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Synthesis and Electrochemical Characterization of 4-Thio Pseudo-Glycolipids as Candidate Tethers for Lipid Bilayer Models.

Show simple item record Priske, Gillian Su, ZhangFei Abbasi, Fatemeh Lipkowski, Jacek Auzanneau, France-Isabelle 2019-07-15T12:54:42Z 2018-12 2018-08 2018-12-12
dc.identifier.issn 0013-4686
dc.description.abstract Two 4-thio pseudo-glycolipids, a disulfide and a thiol, were synthesized as candidates to build tethered bilayer lipid membranes (tBLMs) on gold (111) surface. Monolayers of the disulfide and thiol were built on gold surfaces using the self-assembly and Langmuir-Blodgett (LB) transfer methods. Monolayers were prepared in several solvents and at various temperatures; their quality was assessed by differential capacitance. Best monolayers were achieved when the disulfide was self-assembled in ethanol. The quality of such monolayers was further improved by allowing the assembly to proceed under stirring of the solution at increased temperatures. The charge number per adsorbed molecule and surface concentration of disulfide on gold (111) surface were determined by chronocoulometry. A DPhPC/disulfide tBLM was then built by vesicle fusion of 1,2-diphytanyl-sn-glycero-3-phosphocholine (DPhPC) on top of the disulfide monolayer. The minimum capacitance of the gold electrode with tBLM (1.3 mF cm 2) was close to the value of a real cell membrane and the AFM force spectroscopy measurements showed that the DPhPC/disulfide tBLM had a thickness of 6.2 ± 0.6 nm consistent with the thickness expected for a bilayer. Finally, the potential of the tBLM to study transmembrane proteins was assessed by investigating the reconstitution of gramicidin A into the membrane by polarization modulation infrared absorption spectroscopy (PM-IRRAS). These results demonstrate that the disulfide is a good candidate to construct tBLMs on gold surface and to study transmembrane proteins. en_US
dc.description.sponsorship Natural Sciences and Engineering Research Council of Canada en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International *
dc.rights.uri *
dc.subject Thio-glycolipid en_US
dc.subject Self-assembled monolayer en_US
dc.subject Surface concentration en_US
dc.subject AFM en_US
dc.subject PM-IRRAS en_US
dc.title Synthesis and Electrochemical Characterization of 4-Thio Pseudo-Glycolipids as Candidate Tethers for Lipid Bilayer Models. en_US
dc.type Article en_US Department of Chemistry en_US
dc.description.embargo 2020-12-12
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Attribution-NonCommercial-NoDerivatives 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International