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Genetically targeted ratiometric and activated pH indicator complexes (TRApHIC) for receptor trafficking.
Biochemistry 57, 861-871 (2018)
Fluorescent protein-based pH sensors are useful tools for measuring protein trafficking through pH changes associated with endo- and exocytosis. However, commonly used pH-sensing probes are ubiquitously expressed with their protein of interest throughout the cell, hindering our ability to focus on specific trafficking pools of proteins. We developed a family of excitation ratiometric, activatable pH responsive tandem dyes, consisting of a pH sensitive Cy3 donor linked to a fluorogenic malachite green acceptor. These cell-excluded dyes are targeted and activated upon binding to a genetically expressed fluorogen-activating protein and are suitable for selective labeling of surface proteins for analysis of endocytosis and recycling in live cells using both confocal and superresolution microscopy. Quantitative profiling of the endocytosis and recycling of tagged beta 2-adrenergic receptor (B2AR) at a single-vesicle level revealed differences among B2AR agonists, consistent with more detailed pharmacological profiling.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Red Fluorescent Protein; Beta(2)-adrenergic Receptor; Surface-proteins; Intracellular Ph; Cell; Probes; Internalization; Endocytosis; Microscopy; Pathways
ISSN (print) / ISBN
0006-2960
e-ISSN
1520-4995
Zeitschrift
Biochemistry
Quellenangaben
Band: 57,
Heft: 5,
Seiten: 861-871
Verlag
American Chemical Society (ACS)
Verlagsort
Washington
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Human Genetics (IHG)