Fluorophore-tagged Membranes
Fluorophore-tagged Membranes - Related Videos
12:58
Imaging pHluorin-tagged Receptor Insertion to the Plasma Membrane in Primary Cultured Mouse Neurons
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Cited by 8 •
2012
By tagging the extracellular domains of membrane receptors with superecliptic pHluorin, and by imaging these fusion receptors in cultured mouse neurons, we can directly visualize individual vesicular insertion events of the receptors to the plasma membrane. This technique will be instrumental in elucidating the molecular mechanisms governing receptor insertion to the plasma membrane.
11:57
Using an α-Bungarotoxin Binding Site Tag to Study GABA A Receptor Membrane Localization and Trafficking
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Cited by 5 •
2014
Here we demonstrate the use of fluorescent Alexa dye coupled to α-bungarotoxin to measure GABA A receptor surface localization and endocytosis in hippocampal neurons. Through the use of constructs bearing a short extracellular tag that binds α-bungarotoxin, analysis of plasma membrane protein endocytic trafficking can be achieved.
11:43
Easy Measurement of Diffusion Coefficients of EGFP-tagged Plasma Membrane Proteins Using k-Space Image Correlation Spectroscopy
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Cited by 37 •
2014
This paper provides a step by step guide to the fluctuation analysis technique k-Space Image Correlation Spectroscopy (kICS) for measuring diffusion coefficients of fluorescently labeled plasma membrane proteins in live mammalian cells.
10:20
Studying Membrane Protein Trafficking in Drosophila Photoreceptor Cells Using eGFP-Tagged Proteins
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Cited by 1 •
2022
Here, non-invasive methods are described for localization of photoreceptor membrane proteins and assessment of retinal degeneration in the Drosophila compound eye using eGFP fluorescence.
11:26
High-throughput Gene Tagging in Trypanosoma brucei
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Cited by 21 •
2016
Addition of a tag to a protein is a powerful way of gaining insight into its function. Here, we describe a protocol to endogenously tag hundreds of Trypanosoma brucei proteins in parallel such that genome scale tagging is achievable.
FAQs
The labeling strategy determines which membrane feature becomes visible. Attaching fluorophores to membrane lipids can report lipid-associated organization, whereas tagging membrane proteins can follow the distribution or movement of particular proteins. Incorporating fluorophores into the lipid bilayer provides another way to mark the membrane itself. This choice connects the observed fluorescence to a specific molecular component.
Fluorophore-tagged membranes produce information through a two-stage optical process: excitation at a specific wavelength and emission of light that can be detected by fluorescence microscopy. The emitted signal marks where the labeled membrane material is located. Changes in that signal across observations can therefore be used to examine membrane distribution, mobility, and molecular interactions.
Fluorescence microscopy can reveal where membrane components are distributed, how they move, and whether labeled molecules interact within the membrane environment. These observations extend beyond simply locating a membrane, because they connect spatial patterns with dynamic behavior. In neuroscience, such readouts help relate membrane organization to processes such as receptor trafficking and synaptic vesicle cycling.
A typical workflow begins by selecting a membrane lipid, membrane protein, or bilayer-incorporated fluorophore according to the feature of interest. The labeled sample may then be examined as a living or fixed preparation. Researchers excite the fluorophore at an appropriate wavelength and use fluorescence microscopy to assess membrane distribution, mobility, or molecular interactions.
Living samples allow investigators to examine membrane behavior as it occurs, including movement associated with neuronal processes. Fixed samples provide a way to visualize membrane organization after the sample has been preserved. Using either format lets the experiment match the biological question, whether the focus is dynamic remodeling or the spatial arrangement of labeled components.
In neuroscience, this approach supports examination of neuronal membrane remodeling, receptor trafficking, synaptic vesicle cycling, and axonal transport. These applications connect membrane behavior with the movement and organization of components involved in neuronal communication. The resulting observations can contribute to studies of brain development, neural signaling, and mechanisms associated with neurological disease.
Tracking labeled membranes shows how membrane remodeling and component movement relate to neuronal function. Observations of receptor trafficking, synaptic vesicle cycling, and axonal transport provide molecular context for changes occurring at neuronal connections. This makes the method useful for investigating how membrane behavior contributes to neural signaling and plasticity, as well as to altered processes in disease.