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Molecular dynamics simulations of complexes consisting of proteins and nucleic acids
Zíma, Vlastimil ; Barvík, Ivan (advisor) ; Jungwirth, Pavel (referee)
At first, numerical integration algorithms was studied. Main objective was a study of active sites of HCV and HIV polymerases in complexes with a natural substrate and in complexes where an approaching nucleosidetriphosphate was replaced with inhibitors (S)-HMPMGpp and (S)-HMPMApp respectively. Further, an ABF method was used to obtain free energy profiles of water and methane molecules passing through a boundary between water and vacuum. Finally, the same method was used to obtain free energy profiles of water, methane and guanosine molecules passing through a lipid bilayer.
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Molecular dynamics simulations of ion channel TRPA1
Zíma, Vlastimil ; Barvík, Ivan (advisor) ; Ettrich, Rüdiger (referee) ; Martínek, Václav (referee)
Title: Molecular dynamics simulations of ion channel TRPA1 Author: Mgr. Vlastimil Zíma Institute: Institute of Physics of Charles University Supervisor: RNDr. Ivan Barvík, PhD., Institute of Physics of Charles Uni- versity Abstract: The ion channel TRPA1 is one of the members of the transient receptor potential channel family. These channels have recently been an im- portant objective of research, because they play important roles in various cellular processes and organismic mechanisms. Especially they are involved in most of the senses. We focused mainly on the TRPA1 ion channel due to its involvement in the pain sensation in humans. Because the molecular mechanisms behind the gating of this channel are not fully understood, their description is a key for a design of new analgesics targeting this channel. We used a homology modeling and molecular dynamics simulations in conjunc- tion with electrophysiological experiments to provide a valuable new insight into the channel mechanisms. We contributed by describing of a putative binding site for calcium ions. Further, many functionally important amino acids were found in the S1-S4 transmembrane domain. Keywords: voltage-gated ion channel, TRPA1 channel, molecular dynamics, homology modeling 1
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Molecular dynamics simulations of complexes consisting of proteins and nucleic acids
Zíma, Vlastimil ; Barvík, Ivan (advisor) ; Jungwirth, Pavel (referee)
At first, numerical integration algorithms was studied. Main objective was a study of active sites of HCV and HIV polymerases in complexes with a natural substrate and in complexes where an approaching nucleosidetriphosphate was replaced with inhibitors (S)-HMPMGpp and (S)-HMPMApp respectively. Further, an ABF method was used to obtain free energy profiles of water and methane molecules passing through a boundary between water and vacuum. Finally, the same method was used to obtain free energy profiles of water, methane and guanosine molecules passing through a lipid bilayer.
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