プロテオリスティックに安定したチオペプチドのデノボ発見のためのコンパクトな再プログラムされた遺伝子コード
Alexander A Vinogradov1, Yue Zhang1, Keisuke Hamada2
1Department of Chemistry, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|March 16, 2024
まとめ
この研究は,代謝的に安定したチオペプチドを発見するための再プログラムされたmRNA表示プラットフォームを導入します. この新しい方法は非タンパク質性アミノ酸を用いており,薬剤発見の可能性を高めています.
科学分野:
- 生物化学
- 自然製品 化学
- 薬物の発見
背景:
- チオペプチドは 生物工学の可能性のある 複雑な天然産物です
- 既存のチオペプチド発見プラットフォームは,タンパク質原性アミノ酸の使用により代謝的に不安定な化合物を生成します.
研究 の 目的:
- 代謝的に安定したチオペプチドを発見するためのチオペプチド/mRNA表示プラットフォームを再開発する.
- 安定性を高めるため,非タンパク質性アミノ酸をチオペプチド構造に組み込む.
主な方法:
- mRNAディスプレイライブラリで再プログラムされたコンパクトな遺伝子コードを使用した.
- トラフ2とNCK相互作用キナーゼ (TNIK) に対する親和性選択を行った.
- 決定されたチオペプチド afinity (K_D) とキナーゼ抑制活性 (IC_50).
主要な成果:
- 発見されたチオペプチドは,主に非タンパク質性構造要素で構成されています.
- 特定されたTNIKに対する高親和結合物質 (ベストK_D=2.1 nM) とキナーゼ抑制活性 (ベストIC_50=0. 15 μM).
- ヒトの血清では高代謝安定性 (半減期は99時間まで) を達成し,最大15の非タンパク質性アミノ酸を含んでいる.
結論:
- 再プログラムされたプラットフォームは,代謝安定性が著しく改善されたチオペプチドの発見を可能にします.
- 非タンパク質生成のブロックは標的の結合とユニークな折り畳み形状を容易にする.
- この進歩は 安定した治療薬候補を必要とする 早期の薬剤発見アプリケーションにとって 極めて重要です
関連する概念動画
From DNA to Protein
18.3K
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
18.3K
Proteins: From Genes to Degradation
12.2K
Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick. Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation.
Transcription is the synthesis of RNA...
Transcription is the synthesis of RNA...
12.2K
Conservative Site-specific Recombination and Phase Variation
6.0K
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...
The recognition sites for Cre recombinase called LoxP...
6.0K
Protein Folding
8.0K
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
8.0K
tRNA Activation
19.2K
Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
19.2K
The Central Dogma
125.5K
Overview
125.5K


