P75ntr Receptor Binding
P75ntr Receptor Binding - Related Videos
06:27
Competitive Binding Assay to Identify Compounds Disrupting Receptor-Ligand Interactions
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2025
In this video, we describe a flow cytometry-based competitive binding assay to detect the interactions between the CXC Chemokine Receptor 4 (CXCR4) and its fluorescently-labeled natural ligand CXC Chemokine Ligand 12 (CXCL12), in the presence of a CXCR4-targeting small molecule. Incubating CXCR4-expressing cells with lower small molecule concentrations allows CXCR4-CXCL12 binding to some extent, which progressively declines upon a gradual increase in small molecule concentrations.
10:13
Measuring G-protein-coupled Receptor Signaling via Radio-labeled GTP Binding
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Cited by 11 •
2017
Guanosine triphosphate (GTP) binding is one of the earliest events in G-Protein-Coupled Receptor (GPCR) activation. This protocol describes how to pharmacologically characterize specific GPCR-ligand interactions by monitoring the binding of the radio-labeled GTP analog, [35S]guanosine-5'-O-(3-thio)triphosphate ([35S]GTPγS), in response to a ligand of interest.
08:40
An ELISA Based Binding and Competition Method to Rapidly Determine Ligand-receptor Interactions
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Cited by 40 •
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The presented protocols describe two enzyme-linked immunosorbent assay (ELISA) based techniques for the rapid investigation of ligand-receptor interactions: The first assay allows the determination of dissociation constant between ligand and receptor. The second assay enables a rapid screening of blocking peptides for ligand-receptor interactions.
11:07
Biochemical Reconstitution of Steroid Receptor•Hsp90 Protein Complexes and Reactivation of Ligand Binding
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Cited by 1 •
2011
An in vitro method for preparing functional glucocorticoid receptor (GR)•hsp90 protein complexes from purified proteins and cellular lysates is described. The method utilizes immunoadsorption of recombinant GR followed by salt-stripping and protein complex reconstitution. The importance of cofactors and buffer conditions are discussed, as are potential method applications.
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.
FAQs
Ligand engagement at the receptor’s extracellular cysteine-rich domain can alter how p75NTR associates with co-receptors, including Trk proteins and sortilin. These partnerships help determine which downstream response becomes prominent. Consequently, the same receptor can participate in signaling that supports neuronal survival and neurite growth or signaling associated with apoptosis and pruning.
The biological consequence of p75NTR engagement depends on both the form of the ligand and the cellular context in which binding occurs. These variables influence receptor partnerships and downstream pathway activation, so ligand recognition does not predict a single universal response. This context dependence is essential when interpreting neurotrophin effects in neuronal systems.
The extracellular cysteine-rich domain provides the site involved in recognizing neurotrophins and related ligands. Changes initiated through this domain can affect receptor interactions beyond the initial binding event, particularly associations with co-receptors. Studying this region therefore connects molecular recognition with later signaling outcomes rather than treating ligand attachment as an isolated step.
Binding assays can help distinguish which ligands recognize p75NTR and assess ligand selectivity. Structural studies examine the molecular basis of receptor-ligand interactions, while cell-based signaling experiments show how those interactions relate to pathway activation. Using these approaches together links molecular binding behavior with receptor partnerships and functional neuronal responses.
This interaction is relevant when researchers study neural development, neuronal injury, neurodegeneration, or therapeutic modulation of neurotrophin signaling. In each setting, experiments can examine whether ligand selectivity, co-receptor partnership, or pathway activation changes the resulting neuronal response. The findings help relate receptor-level mechanisms to survival, neurite growth, apoptosis, or pruning.
Experiments can reveal whether a ligand preferentially engages p75NTR, which co-receptor partnerships accompany that engagement, and which signaling pathways become activated. Those results help explain why a cellular system exhibits growth-supporting responses or instead shows apoptosis and pruning. They also provide mechanistic context for strategies designed to modulate neurotrophin signaling.