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関連する概念動画

DNA as a Genetic Template02:05

DNA as a Genetic Template

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Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
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DNA as a Genetic Template02:05

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DNA Base Pairing02:27

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Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
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Conserved Binding Sites

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
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The DNA Helix01:07

The DNA Helix

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Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...
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Updated: Apr 12, 2026

Stable DNA Motifs, 1D and 2D Nanostructures Constructed from Small Circular DNA Molecules
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機能的な6核酸DNAの進化

Liqin Zhang1, Zunyi Yang2, Kwame Sefah1

  • 1†Department of Chemistry, Department of Physiology and Functional Genomics, UF Health Cancer Center, UF Genetics Institute, University of Florida, Gainesville, Florida 32611, United States.

Journal of the American Chemical Society
|May 13, 2015
PubMed
まとめ

合成生物学者はDNAを拡張したDNAを拡張した.

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科学分野:

  • 合成生物学 合成生物学とは
  • 分子生物学は分子生物学である.
  • バイオケミストリー バイオケミストリー

背景:

  • 標準DNAは4つの核酸 (GACT) を使用し,情報密度と機能能力を制限する.
  • 合成生物学は,遺伝子アルファベットを拡張し,分子性能を向上させることを目的としています.
  • ワトソン・クリックのペアリング幾何学は,DNA構造と複製の基本的な原理である.

研究 の 目的:

  • 2つの新しいヌクレオチド,ZとPをDNAに組み込む有用性を調査する.
  • GACTZPライブラリが,がん細胞に選択的に結合する分子を進化させる能力を評価する.
  • 拡張遺伝子システムの配列空間と機能的可能性を探求する.

主な方法:

  • 合成ヌクレオチドZとPを,実験室での in vitro 進化 (LIVE) のための DNA ライブラリに含める.
  • 選択圧力により,選択的に肝臓がん細胞と結合するオリゴヌクレオチドが進化する.
  • 復元された結合種を分析して,Z核酸とP核酸を含む配列を特定する.

主要な成果:

  • 選択的結合能力を持つ12種類以上のDNA種が,GACTZPライブラリから回収されました.
  • 最も効果的な結合剤は,Zおよび/またはP核酸を含有しており,しばしば複数の隣接した位置に存在しています.
  • 弱い結合剤にはZとPが欠け,これらの新しい核酸が結合機能を強化することを示唆しています.

結論:

  • GACTZPライブラリは,DNAのアクセシブルな配列空間と機能的レパートリーを大幅に拡張します.
  • 合成ヌクレオチドZとPは,オリゴヌクレオチドが特定の分子機能を進化させる能力を高めます.
  • 拡張された遺伝子システムは,標準的なDNAライブラリと比較して,より豊かな機能の貯蔵庫を提供します.