滚动圆形DNA合成:小型圆形寡核酸作为DNA聚合酶的有效模板
Dongyu Liu1, Sarah L Daubendiek, Martin A Zillman
1Contribution from the Department of Chemistry, University of Rochester, Rochester, New York 14627.
Journal of the American Chemical Society
|September 11, 2010
概括
小圆形DNA模板催化DNA合成,产生长,重复的DNA链. 这种新型的酶法有效地产生了无需复杂步骤的序列定义DNA,为DNA生产提供了新的工具.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 合成生物学 合成生物学
背景情况:
- DNA聚合酶是DNA复制和修复的关键酶.
- 圆形DNA分子在各种生物系统中很常见.
- 长DNA序列的高效酶合成仍然是一个挑战.
研究的目的:
- 为了研究小,单链圆形DNA寡核酸的催化潜力.
- 探索它们作为DNA聚合酶驱动合成的模板的使用.
- 评估合成的DNA产品的效率和特性.
主要方法:
- 使用DNA聚合酶酶与小圆形DNA寡核酸 (26-74核酸) 作为模板.
- 分析了合成的DNA产品的长度和结构.
- 研究了DNA合成反应的过程性和要求.
- 酶性地将多重体DNA产物分裂成更短的寡氧核酸.
主要成果:
- 小圆形DNA模板 (26-74 nt) 通过DNA聚合酶有效地指导DNA合成.
- 产生长,重复的多重体DNA产物 (1000~12,000NT).
- 合成发生了尽管模板曲率和小尺寸,具有高的过程性.
- 该方法产生了多个模板副本,没有热循环或静态度初始化.
结论:
- 小圆形DNA寡核酸可以作为DNA合成的有效催化模板.
- 这种酶方法为产生重复DNA序列提供了一种新,高效的方法.
- 产品的酶分裂使得序列定义的寡氧核酸的生成成为可能.
更多相关视频
07:35Rapid, Enzymatic Methods for Amplification of Minimal, Linear Templates for Protein Prototyping using Cell-Free Systems
Published on: June 14, 2021
07:38DNA Polymerase Activity Assay Using Near-infrared Fluorescent Labeled DNA Visualized by Acrylamide Gel Electrophoresis
Published on: October 6, 2017
相关概念视频
The Replisome
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...
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...
Proofreading
Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore, it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase Enzyme
Errors During Replication are Corrected by the DNA Polymerase Enzyme
Proofreading
Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...
Replication in Eukaryotes
Overview
Replication in Eukaryotes
In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
Replication in Prokaryotes
DNA replication has three main steps: initiation, elongation, and termination. Replication in prokaryotes begins when initiator proteins bind to the single origin of replication (ori) on the cell's circular chromosome. Replication then proceeds around the entire circle of the chromosome in each direction from the two replication forks, resulting in two DNA molecules.
Many Proteins Work Together to Replicate the Chromosome
Replication is coordinated and carried out by a host of specialized...
Many Proteins Work Together to Replicate the Chromosome
Replication is coordinated and carried out by a host of specialized...
