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相关概念视频

Nucleic Acid Structure01:25

Nucleic Acid Structure

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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
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The Replisome03:01

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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...
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Lagging Strand Synthesis01:59

Lagging Strand Synthesis

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During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
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DNA replication involves the separation of the two strands of the double helix, with each strand serving as a template from which the new complementary strand is copied.  After replication, each double-stranded DNA includes one parental or “old” strand and one “new” strand. This is known as semiconservative replication. The resulting DNA molecules have the same sequence and are divided equally into the two daughter cells.
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The DNA Replication Fork01:02

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An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork.   Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication...
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Updated: Sep 9, 2025

DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation
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高排序的DNA框架接口可实现高效的酶性寡核酸合成

Kunjie Li1, Dongbao Tang2, Xiaoyun Lu3

  • 1The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
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概括
此摘要是机器生成的。

研究人员开发了一种3DDNA框架,以改善酶性寡核酸合成 (EOS). 这种纳米界面可以提高酶的可访问性和DNA合成效率,从而实现精确的DNA信息存储.

关键词:
如何存储DNA信息DNA合成效率合成生物学四面体DNA纳米结构

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科学领域:

  • 生物技术
  • 分子生物学
  • 纳米技术

背景情况:

  • 在生命科学中,新型DNA合成至关重要.
  • 酶性寡核酸合成 (EOS) 与化学方法相比,具有成本效益和环境友好等优势.
  • 目前的EOS方法面临挑战,因为原料的可访问性有限和酶的阻碍.

研究的目的:

  • 为高效的酶性寡核酸合成开发纳米界面.
  • 克服EOS中的原料可访问性和酶空间障碍的限制.
  • 为了提高DNA合成产量和准确性,

主要方法:

  • 使用四面体DNA纳米结构 (TDN) 作为3DDNA框架.
  • 设计了一个纳米界面, 提供DNA原始物的有序定位和间距.
  • 研究了TDN支架对酶基质亲和力和反应动力学的影响.

主要成果:

  • 与单链结构相比,TDN支架显著提高了酶的可访问性和催化效率.
  • 基于TDN的EOS减少了删除错误,并在合成模式DNA序列时增加了产量.
  • 成功合成了60个核酸DNA片段,具有96.82%的阶段性产量,能够准确地检索15个字节的文本信息.

结论:

  • 开发的基于TDN的纳米接口可实现高效和精确的酶性寡核酸合成.
  • 这种方法为推进DNA合成技术提供了坚实的基础.
  • 应用包括改进DNA信息存储和增强遗传研究能力.