Comparison of the Streptococcus pneumoniae D39 malR Mutant compared to D39 wild-type

ABSTRACT: 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 malR mutant compared to D39 wild type in GM17 (0.5 % (w/v) Glucose + M17) medium One condition design comparision of two strains including a dye swap

ORGANISM(S): Streptococcus pneumoniae D39

SUBMITTER: Sulman Shafeeq 

PROVIDER: E-GEOD-65548 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress