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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
The role of DNA minor groove deformation in specific recognition of DNA by proteins
 Faltejsková, Kateřina ; Vondrášek, Jiří (advisor) ; Lepšík, Martin (referee)
The specific recognition of the DNA is crucial for the correct functioning of the cell. Although its mechanisms are extensively studied, the actual process is not yet fully understood, partly due to the variance observed in readout mechanisms so far. In this work, a particular type of specific recognition is examined: the shape readout in the DNA minor groove. Based on a sta- tistical analysis of three-dimensional structures of protein-DNA complexes acquired from the Protein Data Bank, I propose a previously unrecorded readout mechanism of widened minor grooves by hydrophobic amino acids. In addition, the effect of DNA sequence on the topography of the contacted locus, the preferred secondary structures and the interaction between the protein and DNA are explored, as well as the relative information amount of examined features concerning the DNA deformation. 1
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Study of the interaction between DNA and transcription factors using mass spectrometry.
 Slavata, Lukáš ; Man, Petr (advisor) ; Obšil, Tomáš (referee)
Transcription factors play crucial regulatory role within the cell and the entire multicellular organism. The important factor is its ability to interact with other regulatory proteins and DNA. Despite the fact that a large part of the interaction network is already documented, detailed information on the structure and dynamics of protein-protein and protein-DNA complexes is still scarce. In this thesis we focused on the possibility of studying conformational changes given by the transcription factor-DNA complex formation using the methods of structural mass spectrometry: hydrogen/deuterium exchange and chemical crosslinking. As a model, we chose a transcription factor FOXO4 which DNA binding domain is structurally well characterized both in free form and in the complex with DNA.
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