Related Experiment Video
Updated: Aug 20, 2025

NF-κB-dependent Luciferase Activation and Quantification of Gene Expression in Salmonella Infected Tissue Culture Cells
Published on: January 12, 2020
LUBAC and NF-κB trigger a nuclear response from mitochondria.
Junsheng Chen1, Thomas Simmen1
1Department of Cell Biology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.
Mitochondria are vital for innate immunity. A new study shows the linear ubiquiting chain assembly complex (LUBAC) remodels the outer mitochondrial membrane, aiding NF-κB nuclear transport during TNF signaling.
Area of Science:
- Cellular biology
- Immunology
- Mitochondrial research
Background:
- Mitochondria play a crucial role in cellular signaling pathways.
- Innate immune responses are tightly regulated by intracellular signaling networks.
- The outer mitochondrial membrane is a dynamic structure involved in cellular communication.
Purpose of the Study:
- To investigate the role of the linear ubiquiting chain assembly complex (LUBAC) in mitochondrial membrane remodeling.
- To elucidate the mechanism by which LUBAC influences innate immune signaling.
- To understand the transport of activated Nuclear Factor-kappa B (NF-κB) to the nucleus.
Main Methods:
- Utilized molecular biology techniques to study protein interactions.
- Investigated mitochondrial outer membrane dynamics.
- Analyzed NF-κB activation and nuclear translocation in response to Tumor Necrosis Factor (TNF) signaling.
Main Results:
- Demonstrated that LUBAC remodels the outer mitochondrial membrane.
- Showed that this remodeling facilitates the transport of activated NF-κB.
- Confirmed the process occurs in response to TNF signaling.
Conclusions:
- LUBAC-mediated remodeling of the outer mitochondrial membrane is essential for NF-κB nuclear import.
- Mitochondria act as critical signaling hubs in innate immunity.
- This mechanism highlights a novel pathway in TNF-induced immune responses.
More Related Videos
Related Concept Videos
NF-κB-dependent Signaling Pathway
NF-κB-dependent Signaling Mechanism
The...
Regulation of Nuclear Protein Sorting
Co-activators and Co-repressors
Signal Transduction: Overview
Typically, signal transduction involves three...
The Intrinsic Apoptotic Pathway
Translocation of Proteins into the Mitochondria
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...

