Connectivity and expression in protein networks: Proteins in a complex are uniformly expressed

Details Connectivity and expression in protein networks: Proteins in a complex are uniformly expressed Connectivity and expression in protein networks: Proteins in a complex are uniformly expressed

2005-08-17

arxiv.org/abs/q-bio/0508021v2

Phys. Rev. E 73, 031909 (2006)

Biology

Quantitative Biology

Molecular Networks

revised version; accepted for publication in PRE

Scientific paper

10.1103/PhysRevE.73.031909

We explore the interplay between the protein-protein interactions network and the expression of the interacting proteins. It is shown that interacting proteins are expressed in significantly more similar cellular concentrations. This is largely due to interacting pairs which are part of protein complexes. We solve a generic model of complex formation and show explicitly that complexes form most efficiently when their members have roughly the same concentrations. Therefore, the observed similarity in interacting protein concentrations could be attributed to optimization for efficiency of complex formation.

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