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相关概念视频

Genome Annotation and Assembly03:36

Genome Annotation and Assembly

19.3K
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.
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Next-generation Sequencing03:00

Next-generation Sequencing

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The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
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Genomic DNA in Eukaryotes00:58

Genomic DNA in Eukaryotes

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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.
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Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

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Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
145
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

6.2K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
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相关实验视频

Updated: Sep 14, 2025

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information
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Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

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一份总部位于阿联的阿拉伯泛氏名参考草案.

Nasna Nassir1,2, Mohamed A Almarri2,3, Muhammad Kumail1

  • 1Center for Applied and Translational Genomics (CATG), Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai Health, Dubai, UAE.

Nature communications
|July 24, 2025
PubMed
概括
此摘要是机器生成的。

这项研究介绍了阿拉伯泛基因组参考 (UPR),这是了解人类遗传多样性的重要资源. 它揭示了阿拉伯人口中的新奇序列和特定种群变异,增强了基因组医学.

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High-throughput Physical Mapping of Chromosomes using Automated in situ Hybridization
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High-throughput Physical Mapping of Chromosomes using Automated in situ Hybridization

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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
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相关实验视频

Last Updated: Sep 14, 2025

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information
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Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

Published on: August 15, 2019

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High-throughput Physical Mapping of Chromosomes using Automated in situ Hybridization
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High-throughput Physical Mapping of Chromosomes using Automated in situ Hybridization

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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease

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科学领域:

  • 基因组学就是基因组学.
  • 人口遗传学 人口遗传学

背景情况:

  • 人类泛基因组缺乏阿拉伯人口的代表性,限制了对遗传多样性的理解.
  • 现有的参考基因组不能完全捕捉到不同种族群体的遗传景观.

研究的目的:

  • 建立一个基于阿联的初步阿拉伯泛氏名参考 (UPR).
  • 在阿拉伯人口中描述新的遗传序列和变异.
  • 为了改善基因组医学和研究,为代表性不足的群体.

主要方法:

  • 使用高保真度,超长度和Hi-C读数组装核和线粒体泛基体.
  • 高质量的哈普洛型分期de novo组装,平均N50为124.28 Mb.
  • 与现有的人类泛基因组和公共数据集进行比较分析.

主要成果:

  • 发现了111.96万个基对的新奇的圣色序列.
  • 鉴定了89.4万个特定于种群的小变异和235,195个结构变异.
  • 检测了883个基因重复,包括TAF11L5的独特重复,影响与衰退性疾病相关的基因.
  • 发现了1436个之前未报告的线粒体序列.

结论:

  • 全球基因复查是阿拉伯人口遗传学和基因组医学的一个重要资源.
  • 这项研究突出了以前人类参考文献中缺少的大量新型遗传多样性.
  • 这些发现为更具包容性和准确的基因组研究铺平了道路.