相关实验视频
Updated: May 11, 2025

09:40
Novel Sequence Discovery by Subtractive Genomics
Published on: January 25, 2019
8.5K
对Chaetoceros物种线粒体基因组进行比较分析
Zongmei Cui1,2,3, Qing Xu4, Feng Liu1,2,3
1CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.
Journal of phycology
|April 18, 2025
概括
研究人员从海洋藻 (Chaetoceros) 中测序了12个线粒体基因组. 这项工作提供了一种新的DNA条形码,用于识别这些生态重要且有时有害的藻类.
科学领域:
- 海洋生物学 海洋生物学
- 基因组学就是基因组学.
- 生理学生理学是指生理学
背景情况:
- 藻属Chaetoceros在沿海水域具有生态意义.
- 众所周知,一些Chaetoceros物种会导致有害的藻类繁殖,影响水产养殖.
- 由于生态和经济原因,了解Chaetoceros的遗传多样性至关重要.
研究的目的:
- 为12个Chaetoceros物种构建全长线粒体基因组 (mtDNA).
- 在mtDNA中识别可变区域,以开发特定的遗传标记.
- 为藻的遗传学和进化研究提供资源.
主要方法:
- 12种Chaetoceros物种 (8种已知,4种尚未描述) 的全基因组测序.
- 对mtDNA大小和结构的比较分析.
- 识别用于初级设计的超变区域.
主要成果:
- 成功对12个完整的ChaetocerosmtDNA进行了测序,范围从34,174到39,411bp.
- 观察到与离散超变区的广泛的合成保护.
- 根据这些可变区域设计了一种特定物种的原料,chaetomt1.
结论:
- 测序的mtDNAs作为一个有价值的"超级条形码"用于Chaetoceros的基因组.
- chaetomt1初始化器有助于对Chaetoceros物种进行准确的识别.
- 这种基因组资源有助于藻的功能和进化研究.
相关概念视频
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
11.9K
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
Evolutionary Relationships through Genome Comparisons
5.6K
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...
5.6K
Export of Mitochondrial and Chloroplast Genes
3.6K
A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
3.6K
Animal Mitochondrial Genetics
7.4K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
7.4K
The Inner Mitochondrial Membrane
3.1K
The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria. In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
3.1K
Chemiosmosis
96.2K
Oxidative phosphorylation is a highly efficient process that generates large amounts of adenosine triphosphate (ATP), the basic unit of energy that drives many cellular processes. Oxidative phosphorylation involves two processes— the electron transport chain and chemiosmosis.
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
96.2K

