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Concept-based Detection of Functional Modules in Protein Interaction Networks  

Park, Jong-Min (한국전자통신연구원 라이프인포메틱스팀)
Choi, Jae-Hun (한국전자통신연구원 라이프인포메틱스팀)
Park, Soo-Jun (한국전자통신연구원 아이프인포매틱스팀)
Yang, Jae-Dong (전북대학교 전자정보공학부)
Abstract
In the protein interaction network, there are many meaningful functional modules, each involving several protein interactions to perform discrete functions. Pathways and protein complexes are the examples of the functional modules. In this paper, we propose a new method for detecting the functional modules based on concept. A conceptual functional module, briefly concept module is introduced to match the modules taking them as its instances. It is defined by the corresponding rule composed of triples and operators between the triples. The triples represent conceptual relations reifying the protein interactions of a module, and the operators specify the structure of the module with the relations. Furthermore, users can define a composite concept module by the counterpart rule which, in turn, is defined in terms of the predefined rules. The concept module makes it possible to detect functional modules that are conceptually similar as well as structurally identical to users' queries. The rules are managed in the XML format so that they can be easily applied to other networks of different species. In this paper, we also provide a visualized environment for intuitionally describing complexly structured rules.
Keywords
concept-based detection; triple-based rule definition; functional module; protein interaction network;
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