A Comment on the Reweighting Method for Accelerated Molecular Dynamics Simulations

2015 ◽  
Vol 11 (6) ◽  
pp. 2395-2397 ◽  
Author(s):  
Zhifeng Jing ◽  
Huai Sun
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Accelerated Molecular Dynamics ◽  
Dynamics Simulations

scholarly journals Improved Reweighting of Accelerated Molecular Dynamics Simulations for Free Energy Calculation

2014 ◽  
Vol 10 (7) ◽  
pp. 2677-2689 ◽  
Author(s):  
Yinglong Miao ◽  
William Sinko ◽  
Levi Pierce ◽  
Denis Bucher ◽  
Ross C. Walker ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Free Energy ◽  
Molecular Dynamics Simulations ◽  
Free Energy Calculation ◽  
Energy Calculation ◽  
Accelerated Molecular Dynamics ◽  
Dynamics Simulations

scholarly journals Mechanism of allosteric activation of human mRNA cap methyltransferase (RNMT) by RAM: Insights from accelerated molecular dynamics simulations

2019 ◽  
Author(s):  
Juan A. Bueren-Calabuig ◽  
Marcus Bage ◽  
Victoria H. Cowling ◽  
Andrei V. Pisliakov
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Rna Polymerase Ii ◽  
Active Site ◽  
Allosteric Regulation ◽  
Dynamic Network ◽  
Binding Model ◽  
Accelerated Molecular Dynamics ◽  
Dynamics Simulations ◽  
First Time

ABSTRACTThe RNA guanine-7 methyltransferase (RNMT) in complex with RNMT-Activating Miniprotein (RAM) catalyses the formation of a N7-methylated guanosine cap structure on the 5’ end of nascent RNA polymerase II transcripts. The mRNA cap protects the transcript from exonucleases and recruits cap-binding complexes that mediate RNA processing, export and translation. By using microsecond standard and accelerated molecular dynamics simulations, we provide for the first time a detailed molecular mechanism of allosteric regulation of RNMT by RAM. We show that RAM selects the RNMT active site conformations that are optimal for binding of substrates (AdoMet and the cap), thus enhancing their affinity. Furthermore, our results strongly suggest the likely scenario in which the cap binding promotes the subsequent AdoMet binding, consistent with the previously suggested cooperative binding model. By employing the dynamic network and community analyses, we revealed the underlying long-range allosteric networks and paths that are crucial for allosteric regulation by RAM. Our findings complement and explain previous experimental data on RNMT activity. Moreover, this study provides the most complete description of the cap and AdoMet binding poses and interactions within the enzyme’s active site. This information is critical for the drug discovery efforts that consider RNMT as a promising anti-cancer target.

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