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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
BIOPHYSICAL AND FUNCTIONAL CHARACTERIZATION OF DDI1-LIKE ASPARTIC PROTEASES INVOLVED IN REPLICATION STRESS RESPONSE
 Svoboda, Michal ; Konvalinka, Jan (advisor) ; Obšil, Tomáš (referee) ; Čermák, Lukáš (referee)
Accurate, timely replication of a DNA molecule is a pivotal moment in the life cycle of every living organism. Any temporal or spatial defect putting the fine-tuned replication machinery off balance causes the so-called replication stress. As the replication machinery consists mainly of enzymes and other proteins, it is not surprising that many of the obstacles most severely blocking the replication machinery progress are of protein origin. Therefore, specialized proteases responsible for relieving replication stress matured during evolution. However, neither the full repertoire of proteolytic enzymes and their particular substrates taking place in countering the DNA replication stress nor detailed molecular mechanisms involved remain unknown. This thesis describes how conserved putative aspartic proteases of the Ddi1-like family engage in countering DNA replication stress via a proteolysis dependent mechanism. We structurally and biophysically characterized yeast and human members of the Ddi1-like family, explored their interactions with ubiquitin and polyubiquitin chains, and identified hypersensitivity to DNA replication inhibitor hydroxyurea in a yeast strain double deleted for DDI1 gene together with a DNA dependent metalloprotease WSS1. Detailed analysis of the DDI1 role in hydroxyurea...
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Development of web-based interface for visualization of protein-ligand interaction sites and their conservation
 Jendele, Lukáš ; Hoksza, David (advisor) ; Škoda, Petr (referee)
Proteins are fundamental building blocks of all living organisms. They perform their function by binding to other molecules. This thesis deals with interactions between proteins and small molecules (so called ligands) because most of the currently used drugs are small molecules. While there are several tools that can predict these interactions, they are almost none for their visualization. Thus, we built a new visualization website by combining several protein visualizers toge- ther. Since evolutionary homology correlates with binding sites, our web interface also displays homology for comparison. We developed several ways how to calcu- late homology, and used it to improve detection of protein-ligand binding sites in our experiments. Here we present PrankWeb, a modern web application for structure and sequence visualization of a protein and its protein-ligand binding sites as well as evolutionary homology. We hope that it will provide a quick and convenient way for scientists to analyze proteins. 1
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