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Updated: May 13, 2026
12:05
Production of Disulfide-stabilized Transmembrane Peptide Complexes for Structural Studies
Published on: March 6, 2013
Forming disulfides in the endoplasmic reticulum.
Ojore B V Oka1, Neil J Bulleid
1University of Glasgow, Glasgow, UK.
Biochimica Et Biophysica Acta
|February 26, 2013
Summary
This review explores how endoplasmic reticulum (ER) enzymes re-oxidize protein disulfide isomerase (PDI) oxidoreductases, enabling proper protein folding and disulfide bond formation for secreted proteins.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- Protein disulfide bonds are crucial co- and post-translational modifications for proteins in the secretory pathway.
- These covalent bonds between cysteine residues enhance structural stability and facilitate multi-protein complex assembly.
- The mammalian endoplasmic reticulum (ER) utilizes specialized enzymes for disulfide bond formation.
Purpose of the Study:
- To review the pathways in the ER responsible for oxidizing protein disulfide isomerase (PDI) oxidoreductases.
- To elucidate how these pathways ultimately catalyze disulfide bond formation in substrate proteins.
- To discuss the functional and structural diversity of the endoplasmic reticulum.
Main Methods:
- Literature review of existing research on ER protein folding and disulfide bond formation.
- Analysis of enzymatic mechanisms involved in PDI re-oxidation.
- Synthesis of information on pathways facilitating disulfide bond catalysis.
Main Results:
- Disulfide bond formation relies on the interplay of enzymes that form disulfides and those that introduce them.
- Protein disulfide isomerase (PDI) oxidoreductases are central catalysts but require re-oxidation after substrate interaction.
- Various ER pathways are dedicated to the re-oxidation of PDI, ensuring continuous disulfide bond formation.
Conclusions:
- Efficient disulfide bond formation in the ER is a tightly regulated process involving PDI re-oxidation.
- Understanding these pathways is key to comprehending protein folding and function in the secretory pathway.
- The ER's enzymatic machinery is essential for producing correctly folded and functional secreted proteins.
Keywords:
Disulfide bondOxidoreductasePeroxidaseProtein disulfide isomerase (PDI)SulfenylationThiol-disulfide exchangeMore Related Videos
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