Dataset Information


Transcriptome changes in Streptococcus agalactiae due to deletion of both the CiaR and LiaR Transcriptional Regulators

ABSTRACT: The CiaRH and LiaFSR two-component regulatory systems in Streptococcus agalactiae (Group B Streptococcus, GBS) are essential mediators of the organism s response to biologically important sources of environmental stress, and positive regulators of GBS virulence. Transcriptional profiling of CiaR mutant GBS and LiaR mutant GBS reveals that LiaR is positively-regulated by CiaR, and the individual mutant transcriptomes share a number of commonly-regulated genes. To determine the GBS response to loss of both of these key regulatory systems, we constructed a GBS mutant strain with non-polar deletions in both ciaR and liaR, and performed transcriptional profiling using DNA microarray analysis, comparing wild-type GBS to CiaR/LiaR double mutant GBS under non-stressed conditions. Two separate RNA samples were extracted for each condition. One flip-dye replicate (2 hybridizations) was obtained for each pair of RNA samples for 4 hybridizations total.

ORGANISM(S): Streptococcus agalactiae  

SUBMITTER: Herve Tettelin   Nadeeza Ishmael  Karen M Puopolo  Julie C Dunning Hotopp  David C Klinzing 

PROVIDER: E-GEOD-14572 | ArrayExpress | 2012-11-18



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