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Related Concept Videos

Antibiotic Selection00:57

Antibiotic Selection

Overview
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

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...
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Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic and are commonly found near the...
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Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

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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Updated: May 31, 2026

Genome-Wide CRISPR Screen for Unveiling Radiosensitive and Radioresistant Genes
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Genome-Wide CRISPR Screen for Unveiling Radiosensitive and Radioresistant Genes

Published on: May 23, 2025

Predicting Bacterial Radiation Resistance Through Identifying Novel Genomic Features.

Jiayu Liu1,2, Chao Fang1, Boyang Ji3

  • 1College of Food Science and Light Industry, Nanjing Tech University, Nanjing, China.

Environmental Microbiology
|May 30, 2026
PubMed
Summary
This summary is machine-generated.

Highly radiation-resistant bacteria often have smaller genomes and more resistance genes. Machine learning identified key gene signatures, creating a tool to predict bacterial radiation resistance for engineering applications.

Keywords:
Deinococcuscomparative genomicsgenomic featuresradiation resistance

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Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
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Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

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Last Updated: May 31, 2026

Genome-Wide CRISPR Screen for Unveiling Radiosensitive and Radioresistant Genes
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Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
08:03

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

Area of Science:

  • Microbiology
  • Genomics
  • Biotechnology

Background:

  • Bacterial radiation resistance is crucial for biotechnology, medicine, and environmental science.
  • Deinococcus species exhibit remarkable radiation survival due to unique genomic features.
  • Mechanisms of radiation resistance across diverse bacteria are not well understood.

Purpose of the Study:

  • To analyze genomic diversity and functional genes in radiation-resistant bacteria, including Deinococcus.
  • To identify genomic features associated with high radiation resistance.
  • To develop a predictive tool for quantifying bacterial radiation resistance.

Main Methods:

  • Genomic analysis of Deinococcus and other radiation-resistant bacteria.
  • Functional gene repertoire analysis.
  • Integration of machine learning with genomic datasets.

Main Results:

  • Highly resistant bacterial strains generally possess smaller genomes.
  • These strains harbor an increased number of genes associated with radiation resistance.
  • Key resistance-associated gene signatures were identified using machine learning.

Conclusions:

  • Genomic characteristics, such as genome size and specific gene content, are linked to bacterial radiation resistance.
  • A novel predictive tool was developed to assess bacterial radiation resistance.
  • Findings provide insights into the genomic basis of radiation resistance and its applications in microbial engineering.