Efficient Parameter Estimation for DNA Kinetics Modeled as Continuous-Time Markov Chains
Efficient Parameter Estimation for DNA Kinetics Modeled as Continuous-Time Markov Chains
复制标题
作为连续时间马尔可夫链建模的 DNA 动力学的有效参数估计
DOI:
10.1007/978-3-030-26807-7_5
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Condon, A
中科院分区:
文献类型:
--
作者:
Zolaktaf, S;Dannenberg, F;Winfree, E;Bouchard-Côté, A;Schmidt, M;Condon, A
Nucleic acid kinetic simulators aim to predict the kinetics of interacting nucleic acid strands. Many simulators model the kinetics of interacting nucleic acid strands as continuous-time Markov chains (CTMCs). States of the CTMCs represent a collection of secondary structures, and transitions between the states correspond to the forming or breaking of base pairs and are determined by a nucleic acid kinetic model. The number of states these CTMCs can form may be exponentially large in the length of the strands, making two important tasks challenging, namely, mean first passage time (MFPT) estimation and parameter estimation for kinetic models based on MFPTs. Gillespie’s stochastic simulation algorithm (SSA) is widely used to analyze nucleic acid folding kinetics, but could be computationally expensive for reactions whose CTMC has a large state space or for slow reactions. It could also be expensive for arbitrary parameter sets that occur in parameter estimation. Our work addresses these two challenging tasks, in the full state space of all non-pseudoknotted secondary structures of each reaction. In the first task, we show how to use a reduced variance stochastic simulation algorithm (RVSSA), which is adapted from SSA, to estimate the MFPT of a reaction’s CTMC. In the second task, we estimate model parameters based on MFPTs. To this end, first, we show how to use a generalized method of moments (GMM) approach, where we minimize a squared norm of moment functions that we formulate based on experimental and estimated MFPTs. Second, to speed up parameter estimation, we introduce a fixed path ensemble inference (FPEI) approach, that we adapt from RVSSA. We implement and evaluate RVSSA and FPEI using the Multistrand kinetic simulator. In our experiments on a dataset of DNA reactions, FPEI speeds up parameter estimation compared to inference using SSA, by more than a factor of three for slow reactions. Also, for reactions with large state spaces, it speeds up parameter estimation by more than a factor of two.
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DOI:
--
发表时间:
2008
期刊:
--
影响因子:
--
作者:
A. Doucet;A. M. Johansen
通讯作者:
A. Doucet;A. M. Johansen
DOI:
10.1007/978-3-319-66799-7_12
发表时间:
2017
期刊:
Lecture notes in computer science
影响因子:
--
作者:
Zolaktaf, Sedigheh;Dannenberg, Frits;Rudelis, Xander;Condon, Anne;Schaeffer, Joseph M;Thachuk, Chris;Winfree, Erik
通讯作者:
Winfree, Erik
DOI:
10.1007/978-1-4939-6433-8_10
发表时间:
2016-01-01
期刊:
RNA STRUCTURE DETERMINATION
影响因子:
--
作者:
Xu, Zhenjiang Zech;Mathews, David H.
通讯作者:
Mathews, David H.
影响因子:
14.9
作者:
Y. Suhov;M. Kelbert
通讯作者:
M. Kelbert
影响因子:
2.2
作者:
Georgoulas A;Hillston J;Sanguinetti G
通讯作者:
Sanguinetti G