通过合成后胺凝结制备的氨基酸侧链的DNA三向结结构
Yusuke Takezawa1, Naofumi Kudo1, Nobuyuki Fuse1
1Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo, Japan.
Nucleosides, nucleotides & nucleic acids
|February 15, 2024
概括
研究人员用氨基酸侧链合成了DNA三向结 (3WJ) 结构. 这些修改后的3WJs展示了一个稳定的平台,用于精确地安排DNA纳米结构中的氨基酸.
科学领域:
- 生物化学 生物化学
- 合成生物学 合成生物学
- DNA DNA 纳米技术 纳米技术
背景情况:
- DNA三路结 (3WJs) 是复杂的核酸结构,在纳米技术中具有潜在的应用.
- 精确控制DNA纳米结构内的功能组的空间排列对于开发先进的分子工具至关重要.
研究的目的:
- 为了合成DNA三路结 (3WJ) 结构,将氨基酸侧链纳入其核心.
- 为了研究这些修改后的3WJs的稳定性和实用性,作为氨基酸侧链空间布局的平台.
主要方法:
- 含有2'-aminouridine的DNA寡核酸的合成后修饰.
- 胺凝聚反应与激活以连接胺 (His),氨酸 (Cys) 和酸 (Asp) 侧链.
- 通过DNA杂交,修改3WJs的形成和表征.
主要成果:
- 成功合成了DNA 3WJs与His,Cys和Asp侧链.
- 即使在室温下有三个负电荷的Asp侧链,也证明了3WJ的稳定形成.
- 展示了单独的DNA杂交可以在3WJ核心中放置两个 (His和Asp) 或三个 (His,Cys和Asp) 侧链.
结论:
- DNA三路结作为一个多功能平台,用于氨基酸侧链的空间布局.
- 合成的修改3WJs是稳定的,可以精确地与氨基酸功能化.
- 这项工作为设计具有定制功能的基于DNA的新型纳米材料开辟了道路.
相关概念视频
Structure of Amines
2.5K
The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’...
2.5K
Peptide Bonds
74.4K
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
74.4K
Preparation of Amides
3.0K
Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
3.0K
Protein Organization
137.7K
Overview
137.7K
Protein Folding
118.1K
Overview
118.1K
Preparation of 1° Amines: Gabriel Synthesis
3.6K
Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
3.6K


