TY  - JOUR
A1  - Kar, Prathitha
A1  - Cherstvy, Andrey G.
A1  - Metzler, Ralf
T1  - Acceleration of bursty multiprotein target search kinetics on DNA by colocalisation
JF  - Physical chemistry, chemical physics : a journal of European Chemical Societies
N2  - Proteins are capable of locating specific targets on DNA by employing a facilitated diffusion process with intermittent 1D and 3D search steps. Gene colocalisation and coregulation-i.e. the spatial proximity of two communicating genes-is one factor capable of accelerating the target search process along the DNA. We perform Monte Carlo computer simulations and demonstrate the benefits of gene colocalisation for minimising the search time in a model DNA-protein system. We use a simple diffusion model to mimic the search for targets by proteins, produced initially in bursts of multiple proteins and performing the first-passage search on the DNA chain. The behaviour of the mean first-passage times to the target is studied as a function of distance between the initial position of proteins and the DNA target position, as well as versus the concentration of proteins. We also examine the properties of bursty target search kinetics for varying physical-chemical protein-DNA binding affinity. Our findings underline the relevance of colocalisation of production and binding sites for protein search inside biological cells.
Y1  - 2017
U6  - https://doi.org/10.1039/c7cp06922g
SN  - 1463-9076
SN  - 1463-9084
VL  - 20
IS  - 12
SP  - 7931
EP  - 7946
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -