverted repeats are commonly found in regions of functional significance, such as the origin of replication, gene operator sites, and regions containing transcription termination signals.
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
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Exon Recombination02:32

Exon Recombination

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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
Exon shuffling follows “splice frame rules.” Each exon...
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Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

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

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リファクタリングされた遺伝子コードは,双方向的な遺伝子分離を可能にします.

Jérôme F Zürcher1, Wesley E Robertson1, Tomás Kappes2

  • 1Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.

Science (New York, N.Y.)
|October 20, 2022
PubMed
まとめ
この要約は機械生成です。

研究者は人工DNAの拡散を防ぐため,Escherichia coliで合成遺伝子コードを設計しました. ウイルスのような 移動性遺伝子要素に対する バイオセキュリティを強化します

さらに関連する動画

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis
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Genetic Modification of Cyanobacteria by Conjugation Using the CyanoGate Modular Cloning Toolkit
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Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis
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Genetic Modification of Cyanobacteria by Conjugation Using the CyanoGate Modular Cloning Toolkit
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科学分野:

  • 合成生物学
  • 遺伝学
  • 分子生物学

背景:

  • 遺伝子コードは ほぼ普遍的で DNAのコードから タンパク質の合成を指示します
  • 合成遺伝子情報の封じ込めを確保することは,生物の安全性にとって極めて重要です.

研究 の 目的:

  • エシェリキア・コライの遺伝子コード構造を再構成する
  • オートゴーナルな遺伝子コードと 横の遺伝子転送システムを作る
  • 移動性遺伝子要素による 合成生物の侵入を阻止する

主な方法:

  • エシェリキア・コライの遺伝子コード構造を再構成する.
  • オートゴーナルと相互にオートゴーナルな水平遺伝子転送システムを開発する.
  • ウイルスを含む移動性遺伝子要素に対する再構成コードの有効性をテストする.

主要な成果:

  • エシェリキア・コリ菌で 正対の遺伝子コードを 作成しました
  • 設計された遺伝子コードに特有の水平遺伝子転送システムです.
  • リファクタリングされたコードを持つ合成生物で ウイルスを含む移動性遺伝子要素の侵入を完全に遮断することが示されています.

結論:

  • リファクタリングされた遺伝子コードは 合成遺伝情報を保持する 強力なメカニズムを提供します
  • オートゴーナル遺伝子転送システムは 遺伝子交換の特異性を高めます
  • 人工的な遺伝子コードは 生物の安全性や 合成生物から自然生物への横断的な遺伝子転送を 防ぐ強力な戦略を提供します