キラルケイジ分子はテロメラーゼの活動を抑制する
Ken-ichi Shinohara1, Yuta Sannohe, Shuji Kaieda
1Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku Kyoto 606-8502, Japan.
Journal of the American Chemical Society
|March 3, 2010
まとめ
研究者らは,G-四重複のDNA構造を認識できるキラルサイクルヘリケーンを発見した. この化合物は強力なテロメラーゼ阻害を示し,テロメアを標的とする新しい戦略を提供します.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 薬用化学 薬用化学について
背景:
- ワトソン・クリックのダブルヘリックスを超えた二次DNA構造は,生物学的プロセスにおいて極めて重要です.
- 染色体末端にあるG四重複体は,テロメアへのアクセスを遮断することでテロメラーゼの活性を抑制する.
- これらの構造は,新しいDNA相互作用療法化合物の標的として浮上しています.
研究 の 目的:
- キラルサイクリックヘリケーンによる四重複DNAのエナンチオセレクティブ認識の最初の事例を報告する.
- テロメラーゼ阻害剤としてのサイクルヘリケンの可能性を調査する.
主な方法:
- キラルサイクルヘリケンの合成と特徴付け (M1).
- M1のテロメアヒトG四重複DNAとの相互作用の調査.
- テロメラーゼに対するM1の抑制作用の測定.
主要な成果:
- サイクルヘリケーンM1は,四重複DNAのエナチオセレクティブ認識を示した.
- 2つのテロメアのヒトG-四重複素の間の新しいリガンド結合裂けが特定され,TTAリンクヤーで結びつけられました.
- 化合物M1はテロメラーゼ活性に対する強力な阻害を示した.
結論:
- チラルのサイクリックヘリケンは,G四重複DNAを標的にできる新しい種類の分子を表しています.
- 特定された結合部位と強力な阻害活性により,M1はテロメアを標的とする治療法の有望な候補者であると示唆されています.
- この研究は,G-クアドルプレックスと相互作用する薬剤を開発するための新しい道を開きます.
関連する概念動画
02:41Telomeres and Telomerase
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
02:41Telomeres and Telomerase
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
02:34Inhibition of CDK Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
02:34Inhibition of Cdk Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
01:52Eukaryotic Transcription Inhibitors
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
02:25Chirality
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...