Project description:Transcriptional profiling of Haloferax mediterranei in three culture media with different nitrogen sources: a) cells were grown stationary and exponentially on ammonium, b) cells were grown exponentially on nitrate, and c) cells were shifted to nitrogen starvation conditions. The main differences in the transcriptional profiles have been identified between the cultures with ammonium as nitrogen source and the cultures with nitrate or nitrogen starvation, supporting previous results which indicate the absence of ammonium as the factor causing the expression of genes involved in nitrate assimilation pathway.
Project description:Transcriptional profiling of Haloferax mediterranei in three culture media with different nitrogen sources: a) cells were grown stationary and exponentially on ammonium, b) cells were grown exponentially on nitrate, and c) cells were shifted to nitrogen starvation conditions. The main differences in the transcriptional profiles have been identified between the cultures with ammonium as nitrogen source and the cultures with nitrate or nitrogen starvation, supporting previous results which indicate the absence of ammonium as the factor causing the expression of genes involved in nitrate assimilation pathway. Four-conditions experiment with four biological replicates, combined in a loop design.
Project description:Transcriptional profiling of Haloferax mediterranei DF50 and M-NM-^TdeoR2 with induction by fructose comparing with the strains without this induction. Goal was to explore the effect of induction by fructose on Haloferax mediterranei. Total RNA from the Haloferax mediterranei DF50 and M-NM-^TdeoR2 with or without induction by fructose were used to generate target cDNA, and then hybridized to Haloferax mediterranei genome array genechips, representing about 3800 genes.
Project description:Transcriptional profiling of Haloferax mediterranei DF50 and ΔdeoR2 with induction by fructose comparing with the strains without this induction. Goal was to explore the effect of induction by fructose on Haloferax mediterranei.
Project description:Transcriptional profiling of Haloferax mediterranei comparing control wild-type strain with M-NM-^TphaA1 strain, in which phaA1 gene are knockouted. M-NM-^TphaA1 strain can accumulate PHB only. Goal was to explore the PHA biosynthetic pathway and to determine their impact on primary metabolism in H. mediterranei. Total RNA from the control Haloferax mediterranei and its M-NM-^TphaA1 strain were used to generate target cDNA, and then hybridized to 8*15K Haloferax mediterranei genome array genechips, representing about 3800 genes.
Project description:Transcriptional profiling of Haloferax mediterranei comparing control wild-type strain with M-NM-^TphaEC strain, in which PHA synthase genes are knockouted. M-NM-^TphaEC strain is deficient in PHBV accumulation. Goal was to explore the PHBV biosynthetic pathway and to determine their impact on primary metabolism in H. mediterranei. Total RNA from the control Haloferax mediterranei and its M-NM-^TphaEC strain were used to generate target cDNA, and then hybridized to 8*15K Haloferax mediterranei genome array genechips, representing about 3800 genes.
Project description:Transcriptional profiling of Haloferax mediterranei DglnA and HM26 strains in two different culture media: a) cells were grown exponentially on complex media + 40 mM Gln, b) cells were shifted to nitrogen starvation conditions (72h). In the Nsta(∆glnA)-Cx and Nsta-Cx contrasts, glnA2 was up-regulated, and glnA3 did not show any difference. Therefore, glnA2 and glnA3 were unable to compensate lack of glnA because either they do not properly encode GS or are not expressed under the same conditions.
Project description:Transcriptional profiling of Haloferax mediterranei comparing control wild-type strain with ΔphaA1 strain, in which phaA1 gene are knockouted. ΔphaA1 strain can accumulate PHB only. Goal was to explore the PHA biosynthetic pathway and to determine their impact on primary metabolism in H. mediterranei.
Project description:Transcriptional profiling of Haloferax mediterranei comparing control wild-type strain with ΔphaEC strain, in which PHA synthase genes are knockouted. ΔphaEC strain is deficient in PHBV accumulation. Goal was to explore the PHBV biosynthetic pathway and to determine their impact on primary metabolism in H. mediterranei.
Project description:A potential origin that appears to stay dormant in its native host Haloferax volcanii lacking the main active origins becomes activated and competent for replication of the entire chromosome when integrated into the chromosome of the origin-deleted H. mediterranei. Measurement of replication dynamics (marker frequency analysis; MFA) for Haloferax mediterranei H13
