Ontology highlight
ABSTRACT:
PROVIDER: PRJNA642834 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12108221_1.fastq.gz | Fastqsanger.gz | |||
| SRR12108221_2.fastq.gz | Fastqsanger.gz | |||
| SRR12108222_1.fastq.gz | Fastqsanger.gz | |||
| SRR12108222_2.fastq.gz | Fastqsanger.gz | |||
| SRR12108223_1.fastq.gz | Fastqsanger.gz |
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Project description:Pseudomonas alloputida KT2440 (previously misclassified as P. putida KT2440 based on 16S rRNA gene homology) has emerged as an ideal host strain for plan t biomass valorization. However, P. alloputida KT2440 is unable to natively utilize abundant pentose sugars (e.g., xylose and arabinose) in hydrolysate streams, which may account for up to 25% of lignocellulosic biomass. In the last decades, microbes have been engineered to utilize the pentose sugars. However, most of the engineered strains were either slow-growing or displayed phenotypes that could not be replicated. In this work, we successfully isolated five Pseudomonas species with the native capability to utilize glucose, xylose and p-coumarate as a sole carbon source. These isolates were in two clusters; one set of isolates (M2 and M5) and the second set of isolates (BP6 and BP7) showed 85.6% and 96.2% ANI, respectively, to P. alloputida KT24440. BP8 showed 84.6% ANI to P. putida KT2440 and does not belong to any neighboring type strains indicating a new species. Notably, the isolates showed robust growth solely on xylose and higher growth rates (m, 0.36-0.49 h-1) when compared to only known xylose-utilizing Pseudomonas taiwanenesis VLB120 (m, 0.28 h-1) as a control. Unexpectedly, among five isolates, M2 and M5 grew solely on arabinose as well. Comprehensive analysis of genomics, transcriptomics and proteomics revealed the isolates utilize xylose and arabinose via Weimberg pathway (xylD-xylX-xylA) and oxidative pathway (araD-araX-araA), respectively. Furthermore, a preliminary result demonstrated the production of flaviolin solely on xylose and arabinose in the isolate, showing noteworthy potential to be an alternative host for lignocellulosic feedstocks into valuable products. This is the first report on isolating Pseudomonas strains natively capable of utilizing all of the major carbon sources in lignocellulosic biomass, and leading to higher consumption of available substrates and therefore maximizing the product yield.
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Project description:Gene expression patterns of the plant colonizing bacterium,Pseudomonas putida KT2440 were evaluated as a function of growth in the Arabidopsis thaliana rhizosphere. Gene expression in rhizosphere grown P. putida cells was compared to gene expression in non-rhizosphere grown cells. Keywords: Gene expression
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Project description:Genome-wide scanning of gene expression by microarray techniques was successfully performed on RNA extracted from a sterilized soil inoculated with Pseudomonas putida KT2440/pSL1, which contains a chloroaromatic degrading plasmid, in the presence or absence of 3-chlorobenzoic acid (3CB). The genes showing significant changes in their expression in both triplicate microarray analyses using amplified RNA and single microarray analysis using unamplified RNA were investigated. Pathway analysis revealed that the benzoate degradation pathway underwent the most significant changes following treatment with 3CB. Analysis based on categorization of differentially expressed genes against 3CB revealed new findings about the cellular responses of the bacteria to 3CB, including upregulation of the genes specifically involved in transport of 3CB, and induction of a K+/H+ antiporter complex, an universal stress protein, two cytochrome P450 proteins and an efflux transporter. Downregulated expression of some genes involved in carbon metabolism and the genes belong to a prophage in the presence of 3CB was observed. This study demonstrated the applicability of the method of soil RNA extraction for microarray analysis through a proof-of-concept experiment using a sterilized soil inoculated with Pseudomonas putida KT2440/pSL1. A study using total RNA extracted from soil cultures of Pseudomonas putida KT2440/pSL1. Each chip measures the expression level of 5,341 genes from the Pseudomonas putida KT2440 genome with two sets of six 60-mer probes per gene.
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Project description:The completely sequenced catabolic plasmid pCAR1 of Pseudomonas resinovorans CA10 confers the ability to degrade carbazole upon the recipient strain Pseudomonas putida KT2440. To study the coordinated expression of pCAR1 with its host chromosome, transcriptome of the transconjugant strain KT2440(pCAR1) was analyzed at growth with carbazole as the sole carbon source compared to succinate as an alternative carbon source. Next, horizontal gene transfer of a plasmid potentially alters the transcriptome of its host chromosome. Transcriptome of the transconjugant strain KT2440(pCAR1) was compared to the parental strain KT2440 at the same growth conditions. Furthermore, pCAR1 encodes a possible global regulator designated ORF70, which belongs to the MvaT family of H-NS-like nucleoid-associated proteins in Pseudomonas. To investigate the regulon under the control of ORF70, transcriptome of KT2440(pCAR1deltaORF70) was compared to the parental strain KT2440(pCAR1) at the same growth conditions. Keywords: Comparative transcriptome analysis
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