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Differential expression of small RNAs from Burkholderia thailandensis in response to varying environmental and stress conditions

Journal Article · · BMC Genomics
 [1];  [2];  [2];  [2];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Bioscience Division; DOE/OSTI
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Bioscience Division
Background: Bacterial small RNAs (sRNAs) regulate gene expression by base-pairing with downstream target mRNAs to attenuate translation of mRNA into protein at the post-transcriptional level. In response to specific environmental changes, sRNAs can modulate the expression levels of target genes, thus enabling adaptation of cellular physiology. Results: We profiled sRNA expression in the Gram-negative bacteria Burkholderia thailandensis cultured under 54 distinct growth conditions using a Burkholderia-specific microarray that contains probe sets to all intergenic regions greater than 90 bases. We identified 38 novel sRNAs and performed experimental validation on five sRNAs that play a role in adaptation of Burkholderia to cell stressors. In particular, the trans-encoded BTH_s1 and s39 exhibited differential expression profiles dependent on growth phase and cell stimuli, such as antibiotics and serum. Furthermore, knockdown of the highly-expressed BTH_s39 by antisense transcripts reduced B. thailandensis cell growth and attenuated host immune response upon infection, indicating that BTH_s39 functions in bacterial metabolism and adaptation to the host. In addition, expression of cis-encoded BTH_s13 and s19 found in the 5' untranslated regions of their cognate genes correlated with tight regulation of gene transcript levels. This sRNA-mediated downregulation of gene expression may be a conserved mechanism of post-transcriptional gene dosage control. Conclusions: These studies provide a broad analysis of differential Burkholderia sRNA expression profiles and illustrate the complexity of bacterial gene regulation in response to different environmental stress conditions.
Research Organization:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
Grant/Contract Number:
FG02-00ER41132
OSTI ID:
1626434
Journal Information:
BMC Genomics, Journal Name: BMC Genomics Journal Issue: 1 Vol. 15; ISSN 1471-2164
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Identification of sRNA mediated responses to nutrient depletion in Burkholderia pseudomallei journal December 2017
Genome-Wide Identification of Small RNAs in Bifidobacterium animalis subsp. lactis KLDS 2.0603 and Their Regulation Role in the Adaption to Gastrointestinal Environment journal February 2015
Functional and Structural Analysis of a Highly-Expressed Yersinia pestis Small RNA following Infection of Cultured Macrophages journal December 2016
Non-coding RNA regulation in pathogenic bacteria located inside eukaryotic cells journal November 2014
A Genome-Wide Prediction and Identification of Intergenic Small RNAs by Comparative Analysis in Mesorhizobium huakuii 7653R journal September 2017
Identification of small RNAs abundant in Burkholderia cenocepacia biofilms reveal putative regulators with a potential role in carbon and iron metabolism journal November 2017
Grouper: graph-based clustering and annotation for improved de novo transcriptome analysis journal May 2018
Evolution of plasticity in production and transgenerational inheritance of small RNAs under dynamic environmental conditions journal August 2019
Low iron-induced small RNA BrrF regulates central metabolism and oxidative stress responses in Burkholderia cenocepacia journal November 2019
Evolution of plasticity in production and transgenerational inheritance of small RNAs under dynamic environmental conditions journal May 2021

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