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- W1788974410 abstract "Transmembrane proteins are proteins that are inserted into the membranes of the cell and its organelles. They perform a variety of essential functions as channels, pumps, receptors and energy transducers, and are therefore a major target for drug development. It is estimated that about 20%-30% of a proteome are transmembrane proteins but structure and function have been identified for only a fraction of them. Proteins are distributed to their specific subcellular locations within the cell by highly complex sorting machinery. A crucial first step in revealing the function of a protein is therefore the determination of its subcellular localization. Experimental localization techniques are time consuming and expensive and cannot keep pace with the exponentially growing number of protein sequences. Consequently, computational techniques for subcellular localization prediction have been developed. The vast majority of these prediction algorithms are designed for soluble proteins however, and ignore the characteristic topology of transmembrane proteins. In this thesis, topological models of transmembrane proteins for subcellular localization prediction are constructed and studied, utilizing three different machine learning techniques: Support Vector Machines, Hidden Markov Models and Conditional Random Fields. The objectives of the thesis are: Firstly, to evaluate whether topological models achieve higher prediction accuracies than non-topological models. Secondly, to examine methods to model the topological regions of transmembrane proteins. Thirdly, to study the relationship between topological regions and protein localization. And fourthly, to compare different machine learning techniques in the context of transmembrane protein modeling and subcellular localization prediction. The prediction performances of the constructed models are evaluated on two datasets. The first one is a subset of the mouse proteome, containing transmembrane proteins with experimentally confirmed subcellular localizations. The second one is a selection of eukaryotic transmembrane proteins, extracted from the Swiss-Prot database." @default.
- W1788974410 created "2016-06-24" @default.
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- W1788974410 date "2007-01-01" @default.
- W1788974410 modified "2023-09-27" @default.
- W1788974410 title "Topological models of transmembrane proteins for subcellular localization prediction" @default.
- W1788974410 hasPublicationYear "2007" @default.
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