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Published on: March 9, 2018
High-yield secretion of multiple client proteins in Aspergillus
Fernando Segato1, André R L Damásio, Thiago A Gonçalves
1Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK 74078, USA.
Enzyme and Microbial Technology
|June 6, 2012
Summary
This study engineered a novel vector (pEXPYR) for high-yield protein secretion in fungi, achieving up to 100 mg/L of hemicellulose-degrading enzymes and enabling simultaneous hyper-secretion of multiple proteins.
Area of Science:
- Biotechnology
- Molecular Biology
- Biochemistry
Background:
- Fungi are key in industrial protein production due to high protein secretion capacity.
- Efficient production of pure, high-yield proteins is crucial for industrial enzymes and scientific research.
Purpose of the Study:
- To engineer a high-expression-secretion vector (pEXPYR) for extracellular protein production in Aspergillus species.
- To investigate maltose-induced overexpression, secretion efficiency, and protein stability in the medium.
- To enable simultaneous hyper-secretion of multiple client proteins using a recyclable genetic marker.
Main Methods:
- Engineered the pEXPYR vector for protein secretion in two Aspergillus host strains.
- Examined maltose-induced overexpression and protein secretion dynamics.
- Assessed protein stability concerning time and pH in the extracellular medium.
- Utilized a recyclable genetic marker for serial gene insertion.
Main Results:
- Achieved accumulation of five client proteins (hemicellulose degrading enzymes) at concentrations of 50-100 mg/L.
- Demonstrated successful simultaneous hyper-secretion of three client proteins in a single host strain.
- Characterized protein stability under various time and pH conditions.
Conclusions:
- The pEXPYR vector is effective for high-level protein secretion in Aspergillus.
- Engineered fungal strains can efficiently produce multiple industrial enzymes simultaneously.
- This technology advances protein production for industrial and research applications.
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