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Related Concept Videos

Nucleoid01:24

Nucleoid

The nucleoid represents a structurally and functionally distinct region within prokaryotic cells, where the cell's DNA and associated proteins are housed. Unlike eukaryotic cells, prokaryotes lack a membrane-bound nucleus, and the nucleoid facilitates the organization and accessibility of the genetic material within this constraint. The DNA in most bacteria and archaea exists as a single, circular, double-stranded molecule that is highly compacted through supercoiling and interactions with...
Cytoskeletal Proteins in Bacteria01:29

Cytoskeletal Proteins in Bacteria

Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in bacteria led to the change of this opinion. Bacterial cytoskeletal filaments regulate the cell shape, cell polarity, cell division, and partitioning of plasmids during cell division. It was later discovered that bacterial cytoskeletal proteins, mainly actin and tubulin homologs, are diverse compared to their eukaryotic counterparts. On the...
Prokaryotic Cells01:28

Prokaryotic Cells

Prokaryotes are small unicellular organisms that include the domains — Archaea and Bacteria. Bacteria include many common microorganisms, such as Salmonella and E. coli, while the Archaea include extremophiles that live in harsh environments, such as volcanic springs.
Like eukaryotic cells, all prokaryotic cells are surrounded by a plasma membrane, have genetic material in the form of single, circular DNA, a cytoplasm that fills the interior of the cell, and ribosomes that synthesize proteins.
Prokaryotic Cells01:51

Prokaryotic Cells

Prokaryotes are small unicellular organisms that include the domains—Archaea and Bacteria. Bacteria include many common organisms, such as Salmonella and E. coli, while the Archaea include extremophiles that live in harsh environments, such as volcanic springs.Like eukaryotic cells, all prokaryotic cells are surrounded by a plasma membrane, have genetic material in the form of single, circular DNA, a cytoplasm that fills the interior of the cell, and ribosomes that synthesize proteins. However,...
Prokaryotic cells01:51

Prokaryotic cells

Prokaryotes are small unicellular organisms that include the domains—Archaea and Bacteria. Bacteria include many common organisms, such as Salmonella and E. coli, while the Archaea include extremophiles that live in harsh environments, such as volcanic springs.Like eukaryotic cells, all prokaryotic cells are surrounded by a plasma membrane, have genetic material in the form of single, circular DNA, a cytoplasm that fills the interior of the cell, and ribosomes that synthesize proteins. However,...
Bacterial RNA Polymerase00:43

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...

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Related Experiment Video

Updated: Jun 25, 2026

In Vitro Reconstitution of Self-Organizing Protein Patterns on Supported Lipid Bilayers
08:10

In Vitro Reconstitution of Self-Organizing Protein Patterns on Supported Lipid Bilayers

Published on: July 28, 2018

Nucleoid-associated proteins and bacterial physiology.

Charles J Dorman1

  • 1Department of Microbiology, School of Genetics and Microbiology, Trinity College, Dublin 2, Ireland.

Advances in Applied Microbiology
|February 28, 2009
PubMed
Summary

The postgenomic era reveals bacterial physiology

Area of Science:

  • Bacterial physiology
  • Genomics
  • Molecular biology

Background:

  • The postgenomic era presents challenges in interpreting vast amounts of new genomic and gene regulation data.
  • Model organisms like Escherichia coli are crucial for understanding bacterial gene expression.
  • Global gene regulation mechanisms, involving a few proteins controlling many genes, are key to bacterial adaptation.

Purpose of the Study:

  • To highlight the importance of studying bacterial physiology in the postgenomic era.
  • To emphasize the role of model organisms in interpreting genomic data.
  • To explore global gene regulation mechanisms and their impact on bacterial competitiveness.

Main Methods:

  • Genome sequencing projects.
  • Whole-genome analyses of transcriptional and posttranscriptional gene regulation.

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Published on: June 20, 2018

Three-dimensional Imaging of Bacterial Cells for Accurate Cellular Representations and Precise Protein Localization
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Three-dimensional Imaging of Bacterial Cells for Accurate Cellular Representations and Precise Protein Localization

Published on: October 29, 2019

Related Experiment Videos

Last Updated: Jun 25, 2026

In Vitro Reconstitution of Self-Organizing Protein Patterns on Supported Lipid Bilayers
08:10

In Vitro Reconstitution of Self-Organizing Protein Patterns on Supported Lipid Bilayers

Published on: July 28, 2018

Fluorescence Live-cell Imaging of the Complete Vegetative Cell Cycle of the Slow-growing Social Bacterium Myxococcus xanthus
11:45

Fluorescence Live-cell Imaging of the Complete Vegetative Cell Cycle of the Slow-growing Social Bacterium Myxococcus xanthus

Published on: June 20, 2018

Three-dimensional Imaging of Bacterial Cells for Accurate Cellular Representations and Precise Protein Localization
06:33

Three-dimensional Imaging of Bacterial Cells for Accurate Cellular Representations and Precise Protein Localization

Published on: October 29, 2019

  • Studies on nucleoid-associated proteins in model organisms.

    • Main Results:

    • Nucleoid-associated proteins, including Factor for Inversion Stimulation (Fis), IHF, H-NS, HU, and Lrp, are identified as prominent global regulators.
    • Research on these proteins provides new insights into bacterial gene expression control.
    • Understanding these regulators helps elucidate how bacteria maximize their competitive advantage.

    Conclusions:

    • Bacterial physiology is undergoing a renaissance driven by postgenomic data.
    • Global regulators, particularly nucleoid-associated proteins, play a critical role in bacterial adaptation and survival.
    • Further investigation into these regulators will deepen our understanding of bacterial gene expression and competitive strategies.