Optimal DNA Signal Recognition Models with a Fixed Amount of Intrasignal Dependency
Optimal DNA Signal Recognition Models with a Fixed Amount of Intrasignal Dependency
复制标题
具有固定信号内依赖性的最佳 DNA 信号识别模型
DOI:
10.1007/978-3-540-39763-2_7
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发表时间:
2003
期刊:
影响因子:
--
通讯作者:
T. Vinař
中科院分区:
文献类型:
--
作者:
Broňa Brejová;Daniel G. Brown;T. Vinař
We study new probabilistic models for signals in DNA. Our models allow dependencies between multiple non-adjacent positions, in a generative model we call a higher-order tree. Computing the model of maximum likelihood is equivalent in our context to computing a minimum directed spanning hypergraph, a problem we show is NP-complete. We instead compute good models using simple greedy heuristics. In practice, the advantage of using our models over more standard models based on adjacent positions is modest. However, there is a notable improvement in the estimation of the probability that a given position is a signal, which is useful in the context of probabilistic gene finding. We also show that there is little improvement by incorporating multiple signals involved in gene structure into a composite signal model in our framework, though again this gives better estimation of the probability that a site is an acceptor site signal.
影响因子:
5.6
作者:
Burge, C;Karlin, S
通讯作者:
Karlin, S
影响因子:
14.9
作者:
Salzberg, SL;Delcher, AL;White, O
通讯作者:
White, O