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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Analysis of gene regulatory regions in the genome of oxymonad Monocercomonoides
 Brzoň, Ondřej ; Hampl, Vladimír (advisor) ; Vopálenský, Václav (referee)
iv Abstract Regulation of gene expression is a key ability of every single cell in its development, differentiation and homeostasis. On the other hand, rather sparse amount of information is available for protists and our understanding of regulation of gene expression in eukaryotes is limited to a few model organisms. Our research is aimed at oxymonads, poorly studied group of anaerobic protists, which inhabit digestive tract of some animals. In this study we focus on the genus Monocercomonoides. Gene expression is modulated at multiple levels by many mechanisms. This thesis is focused on structure of promoter regions, 5' untranslated regions and basal transcription and translation initiation factors. Our results are compared to the closest studied relatives of Monocercomonoides - Trichomonas vaginalis and Giardia intestinalis. We have identified several conserved motifs in promoter regions of Monocercomonoides, including TATA box and TATA-like motif. These motifs potentially play a role in the transcription regulation. 5' untranslated regions are relatively short (typically 20 - 30 nucleotides) and GC content in these regions is low compared to model organisms. In selected genes, the quality of the automatic prediction of UTR was verified by RACE. We have annotated sets of basic transcription (23 proteins)...
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Regulation of gene expression in anaerobic parasitic protist and practical application of knowledge
 Brzoň, Ondřej ; Zubáčová, Zuzana (advisor) ; Horváthová, Lenka (referee)
Because of its importance for every single cell, regulation of gene expression is often studied at all levels today. On the other hand, rather sparse amount of information is available for protists and our understanding of their gene expression is nearly limited to several model organisms. Three anaerobic human parasites have been studied in details: Trichomonas vaginalis, Entamoeba histolytica and Giardia intestinalis. Most recently, some others anaerobic protists (e.g. Entamoeba invadens or some species of Spironucleus genus) have been researched as well. This work is focused on the structure of promoter regions in protein coding genes and application of this knowledge in construction of transfection systems as one of the most effective and powerful tools in molecular and cell biology.
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