Papers › Fixed-Parameter Tractable Sampling for RNA Design with Multiple Target Structures
Fixed-Parameter Tractable Sampling for RNA Design with Multiple Target Structures
Stefan Hammer, Yann Ponty, Wei Wang, Sebastian Will
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The design of multi-stable RNA molecules has important applications in biology, medicine, and biotechnology. Synthetic design approaches profit strongly from effective in-silico methods, which can tremendously impact their cost and feasibility. We revisit a central ingredient of most in-silico design methods: the sampling of sequences for the design of multi-target structures, possibly including pseudoknots. For this task, we present the efficient, tree decomposition-based algorithm. Our fixed parameter tractable approach is underpinned by establishing the P-hardness of uniform sampling. Modeling the problem as a constraint network, our program supports generic Boltzmann-weighted sampling for arbitrary additive RNA energy models; this enables the generation of RNA sequences meeting specific goals like expected free energies or \GCb-content. Finally, we empirically study general properties of the approach and generate biologically relevant multi-target Boltzmann-weighted designs for a common design benchmark. Generating seed sequences with our program, we demonstrate significant improvements over the previously best multi-target sampling strategy (uniform sampling).Our software is freely available at: https://github.com/yannponty/RNARedPrint .
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