MultiSig: a new high-precision approach to the analysis of complex biomolecular systems

Gillis, Richard B. and Adams, Gary G. and Heinze, Thomas and Nikolajski, Melanie and Harding, Stephen E. and Rowe, Arthur J. (2013) MultiSig: a new high-precision approach to the analysis of complex biomolecular systems. European Biophysics Journal, 42 (10). pp. 777-786. ISSN 0175-7571

[img] PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution.
Download (495kB)

Abstract

MultiSig is a newly developed mode of analysis of sedimentation equilibrium (SE) experiments in the analytical ultracentrifuge, having the capability of taking advantage of the remarkable precision (~0.1 % of signal) of the principal optical (fringe) system employed, thus supplanting existing methods of analysis through reducing the ‘noise’ level of certain important parameter estimates by up to orders of magnitude. Long-known limitations of the SE method, arising from lack of knowledge of the true fringe number in fringe optics and from the use of unstable numerical algorithms such as numerical differentiation, have been transcended. An approach to data analysis, akin to ‘spatial filtering’, has been developed, and shown by both simulation and practical application to be a powerful aid to the precision with which near-monodisperse systems can be analysed, potentially yielding information on protein-solvent interaction. For oligo- and poly-disperse systems the information returned includes precise average mass distributions over both cell radial and concentration ranges and mass-frequency histograms at fixed radial positions. The application of MultiSig analysis to various complex heterogenous systems and potentially multiply-interacting carbohydrate oligomers is described.

Item Type: Article
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Biosciences
Identification Number: https://doi.org/10.1007/s00249-013-0924-y
Depositing User: Johnson, Mrs Alison
Date Deposited: 25 Apr 2014 12:22
Last Modified: 15 Sep 2016 16:19
URI: http://eprints.nottingham.ac.uk/id/eprint/3003

Actions (Archive Staff Only)

Edit View Edit View