在端粒到端粒时代的基因组组装
Heng Li1,2, Richard Durbin3
1Department of Data Science, Dana-Farber Cancer Institute, Boston, MA, USA.
ArXiv
|August 30, 2023
概括
长读测序技术的近期进步使近乎完整的染色体层次基因组组装成为可能. 本综述涵盖了端粒到端粒组装的新算法和协议以及未来的方向.
科学领域:
- 生物信息学和基因组学
- 分子生物学分子生物学
背景情况:
- 新组装从测序阅读中重建生物体基因组,这是几十年来生物信息学面临的挑战.
- 从历史上看,基因组组装产生了碎片化的结果,限制了生物学见解.
研究的目的:
- 审查新组装算法和协议的最新进展.
- 专注于实现端粒到端粒基因组组合的方法.
- 讨论基因组组装的未来方向.
主要方法:
- 关于基因组组装算法的最新文献的综述.
- 分析协议,使长读序列为染色体层次组装.
- 综合生物信息学组装当前趋势和未来前景.
主要成果:
- 长读序列的技术进步是接近完整基因组组件的关键.
- 当前的算法和协议越来越能够实现端粒对端粒的组装.
- 该领域正在向常规,高度连续的基因组重建取得进展.
结论:
- 端粒对端粒组装代表了基因组研究能力的重大飞跃.
- 预计未来的发展将进一步完善组装协议并扩展应用.
更多相关视频
12:08Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies
Published on: August 20, 2021
5.1K
11:29Modified Terminal Restriction Fragment Analysis for Quantifying Telomere Length Using In-gel Hybridization
Published on: July 10, 2017
12.9K
相关概念视频
Telomeres and Telomerase
23.5K
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded...
23.5K
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
Replication in Eukaryotes
13.9K
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...
13.9K
Spindle Assembly
3.7K
Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
3.7K
Chromosome Replication
8.8K
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin...
8.8K
Histone Variants at the Centromere
4.4K
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
4.4K
