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Genomic DNA in Eukaryotes00:58

Genomic DNA in Eukaryotes

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.
Evolution of Microbial Genome01:08

Evolution of Microbial Genome

Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
Genomics02:02

Genomics

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...
Next-generation Sequencing03:00

Next-generation Sequencing

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.
Diversity of Protists I01:15

Diversity of Protists I

Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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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Ascaris suum ゲノム草案について

Aaron R Jex1, Shiping Liu, Bo Li

  • 1Faculty of Veterinary Science, The University of Melbourne, Parkville, Victoria 3010, Australia. ajex@unimelb.edu.au

Nature
|October 28, 2011
PubMed
まとめ
この要約は機械生成です。

一般的な丸虫であるアスカリス・スウム (Ascaris suum) のゲノムの草稿は,宿主組織への侵入と免疫回避のための重要な分子を明らかにしています. このリソースは,アスカリアーシスおよびその他の寄生虫感染に対する新しい治療法の開発に役立ちます.

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Ultralow Input Genome Sequencing Library Preparation from a Single Tardigrade Specimen
10:28

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Published on: July 15, 2018

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03:58

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科学分野:

  • 寄生虫学とは,寄生虫学である.
  • ゲノミクスゲノミクスとは
  • 分子生物学は分子生物学である.

背景:

  • アスカリスのようなジオヘルミントは,世界中で20億人以上の人々を感染させ,かなりの死亡率と病気の負担を引き起こします.
  • アスカリアーシスは,人間の健康,特に子供の健康に悪影響を及ぼし,発達障害や死亡を引き起こし,また豚の生産に大きな損失をもたらします.
  • アスカリス・ブタモデルは,寄生虫感染症を分子レベルで研究する上で極めて重要です.

研究 の 目的:

  • Ascaris suum.のゲノム草案をシーケンス化し,分析する.
  • Ascaris suumのゲノムを他のネマトードゲノムと比較する.
  • 宿主-寄生虫の相互作用と免疫回避に関与する分子を識別する.

主な方法:

  • Ascaris suum.の全ゲノムシーケンシングについて
  • 生物情報分析と他のネマトードゲノムとの比較.
  • 機能性分子を特定するためのセクレトーム分析.

主要な成果:

  • Ascaris suumの273メガベーズのゲノム草案が生成され,約18,500のタンパク質をコードする遺伝子が含まれています.
  • ゲノムは低重複率 (4.4%) を表しています.
  • A. suumのシクレトームは,組織分解のためのペプチダースと,宿主の免疫反応を調節するための分子に富んでいます.

結論:

  • Ascaris suumのゲノムは,寄生病を理解するための貴重なリソースを提供します.
  • このゲノムデータは,アスカリアーシスおよび他の線虫病に対する薬剤,ワクチン,診断を含む新しい介入の開発を容易にするでしょう.