Not All Scale-Free Networks Are Born Equal: The Role of the Seed Graph in PPI Network Evolution

Peer reviewed: 
Yes, item is peer reviewed.
Scholarly level: 
Faculty/Staff
Final version published as: 

Hormozdiari F, Berenbrink P, Pržulj N, Sahinalp SC (2007) Not All Scale-Free Networks Are Born Equal: The Role of the Seed Graph in PPI Network Evolution. PLoS Comput Biol 3(7): e118. doi:10.1371/journal.pcbi.0030118

Date created: 
2007-07
Keywords: 
Protein–protein interaction (PPI) network
Seed graph
Duplication model
Preferential attachment model
Abstract: 

The (asymptotic) degree distributions of the best-known “scale-free” network models are all similar and are independent of the seed graph used; hence, it has been tempting to assume that networks generated by these models are generally similar. In this paper, we observe that several key topological features of such networks depend heavily on the specific model and the seed graph used. Furthermore, we show that starting with the “right” seed graph (typically a dense subgraph of the protein–protein interaction network analyzed), the duplication model captures many topological features of publicly available protein–protein interaction networks very well

Language: 
English
Document type: 
Article
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