大肠杆菌基因组段的连续合成和Mb规模的人类DNA组装
Jérôme F Zürcher1, Askar A Kleefeldt1, Louise F H Funke1,2
1Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.
Nature
|June 28, 2023
概括
研究人员开发了大规模DNA组合和基因组合成的新方法. 这些技术可以快速构建复杂的DNA序列,为合成基因组的创建铺平了道路.
科学领域:
- 合成生物学
- 基因组学
- 分子生物学
背景情况:
- 全基因组合成对于理解和设计生物的功能至关重要.
- 目前大规模基因组构造的方法需要高效的DNA组装和替代策略.
研究的目的:
- 开发用于大基量DNA组装和连续基因组合成的新方法.
- 展示合成基因组快速可扩展的可行性.
主要方法:
- 细菌人造染色体 (BAC) 逐步插入合成 (BASIS) 用于大基基规模的DNA组装.
- 连续基因组合成 (CGS) 用于用合成DNA连续替换基因组DNA,尽量减少交叉.
主要成果:
- BASIS成功组装了1.1 Mb复杂的人类DNA,包括编码和非编码区域.
- 在10天内,CGS使用5个插件合成了大肠杆菌基因组的0.5 Mb.
- 开发的方法可扩展,并可用于全基因组合成.
结论:
- BASIS和CGS是构建各种生物体合成基因组的强大平台.
- 这些进步极大地加速了合成基因组的构建过程.
- 这些方法有望在几个月内完成细菌基因组的合成.
相关概念视频
Genome Annotation and Assembly
18.9K
The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
18.9K
Genomics
36.5K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
36.5K
Genomic DNA in Eukaryotes
47.1K
Eukaryotes have large genomes compared to prokaryotes. To fit their genomes into a cell, eukaryotic DNA is packaged extraordinarily tightly inside the nucleus. To achieve this, DNA is tightly wound around proteins called histones, which are packaged into nucleosomes that are joined by linker DNA and coil into chromatin fibers. Additional fibrous proteins further compact the chromatin, which is recognizable as chromosomes during certain phases of cell division.
47.1K
Synthetic Biology
4.9K
Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
Golden rice
Golden rice is a genetically modified...
Golden rice
Golden rice is a genetically modified...
4.9K
DNA Packaging
102.7K
Overview
102.7K
DNA Replication
49.9K
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.
Replication in Prokaryotes
DNA replication...
Replication in Prokaryotes
DNA replication...
49.9K


