Abstract
The recent advances in computational abilities, such as the enormous speed-ups provided by GPU computing, allow for large scale computational studies of RNA molecules at an atomic level of detail. As RNA molecules are known to adopt multiple conformations with comparable energies, but different two-dimensional structures, all-atom models are necessary to better describe the structural ensembles for RNA molecules. This point is important because different conformations can exhibit different functions, and their regulation or mis-regulation is linked to a number of diseases. Problematically, the energy barriers between different conformational ensembles are high, resulting in long time scales for interensemble transitions. The computational potential energy landscape framework was designed to overcome this problem of broken ergodicity by use of geometry optimization. Here, we describe the algorithms used in the energy landscape explorations with the OPTIM and PATHSAMPLE programs, and how they are used in biomolecular simulations. We present a recent case study of the 5′-hairpin of RNA 7SK to illustrate how the method can be applied to interpret experimental results, and to obtain a detailed description of molecular properties.
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Notes
- 1.
Formally described as a Hessian-index 1 saddle point, that is, there is one unique imaginary normal mode frequency.)
- 2.
The use of AMBER requires an AMBER license.
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Röder, K., Pasquali, S. (2021). RNA Modeling with the Computational Energy Landscape Framework. In: Ponchon, L. (eds) RNA Scaffolds. Methods in Molecular Biology, vol 2323. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-1499-0_5
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