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CcpA mutant compared to D39 wild-type in Streptococcus pneumoniae in CDM + GLucose at transition-phase of growth (TS)

ABSTRACT: Comparison of Streptococcus pneumoniae D39 ccpA mutant compared to D39 wild type in CDM with glucose as sole carbon source to define the regulon of carbon catabolite control protein CcpA under this condition Details described in Carvalho SM, Kloosterman TG, Neves AR, Kuipers OP. CcpA Ensures Optimal Metabolic Fitness of Streptococcus pneumoniae. Plos One 2011 One condition design comparision of two strains including a dye swap

ORGANISM(S): Streptococcus pneumoniae D39

SUBMITTER: Anne Jong

PROVIDER: E-GEOD-31816 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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CcpA Ensures Optimal Metabolic Fitness of Streptococcus pneumoniae

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Project description:The maltose regulon (mal regulon) has previously been shown to consist of the mal gene cluster (malQP, malXCD and malAR operons) in Streptococcus pneumoniae. In this study, we have further elucidated the complete mal regulon in S. pneumoniae D39 using microarray analyses and β-galactosidase assays. In addition to the mal gene cluster, the complete mal regulon of S. pneumoniae D39 consists of a pullulanase (PulA), a glucosidase (DexB), a glucokinase (RokB), a PTS component (PtsG) and an amylase (AmyA2). Our microarray studies and β-galactosidase assays further showed that the LacI-family transcriptional regulator MalR represses the expression of the mal regulon in the absence of maltose. Furthermore, the role of the pleiotropic transcriptional regulator CcpA in the regulation of the mal regulon in the presence of maltose was also explored. Our microarray analysis with a ΔccpA strain showed that CcpA only represses the expression of the malXCD operon and the pulA gene in the presence of maltose. Comparison of the Streptococcus pneumoniae D39 wild type in MM17 (0.5 % (w/v) Maltose + M17) medium compared to GM17 (0.5 % (w/v) Glucose + M17) One condition design comparision of two strains including a dye swap

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