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Protein radical footprinting as a tool for protein therapeutcs validation.
Binar, Michal ; Novák, Petr (advisor) ; Ječmen, Tomáš (referee)
Mass spectrometry techniques are very important and useful tool in studying of protein structure. One of these techniques is the covalent labeling of proteins. The covalent labeling can be used for determination of the accessibility of protein surface and their dynamics in general. Although a lot of reagents have already been developer for this method, most of them are limited by their ability to selectively react with only some of amino acids, mostly lysine, arginine or tyrosine, and non-selective methods such as fast photochemical oxidation of proteins are very demanding and costly. Therefore, there is still a endeavor to develop new methods of covalent labeling. This new method could be trifluoromethylation, which is increasingly used in the modification of organic molecules, and whose potential we have decided to study. In this work we used a new group of formally electrophilic agents, which is formed on the basis of a cyclic hypervalent iodide nucleus. This group so-called Togni reagents was used as a tool for radical protein labeling. Since the structure was well characterized by X-ray, NMR and MS, the human carbonic anhydrase has been selected as a model protein. The modified protein was analyzed by a bottom up approach using a combination of liquid chromatography and high resolution tandem...
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Protein radical footprinting as a tool for protein therapeutcs validation.
Binar, Michal ; Novák, Petr (advisor) ; Ječmen, Tomáš (referee)
Mass spectrometry techniques are very important and useful tool in studying of protein structure. One of these techniques is the covalent labeling of proteins. The covalent labeling can be used for determination of the accessibility of protein surface and their dynamics in general. Although a lot of reagents have already been developer for this method, most of them are limited by their ability to selectively react with only some of amino acids, mostly lysine, arginine or tyrosine, and non-selective methods such as fast photochemical oxidation of proteins are very demanding and costly. Therefore, there is still a endeavor to develop new methods of covalent labeling. This new method could be trifluoromethylation, which is increasingly used in the modification of organic molecules, and whose potential we have decided to study. In this work we used a new group of formally electrophilic agents, which is formed on the basis of a cyclic hypervalent iodide nucleus. This group so-called Togni reagents was used as a tool for radical protein labeling. Since the structure was well characterized by X-ray, NMR and MS, the human carbonic anhydrase has been selected as a model protein. The modified protein was analyzed by a bottom up approach using a combination of liquid chromatography and high resolution tandem...
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