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Related Experiment Videos

Periplasmic binding protein-dependent transport systems: the membrane-associated components.

C F Higgins1, M P Gallagher, S C Hyde

  • 1Department of Biochemistry, University of Dundee, Scotland, U.K.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|January 30, 1990
PubMed
Summary

Periplasmic binding protein-dependent transport systems utilize ATP hydrolysis for energy. These widespread systems, found in various organisms, share common mechanisms despite diverse functions.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Periplasmic binding protein-dependent transport systems are complex, involving inner membrane proteins and periplasmic components.
  • These systems exhibit conserved organization and function, suggesting a common transport mechanism across different substrate specificities.

Purpose of the Study:

  • To review current understanding of periplasmic transport system components.
  • To clarify the energy coupling mechanism in these transport systems.
  • To highlight the identification and widespread nature of related systems in diverse organisms.

Main Methods:

  • Review of existing literature on periplasmic transport systems.
  • Analysis of recent data on energy coupling mechanisms.

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  • Comparative analysis of transport systems across different organisms.

    • Main Results:

    • ATP hydrolysis is confirmed as the primary energy source for periplasmic transport.
    • ATP-binding components are key in coupling ATP hydrolysis to biological processes.
    • Related transport systems are found in Gram-positive bacteria and eukaryotic cells, indicating broad prevalence.

    Conclusions:

    • Periplasmic binding protein-dependent transport systems function via a common mechanism driven by ATP hydrolysis.
    • These systems are evolutionarily conserved and play diverse, essential roles in various life forms.
    • Further research into these widespread transport systems is warranted.