Is the intrinsic disorder of proteins the cause of the scale-free   architecture of protein-protein interaction networks?
  In protein-protein interaction networks certain topological properties appear to be recurrent: networks maps are considered scale-free. It is possible that this topology is reflected in the protein structure. In this paper we investigate the role of protein disorder in the network topology. We find that the disorder of a protein (or of its neighbors) is independent of its number of protein-protein interactions. This result suggests that protein disorder does not play a role in the scale-free architecture of protein networks. 
Santiago Schnell, Santo Fortunato and Sourav Roy (Indiana University   School of Informatics)