Revealing the secrets of nanodisc architecture using multi-detection GPC/SEC

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00:00:00 Welcome
00:00:13 Introduction
00:00:58 Revealing the secrets of nanodisc architecture using multi-detection GPC/SEC
00:01:11 Outline
00:02:19 Motivation
00:03:36 Motivation
00:03:56 Motivation
00:05:43 Motivation
00:07:25 Theory: Omnisec
00:07:34 OmniSEC
00:08:28 Untitled
00:09:14 Concentration detectors(RI and UV absorption)
00:10:47 Molar mass detector(static light scattering)
00:12:57 Molecular size detector(viscometry)
00:14:21 Molecular size detector(dynamic light scattering)
00:15:11 Results: BSA and SMALPs
00:15:24 Experimental conditions
00:16:50 BSA chromatogram
00:17:41 BSA analysis
00:18:49 BSA analysis
00:19:27 SMALP analysis(method)
00:20:23 SMALP chromatogram
00:22:36 SMALP analysis (SMA distribution)
00:23:41 SMALP analysis (SMA distribution)
00:24:47 SMALP analysis (SMA distribution)
00:25:47 SMALP analysis (SMALP and SMA molar mass)
00:26:25 SMALP analysis (SMALP size and composition)
00:28:10 SMALP analysis (SMALP size and shape)
00:31:00 Summary and conclusions
00:32:05 Acknowledgements
00:32:35 Q&A
00:39:12 Contact Information

Membrane protein research is dependent on the availability of membrane mimics that retain the structure and function of the target protein within a lipid-bilayer environment while rendering it amenable to in vitro investigations.

Styrene/maleic acid (SMA) copolymers extract phospholipids and proteins from artificial and natural membranes to form polymer-bounded nanodiscs (SMALPs) which retain the lipid-bilayer architecture of the host membrane. Therefore, SMALPs are gaining increasing interest among membrane-protein researchers as an attractive alternative to conventional membrane mimics such as micelles and liposomes. However, the morphology of SMALPs, and, in particular, the extent to which they provide a “protein-friendly” lipid-bilayer environment, remains poorly characterized.

In this webinar, we will demonstrate how multi-detector GPC/SEC provides compositional and morphological information on SMALPs, contributing to a better, quantitative understanding of these new membrane-mimetic nanoparticles.


Johannes Klingler studied Biophysics at the University of Kaiserslautern and received his Diploma in 2013 as a member of Prof. Dr. Sandro Keller’s lab group. Since then, he has worked within the same group on his PhD project, which is focused on the structural and thermodynamic characterization of polymer/lipid nanoparticles by spectroscopic, calorimetric, chromatographic, and light scattering techniques.