Thermally Induced Structural Organization of Nanodiscs By Coarse-Grained Molecular Dynamics Simulations
Document Type
Article
Publication Date
12-1-2020
Department
Physics and Astronomy
School
Mathematics and Natural Sciences
Abstract
© 2020 Elsevier B.V. Membrane scaffold proteins (MSP) nanodiscs have been extensively used in structural study of membrane proteins. In cryo-EM, an incorporation of target proteins into nanodiscs is conducted under a rapid change from cryogenic to ambient temperatures. We present a coarse-grained molecular dynamics (CGMD) study for investigating an effect of temperature on the structural organization of DPPC-nanodisc and POPC-nanodisc. A non-monotonic response of physical quantities (i.e. the lipid order parameter, nanodisc flatness, structural change, solvation property, radius of gyration) with increase in temperature (T = 200–350 K) is found to be associated with the gel-ripple-liquid crystalline phase change within nanodiscs. The reorganization of lipids upon temperature variation induced conformational changes of MSP to minimize hydrophobic exposure of the lipid membrane to an aqueous environment. Structural response to temperature is different to a certain extent between the saturated DPPC and unsaturated POPC.
Publication Title
Biophysical Chemistry
Volume
267
Recommended Citation
Rangubpit, W.,
Paritanon, P.,
Pandey, R.,
Sompornpisut, P.
(2020). Thermally Induced Structural Organization of Nanodiscs By Coarse-Grained Molecular Dynamics Simulations. Biophysical Chemistry, 267.
Available at: https://aquila.usm.edu/fac_pubs/18188