To explore network evolvability, we constructed recombinations of promoters (including regulatory regions) with different transcription or σ-factor genes in. Skip to main content. European Bioinformatics Institute. Evolvability and hierarchy in rewired bacterial gene networks. Sequencing DNA from several organisms has revealed that duplication and drift of existing genes have primarily moulded the contents of a given genome.

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Evolvability and hierarchy in rewired bacterial gene networks

Skip to search form Skip to main content. From This Paper Figures, tables, and topics from this paper. Topics Discussed in This Paper. Zinc-finger protein-targeted gene regulation: Protein folding and conformational stress in microbial cells producing recombinant proteins: DBF2 Figure 2A indicate that it is the rewiring events themselves driving enhanced expression.

This library-reporter vector was then linearized by restriction digestion using two separate enzymes to minimize library component loss due to double cutting and transformed into P.

Clones with enhanced netwoorks expression are selected and re-screened to verify enhanced expression. This independent cloning and validation of expression enhancement also clearly shows that our library screening process identifies rewiring solutions that can enhance heterologous production of proteins with wide ranging physiological properties. Regulatory Sequences, Nucleic Acid promoter. Showing of extracted citations. I agree to the terms and conditions.


A paired two-sample t test was used to determine the significant difference in GFP fluorescence between control and rewired lines.

Evolvability and hierarchy in rewired bacterial gene networks – Dimensions

These solutions may suggest that variable regulation of stress responses hierarrchy lead to improvements in heterologous production. Here, again a single vector was assembled containing both library components and the terpenoid pathway components. We then normalized the fluorescence of each clone by subtracting mean plate fluorescence and dividing by plate standard deviation.

Your comment will be reviewed and published at the journal’s discretion. The most productive clone SNZ URE2-like strain Figure 2Csuggesting that this rewiring is a general solution to enhancing protein expression. Proceedings of the National Academy of Sciences 21, Production of recombinant proteins and metabolites bactegial yeasts: High-throughput assay and engineering of self-cleaving ribozymes by sequencing. The URE2 gene product of Saccharomyces cerevisiae plays an important role in the cellular response to the nitrogen source and has homology to glutathione s-transferases.

This is accomplished by transforming a strain with a synthetic genetic construct that consists of a promoter fused to a coding sequence CDS of a transcriptional regulator Figure 1A. The improved enzymatic activity of the lipase further suggests that this rewiring solution is capable of producing functional protein.


A General strategy for genetic rewiring.

Citations Publications citing this paper. Individual rewired promoter and CDS components are integrated into a single vector with a suitable heterologous reporter construct.

Nuclear mRNA accumulation causes nucleolar fragmentation in yeast mtr2 mutant. Proteins were constructed as fusions with GFP to observe expression level.

Evolvability and hierarchy in rewired bacterial gene networks.

The fact that the rewiring screen derives solutions that emulate naturally evolved adaptive networks suggests a general strategy for coping with stress in microbial regulatory networks. MAC1, isolated three times in the Insulin library a comparatively smaller simpler structured protein. Advances in zinc finger engineering Y Choo, M Isalan Current opinion in structural nierarchy 10 4, Here again we designed and built a single vector to integrate both the terpenoid pathway and the library into the his4 locus Figure 3A.

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