Semantically predicting protein functions based on protein functional connectivity.

Abstract:

BACKGROUND:The current availability of public protein-protein interaction (PPI) databases which are usually modelled as PPI networks has led to the rapid development of protein function prediction approaches. The existing network-based prediction approaches mainly focus on the topological similarities between immediately interacting proteins, neglecting the protein functional connectivity which is the functional tightness between proteins. In this paper, we attempt to predict the functions of unannotated proteins based on PPI networks by incorporating the protein functional connectivity, as well as the similarity of protein functions, into the prediction procedure. RESULTS:An approach named Semantic protein function Prediction based on protein Functional Connectivity (SPFC) is proposed to achieve a higher accuracy in predicting functions of unannotated protein. We define the functional connectivity and function addition for each protein, and incorporate them into the prediction. We evaluated the SPFC on real PPI datasets and the experiment results show that the SPFC method is more effective in function prediction than other network-based approaches. CONCLUSION:Incorporating the functional connectivity of each protein into the function prediction can significantly improve the accuracy of protein prediction.

journal_name

Comput Biol Chem

authors

Zhu W,Hou J,Chen YP

doi

10.1016/j.compbiolchem.2013.01.002

subject

Has Abstract

pub_date

2013-06-01 00:00:00

pages

9-14

eissn

1476-9271

issn

1476-928X

pii

S1476-9271(13)00004-2

journal_volume

44

pub_type

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