Endocytic Receptor
Endocytic Receptor - Related Videos
08:02
Live-cell Imaging of Endocytic Transport using Functionalized Nanobodies in Cultured Cells
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Cited by 1 •
2025
Endocytic and retrograde transport of proteins from the plasma membrane to the trans-Golgi network is essential to maintaining membrane homeostasis and regulating signaling. Here, we describe a method to image and quantify endocytic transport of transmembrane cargo proteins by live-cell microscopy using derivatized anti-GFP nanobodies in HeLa cells.
11:32
Measuring Plasma Membrane Protein Endocytic Rates by Reversible Biotinylation
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Cited by 23 •
2009
Regulated endocytosis governs the cell surface expression levels of the majority of membrane proteins. Here we utilize reducible, membrane impermeant biotinylation reagents to measure the endocytic rate of the dopamine transporter (DAT), a polytopic membrane protein. The method facilitates a straightforward approach to measuring the endocytic rate of most plasma membrane proteins.
12:03
Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors
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Cited by 14 •
2016
Here we present a protocol to describe the localization of angiotensin II Type 1 receptors in the rat brain by quantitative, densitometric, in vitro receptor autoradiography using an iodine-125 labeled analog of angiotensin II.
05:13
Density Gradient Ultracentrifugation for Investigating Endocytic Recycling in Mammalian Cells
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Cited by 1 •
2021
This paper aims to present a protocol for preparing recycling endosomes from mammalian cells using sucrose density gradient ultracentrifugation.
09:46
Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy
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Cited by 20 •
2014
Several methods are available for measuring intracellular pH but very few of these allow simultaneous measurement of cytoplasmic and organellar pH. Here, we describe in detail a rapid and accurate methodology to simultaneously measure cytoplasmic and vesicular pH by ratiometric imaging of living cells.
FAQs
After ligand binding, an endocytic receptor can cluster in the membrane and recruit adaptor proteins. These adaptors help connect the receptor-cargo complex with clathrin-coated pits when that route is used. Coat assembly promotes membrane bending, while subsequent scission separates an endocytic vesicle from the cell surface. This sequence couples molecular recognition to physical membrane remodeling.
Sorting endosomes receive cargo after vesicle entry and direct it toward different cellular destinations. Some receptor-cargo complexes return to the cell surface through recycling, whereas others proceed toward degradation. This sorting step determines whether the cell can reuse a receptor or ligand-related component and therefore influences the duration and outcome of uptake.
Clustering creates a platform that favors adaptor recruitment and organizes receptor-cargo complexes for entry into coated membrane regions. Because endocytic receptors also participate in signal regulation, changes in clustering can connect extracellular binding with both internalization and signaling outcomes. The spatial organization of receptors therefore helps coordinate membrane trafficking with cellular responses.
A biochemical analysis can trace the pathway from extracellular ligand binding through receptor clustering, adaptor recruitment, coated-pit formation, membrane scission, and delivery to sorting endosomes. Investigators can then relate the sorting outcome to recycling or degradation. Organizing the pathway in this sequence helps distinguish recognition, vesicle formation, intracellular routing, and final cellular consequences.
Endocytic receptors contribute to nutrient uptake, including the cellular handling of cholesterol and iron, while also helping regulate signals initiated at the cell surface. Their trafficking activity can affect how long receptor-bound information remains available to the cell. These roles make them relevant to both metabolic processes and control of cellular communication.
Their selective internalization properties make endocytic receptors relevant to targeted drug delivery and therapeutic strategies designed to bring chosen materials into cells. The same entry pathways help explain how receptor-binding pathogens gain access to cellular compartments. Studying receptor binding, trafficking, and sorting can therefore connect basic membrane biochemistry with treatment design and infection mechanisms.