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Whole transcriptomic analysis of Novosphingobium tardaugens NBRC 16725 grown in estradiol raw sequence reads

ABSTRACT: Whole transcriptomic analysis of Novosphingobium tardaugens NBRC 16725 grown in estradiol raw sequence reads

PROVIDER: PRJEB39081 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR4296810_1.fastq.gz	Fastqsanger.gz
	ERR4296810_2.fastq.gz	Fastqsanger.gz
	ERR4296808_1.fastq.gz	Fastqsanger.gz
	ERR4296808_2.fastq.gz	Fastqsanger.gz
	ERR4296809_1.fastq.gz	Fastqsanger.gz

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Caenibius tardaugens NBRC 16725

Project description:Novosphingobium tardaugens NBRC 16725 genome sequencing project

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Caenibius tardaugens NBRC 16725

Project description:Whole transcriptomic analysis of Novosphingobium tardaugens NBRC 16725 grown in estradiol raw sequence reads

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Novosphingobium tardaugens NBRC 16725 genome sequencing and assembly

Project description:High quality whole genome sequence of Novosphingobium tardaugens NBRC 16725

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Caenibius tardaugens NBRC 16725 isolate:ARI-1

Project description:High quality whole genome sequence of the estradiol degrader strain Novosphingobium tardaugens NBRC 16725

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Caenibius tardaugens NBRC 16725

Project description:Whole transcriptomic analysis of Novosphingobium tardaugens NBRC 16725 grown in pyruvate raw sequence reads

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Caenibius tardaugens NBRC 16725

Project description:Whole transcriptomic analysis of Novosphingobium tardaugens NBRC 16725 grown in testosterone raw sequence reads

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Unraveling the 17β-Estradiol Degradation Pathway in <i>Novosphingobium tardaugens</i> NBRC 16725.

Project description:We have analyzed the catabolism of estrogens in Novosphingobium tardaugens NBRC 16725, which is able to use endocrine disruptors such as 17β-estradiol, estrone, and estriol as sole carbon and energy sources. A transcriptomic analysis enabled the identification of a cluster of catabolic genes (edc cluster) organized in two divergent operons that are involved in estrogen degradation. We have developed genetic tools for this estrogen-degrading bacterium, allowing us to delete by site-directed mutagenesis some of the genes of the edc cluster and complement them by using expression plasmids to better characterize their precise role in the estrogen catabolism. Based on these results, a catabolic pathway is proposed. The first enzyme of the pathway (17β-hydroxysteroid dehydrogenase) used to transform 17β-estradiol into estrone is encoded out of the cluster. A CYP450 encoded by the edcA gene performs the second metabolic step, i.e., the 4-hydroxylation of estrone in this strain. The edcB gene encodes a 4-hydroxyestrone-4,5-dioxygenase that opens ring A after 4-hydroxylation. The initial steps of the catabolism of estrogens and cholate proceed through different pathways. However, the degradation of estrogens converges with the degradation of testosterone in the final steps of the lower catabolic pathway used to degrade the common intermediate 3aα-H-4α(3'-propanoate)7a-β-methylhexahydro-1,5-indanedione (HIP). The TonB-dependent receptor protein EdcT appears to be involved in estrogen uptake, being the first time that this kind of proteins has been involved in steroid transport.

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High-Quality Whole-Genome Sequence of an Estradiol-Degrading Strain, Novosphingobium tardaugens NBRC 16725.

Project description:In this work we report the complete sequence and assembly of the estradiol-degrading bacterium Novosphingobium tardaugens NBRC 16725 genome into a single contig using the Pacific Biosciences RS II system.

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Caenibius tardaugens

Project description:Novosphingobium tardaugens overview

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Testosterone Degradative Pathway of Novosphingobium tardaugens.

Project description:In this work, we have shown that Novosphingobium tardaugens NBRC 16725 (strain ARI-1), a bacterial strain that was isolated due to its capacity to mineralize the estrogenic endocrine compound 17β-estradiol, is also able to mineralize testosterone, the androgenic endocrine compound. Using in silico analysis, we predicted a new putative steroid degradation (SD) gene cluster in strain ARI-1, which resembles genes involved in testosterone degradation in Comamonas testosteroni and other testosterone degrading bacteria like Actinobacteria (like Rhodococcus and Mycobacteria genera) although with significant differences in gene organization. A whole transcriptomic analysis of N. tardaugens revealed that testosterone produces a limited induction of the genes of the SD cluster that show a high basal expression in its absence. The 3β/17β-hydroxysteroid dehydrogenase involved in the first metabolic step of testosterone degradation was identified by using genetic and biochemical approaches. The construction of knockout mutant strains in the genes of the SD cluster together with in silico analyses suggests the existence of gene redundancy in the genome of N. tardaugens. This work will expand the knowledge about the metabolic pathways and biotransformation capabilities of a Gram-negative bacterium that could become a new model system in the bacterial steroid degradation field.

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