再構成可能な相互接続DNAナノ構造の合成と機能における最近の進歩

Chun-Hua Lu¹, Alessandro Cecconello¹, Itamar Willner¹

¹The Institute of Chemistry, The Hebrew University of Jerusalem , Jerusalem 91904, Israel.

Journal of the American Chemical Society

|March 29, 2016

まとめ

相互に繋がったDNAナノ構造はダイナミックな構造を提供しますこれらの切り替え可能なDNA構造はナノ粒子の組立と化学的機能の正確な制御を可能にします

科学分野:

DNAナノテクノロジー
超分子化学
ナノ材料

背景:

カテネンとロタキサンを含む相互に絡み合ったDNAナノ構造は新しく機能する材料です
新しいDNAのスイッチとダイナミックな構造の機会を提供しています
これらの構造は化学機能を制御し機能的な荷物を正確に位置づけることができます

研究の目的:

様々な相互接続されたDNAナノ構造の合成と切り替え可能な再構成を提示する.
ナノマテリアルの組織化と制御機能のためのダイナミックな支架としてそれらのアプリケーションを探求する.
将来の展望と課題を議論する

主な方法:

2環,3環,5環,7環のカタネンの合成
pH,金属イオン,燃料/反燃料線,または光子刺激によって誘発される可変再構成.
金ナノ粒子 (Au NP) アセンブリとロジックゲートのための支架として実装.

主要な成果:

多環カタネンとロタキサンの合成が実証されている.
様々な刺激を用いた切り替え可能な再構成を展示しました
光のプラズモニック制御を可能にするAu NPアセンブリのプログラムされた組織のためにこれらの構造を成功裏に利用しました.
論理ゲート操作のためのDNAナノ構造を実装しました.

結論:

相互接続したDNAナノ構造は先進的なナノテクノロジーのための多用途のプラットフォームを提供します.
ダイナミックで切り替え可能な性質は,ナノスケールの組織と機能の正確な制御を可能にします.
センシング,触媒,分子コンピューティングの応用には大きな可能性が存在します.

さらに関連する動画

09:26

DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation

Published on: December 29, 2021

4.9K

07:50

Plasmid-derived DNA Strand Displacement Gates for Implementing Chemical Reaction Networks

Published on: November 25, 2015

15.0K

関連する概念動画

02:53

Conservative Site-specific Recombination and Phase Variation

7.3K

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...

7.3K

01:14

Introduction to Nuclear Reprogramming

2.4K

Nuclear reprogramming is the process of switching gene expression of one cell type to that of another cell type, usually from a differentiated cell state to an undifferentiated cell state. Differentiation occurs during processes such as development and morphogenesis, tissue regeneration, and malignancy. Cells can also be artificially induced to reprogram their gene expression by techniques such as nuclear transfer, induced pluripotency, and cell fusion. Such techniques have many applications in...

2.4K

02:31

Homologous Recombination

65.2K

The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...

65.2K

03:01

The Replisome

39.5K

DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...

The Replisome

Restriction Enzymes

Restriction enzymes are bacterial enzymes used to cut DNA in a sequence-specific manner. To cleave DNA, they bind to specific palindromic sequences called restriction sites. Such palindromic DNA sequences or inverted repeats are commonly found in regions of functional significance, such as the origin of replication, gene operator sites, and regions containing transcription termination signals.
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...