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Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
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Membrane-enclosed structures called vesicles transport proteins and lipids across the cell. The vesicles derive their cargo from the plasma membrane, Golgi, ER, or endosome. Coated vesicles are spherical, protein-coated carriers with a 50–100 nm diameter that mediate bidirectional transport between the ER and the Golgi. The distribution of proteins between the ER and Golgi complex is dynamic and is maintained by different coated vesicles. Their formation is driven by the assembly of...
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Size Exclusion Chromatography to Analyze Bacterial Outer Membrane Vesicle Heterogeneity
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Cracking Open Bacterial Membrane Vesicles.

Toshiki Nagakubo1, Nobuhiko Nomura1,2, Masanori Toyofuku1,2

  • 1Department of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan.

Frontiers in Microbiology
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Bacterial membrane vesicles (MVs) are nanoparticles with diverse functions. This review highlights recent progress in understanding the biochemical composition and properties of these heterogeneous MVs.

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cargo selectionendocytosislipidomemembrane fusionmembrane vesiclesproteome

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Area of Science:

  • Microbiology
  • Nanotechnology
  • Biochemistry

Background:

  • Membrane vesicles (MVs) are lipid nanoparticles produced by bacteria.
  • MVs possess diverse biological functions and application potential.
  • Mechanisms of MV biogenesis and function remain incompletely understood.

Purpose of the Study:

  • To review recent advancements in understanding bacterial MV biochemical composition.
  • To discuss the properties of MVs and their implications for function and origin.
  • To highlight the heterogeneity of MVs released from bacterial species.

Main Methods:

  • Literature review of recent studies on bacterial MVs.
  • Analysis of data on MV biochemical composition and properties.
  • Synthesis of current knowledge on MV biogenesis and function.

Main Results:

  • Evidence indicates significant heterogeneity in MV composition from the same bacterial species.
  • Biochemical properties are crucial for understanding MV origins and functions.
  • Diverse biological roles are attributed to MVs, underscoring their importance.

Conclusions:

  • Understanding MV biochemical properties is key to deciphering their roles.
  • Further research is needed to fully elucidate MV biogenesis and functional mechanisms.
  • Bacterial MVs represent a promising area for biotechnological and biomedical applications.