Identifying protein complexes and functional modules--from static PPI networks to dynamic PPI networks
- PMID: 23780996
- DOI: 10.1093/bib/bbt039
Identifying protein complexes and functional modules--from static PPI networks to dynamic PPI networks
Abstract
Cellular processes are typically carried out by protein complexes and functional modules. Identifying them plays an important role for our attempt to reveal principles of cellular organizations and functions. In this article, we review computational algorithms for identifying protein complexes and/or functional modules from protein-protein interaction (PPI) networks. We first describe issues and pitfalls when interpreting PPI networks. Then based on types of data used and main ideas involved, we briefly describe protein complex and/or functional module identification algorithms in four categories: (i) those based on topological structures of unweighted PPI networks; (ii) those based on characters of weighted PPI networks; (iii) those based on multiple data integrations; and (iv) those based on dynamic PPI networks. The PPI networks are modelled increasingly precise when integrating more types of data, and the study of protein complexes would benefit by shifting from static to dynamic PPI networks.
Keywords: dynamic network; functional module; protein complex; protein–protein interaction; static network.
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