Optogenetic Protein Mapping
Optogenetic Protein Mapping - Related Videos
08:49
Mapping the Cellular Distribution of an Optogenetic Protein Using a Light-Stimulation Grid
0 Views •
2024
This protocol involves transfecting cAMP sensors and bPAC-nLuc, an optogenetic protein, to accurately track its cellular distribution and response to light stimulation. The innovative approach of creating a cAMP response map using a point scanning system holds the potential for advancing research with optogenetic proteins in different fields.
09:39
Mapping Dysfunctional Protein-Protein Interactions in Disease
0 Views •
2025
Here, we present a protocol to enable the capture and identification of disease-specific protein-protein interactions from native cells and tissues using chemical probes and mass spectrometry. The resulting interaction datasets are analyzed through a dedicated web-based platform to reveal dynamic network dysfunctions and pathway alterations linked to disease.
06:06
Optogenetic Functional MRI
0 Views •
Cited by 15 •
2016
This protocol describes the steps and data analysis required to successfully perform optogenetic functional magnetic resonance imaging (ofMRI). ofMRI is a novel technique that combines high-field fMRI readout with optogenetic stimulation, allowing for cell type-specific mapping of functional neural circuits and their dynamics across the whole living brain.
01:42
Microtubule Associated Proteins (MAPs)
0 Views •
2023
Microtubule function and architecture are regulated by an array of specialized proteins called microtubule-associated proteins or MAPs. These proteins are widespread across different organisms and have conserved protein motifs, like the multi-TOG domain for tubulin binding found in the CLASP family of MAPs. Some MAPs are lineage-specific based on their conserved domains. Their functions depend upon the cytoskeletal architecture and cell type they are located within. In-plant cells, a specific...
07:54
Heterogeneity Mapping of Protein Expression in Tumors using Quantitative Immunofluorescence
0 Views •
Cited by 27 •
2011
Here we describe a method to quantify molecular heterogeneity in histological sections of tumor material using quantitative immunofluorescence, image analysis, and a statistical measure of heterogeneity. The method is intended for use in clinical biomarker development and analysis.
FAQs
Illumination induces a conformational change in a genetically encoded light-sensitive domain. That structural shift can expose an interaction site or activate a modular binding partner, allowing a target protein to be recruited at a selected time and location. The resulting redistribution can then be followed by microscopy to connect induced protein positioning with changes in cellular activity.
The timing of illumination lets researchers initiate a molecular event at a defined moment rather than merely observe an event that has already occurred. Microscopy can then record protein movement and activity during the response. This temporal control helps distinguish whether a protein relocation or interaction is associated with a downstream cellular process, strengthening causal interpretation.
Fluorescent tags provide a way to visualize the location and movement of proteins during the experiment. When paired with light-sensitive domains or modular binding partners, they allow microscopy to connect an induced molecular interaction with its spatial distribution. This combination is especially useful when protein activity depends on movement between cellular regions or on recruitment to a specific site.
Spatial control allows molecular events to be examined in defined cells or subcellular regions rather than averaged across the entire cell. Researchers can therefore assess how protein placement relates to local signaling, membrane trafficking, or cytoskeletal organization. Observing these events at selected locations can reveal relationships that broader biochemical measurements may obscure.
A typical workflow combines genetically encoded light-sensitive domains with fluorescent tags or modular binding partners in the proteins or systems being studied. Researchers then illuminate the selected cellular region or sample to trigger the intended conformational change or recruitment event. Microscopy records subsequent protein movement and activity for analysis of location-function relationships.
The approach can be applied to protein interactions, signaling pathways, membrane trafficking, and cytoskeletal organization. In each case, controlled illumination creates a defined molecular perturbation, while microscopy follows the resulting redistribution or activity. This makes it possible to examine how local protein interactions contribute to larger cellular processes rather than studying protein abundance or position alone.
By controlling when and where a protein interaction or recruitment event begins, researchers can compare cellular behavior before and after a defined molecular change. Microscopy supplies the corresponding record of movement and activity. This combination helps separate events that initiate a process from changes that simply accompany it, providing stronger evidence for functional links between protein location and cellular response.