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相关概念视频

Mutations in Microorganisms01:18

Mutations in Microorganisms

887
Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
887
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

775
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...
775
Mutations01:35

Mutations

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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
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Mutations01:39

Mutations

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Overview
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Viral Mutations00:36

Viral Mutations

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A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
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Spontaneous and Induced Mutations01:30

Spontaneous and Induced Mutations

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Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).
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相关实验视频

Updated: Mar 2, 2026

Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli
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Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli

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CliPME:临床病原性细菌突变和表达数据库.

Hongxiang Xu1, Yu Huang1, Mingjun Zhang2

  • 1Institute of Modern Biopharmaceuticals, School of Life Sciences, Southwest University, Chongqing 400715, China.

Journal of genetics and genomics = Yi chuan xue bao
|February 28, 2026
PubMed
概括

研究人员开发了CliPME,这是一个分析细菌突变及其影响的平台. 它有助于理解微生物进化,并开发新的抗微生物策略来对抗诸如Mycobacterium tuberculosis等病原体.

关键词:
临床细菌 临床细菌数据库数据库数据库是一个数据库.表达方式表达方式表达突变突变是一种突变.qMut 包装 包装 包装

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Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
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Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

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科学领域:

  • 细菌基因组学是一种细菌基因组学.
  • 微生物进化过程中的微生物.
  • 生物信息学是一种生物信息学.

背景情况:

  • 病原细菌由于人类的相互作用而迅速发展.
  • 全基因组测序 (WGS) 有助于突变跟踪,但分析细菌突变模式和功能影响的工具有限.
  • 现有的生物信息学工具缺乏针对病原细菌的综合解决方案.

研究的目的:

  • 介绍CliPME,一个细菌基因组学综合平台.
  • 结合突变检测,效果预测和对病原细菌的监管网络分析.
  • 为解码细菌病原体进化提供资源,并为抗微生物战略提供信息.

主要方法:

  • 开发CliPME,一个集成突变检测,效应预测和监管网络分析的平台.
  • 创建了qMut,这是一个用于大规模突变分析的R包.
  • 功能模块的实施:MutFinder,MutAnalyzer和ExpMiner用于人口层面的分析,功能预测和基因表达关系.
  • 使用Mycobacterium结核病 (Mtb) 的案例研究.

主要成果:

  • 通过CliPME成功地确定了Mtb转录因子Rv0324.4中的功能性显著突变.
  • 实验验证表明Rv0324遗传变异与潜在的适应性表型之间存在联系.
  • 该平台集成了种群级突变分析,功能预测和基因表达见解.

结论:

  • CliPME为分析细菌基因组突变及其功能后果提供了全面的解决方案.
  • 该平台有助于理解细菌病原体的进化机制.
  • 通过翻译基因组见解,CliPME可以加快新型抗菌战略的开发.