Gene expression is a noisy process and several mechanisms, both transcriptional and post- transcriptional, can stabilize protein levels in cells. Much work has focused on the role of miRNAs, showing in particular that miRNA-mediated regulation can bu er expression noise for lowly expressed genes. Here, using in silico simulations and mathematical modeling, we demonstrate that miRNAs can exert a much broader in uence on protein levels by orchestrating competition-induced crosstalk between mRNAs. Most notably, we nd that miRNA-mediated cross-talk (i) can stabilize protein levels across the full range of gene expression rates, and (ii) modi es the correlation pattern of co-regulated interacting proteins, changing the sign of correlations from negative to positive. The latter feature may constitute a potentially robust signature of the existence of RNA crosstalk induced by endogenous competition for miRNAs in standard cellular conditions.
|Titolo:||CeRNA crosstalk stabilizes protein expression and affects the correlation pattern of interacting proteins|
|Data di pubblicazione:||2017|
|Digital Object Identifier (DOI):||10.1038/srep43673|
|Appare nelle tipologie:||1.1 Articolo in rivista|