Related Experiment Video
Updated: Jun 1, 2026
10:05
In Vitro Analysis of PDZ-dependent CFTR Macromolecular Signaling Complexes
Published on: August 13, 2012
Analysis of CFTR interactome in the macromolecular complexes
Chunying Li1, Anjaparavanda P Naren
1Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI 48201, USA. cl@med.wayne.edu
Methods in Molecular Biology (Clifton, N.J.)
|May 20, 2011
Summary
Cystic fibrosis transmembrane conductance regulator (CFTR) is a chloride channel involved in salt and water transport. New methods cross-link CFTR to study its protein complexes and regulation in the plasma membrane.
Area of Science:
- Cell Biology
- Molecular Biology
- Physiology
Background:
- Cystic fibrosis transmembrane conductance regulator (CFTR) functions as a crucial chloride channel in epithelial cells, regulating salt and water transport.
- CFTR interacts with numerous proteins, suggesting a broader regulatory role beyond its ion channel activity.
- Interactions often involve the N- or C-terminal tails of CFTR, sometimes mediated by PDZ domain proteins.
Purpose of the Study:
- To describe novel methods for cross-linking CFTR into macromolecular complexes.
- To analyze the assembly and regulation of CFTR-containing complexes within the plasma membrane.
Main Methods:
- Development of cross-linking techniques to stabilize CFTR within its native cellular environment.
- Analysis of CFTR-containing macromolecular complexes to identify interacting partners and regulatory mechanisms.
Main Results:
- Successful cross-linking of CFTR into stable macromolecular complexes.
- Identification of proteins that assemble with CFTR in the plasma membrane.
Conclusions:
- The developed cross-linking methods enable detailed study of CFTR complex assembly and regulation.
- Understanding CFTR complex dynamics is essential for elucidating its multifaceted roles in epithelial physiology.
Related Concept Videos
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
02:26Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
01:30Assembly of Signaling Complexes
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
01:28Protein Translocation Machinery on the ER Membrane
The translocon complex situated on the ER membrane is the main gateway for the protein secretory pathway. It facilitates the transport of nascent peptides into the ER lumen and their insertion into the ER membrane.
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.
02:04Protein-protein Interfaces
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...