Project description:Transcriptional profiling of Haloarcula hispanica wild-type strain cultured in different media comparing MG medium with 168 medium. H. hispanica wild-type strain can accumulate PHBV in MG medium, while can not in 168 medium. Goal was to explore the PHA biosynthesis and its impact on central metabolism in H. hispanica.
Project description:Transcriptional profiling of Haloarcula hispanica wild-type strain cultured in different media comparing MG medium with 168 medium. H. hispanica wild-type strain can accumulate PHBV in MG medium, while can not in 168 medium. Goal was to explore the PHA biosynthesis and its impact on central metabolism in H. hispanica. Total RNA from MG and 168 were used to generate target cDNA, and then hybridized to 8*15K Haloarcula hispanica genome array genechips, representing about 3800 genes.
Project description:Background: Pantoea ananatis LMG 2665T synthesizes and utilizes acyl homoserine lactones (AHLs) for signaling. In this strain, short chain AHLs (C4 to C8) are produced by the EanI/R quorum sensing (QS) system that is involved in pathogenicity and biofilm formation. The complete set of genes regulated by the EanI/R system in P. ananatis LMG 2665T is still not fully known. In the present study, RNA-seq was used to analyze the transcriptome profiles controlled by the EanI/R system in this strain by comparing the wild type strain and its QS mutant 2665T ean∆I/R during lag and log stages. The RNA seq data was validated by RT qPCR. Results: The results showed that the EanI/R regulon in P. ananatis LMG 2665T comprised 144 genes, constituting 3.3% of the whole transcriptome under the experimental conditions in this study. The majority of genes regulated by the EanI/R system included genes for flagella assembly, bacterial chemotaxis, pyruvate metabolism, two component system, metabolic pathways, microbial metabolism and biosynthesis of secondary metabolites. Conclusions: This is the first study to identify the EanI/R QS regulon in P. ananatis LMG 2665T. Functional analysis of genes regulated the EanI/R system in LMG 2665T could help unveil genes that play a vital role in pathogenesis and survival strategies of this pathogen.
Project description:Transcriptional profiling of Haloarcula hispanica comparing PHB with 960. PHB represents the PHA synthase genes mutant (i.e., ΔphaEC) which is deficient in PHBV accumulation when grown in MG medium. 960 represents the wild-type strain which can produce PHBV when grown in MG medium. Goal was to explore the PHBV biosynthesis and its impact on central metabolism in H. hispanica.
Project description:Transcriptional profiling of Haloarcula hispanica comparing PHB with 960. PHB represents the PHA synthase genes mutant (i.e., M-NM-^TphaEC) which is deficient in PHBV accumulation when grown in MG medium. 960 represents the wild-type strain which can produce PHBV when grown in MG medium. Goal was to explore the PHBV biosynthesis and its impact on central metabolism in H. hispanica. Total RNA from PHB and 960 were used to generate target cDNA, and then hybridized to 8*15K Haloarcula hispanica genome array genechips, representing about 3800 genes.