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Transcriptional profiling of E. coli cultures exposed to tellurite 0.5 µg/ml


ABSTRACT: E. coli cultures were exposed to tellurite 0.5 µg/ml during 15 min. Total RNA was extracted and cDNA labeled probes were generated by reverse transcription using Alexa 555 and Alexa 647 fluorophores. These probes were used to hybridize genomic slides containing genomic arrays to determine global transcriptional changes. Two-conditions experiment, antibacterial vs. Untreated control cells. Biological replicates: 2 control, 2 toxicants exposed cells, independently grown and harvested. One replicate per array. Dye swap conditions.

ORGANISM(S): Escherichia coli K-12

SUBMITTER: David Loyola 

PROVIDER: E-GEOD-58176 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Global transcriptomic analysis uncovers a switch to anaerobic metabolism in tellurite-exposed Escherichia coli.

Molina-Quiroz Roberto C RC   Loyola David E DE   Díaz-Vásquez Waldo A WA   Arenas Felipe A FA   Urzúa Ulises U   Pérez-Donoso José M JM   Vásquez Claudio C CC  

Research in microbiology 20140715 7


Tellurite (TeO3(2-)) is harmful for most microorganisms, especially Gram-negative bacteria. Even though tellurite toxicity involves a number of individual aspects, including oxidative stress, malfunctioning of metabolic enzymes and a drop in the reduced thiol pool, among others, the general mechanism of toxicity is rather complex and not completely understood to date. This work focused on DNA microarray analysis to evaluate the Escherichia coli global transcriptomic response when exposed to the  ...[more]

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