Szantai-Kis, Daniel Miklos

Email Address
ORCID
Disciplines
Research Projects
Organizational Units
Position
Introduction
Research Interests

Filters

1
20191
1
1
Reset filters

Settings

Search Results

Now showing 1 - 1 of 1
  • Publication
    Development Of Thioamides As Protein Probes
    (2019-01-01) Szantai-Kis, Daniel Miklos
    Thioamides have been used for various applications with small molecules and peptides, including as protease sensors, fluorescence quenching probes, folding probes, and handles for site-specific chemical modification. However, their use in proteins has been limited due to cumbersome incorporation through semi-synthesis, as well as their unknown effects on protein structure. In this work, I address these issues from multiple perspectives. I present improvements for the synthesis of thioamide-containing peptides, which are needed for semi-synthesis. I also investigate the effects that thioamide substitutions have on tertiary structure in a model protein and show that based on thermal denaturation experiments, the position of thioamide substitution can have a significant impact on the tertiary fold. Furthermore, I demonstrate a new semi-synthetic strategy to obtain mg quantities of a thioamide-containing protein that will enable structural investigation by Nuclear Magnetic Resonance spectroscopy and X-Ray crystallography. Finally, I describe my attempts at the genetic incorporation of thioamides using a combination of unnatural amino acid mutagenesis and amber suppression. While the last part was not successful, the efforts to improve semi-synthesis of thioamides will enable the use of thioamides as probes in proteins in a similar fashion as they have been used previously in peptides.