Related Experiment Video
Updated: Aug 4, 2025
Detecting, Visualizing and Quantitating the Generation of Reactive Oxygen Species in an Amoeba Model System
Published on: November 5, 2013
Proximity Protein Labeling In Dictyostelium With Engineered Ascorbic Acid Peroxidase 2
Jamie A Takashima1,2, Helena A Woroniecka1, Pascale G Charest1,3
1Department of Chemistry and Biochemistry, University of Arizona, Tucson AZ, USA.
This study introduces a new proximity labeling method using engineered ascorbic acid peroxidase 2 (APEX2) for mapping dynamic protein networks in Dictyostelium. This technique enhances understanding of cellular signaling pathways by identifying transient protein interactions.
Area of Science:
- Cellular Biology
- Proteomics
- Biochemistry
Background:
- Understanding cellular processes requires mapping dynamic protein networks.
- Protein interactions in cellular signaling are often weak or transient, posing challenges for study.
- Existing methods struggle to capture the spatial and temporal dynamics of protein interactions.
Purpose of the Study:
- To adapt and validate the APEX2 proximity labeling method for use in Dictyostelium.
- To demonstrate the method's utility in identifying protein interaction partners.
- To expand the proteomics toolbox for Dictyostelium research.
Main Methods:
- Utilized engineered ascorbic acid peroxidase 2 (APEX2) for proximity labeling in Dictyostelium.
- Applied the method to study the cAMP receptor cAR1.
- Identified labeled proteins using mass spectrometry.
Main Results:
- Successfully implemented the APEX2 proximity labeling protocol in Dictyostelium.
- Demonstrated the identification of interacting proteins, including transient and weak interactions.
- Expanded the capabilities for proteomic analysis in Dictyostelium.
Conclusions:
- The APEX2 proximity labeling method is effective for studying protein networks in Dictyostelium.
- This technique provides spatial and temporal resolution for identifying protein interactions.
- The method offers a valuable tool for diverse biological studies in Dictyostelium.
More Related Videos
08:56Visualizing the Interaction Between the Qdot-labeled Protein and Site-specifically Modified λ DNA at the Single Molecule Level
Published on: July 17, 2018
06:09Studying the Protein Quality Control System of D. discoideum Using Temperature-controlled Live Cell Imaging
Published on: December 2, 2016
Related Concept Videos
03:31Labeling DNA Probes
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
01:19Protein Dynamics in Living Cells
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...