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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.
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Related Experiment Videos

From bacterial to microbial ecosystems (metagenomics).

Shannon J Williamson1, Shibu Yooseph

  • 1J. Craig Venter Institute, San Diego, CA, USA. swilliamson@jcvi.org

Methods in Molecular Biology (Clifton, N.J.)
|December 7, 2011
PubMed
Summary

Metagenomics bypasses microbial culturing, revealing microbial diversity and adaptation. This review covers key steps, challenges, and solutions in metagenomic studies for diverse environments.

Area of Science:

  • Microbial Ecology
  • Genomics
  • Bioinformatics

Background:

  • Metagenomics enables the study of microbial communities without culturing, offering insights into microbial ecology.
  • Advancements in high-throughput sequencing generate massive datasets for microbial population analysis.
  • Understanding microbial diversity and adaptation is crucial across various environments.

Purpose of the Study:

  • To review the essential components of metagenomic studies.
  • To identify and discuss challenges and current solutions in metagenomic workflows.
  • To provide examples of metagenomic applications in diverse environmental contexts.

Main Methods:

  • Sample collection and DNA extraction protocols.
  • High-throughput sequencing technologies for data generation.

Related Experiment Videos

  • Bioinformatic pipelines for sequence analysis and interpretation.

    • Main Results:

    • Metagenomic approaches reveal extensive microbial diversity and adaptive strategies.
    • Challenges exist in sample handling, data processing, and interpretation.
    • Solutions are being developed to address technical and computational hurdles.

    Conclusions:

    • Metagenomics is a powerful tool for exploring microbial life in various ecosystems.
    • The integration of sequencing and bioinformatics is key to successful metagenomic studies.
    • Ongoing research continues to refine methodologies and expand applications.