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Modulation of gene expression by cocktail δ-integration to improve carotenoid production in Saccharomyces cerevisiae.

08:00 EDT 15th August 2018 | BioPortfolio

Summary of "Modulation of gene expression by cocktail δ-integration to improve carotenoid production in Saccharomyces cerevisiae."

Carotenoids, including β-carotene, are commercially valuable compounds, and their production by engineered Saccharomyces cerevisiae is a promising strategy for their industrial production. Here, to improve β-carotene productivity in engineered S. cerevisiae, a cocktail δ-integration strategy, which involves simultaneous integration of various multi-copy genes, followed by selection of desirable transformants, was applied for modulation of β-carotene production-related genes expression. The engineered strain, YPH499/Mo3Crt79, was constructed by three repeated rounds of cocktail δ-integration using CrtE, CrtYB, and CrtI derived from the yeast, Xanthophyllomyces dendrorhous. The recombinant strain produced 7.3 mg/L of carotenoids in 48 h and 52.3 mg/L of β-carotene in 96 h, which were greater values than those achieved by CrtE, CrtYB, and CrtI co-overexpressing strains. Therefore, repeated cocktail δ-integration was effective in improving carotenoid productivity in S. cerevisiae and could be a promising technique for constructing metabolically engineered S. cerevisiae capable of producing bio-based chemicals.

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This article was published in the following journal.

Name: Bioresource technology
ISSN: 1873-2976
Pages: 616-621

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Medical and Biotech [MESH] Definitions

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A form of gene interaction whereby the expression of one gene interferes with or masks the expression of a different gene or genes. Genes whose expression interferes with or masks the effects of other genes are said to be epistatic to the effected genes. Genes whose expression is affected (blocked or masked) are hypostatic to the interfering genes.

Techniques used to add in exogenous gene sequence such as mutated genes; REPORTER GENES, to study mechanisms of gene expression; or regulatory control sequences, to study effects of temporal changes to GENE EXPRESSION.

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