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Related Concept Videos

Flagella and Motility in Bacteria01:18

Flagella and Motility in Bacteria

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Flagella are specialized, thread-like structures that extend from a bacteria's cell envelope. They play a crucial role in motility and chemotaxis. Their structural organization and functioning exemplify sophisticated biological engineering, enabling bacterial survival and adaptability in diverse environments.Structure of the FlagellumA bacterial flagellum consists of three key components: the filament, the hook, and basal body. The filament, a long, helical structure composed of repeating...
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Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...
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Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
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Fimbriae and pili are specialized bacterial surface structures that play pivotal roles in adhesion, genetic exchange, and motility. Composed primarily of pilin protein, these hairlike appendages are crucial for bacterial survival and pathogenicity in various environments.Fimbriae: Adhesion and PathogenicityFimbriae are fine, filamentous structures measuring 2–10 nanometers in diameter and are densely distributed on the bacterial cell surface. They facilitate bacterial adhesion to abiotic...
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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...
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Visualizing Bacterial Motility Based on a Color Reaction
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Bacterial Flagellins: Does Size Matter?

Nicholas M Thomson1, Florian M Rossmann2, Josie L Ferreira2

  • 1Quadram Institute, Norwich Research Park, Norwich, Norfolk, NR4 7UA, UK.

Trends in Microbiology
|December 21, 2017
PubMed
Summary
This summary is machine-generated.

Giant flagellins, bacterial proteins over 1000 amino acids long, possess large variable domains. These giant flagellins are found in various bacterial contexts, offering potential biotechnological applications.

Keywords:
bacterial flagellumevolutionflagellinsurface display

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Biotechnology

Background:

  • The bacterial flagellum is essential for bacterial motility.
  • Flagellin is the primary protein subunit of the flagellar filament.

Purpose of the Study:

  • To investigate the phenomenon of 'giant flagellins' in bacterial motility.
  • To explore the functions and biotechnological potential of large flagellins.

Main Methods:

  • Review of existing literature on flagellin structure and function.
  • Analysis of the occurrence and characteristics of giant flagellins.

Main Results:

  • Identification of multiple bacterial species possessing 'giant flagellins' exceeding 1000 amino acids.
  • Observation of large, surface-exposed, hypervariable domains in these giant flagellins.

Conclusions:

  • Giant flagellins represent a significant variation in bacterial motility structures.
  • The unique domains of giant flagellins may serve specialized functions.
  • Nature's examples of giant flagellins offer a foundation for biotechnological innovation.