Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of wild type and orb2 knock-out Drosophila melanogaster

ABSTRACT: Examination of developmental impact of orb2 knockout

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Ariel Paulson

PROVIDER: E-TABM-527 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Drosophila Orb2 targets genes involved in neuronal growth, synapse formation, and protein turnover.

Mastushita-Sakai Tomoko T White-Grindley Erica E Samuelson Jessica J Seidel Chris C Si Kausik K

Proceedings of the National Academy of Sciences of the United States of America 20100614 26

In the study of long-term memory, how memory persists is a fundamental and unresolved question. What are the molecular components of the long-lasting memory trace? Previous studies in Aplysia and Drosophila have found that a neuronal variant of a RNA-binding protein with a self-perpetuating prion-like property, cytoplasmic polyadenylation element binding protein, is required for the persistence of long-term synaptic facilitation in the snail and long-term memory in the fly. In this study, we hav ...[more]

PMID: 20547833

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Project description:Resistance of Saccharomyces cerevisiae to high furfural concentration is based on NADPH-dependent reduction by at least two oxireductases. Biofuels derived from lignocellulosic biomass hold promises for a sustainable fuel economy, but several problems hamper their economical feasibility. One important problem is the presence of toxic compounds in processed lignocellulosic hydrolysates with furfural as a key toxin. While Saccharomyces cerevisiae has some intrinsic ability to reduce furfural to the less toxic furfuryl alcohol, higher resistance is necessary for process conditions. By comparing an evolved, furfural resistant strain and its parent in micro-aerobic, glucose-limited chemostats at increasing furfural challenge, we elucidate key mechanism and the molecular basis of both natural and high-level furfural resistance. At lower furfural concentrations, NADH-dependent oxireductases are the main defence mechanism. At concentrations above 15 mM, however, [1-13C]-flux and global array-based transcript analysis demonstrated that the NADPH-generating flux through pentose-phosphate pathway increases and that NADPH-dependent oxireductases became the major resistance mechanism. The transcript analysis further revealed that iron transmembrane transport is up-regulated in response to furfural. While these responses occur in both strains, high-level resistance in the evolved strain was based on strong induction of ADH7, the uncharacterised ORF YKL071W and 4 further, likely NADPH-dependent oxireductases. By overexpressing the ADH7 gene and the ORF YKL071W, we inverse engineered significantly increased furfural resistance in the parent strain, thereby demonstrating these two enzymes to be key elements of the resistance phenotype. Experiment Overall Design: RNA levels were measured in glucose limited, micro-aerobic chemostat cultures with different concentrations of the growth inhibitor furfural. Two strains were compared: TMB3400-FT30-3 is a strain that has been evolutionary adapted to withstand high furfural concentrations. TMB3400 is its less resistant parent. Number of biological replicates: 2-3.

Dataset Information

Transcription profiling of wild type and orb2 knock-out Drosophila melanogaster

Publications

Drosophila Orb2 targets genes involved in neuronal growth, synapse formation, and protein turnover.

Similar Datasets

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