HETEROLOGOUS GENE EXPRESSION IN BACTERIAL SYSTEMS UNDER REDUCED OXYGEN TENSIONS. SMALL-SCALE OPTIMIZATION PRECEDES INDUSTRIAL FERMENTATION

2001 ◽  
Vol 31 (1) ◽  
pp. 13-22 ◽  
Author(s):  
A. W. Taylor-Robinson ◽  
K. G. Heal
Keyword(s):  
Gene Expression ◽  
Heterologous Gene Expression ◽  
Heterologous Gene ◽  
Small Scale ◽  
Industrial Fermentation ◽  
Oxygen Tensions ◽  
Scale Optimization ◽  
Bacterial Systems

scholarly journals Optimization of Heterologous Gene Expression for In Vitro Evolution

BioTechniques ◽  
2001 ◽  
Vol 30 (3) ◽  
pp. 474-476 ◽  
Author(s):  
Ichiro Matsumura ◽  
Mark J. Olsen ◽  
Andrew D. Ellington
Keyword(s):  
Gene Expression ◽  
Heterologous Gene Expression ◽  
Heterologous Gene ◽  
In Vitro Evolution

Production of foreign proteins in the yeast Pichia pastoris

1995 ◽  
Vol 73 (S1) ◽  
pp. 891-897 ◽  
Author(s):  
James M. Cregg ◽  
David R. Higgins
Keyword(s):  
Gene Expression ◽  
Pichia Pastoris ◽  
Heterologous Gene Expression ◽  
Expression System ◽  
Methylotrophic Yeast ◽  
Culture Broth ◽  
Heterologous Gene ◽  
Foreign Gene ◽  
Heterologous Proteins ◽  
Yeast Pichia Pastoris

The methanol-utilizing yeast Pichia pastoris has been developed as a host system for the production of heterologous proteins of commercial interest. An industrial yeast selected for efficient growth on methanol for biomass generation, P. pastoris is readily grown on defined medium in continuous culture at high volume and density. A unique feature of the expression system is the promoter employed to drive heterologous gene expression, which is derived from the methanol-regulated alcohol oxidase I gene (AOX1) of P. pastoris, one of the most efficient and tightly regulated promoters known. The strength of the AOX1 promoter results in high expression levels in strains harboring only a single integrated copy of a foreign-gene expression cassette. Levels may often be further enhanced through the integration of multiple cassette copies into the P. pastoris genome and strategies to construct and select multicopy cassette strains have been devised. The system is particularly attractive for the secretion of foreign-gene products. Because P. pastoris endogenous protein secretion levels are low, foreign secreted proteins often appear to be virtually the only proteins in the culture broth, a major advantage in processing and purification. Key words: heterologous gene expression, methylotrophic yeast, Pichia pastoris, secretion, glycosylation.

Can heterologous gene expression shed (a torch) light on protein function?

2004 ◽  
Vol 22 (11) ◽  
pp. 557-559 ◽  
Author(s):  
Pascal Dubessay ◽  
Michel Pagès ◽  
Frédéric Delbac ◽  
Patrick Bastien ◽  
Christian Vivares ◽  
...  
Keyword(s):  
Gene Expression ◽  
Protein Function ◽  
Heterologous Gene Expression ◽  
Heterologous Gene

High-level heterologous gene expression in Saccharomyces cerevisiae from a stable 2μm plasmid system

Gene ◽  
1993 ◽  
Vol 132 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Dale L. Ludwig ◽  
Simone Ugolini ◽  
Carlo V. Bruschi
Keyword(s):  
Gene Expression ◽  
Saccharomyces Cerevisiae ◽  
Heterologous Gene Expression ◽  
Heterologous Gene ◽  
High Level

scholarly journals An overview on current molecular tools for heterologous gene expression in Trichoderma

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Irene Tomico-Cuenca ◽  
Robert L. Mach ◽  
Astrid R. Mach-Aigner ◽  
Christian Derntl
Keyword(s):  
Gene Expression ◽  
Protein Expression ◽  
Protein Secretion ◽  
Heterologous Gene Expression ◽  
Heterologous Gene ◽  
Molecular Tools ◽  
Expression Systems ◽  
Industrial Enzymes ◽  
Nutrient Sources ◽  
Transformation Methods

AbstractFungi of the genus Trichoderma are routinely used as biocontrol agents and for the production of industrial enzymes. Trichoderma spp. are interesting hosts for heterologous gene expression because their saprotrophic and mycoparasitic lifestyles enable them to thrive on a large number of nutrient sources and some members of this genus are generally recognized as safe (GRAS status). In this review, we summarize and discuss several aspects involved in heterologous gene expression in Trichoderma, including transformation methods, genome editing strategies, native and synthetic expression systems and implications of protein secretion. This review focuses on the industrial workhorse Trichoderma reesei because this fungus is the best-studied member of this genus for protein expression and secretion. However, the discussed strategies and tools can be expected to be transferable to other Trichoderma species.

scholarly journals Hands-free control of heterologous gene expression in batch cultures

2017 ◽  
Author(s):  
Olivier Borkowski ◽  
Drew Endy ◽  
Pakpoom Subsoontorn
Keyword(s):  
Gene Expression ◽  
Batch Culture ◽  
Communication Systems ◽  
Heterologous Gene Expression ◽  
Cell Communication ◽  
Culture Conditions ◽  
Heterologous Gene ◽  
Synthetic Cell ◽  
Genetic Systems ◽  
Application Specific

AbstractBackgroundAutonomous cell-based control of heterologous gene expression can simplify batch-culture bioprocessing by eliminating external monitoring and extrinsic control of culture conditions. Existing approaches use auto-induction media, synthetic cell-cell communication systems, or application-specific biosensors. A simpler, resource-efficient, and general-purpose expression control system responsive to common changes during batch culture would be useful.ResultsWe used nativeE.colipromoters and recombinase-based switches to repurpose endogenous transcription signals for control of heterologous gene expression. Specifically, natural changes in transcription from endogenous promoters result in recombinase expression at different phases of batch culture. So-expressed recombinases invert a constitutive promoter regulating expression of arbitrary heterologous genes. We realized reversible and single-use switching, reduced static and dynamic cell-to-cell variation, and overall expression amplification. We used “off-the-shelf” genetic parts and abstraction-based composition frameworks to realize reliable forward engineering of our synthetic genetic systems.ConclusionWe engineered autonomous control systems for regulating heterologous gene expression. Our system uses generic endogenous promoters to sense and control heterologous expression during growth-phase transitions. Our system does not require specialized auto-induction media, production or activation of quorum sensing, or the development of application-specific biosensors. Cells programmed to control themselves could simplify existing bioprocess operations and enable the development of more powerful synthetic genetic systems.

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