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Peroxicretion: a novel secretion pathway in the eukaryotic cell
Cees M J Sagt1, Peter J ten Haaft, Ingeborg M Minneboo
1DSM Biotechnology Center, Beijerinck Laboratory, PO Box 1, 2600MA Delft, the Netherlands. cees.sagt@dsm.com
BMC Biotechnology
|May 22, 2009
Summary
Researchers developed a novel secretion pathway called peroxicretion, using peroxisomes to release intracellular proteins. This method enhances enzyme production from microbial and mammalian cells, reducing downstream processing costs.
Area of Science:
- Cell Biology
- Biotechnology
- Protein Secretion
Background:
- Industrial enzyme production is limited by costly downstream processing for intracellular enzymes.
- Extracellular enzymes are mainly hydrolases, while intracellular enzymes offer greater diversity.
- A novel secretion pathway using peroxisomes was developed to overcome these limitations.
Purpose of the Study:
- To engineer a system for secreting intracellular proteins using peroxisomes.
- To enable the extracellular release of diverse intracellular enzymes for industrial applications.
Main Methods:
- Peroxisomes were modified with a Golgi-derived v-SNARE to enable fusion with the plasma membrane.
- Intracellular proteins were targeted to peroxisomes using a peroxisomal import signal (SKL tag).
- The artificial secretion pathway, termed peroxicretion, was validated using electron microscopy.
Main Results:
- Peroxisomes successfully fused with the plasma membrane, enabling secretion.
- Intracellular proteins tagged with SKL were imported into peroxisomes.
- Peroxicretion facilitated the release of diverse intracellular proteins into the extracellular space.
Conclusions:
- Rerouting intracellular vesicle trafficking by manipulating SNARE localization is feasible.
- This approach offers insights into intracellular membrane trafficking control mechanisms.
- Peroxicretion has the potential to revolutionize intracellular protein production from various cell types, including microbial and mammalian cells.
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