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Home / Proceedings / Proceedings Of The Second International Conference On Intelligent Systems For Molecular Biology / Book One

Stochastic Motif Extraction Using Hidden Markov Model

March 15, 2023

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Authors

Yukiko Fujiwara

Minoru Asogawa

and Akihiko Konagaya

DOI:


Abstract:

In this paper, we study the application of an ttMM (hidden Markov model) to the problem of representing protein sequences by a stochastic motif. A stochastic protein motif represents the small segments of protein sequences that have a certain function or structure. The stochastic motif, represented by an HMM, has conditional probabilities to deal with the stochastic nature of the motif. This HMM directly reflects the characteristics of the motif, such as a protein periodical structure or grouping. In order to obtain the optimal HMM, we developed, the iterative duplication method for HMM topology learning. It starts from a small fully-connected network and iterates the network generation and parameter optimization until it achieves sufficient discrimination accuracy. Using this method, we obtained an ttMM for a leucine zipper motif. Compared to the accuracy of a symbolic pattern representation with accuracy of 14.8 percent, an tIMM achieved 79.3 percent in prediction. Additionally, the method can obtain an HMM for various types of zinc finger motifs, and it might separate the mixed data. We demonstrated that this approach is applicable to the validation of the protein databases; a constructed HMM has indicated that one protein sequence annotated as "leucinezipper like sequence" in the database is quite different from other leucine-zipper sequences in terms of likelihood, and we found this discrimination is plausible.

Topics: ISMB

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HOW TO CITE:

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya Stochastic Motif Extraction Using Hidden Markov Model Proceedings Of The Second International Conference On Intelligent Systems For Molecular Biology (1994) .

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya Stochastic Motif Extraction Using Hidden Markov Model ISMB 1994, .

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya (1994). Stochastic Motif Extraction Using Hidden Markov Model. Proceedings Of The Second International Conference On Intelligent Systems For Molecular Biology, .

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya. Stochastic Motif Extraction Using Hidden Markov Model. Proceedings Of The Second International Conference On Intelligent Systems For Molecular Biology 1994 p..

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya. 1994. Stochastic Motif Extraction Using Hidden Markov Model. "Proceedings Of The Second International Conference On Intelligent Systems For Molecular Biology". .

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya. (1994) "Stochastic Motif Extraction Using Hidden Markov Model", Proceedings Of The Second International Conference On Intelligent Systems For Molecular Biology, p.

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya, "Stochastic Motif Extraction Using Hidden Markov Model", ISMB, p., 1994.

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya. "Stochastic Motif Extraction Using Hidden Markov Model". Proceedings Of The Second International Conference On Intelligent Systems For Molecular Biology, 1994, p..

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya. "Stochastic Motif Extraction Using Hidden Markov Model". Proceedings Of The Second International Conference On Intelligent Systems For Molecular Biology, (1994): .

Yukiko Fujiwara||Minoru Asogawa||and Akihiko Konagaya. Stochastic Motif Extraction Using Hidden Markov Model. ISMB[Internet]. 1994[cited 2023]; .


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