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Super-resolution microscopy compatible fluorescent probes reveal endogenous glucagon-like peptide-1 receptor distribution and dynamics

MPS-Authors
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D´Este,  Elisa
Department of NanoBiophotonics, MPI for Biophysical Chemistry, Max Planck Society;

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Johnsson,  Kai
Chemical Biology, Max Planck Institute for Medical Research, Max Planck Society;

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Podewin,  Tom
Max Planck Institute for Medical Research, Max Planck Society;

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Broichhagen,  Johannes
Chemical Biology, Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Ast, J., Arvaniti, A., Fine, N. H., Nasteska, D., Ashford, F. B., Stamataki, Z., et al. (2020). Super-resolution microscopy compatible fluorescent probes reveal endogenous glucagon-like peptide-1 receptor distribution and dynamics. Nature Communications, 11: 467 (2020), pp. 1-18. doi:10.1038/s41467-020-14309-w.


Cite as: http://hdl.handle.net/21.11116/0000-0005-9030-1
Abstract
The glucagon-like peptide-1 receptor (GLP1R) is a class B G protein-coupled receptor (GPCR) involved in metabolism. Presently, its visualization is limited to genetic manipulation, antibody detection or the use of probes that stimulate receptor activation. Herein, we present LUXendin645, a far-red fluorescent GLP1R antagonistic peptide label. LUXendin645 produces intense and specific membrane labeling throughout live and fixed tissue. GLP1R signaling can additionally be evoked when the receptor is allosterically modulated in the presence of LUXendin645. Using LUXendin645 and LUXendin651, we describe islet, brain and hESC-derived β-like cell GLP1R expression patterns, reveal higher-order GLP1R organization including membrane nanodomains, and track single receptor subpopulations. We furthermore show that the LUXendin backbone can be optimized for intravital two-photon imaging by installing a red fluorophore. Thus, our super-resolution compatible labeling probes allow visualization of endogenous GLP1R, and provide insight into class B GPCR distribution and dynamics both in vitro and in vivo.