散布性ゲートとカスケード型DNAネットワーク
Zhixin Zhou1, Yu Ouyang1, Jianbang Wang1
1The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Journal of the American Chemical Society
|March 23, 2021
まとめ
この研究は,制御された分子組立のために酵素駆動燃料サイクルを使用する新しい核酸ベースの分散ネットワークを提示します. これらのネットワークは 調節可能で ゲート付きの操作と カスケーディングの振る舞いを示し 複雑な分子機械への道を切り開きます
科学分野:
- 超分子化学
- 化学運動学
- 分子工学
背景:
- 複雑な分子機能には不可欠です
- 核酸ナノテクノロジーは 分子組み立ての正確な制御を提供します.
- 酵素媒介反応は ダイナミックな分子プロセスを駆動する.
研究 の 目的:
- 核酸ベースの分散ネットワークの設計と特徴付け
- 燃料で起動し ゲートで操作し カスケードで動作する
- これらのネットワーク内の相互通信とフィードバックメカニズムを調査する.
主な方法:
- 核酸燃料とニッキング酵素 Nt.BbvCIを駆動するために使った.
- 超分子中間物質のモニタリングのために,フローロフォールラベル付きの糸とフォースター共振エネルギー転送 (FRET) を使用した.
- 選択的なゲート操作のための組み込み阻害剤とキャスケディングのための研究されたストランド転送/フィードバック.
主要な成果:
- 核酸燃料で活性化された機能モジュールを成功裏に構築し,一時的な超分子中間物質を形成しました.
- 阻害剤 (I1またはI2) を使用した選択的,ゲートされた消散作用が実証されています.
- ストリーム転送とフィードバックで2つの消散ネットワーク間の相互通信とカスケーディングを達成した.
結論:
- 核酸分散ネットワークは,複雑なダイナミックな行動のために正確に制御され,プログラムすることができます.
- 開発されたシステムは,運動モデルとシミュレーションによって予測可能な調整可能な一時的なパターンを示しています.
- この研究は 精巧な酵素駆動分子機械と 反応性のある材料を 構築するための基盤を提供します
関連する概念動画
01:25Neural Circuits
2.1K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
2.1K
01:22Amplifying Signals via Enzymatic Cascade
15.0K
When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
15.0K
01:24Intracellular Signaling Cascades
50.1K
Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
50.1K
01:25Rab Cascades
3.1K
Rab GTPases act in a regulated cascade during membrane fusion, helping the lipid bilayers mix. The Rab family of proteins are active when bound to GTP, and inactive when bound to GDP. Hence, they act as guanine nucleotide-dependent molecular switches. Rab-GTP recognizes and binds to long or short-range tethering proteins to capture the target vesicle. These tethers coordinate with SNAREs on the vesicle and the target membrane to assemble the trans SNARE complex that locks the mixing bilayers.
3.1K
02:57DNA-only Transposons
15.5K
DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
The donor site from where the transposon is excised is either degraded or...
The donor site from where the transposon is excised is either degraded or...
15.5K
01:26DNA Bacteriophages
368
Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...
368