Optimising the precision for localising fluorescent proteins in living cells by 2D Gaussian fitting of digital images: application to COPII-coated endoplasmic reticulum exit sites

European Biophysics Journal : EBJ
Peter SpenceAndrew J Hudson

Abstract

An insight into the operation of molecular motors has already been obtained under in vitro conditions from single-molecule tracking of proteins. It remains to analyse the effects of these motors on the position and secretion of specific organelles in the environment of the cell. For this purpose, we have investigated the accuracy of a standard algorithm to enable the tracking of particles in live-cell microscopy. The results have been applied to an example study into the role of the microtubule-motor kinesin on the function of COPII-coated secretory-cargo exit sites forming part of the mammalian endoplasmic reticulum. These exit sites are marked with multiple EYFP-tagged proteins to produce bright fluorescent particles, and a demonstration of the motility of vesicles, under different conditions in the cell, is described here. It is essential to use a low-level expression of fluorescent protein-tagged cellular components to ensure faithful replication for the behaviour of endogenous protein. However, this leads to a lower ratio for the signal-to-noise than is desired for the sub-pixel tracking of objects in digital images. This has driven the present effort to develop a computational model of the experiment in order to estimate ...Continue Reading

References

Apr 2, 1996·Proceedings of the National Academy of Sciences of the United States of America·T SchmidtH Schindler
Sep 4, 1997·Nature·J F PresleyJ Lippincott-Schwartz
Sep 22, 2001·Biophysical Journal·M K CheezumW H Guilford
Apr 20, 2002·Biophysical Journal·Russell E ThompsonWatt W Webb
Feb 28, 2003·Methods : a Companion to Methods in Enzymology·G I MashanovJustin E Molloy
Dec 8, 2004·Nature Cell Biology·Peter WatsonDavid J Stephens
Jul 21, 2005·Accounts of Chemical Research·Ahmet Yildiz, Paul R Selvin
Oct 6, 2005·Physical Biology·Brian C CarterSteven P Gross
Nov 1, 2005·Biophysical Journal·L Stirling ChurchmanJames A Spudich
Dec 7, 2007·Histochemistry and Cell Biology·Helen Hughes, David J Stephens
Dec 13, 2007·Journal of Cell Science·Stephan HeinzerMatthias Weiss

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Citations

Jan 10, 2012·Nature Protocols·Pei-Hsun WuDenis Wirtz
Apr 4, 2013·Journal of Cell Science·Sylvie D HuntDavid J Stephens
Jan 17, 2012·PloS One·David KellyKaroline Wiesner

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