OpEn-Tag-A Customizable Optogenetic Toolbox To Dissect Subcellular Signaling

Area of Science:

• Cell Biology
• Molecular Biology
• Optogenetics

Background:

• Subcellular localization of signaling molecules is crucial for organizing cellular signaling networks.
• Precisely controlling protein localization is essential for understanding signaling dynamics.

Purpose of the Study:

• To introduce OpEn-Tag, a modular optogenetic toolbox for spatiotemporal control of endomembrane protein localization.
• To enable the investigation of signaling pathway organization and activity through precise localization manipulation.

Main Methods:

• Developed a two-component system: targeting peptides fused to CIBN for endomembrane localization and cryptochrome 2 fused to proteins of interest.
• Utilized blue light to induce specific protein recruitment to targeted endomembranes.
• Combined OpEn-Tag with growth factor stimulation and dual membrane anchors to study multilayered signaling.

Main Results:

• Demonstrated the ability of OpEn-Tag to precisely alter the subcellular localization of proteins of interest.
• Successfully investigated multilayered signal transduction pathways, exemplified by the protein kinase AKT.
• Showcased the system's modularity and adaptability for various endomembrane targeting strategies.

Conclusions:

• OpEn-Tag provides a powerful optogenetic tool for dissecting signaling networks by controlling protein localization.
• The toolbox offers spatiotemporal resolution for studying dynamic cellular processes and complex signaling cascades.
• OpEn-Tag facilitates research into fundamental cell biology and signal transduction mechanisms.