Effector Binding
Effector Binding - Related Videos
12:23
Analysis of Yersinia enterocolitica Effector Translocation into Host Cells Using Beta-lactamase Effector Fusions
0 Views •
Cited by 5 •
2015
Effector translocation into host cells via a type III secretion system is a common virulence strategy among gram-negative bacteria. A beta-lactamase effector fusion based assay for quantitative analysis of translocation was applied. In Yersinia infected cells, conversion of a FRET reporter by the beta-lactamase is monitored using laser scanning microscopy.
08:39
Electroporation of Functional Bacterial Effectors into Mammalian Cells
0 Views •
Cited by 7 •
2015
Electroporation was used to insert purified bacterial virulence effector proteins directly into living eukaryotic cells. Protein localization was monitored by confocal immunofluorescence microscopy. This method allows for studies on trafficking, function, and protein-protein interactions using active exogenous proteins, avoiding the need for heterologous expression in eukaryotic cells.
04:41
Introduction of Bacterial Effector Proteins into Mammalian Cells by Electroporation
0 Views •
2025
In this video, we demonstrate the introduction of bacterial effector proteins into mammalian cells by electroporation. The intracellular localization of the bacterial effector proteins is detected by confocal microscopy following staining with specific fluorophore-conjugated antibodies.
02:12
Co-Infiltration Assay for Screening Pathogen Effectors that Suppress Plant RNA Silencing
0 Views •
2026
Source: Shi, J., et al. Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens. J. Vis. Exp. (2020)This video demonstrates a co-infiltration assay for identifying pathogen effector proteins that suppress RNA silencing in Nicotiana benthamiana 16c. A fluorescent reporter and a candidate effector gene are delivered into plant leaves via Agrobacterium. Normally, RNA silencing degrades reporter transcripts, reducing fluorescence. Suppressor effectors...
02:20
Monitoring Bacterial Infection and Effector Protein Delivery in Plant Cells
0 Views •
2025
Source: Lee, H. et. al., Split Green Fluorescent Protein System to Visualize Effectors Delivered from Bacteria During Infection. J. Vis. Exp. (2018)This video demonstrates a method for monitoring bacterial infection and effector protein delivery in plant cells using split superfolder green fluorescent protein (sfGFP) complementation combined with confocal microscopy. The approach enables precise visualization of effector translocation into the host cell cytosol.
FAQs
Specificity arises when the effector and target present matching chemical and structural features. Hydrogen bonds, electrostatic forces, hydrophobic contacts, and shape complementarity collectively favor some interactions over others. Because several forms of complementarity can contribute at once, changes to either binding partner may alter target recognition and the resulting biological response.
Binding may change the target’s conformation, meaning its three-dimensional arrangement shifts in response to the interaction. It may also help assemble a signaling complex containing multiple components. These outcomes matter because the target can gain, lose, or redirect activity, linking a molecular interaction to downstream regulation in a cell.
Mutations can change the chemical or structural features that support recognition, while drugs can modify the interaction or the target’s behavior. Evaluating these changes helps researchers determine whether altered binding affects pathway regulation. This connects molecular-level variation with functional consequences in processes such as signaling, metabolism, or immune responses.
A binding study can help identify the molecular target of an effector and clarify how that interaction regulates activity. Researchers can then examine whether the interaction changes target behavior, induces a conformational shift, or contributes to a larger signaling complex. These findings explain how regulation operates at the molecular level.
Effector binding provides a framework for understanding regulation in immune responses, gene expression, metabolism, and cell communication. In each setting, the important question is how a selective interaction changes the activity or behavior of a target. This perspective helps connect molecular recognition with pathway-level outcomes rather than treating binding as an isolated event.
Comparing the normal interaction with interactions affected by mutations or drugs can reveal which molecular features control target behavior. The resulting evidence may identify regulatory targets, explain changes in pathway activity, and show how an intervention influences cellular function. Such analysis is useful for linking chemical interactions to biological outcomes.