scholarly journals Structure and Dynamics of Nanopore-Confined Membrane Proteins are Affected by Bilayer Lipid Composition

2017 ◽  
Vol 112 (3) ◽  
pp. 388a
Author(s):  
Alexander A. Nevzorov ◽  
Morteza Jafarabadi ◽  
Antonin Marek ◽  
Alex I. Smirnov
2005 ◽  
Vol 33 (5) ◽  
pp. 910-912 ◽  
Author(s):  
P.J. Bond ◽  
J. Cuthbertson ◽  
M.S.P. Sansom

Interactions between membrane proteins and detergents are important in biophysical and structural studies and are also biologically relevant in the context of folding and transport. Despite a paucity of high-resolution data on protein–detergent interactions, novel methods and increased computational power enable simulations to provide a means of understanding such interactions in detail. Simulations have been used to compare the effect of lipid or detergent on the structure and dynamics of membrane proteins. Moreover, some of the longest and most complex simulations to date have been used to observe the spontaneous formation of membrane protein–detergent micelles. Common mechanistic steps in the micelle self-assembly process were identified for both α-helical and β-barrel membrane proteins, and a simple kinetic mechanism was proposed. Recently, simplified (i.e. coarse-grained) models have been utilized to follow long timescale transitions in membrane protein–detergent assemblies.


Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 562
Author(s):  
Miliça Ristovski ◽  
Danny Farhat ◽  
Shelly Ellaine M. Bancud ◽  
Jyh-Yeuan Lee

Lipid composition in cellular membranes plays an important role in maintaining the structural integrity of cells and in regulating cellular signaling that controls functions of both membrane-anchored and cytoplasmic proteins. ATP-dependent ABC and P4-ATPase lipid transporters, two integral membrane proteins, are known to contribute to lipid translocation across the lipid bilayers on the cellular membranes. In this review, we will highlight current knowledge about the role of cholesterol and phospholipids of cellular membranes in regulating cell signaling and how lipid transporters participate this process.


1973 ◽  
Vol 51 (5) ◽  
pp. 632-636 ◽  
Author(s):  
Shlomo Rottem ◽  
Leonard Hayflick

Circular dichroism analyses of Acholeplasma laidlawii membranes solubilized by sodium dodecyl sulfate showed a typical α-helix spectrum. The estimated α-helix content was of the order of 35% calculated from the ellipticity at 208 nm of membranes solubilized by 20 mM SDS. Reaggregation of the solubilized membrane material to a membrane-like structure resulted in a distorted spectrum with low amplitude and red-shifted extrema like that of the native membranes. Throughout the growth cycle the circular dichroism spectra of membrane proteins remained the same despite the marked differences in membrane densities. The optical activity of the membranes was not affected by changing the lipid composition or extraction of over 90% of the lipids, although the latter resulted in marked destabilization of the proteins.


2004 ◽  
Vol 343 (1) ◽  
pp. 213-222 ◽  
Author(s):  
Paul Curnow ◽  
Mark Lorch ◽  
Kalypso Charalambous ◽  
Paula J. Booth

2014 ◽  
Vol 136 (11) ◽  
pp. 4093-4096 ◽  
Author(s):  
Yuanli Song ◽  
Kathleen F. Mittendorf ◽  
Zhenwei Lu ◽  
Charles R. Sanders

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