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関連する概念動画

Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
Cooperative Binding of Transcription Regulators02:13

Cooperative Binding of Transcription Regulators

Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
Conserved Binding Sites01:49

Conserved Binding Sites

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 analyses the...
Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...

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関連する実験動画

Updated: Jun 29, 2026

DNAzyme 10-23 - Based Nanomachines for Nucleic Acid Recognition
07:16

DNAzyme 10-23 - Based Nanomachines for Nucleic Acid Recognition

Published on: February 9, 2024

反応性のあるタンパク質結合能力を持つDNA小分子キメラである.

D Calvin Harris1, Xiaozhu Chu, Janarthanan Jayawickramarajah

  • 1Department of Chemistry, Tulane University, 2015 Percival Stern Hall, New Orleans, Louisiana 70118, USA.

Journal of the American Chemical Society
|October 16, 2008
PubMed
まとめ

研究者らは,タンパク質結合を調節する新しいDNA小分子キメラ (DC) を開発した. この薬剤は2つの構造を切り替えることができ,トリプシンなどのタンパク質を結合する能力を大幅に高めます.

科学分野:

  • 化学生物学 化学生物学とは
  • 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:

  • 調節可能なタンパク質結合能力を有する薬剤の開発は,分子診断と治療において極めて重要です.
  • 既存の方法では,結合親和性と特異性に対する正確な制御が欠けていることが多い.

研究 の 目的:

  • 制御可能なタンパク質結合能力を有する剤を作成するための一般化可能な戦略を提示する.
  • 切り替え可能な二次構造と結合特性を備えた新しいDNA小分子キメラ (DC) を導入する.

主な方法:

  • 2つのタンパク質結合アームとオリゴヌクレオチド (ODN) コアを持つDNA小分子キメラ (DC 1) の設計と合成.
  • 外部ODN刺激を用いて,バイデントの分子内四重複とモノデントの二重複の形態の間の構造的移行を誘導する.
  • 分離定数 (Kd) の測定を用いたタンパク質結合親和性の定量化.

主要な成果:

  • DC 1はODNの刺激に反応して,切り替え可能な二次構造 (四重複および二重複) を示した.
  • 二重体四重体形は,二重体形と比較してトリプシン結合能力が20倍向上した.
  • 0.8マイクロMの解離定数 (Kd) が,二重体形状のトリプシン結合で達成されました.

さらに関連する動画

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library
10:17

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library

Published on: January 14, 2020

Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC (Crosslinking of Small Molecules to Isolate Chromatin)
10:05

Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC (Crosslinking of Small Molecules to Isolate Chromatin)

Published on: January 20, 2016

関連する実験動画

Last Updated: Jun 29, 2026

DNAzyme 10-23 - Based Nanomachines for Nucleic Acid Recognition
07:16

DNAzyme 10-23 - Based Nanomachines for Nucleic Acid Recognition

Published on: February 9, 2024

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library
10:17

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library

Published on: January 14, 2020

Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC (Crosslinking of Small Molecules to Isolate Chromatin)
10:05

Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC (Crosslinking of Small Molecules to Isolate Chromatin)

Published on: January 20, 2016

結論:

  • 開発されたDNA小分子キメラ戦略は,調節可能な親和性を持つタンパク質結合剤を作成するための汎用的なプラットフォームを提供します.
  • このアプローチは,エージェントの二次構造を調節することによって,タンパク質の相互作用を正確に制御することができます.
  • この発見は,標的型療法と診断ツールの設計に意味を持ちます.