National Repository of Grey Literature 6 records found  Search took 0.00 seconds. 
EF-Tu PROTEIN DOMAINS Functions and Thermostability
Šanderová, Hana ; Jonák, Jiří (advisor) ; Pichová, Iva (referee) ; Mikulík, Karel (referee)
6 % The bacterial elongation factor Tu (EF-Tu) has been extensively studied for decades as it plays a key role in protein biosynthesis. It is a model, multifunctional GTP-protein. This protein is also in the centre of interest as a possible target for new antibiotics. Moreover, the high homology in structure and function makes EF-Tu proteins suitable for the studies of evolutionary relationships between organisms and for elucidation of the structural features of adaptation to various living conditions. Furthermore, since all known EF-Tu proteins are composed of three distinct domains, they can also serve as suitable models for the understanding of domain organization in proteins. One of the main research projects of the Department of Gene Expression at the Institute of Molecular Genetics AS CR, where I did my PhD studies, was the study of the primary structure, transcription regulation and functions of bacterial elongation factors Tu from Gram positive thermophilic bacterium Bacillus stearothermophilus and from Gram negative mesophilic bacterium Escherichia coli. In this work, we focused on the structure-function relationships between EF-Tu proteins and their domains. The domain effect had been before our studies tested mainly by truncated EF-Tu forms lacking one or two domains. In contrast, we decided to...
Struktura a funkce tmRNA u streptomycet
Bobek, Jan ; Palečková, Petra ; Mikulík, Karel
The functional trans-translation system is important to allow survival of antibiotic producing microorganism under unfavourable conditions. The ssrA genes from S. coelicolor, S. collinus, S. aureofaciens and S. griseus were amplified and subjected to sequence analysis. To investigate the role of tmRNA in streptomycetes we have examined the level of tmRNA during the growth and differentiation under various physiological conditions
Aktivace translačního systému v průběhu buněčné diferenciace streptomycet
Bobek, Jan ; Palečková, Petra ; Vohradský, Jiří ; Mikulík, Karel
Synchronously germinating spores of S. granaticolor were used to study the activation of translational system and expression of proteins. Proteomic approach was used to gain more information on expression of proteins during germination on two types of media differing in ability of cells to produce antibiotic granaticin. The requirement of functional trans-translational system for reactivation of translation in S. aureofaciens exposed to unfavourable conditions was examined. Abundance of tmRNA is connected with changes in the rate of translation and with the accumulation of tetracycline. Our data indicate that trans-translation could be involved in self-defence against antibiotics synthesized
Struktura a funkce tmRNA kontrolující translaci u streptomycet
Bobek, Jan ; Palečková, Petra ; Mikulík, Karel
The functional trans-translation system is important to allow survival of antibiotic producing microorganism under unfavourable conditions. The ssrA genes from S. coelicolor, S. collinus, S. aureofaciens and S. griseus were amplified and subjected to sequence analysis. To investigate the role of tmRNA in streptomycetes we have examined the level of tmRNA during the growth and differentiation under various physiological conditions

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