Abstract：
:Because of the small particle number of intracellular species participating in genetic circuits, stochastic fluctuations are inevitable. This intracellular noise is detrimental to precise regulation. To maintain the proper function of a cell, some natural motifs attenuate the noise at the protein level. In many biological systems, the protein monomer is used as a regulator, but the protein dimer also exists. In the present study, we demonstrated that the dimerization reaction reduces the noise intensity of the protein monomer. Compared with two common noise-buffering motifs, the incoherent feedforward loop (FFL) and negative feedback control, the coefficient of variation (COV) in the case of dimerization was 25% less. Furthermore, we examined a system with direct interaction between proteins and other ligands. Both the incoherent FFL and negative feedback control failed to buffer the noise, but the dimerization was effective. Remarkably, the formation of only one protein dimer was sufficient to cause a 7.5% reduction in the COV.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Liu FY,Lo SC,Shu CCdoi
10.1038/s41598-019-39611-6subject
Has Abstractpub_date
2019-03-04 00:00:00pages
3405issue
1issn
2045-2322pii
10.1038/s41598-019-39611-6journal_volume
9pub_type
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