Asymptotic distribution of motifs in a stochastic context-free grammar model of RNA folding.
Asymptotic distribution of motifs in a stochastic context-free grammar model of RNA folding.
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DOI:
10.1007/s00285-013-0750-y
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发表时间:
2014-12
影响因子:
1.9
通讯作者:
Heitsch, Christine E.
中科院分区:
文献类型:
--
作者:
Poznanovic, Svetlana;Heitsch, Christine E.
We analyze the distribution of RNA secondary structures given by the Knudsen-Hein stochastic context-free grammar used in the prediction program Pfold. Our main theorem gives relations between the expected number of these motifs — independent of the grammar probabilities. These relations are a consequence of proving that the distibution of base pairs, of helices, and of different types of loops is asympotically Gaussian in this model of RNA folding. Proof techniques use singularity analysis of probability generating functions. We also demonstrate that these asymptotic results capture well the expected number of RNA base pairs in native ribosomal structures, and certain other aspects of their predicted secondary structures. In particular, we find that the predicted structures largely satisfy the expected relations, although the native structures do not.
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影响因子:
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通讯作者:
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