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Related Experiment Videos

Making and breaking disulfide bonds

S Raina1, D Missiakas

  • 1Centre Médical Universitaire, Département de Biochimie Médicale, Genève, Switzerland. Satish.Raina@medecine.unige.ch

Annual Review of Microbiology
|January 1, 1997
PubMed
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Protein folding in vivo requires helper proteins. This study reveals novel redox proteins in prokaryotic periplasms that catalyze disulfide bond formation, crucial for protein structure and function.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Protein folding in vivo necessitates the assistance of molecular chaperones and folding helpers.
  • The formation and isomerization of disulfide bonds, critical for protein stability and function, are slow, enzyme-catalyzed processes.
  • Disulfide bond formation typically occurs in the endoplasmic reticulum (eukaryotes) or periplasm (Gram-negative bacteria) concurrently with polypeptide folding.

Purpose of the Study:

  • To summarize the discovery of redox proteins involved in disulfide bond formation in prokaryotic periplasms.
  • To present recent insights into the biochemical and biological activities of these newly identified redox proteins.

Main Methods:

  • Genetic approaches were employed to identify novel redox proteins.

Related Experiment Videos

  • Biochemical assays were utilized to characterize the catalytic activities of these proteins.
  • Biological studies were conducted to elucidate their in vivo functions.

    • Main Results:

    • Several novel redox proteins residing in the prokaryotic periplasm have been identified.
    • These proteins have been shown to catalyze the formation and isomerization of disulfide bonds.
    • Their specific roles in protein folding and cellular processes are being elucidated.

    Conclusions:

    • Prokaryotes possess dedicated redox systems in the periplasm for efficient disulfide bond formation.
    • These findings expand our understanding of protein folding machinery beyond eukaryotes.
    • Further research into these redox proteins will illuminate their broader biological significance.