TY - JOUR
T1 - A palette of fluorescent proteins optimized for diverse cellular environments
AU - Costantini, Lindsey M.
AU - Baloban, Mikhail
AU - Markwardt, Michele L.
AU - Rizzo, Mark
AU - Guo, Feng
AU - Verkhusha, Vladislav V.
AU - Snapp, Erik L.
N1 - Funding Information:
We thank Ramanujan Hegde (Laboratory of Molecular Biology, Cambridge, UK) for the anti-GFP antibody, Oksana Subach and Grigory Filonov for the help with experiments, and the Einstein Analytical Imaging Facility for use of the Zeiss Duoscan. The LAMP1 antibody developed by J. Thomas August and James E.K. Hildreth was obtained from the Developmental Studies Hybridoma Bank developed under the auspices of the NICHD and maintained by The University of Iowa, Department of Biology, Iowa City, IA 52242. This work is supported by grants from the National Institute of General Medical Sciences GM10599 (ELS and VVV), GM073913 and GM108579 (VVV), the Marion Bessin Liver Center Imaging and Cell Structure Core supported by the National Institute of Diabetes and Digestive and Kidney Diseases P30DK041296 (ELS), and the National Institutes of Health Training Program in Cellular and Molecular Biology and Genetics Grant T32 GM007491 (LMC).
Publisher Copyright:
© 2015 Macmillan Publishers Limited. All rights reserved.
PY - 2015/7/9
Y1 - 2015/7/9
N2 - To perform quantitative live cell imaging, investigators require fluorescent reporters that accurately report protein localization and levels, while minimally perturbing the cell. Yet, within the biochemically distinct environments of cellular organelles, popular fluorescent proteins (FPs), including EGFP, can be unreliable for quantitative imaging, resulting in the underestimation of protein levels and incorrect localization. Specifically, within the secretory pathway, significant populations of FPs misfold and fail to fluoresce due to non-native disulphide bond formation. Furthermore, transmembrane FP-fusion constructs can disrupt organelle architecture due to oligomerizing tendencies of numerous common FPs. Here, we describe a powerful set of bright and inert FPs optimized for use in multiple cellular compartments, especially oxidizing environments and biological membranes. Also, we provide new insights into the use of red FPs in the secretory pathway. Our monomeric 'oxFPs' finally resolve long-standing, underappreciated and important problems of cell biology and should be useful for a number of applications.
AB - To perform quantitative live cell imaging, investigators require fluorescent reporters that accurately report protein localization and levels, while minimally perturbing the cell. Yet, within the biochemically distinct environments of cellular organelles, popular fluorescent proteins (FPs), including EGFP, can be unreliable for quantitative imaging, resulting in the underestimation of protein levels and incorrect localization. Specifically, within the secretory pathway, significant populations of FPs misfold and fail to fluoresce due to non-native disulphide bond formation. Furthermore, transmembrane FP-fusion constructs can disrupt organelle architecture due to oligomerizing tendencies of numerous common FPs. Here, we describe a powerful set of bright and inert FPs optimized for use in multiple cellular compartments, especially oxidizing environments and biological membranes. Also, we provide new insights into the use of red FPs in the secretory pathway. Our monomeric 'oxFPs' finally resolve long-standing, underappreciated and important problems of cell biology and should be useful for a number of applications.
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U2 - 10.1038/ncomms8670
DO - 10.1038/ncomms8670
M3 - Article
C2 - 26158227
AN - SCOPUS:84935506373
SN - 2041-1723
VL - 6
JO - Nature Communications
JF - Nature Communications
M1 - 7670
ER -