Going the distance for protein function prediction: a new distance metric for protein interaction networks.
Going the distance for protein function prediction: a new distance metric for protein interaction networks.
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DOI:
10.1371/journal.pone.0076339
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Hescott B
中科院分区:
文献类型:
--
作者:
Cao M;Zhang H;Park J;Daniels NM;Crovella ME;Cowen LJ;Hescott B
In protein-protein interaction (PPI) networks, functional similarity is often inferred based on the function of directly interacting proteins, or more generally, some notion of interaction network proximity among proteins in a local neighborhood. Prior methods typically measure proximity as the shortest-path distance in the network, but this has only a limited ability to capture fine-grained neighborhood distinctions, because most proteins are close to each other, and there are many ties in proximity. We introduce diffusion state distance (DSD), a new metric based on a graph diffusion property, designed to capture finer-grained distinctions in proximity for transfer of functional annotation in PPI networks. We present a tool that, when input a PPI network, will output the DSD distances between every pair of proteins. We show that replacing the shortest-path metric by DSD improves the performance of classical function prediction methods across the board.
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期刊:
Bioinformatics (Oxford, England)
影响因子:
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