Host Cell Receptor Binding
Host Cell Receptor Binding - Related Videos
04:42
Visualization of Viral Double-Stranded RNA and Host Pattern Recognition Receptors in Infected Epithelial Cells
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2026
Source: Mateer, E., et al., Confocal Imaging of Double-Stranded RNA and Pattern Recognition Receptors in Negative-Sense RNA Virus Infection. J. Vis. Exp. (2019)This video demonstrates the confocal imaging of viral double-stranded RNA (dsRNA) and cytoplasmic pattern recognition receptors (PRRs) in virus-infected epithelial cells. It highlights how antibody-based fluorescent labeling reveals the interaction between viral replication intermediates and host immune sensors.
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.
04:15
Extracting Host Cell Lysate from Infected Host Cells Cultured in a Permeable Membrane System
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2025
This video demonstrates a permeable membrane insert system to investigate the impact of bacterial toxins on host cells in a controlled and isolated manner. This approach allows for the selective exposure of the cells to the toxins while maintaining a physical separation that mimics the natural host-pathogen interaction.
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.
FAQs
Three linked factors shape the interaction: molecular complementarity, affinity, and local conditions. Complementarity allows the interacting surfaces or chemical features to fit, while affinity describes how strongly they associate. Local conditions can alter that association. Together, these properties influence whether receptor binding stabilizes a receptor sufficiently to initiate a cellular response.
Binding can stabilize the receptor in a different conformation, meaning its molecular shape or arrangement changes. That altered state may trigger intracellular signaling and subsequent changes in gene expression. In other cases, attachment to a receptor can enable cellular entry. Thus, the same general interaction can have signaling or entry-related consequences.
The same binding principles can be examined across hormones, signaling ligands, and pathogen-associated proteins, but the scientific question differs. Hormone or ligand interactions are relevant to cell communication, whereas pathogen-associated interactions help explain infection or immune recognition. This distinction helps researchers interpret binding as part of normal regulation or host-pathogen biology.
These studies can identify molecular targets involved in a cellular response and clarify how altered interactions contribute to disease mechanisms. By connecting a particular binding event with signaling, cellular entry, or immune recognition, investigators can frame a more specific explanation of disease-related biology and select interactions for therapeutic investigation.
In infection research, examining attachment between a pathogen-associated protein and a host receptor helps relate molecular recognition to possible cellular entry. In immune biology, receptor interactions help explain how cells recognize relevant molecular signals. These perspectives connect receptor-level events with broader biological outcomes, including infection processes and immune responses.
Receptor-binding analysis can guide therapies in two directions. A drug or vaccine may be designed to block a defined interaction when the goal is to prevent an unwanted cellular response or entry. Alternatively, an intervention may enhance a selected response. The binding interaction therefore provides a molecular target for directing treatment design.