Transcriptome analysis of isolated hyper-producer carotenoids mutants
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ABSTRACT:
ORGANISM(S): Saccharomyces cerevisiae
PROVIDER: GSE51613 | GEO | 2014/05/01
SECONDARY ACCESSION(S): PRJNA224097
REPOSITORIES: GEO
Similar Datasets
Project description:Transcriptome analysis of isolated hyper-producer carotenoids mutants obtained via adaptive evolution. Transcriptome of isolated strains was compared with the ancestral strain as reference. To emulate evolution experiments, the cells were grown in YPD until late-exponential phase. Three biological replicas of 4 samples vs reference (sample SM12 contains 4 replicas). Location of the samples in the two microarrays are described below.
2014-05-01 | E-GEOD-51613 | biostudies-arrayexpress
Project description:Transcriptome analysis of isolated hyper-producer carotenoids mutants
| PRJNA224097 | ENA
Project description:Carotenoids are a large family of health-beneficial compounds that have been widely used in the food and nutraceutical industries. There have been extensive studies to engineer Saccharomyces cerevisiae for the production of carotenoids, which already gained high level. However, it was difficult to discover new targets that were relevant to the accumulation of carotenoids. Herein, a new, ethanol-induced adaptive laboratory evolution was applied to boost carotenoid accumulation in a carotenoid producer BL03-D-4, subsequently, an evolved strain M3 was obtained with a 5.1-fold increase in carotenoid yield. Through whole-genome resequencing and reverse engineering, loss-of-function mutation of phosphofructokinase 1 (PFK1) was revealed as the major cause of increased carotenoid yield. Transcriptome analysis was conducted to reveal the potential mechanisms for improved yield, and strengthening of gluconeogenesis and downregulation of cell wall-related genes were observed in M3. This study provided a classic case where the appropriate selective pressure could be employed to improve carotenoid yield using adaptive evolution and elucidated the causal mutation of evolved strain.
2021-01-09 | GSE164470 | GEO
Project description:The filamentous fungus Trichoderma reesei is the main industrial cellulytic enzymes producer. Several strains have been developed in the past using random mutagenesis, and despite impressive performance enhancements, the pressure for low-cost cellulases has stimulated continuous research in the field. In this context, comparative study of the lower and higher producer strains obtained through random mutagenesis using systems biology tools (genome sequencing, transcriptome) can shed light on the mechanisms of cellulase production and help identify genes linked to performance. Previously, our group published comparative genome sequencing of the lower and higher producer strains NG14 and RUT C30. In this follow-up work, we examined how these mutations affect phenotype at the level of the transcriptome and cultivation behavior. We performed kinetic transcriptome analysis of the NG14 and RUT C30 strains of early cellulase production induced by lactose using bioreactor cultivations close to industrial conditions. RUT C30 exhibited both earlier onset of cellulase production and higher steady-state productivity. A rather low number of genes were regulated, most of them being specific to the NG14 strains. Clustering of these genes highlighted similar behavior for some functional categories, and allowed to distinguish between induction-related genes and productivity-related genes. The lower number of genes regulated in RUT C30 could not formally be linked to the relief in catabolic repression that is characteristic of this strain. Cross-comparison of our transcriptome data with mutations previously identified revealed that most genes from our dataset have not been mutated. Interestingly, the few mutated genes belong to the same clusters, suggesting these clusters contain genes playing a role in strain performance. This is the first kinetic transcriptome study carried out in industry-relevant conditions with two related strains of T. reesei showing distinctive performances. Our study sheds some light on some of the events occurring in these strains following induction by lactose. The fact that few regulated genes have been affected by mutagenesis suggest that the induction mechanism is essentially intact and that there is room for further improvement of T. reesei. We also provide some potential target for further genetic improvement of these strains.
2014-12-10 | GSE60908 | GEO
Project description:The filamentous fungus Trichoderma reesei is the main industrial cellulytic enzymes producer. Several strains have been developed in the past using random mutagenesis, and despite impressive performance enhancements, the pressure for low-cost cellulases has stimulated continuous research in the field. In this context, comparative study of the lower and higher producer strains obtained through random mutagenesis using systems biology tools (genome sequencing, transcriptome) can shed light on the mechanisms of cellulase production and help identify genes linked to performance. Previously, our group published comparative genome sequencing of the lower and higher producer strains NG14 and RUTM-BM- C30. In this follow-up work, we examined how these mutations affect phenotype at the level of the transcriptome and cultivation behavior.M-BM- We performed kinetic transcriptome analysis of the NG14 and RUTM-BM- C30 strains of early cellulase production induced by lactose using bioreactor cultivations close to industrial conditions. RUTM-BM- C30 exhibited both earlier onset of cellulase production and higher steady-state productivity. A rather lowM-BM- number of genes were regulated, most of them being specific to the NG14 strains. Clustering of these genes highlighted similar behavior for some functional categories, and allowed to distinguish between induction-related genes and productivity-related genes. The lower number of genes regulated in RUTM-BM- C30 could not formally be linked to the relief in catabolic repression that is characteristic of this strain. Cross-comparison of our transcriptome data with mutations previously identified revealed that most genes from our dataset have not been mutated. Interestingly, the few mutated genes belong to the same clusters, suggesting these clusters contain genes playing a role in strain performance. This is the first kinetic transcriptome study carried out in industry-relevant conditions with two related strains of T. reesei showing distinctive performances. Our study sheds some light on some of the events occurring in these strains following induction by lactose. The fact that few regulated genes have been affected by mutagenesis suggest that the induction mechanism is essentially intact and that there is room for further improvement of T. reesei. We also provide some potential target for further genetic improvement of these strains. Two biological pool by condition in dye switch. For the two biological replicates on each four experiments we apply on the pretreated results the linear modeling approach implemented by lmFit and the empirical Bayes statistics implemented by eBayes from the limma R package (Smyth 2004). We select the list of statistically regulated genes using a 5% significance threshold.
2014-12-10 | E-GEOD-60908 | biostudies-arrayexpress
Project description:We analyzed the transcriptomic response in three distinct CHO cell lines: a non-producing host cell line (CHOZN®GS-/-), an immunoglobulin G1 (IgG1) producer, and an erythropoietin Fc fusion (EPO-Fc) producer. We compared the growth and production characteristics of all three cell lines during fed-batch culture. High throughput RNA sequencing (RNASeq) and quantitative polymerase chain reaction (qPCR) were used to study differential gene expression analysis of the timecourse dataset with the host cell line CHOZN®GS-/- as the reference. The objective of this analysis was to study the common and unique responses of cell lines producing different protein products. This analysis showed enrichment and transient upregulation of mRNAs involved in ER stress, the UPR, and oxidative protein folding and processing in both protein producers. Analysis of temporal differential expression profiles led to the identification of novel engineering targets.
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Project description:RNA-Seq of roseoflavin producer Streptomyces davaonensis reveals transcription of unusual high number of riboflavin biosynthetic genes (rib genes) in exponential and stationary growth phase. In this study mRNA from three biological replicates of Streptomyces davaonensis harvested in exp. (after 18 h of growth) and stationary growth phase (after 48 h of growth) were sequenced after Illumina Ribozero treatment via Illumina TruSeq stranded mRNA libs on Illumina HiSeq1500. Moreover primary 5′-end-enriched cDNA libraries were prepared according to Peifer-Sancar et al. (2013) and sequenced on Illumina MiSeq system.
2020-01-31 | E-MTAB-8679 | biostudies-arrayexpress
Project description:To explore gene expression and search for the ansamitocin resistant genes during fermentation, total RNA of the ansmitocin high producer NXJ-24 and the wildtype strain ATCC31280 were extracted and sequenced. The gene expression values from day 1 to day 5 of NXJ-24 and day 5 of ATCC31280 were compared. 6 genes were considered most likely to be the ansamitocin transporter genes.
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