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関連する概念動画

The Evidence for Evolution02:55

The Evidence for Evolution

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Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
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Convergent Evolution01:54

Convergent Evolution

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Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
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Eukaryotic Evolution01:24

Eukaryotic Evolution

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The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
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Synteny and Evolution02:31

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John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
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Adaptive Mechanisms in Cancer Cells02:53

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Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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人間 の 細胞 の 進化 を 制御 する 適応 できる 基盤

Chet M Berman, Louis J Papa, Samuel J Hendel

  • 1Department of Cell and Chemical Biology , Leiden University Medical Center , 2300 RC Leiden , The Netherlands.

Journal of the American Chemical Society
|November 15, 2018
PubMed
まとめ
この要約は機械生成です。

科学者たちは,ヒトの細胞における興味のある生物分子 (BOI) の方向化された進化のための新しいプラットフォームを開発しました. この方法により,研究および治療の用途のための新しいバイオモレキュルの設計が可能になります.

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Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat
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科学分野:

  • 合成生物学
  • 分子生物学
  • バイオテクノロジー

背景:

  • 生物学的研究や病気の治療には メタゾア細胞の機能的なバイオモレキュルを設計することが重要です
  • バイオ分子最適化のための既存の方法は,細胞環境内の範囲と効率の制限に直面しています.

研究 の 目的:

  • 人体細胞内で直接興味のある多様なバイオ分子 (BOI) の指向的な進化のための新しいプラットフォームを開発し,検証する.
  • 研究や治療のための機能や特性を 強化した生物分子の設計を可能にします

主な方法:

  • 大型遺伝子 (7 kb まで) の進化を促進するために,必須遺伝子 (DNAポリメラーゼ,プロテアゼ) が欠けているカスタム設計のアデノウイルス変異体を使用した.
  • 遺伝子組み換えで誤りやすいアデノウイルスポリメラーゼによるトランス補充により高い突然変異率を達成した.
  • 小分子阻害剤によって調節されるプロテアゼ活性を通して,BOI機能とアデノウイルス伝播を結びつける選択システムを実装した.

主要な成果:

  • ヒト細胞内の転写因子変異の成功方向進化を証明した.
  • エンジニアリングされた変種は,小分子阻害剤に対する耐性を獲得しながら,高い機能性を維持した.
  • このプラットフォームは,アデノウイルスのプロテアース発現または活性化に関連した生物分子の進化をサポートします.

結論:

  • 開発されたプラットフォームは,メタゾーン系における多様なバイオ分子を設計するための堅固なシステムを提供します.
  • この技術は研究や治療目的で新しいバイオ分子を作るためのツールキットを大幅に拡張する可能性を秘めています
  • このプラットフォームは,高度な生物学的研究と臨床応用のためのバイオモレキュルの発見と最適化を容易にする.