Dataset Information


Types I GT1, II Me49, III CTGara strains - tachyzoite and Compound 1

ABSTRACT: Previous studies suggested that specific bradyzoite genes were differentially expressed in the three major lineages common to North America and Europe (Radke et al., 2006). In order to determine if these differences extended to the global transcriptome, we characterized whole-cell mRNA levels in both tachyzoite and bradyzoite populations from three primary strain isolates differentiated in vitro. It is well understood in the field that long passage history is associated with the loss of developmental competence (Frenkel et al., 1976). Therefore, the Type I-GT1, Type II-Me49B7 and Type III-CTG strains studied here were maintained at < 20 cell culture passages from the oocyst stage and are capable of completing both intermediate and definitive host life cycles. These experiments used newly constructed Affymetrix GeneChips that include probe sets for ~8000 genes, and we assessed the induction of bradyzoite genes using a strong inducer of bradyzoite differentiation, Compound 1 (Radke et al., 2006). Both tachyzoite and induced (Compound 1/48hrs - bradyzoite) RNA for strains representing the three major lineages of Toxoplasma gondii were hybridized .

ORGANISM(S): Toxoplasma gondii  

SUBMITTER: Michael W White   Michael S Behnke  Michael Sean Behnke 

PROVIDER: E-GEOD-16037 | ArrayExpress | 2010-05-19



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The transcription of bradyzoite genes in Toxoplasma gondii is controlled by autonomous promoter elements.

Behnke Michael S MS   Radke Josh B JB   Smith Aaron T AT   Sullivan William J WJ   White Michael W MW  

Molecular microbiology 20080421 6

Experimental evidence suggests that apicomplexan parasites possess bipartite promoters with basal and regulated cis-elements similar to other eukaryotes. Using a dual luciferase model adapted for recombinational cloning and use in Toxoplasma gondii, we show that genomic regions flanking 16 parasite genes, which encompass examples of constitutive and tachyzoite- and bradyzoite-specific genes, are able to reproduce the appropriate developmental stage expression in a transient luciferase assay. Map  ...[more]

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