Inferring Parameters for an Elementary Step Model of DNA Structure Kinetics with Locally Context-Dependent Arrhenius Rates

Inferring Parameters for an Elementary Step Model of DNA Structure Kinetics with Locally Context-Dependent Arrhenius Rates
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推断具有局部上下文相关阿伦尼乌斯速率的 DNA 结构动力学基本步骤模型的参数

DOI:
10.1007/978-3-319-66799-7_12
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发表时间:
2017
期刊:
Lecture notes in computer science
影响因子:
--
通讯作者:
Winfree, Erik
Winfree, Erik
中科院分区:
--
文献类型:
--
作者:
Zolaktaf, Sedigheh;Dannenberg, Frits;Rudelis, Xander;Condon, Anne;Schaeffer, Joseph M;Thachuk, Chris;Winfree, Erik

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Models of nucleic acid thermal stability are calibrated to a wide range of experimental observations, and typically predict equilibrium probabilities of nucleic acid secondary structures with reasonable accuracy. By comparison, a similar calibration and evaluation of nucleic acid kinetic models to a broad range of measurements has not been attempted so far. We introduce an Arrhenius model of interacting nucleic acid kinetics that relates the activation energy of a state transition with the immediate local environment of the affected base pair. Our model can be used in stochastic simulations to estimate kinetic properties and is consistent with existing thermodynamic models. We infer parameters for our model using an ensemble Markov chain Monte Carlo (MCMC) approach on a training dataset with 320 kinetic measurements of hairpin closing and opening, helix association and dissociation, bubble closing and toehold-mediated strand exchange. Our new model surpasses the performance of the previously established Metropolis model both on the training set and on a testing set of size 56 composed of toehold-mediated 3-way strand displacement with mismatches and hairpin opening and closing rates: reaction rates are predicted to within a factor of three forandof reactions for the training and testing sets, respectively.
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