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Uncultured bacterium

ABSTRACT: Existence and diversity of myxobacteria in Chenghai Lake mud

PROVIDER: PRJNA89439 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR443364.fastq.gz	Fastqsanger.gz
	SRR443365.fastq.gz	Fastqsanger.gz
	SRR443796.fastq.gz	Fastqsanger.gz
	SRR443827.fastq.gz	Fastqsanger.gz

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Project description:Small non-coding RNAs (sRNAs) are essential in regulating gene expression during many biological processes. In myxobacteria, the gene pxr encodes for an sRNA known to block the activation of fruiting body development, an aggregative multicellular process triggered by starvation. However, a comprehensive list of potential targets of Pxr and whether these are indeed associated with development still needs to be determined. Here, we profiled the transcriptome of vegetative cells lacking pxr and obtained a list of genes affected by the absence of this sRNA. Interestingly, we found that the absence of pxr influences the expression of genes associated with metabolic processes in general. However, our experiment strengthened the association between pxr and aggregative development with more than half of the differentially expressed genes linked to fruiting body formation. By ours with previously published data, we identified critical factors of myxobacteria aggregative multicellularity as potential pxr targets combining. Moreover, our study supports the existence of additional not yet described genes relevant to fruiting body development that Pxr possibly controls. Among them, we identify pxrA, a novel gene encoding for a GNAT-acetyltransferase that we showed to be important to fruiting body development and associated with pxr expression. We additionally found that the altered expression of developmental genes caused by the absence of pxr correlates with a dramatic variation in the temporal dynamics of development, thus suggesting an important role of this sRNA in myxobacteria ecology.

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