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相关概念视频

Genomic DNA in Eukaryotes00:58

Genomic DNA in Eukaryotes

46.5K
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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Ribosome Profiling02:24

Ribosome Profiling

3.4K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
3.4K
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes02:16

Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes

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The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
11.9K
Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

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The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
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Eukaryotic Compartmentalization01:37

Eukaryotic Compartmentalization

10.3K
One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
For example, lysosomes in the animal...
10.3K
Eukaryotic Evolution01:24

Eukaryotic Evolution

29.5K
The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
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相关实验视频

Updated: May 9, 2025

Exploring the Root Microbiome: Extracting Bacterial Community Data from the Soil, Rhizosphere, and Root Endosphere
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EukFunc:一个整体的真核生物功能参考,用于土壤真核生物的自动分析.

Guillaume Lentendu1, David Singer2, Sabine Agatha3

  • 1Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland.

Molecular ecology resources
|April 30, 2025
PubMed
概括

一个新的数据库,EukFunc,提供了一种标准化的方式,以功能性地分类土壤真核生物,包括真菌,线虫和原生虫. 该工具增强了对土壤生物多样性和生态系统功能的生态洞察力.

关键词:
功能生态学 功能生态学菌是一种真菌.微型核糖体的存在微生物是一种微生物.线虫 线虫 在线虫 线虫 线虫原始主义者是原始主义者.土壤生物多样性土壤生物多样性

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Nanopore DNA Sequencing for Metagenomic Soil Analysis
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科学领域:

  • 土壤生态学 土壤生态学
  • 微生物生态学 微生物生态学
  • 生物多样性研究的研究.

背景情况:

  • 土壤真核生物驱动关键的生态系统功能,如碳循环和植物健康.
  • 目前的方法缺乏标准化,整体的方法,用于对土壤真核生物的功能分类.
  • 了解土壤真核细胞的功能对于土壤系统管理至关重要.

研究的目的:

  • 开发土壤真核生物的第一个全面的功能参考数据库.
  • 为了使真菌,线虫和原生虫的标准化功能分类.
  • 促进对土壤生物多样性和功能进行更深入的生态洞察.

主要方法:

  • 编制了EukFunc,一个包含14060种土壤真核生物物种的数据库.
  • 根据营养获取方式分类的物种 (例如,共生,萨帕特罗夫,捕食者).
  • 将功能数据集成到一个R包中,用于用户友好的分析和元编码注释.

主要成果:

  • EukFunc将物种分为功能类别:40%的共生类,26%的类,17%的光类,16%的捕食者.
  • 数据库包括详细的营养模式和相互作用 (猎物/共生动物).
  • 对高山草原土壤的分析表明,通过整合整个土壤真菌体,可以提高生态理解.

结论:

  • EukFunc为土壤真核生物的功能注释提供了一个标准化的框架.
  • 该数据库简化了分析,提高了生态研究的效率和准确性.
  • 这种资源对于我们进一步了解土壤生态系统功能和服务至关重要.