TY  - JOUR
AU  - Di Cairano, Loris
AU  - Stamm, Benjamin
AU  - Calandrini, Vania
TI  - Subdiffusive-Brownian crossover in membrane proteins: a Generalized Langevin Equation-based approach
JO  - Biophysical journal
VL  - 120
IS  - 21
SN  - 0006-3495
CY  - Bethesda, Md.
PB  - Soc.
M1  - FZJ-2021-03675
SP  - 4722-4737
PY  - 2021
AB  - In this paper, we propose a Generalized Langevin Equation (GLE)-based model to describe the lateral diffusion of a protein in a lipid bilayer. The memory kernel is represented in terms of a viscous (instantaneous) and an elastic (non instantaneous) component modeled respectively through a Dirac delta function and a three-parameter Mittag-Leffler type function. By imposing a specific relationship between the parameters of the three-parameters Mittag-Leffler function, the different dynamical regimes, namely ballistic, subdiffusive and Brownian, as well as the crossover from one regime to another, are retrieved. Within this approach, the transition time from the ballistic to the subdiffusive regime and the spectrum of relaxation times underlying the transition from the subdiffusive to the Brownian regime are given. The reliability of the model is tested by comparing the Mean Squared Displacement (MSD) derived in the framework of this model and the MSD of a protein diffusing in a membrane calculated through molecular dynamics (MD) simulations.
LB  - PUB:(DE-HGF)16
C6  - pmid:34592261
UR  - <Go to ISI:>//WOS:000716322100009
DO  - DOI:10.1016/j.bpj.2021.09.033
UR  - https://juser.fz-juelich.de/record/897209
ER  -