Hsp90 Dimer
Hsp90 Dimer - Related Videos
11:07
Biochemical Reconstitution of Steroid Receptor•Hsp90 Protein Complexes and Reactivation of Ligand Binding
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Cited by 1 •
2011
An in vitro method for preparing functional glucocorticoid receptor (GR)•hsp90 protein complexes from purified proteins and cellular lysates is described. The method utilizes immunoadsorption of recombinant GR followed by salt-stripping and protein complex reconstitution. The importance of cofactors and buffer conditions are discussed, as are potential method applications.
09:39
Exploring Biomolecular Interaction Between the Molecular Chaperone Hsp90 and Its Client Protein Kinase Cdc37 using Field-Effect Biosensing Technology
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Cited by 11 •
2022
Field-effect biosensing (FEB) is a label-free technique for detecting biomolecular interactions. It measures the electric current through the graphene biosensor to which the binding targets are immobilized. The FEB technology was used to evaluate biomolecular interactions between Hsp90 and Cdc37 and a strong interaction between the two proteins was detected.
03:32
Amplified Luminescent Proximity Homogeneous Assay: A Bead-Based Proximity Assay to Screen Small Molecules Inhibiting Protein-Protein Interactions
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2025
In this video, we demonstrate the amplified luminescent proximity homogeneous assay—a bead-based proximity assay. It utilizes homogeneously-sized acceptor and donor beads, immobilized with two proteins that tend to interact to screen potential small molecules inhibiting protein interactions.
06:43
Graphene Biosensor-Based Field-Effect Biosensing to Detect Protein-Protein Interactions
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2025
In this video, we describe the field-effect biosensing (FEB) technology to detect and quantify protein-protein interactions. The target proteins immobilized on the graphene biosensor interact with analyte proteins in solution, resulting in electrical current alterations in the FEB system. This change in the electrical response indicates the binding affinity between the proteins.
09:39
Mapping Dysfunctional Protein-Protein Interactions in Disease
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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.
FAQs
ATP binding and hydrolysis act as a chemical cycle that shifts the Hsp90 dimer between functional conformations. These structural transitions help coordinate client-protein handling and maturation rather than simply supplying energy. Examining the cycle allows biochemists to connect nucleotide state with changes in chaperone activity, providing a mechanistic basis for understanding how Hsp90 supports protein homeostasis.
The three regions contribute different functions that must operate together. The N-terminal domain binds ATP, the middle domain participates in client regulation, and the C-terminal region joins the two subunits into a dimer. This division of labor links nucleotide-dependent conformational changes with client-protein control, helping explain how the complex converts molecular interactions into functional maturation.
Dimerization creates the two-subunit framework required for coordinated Hsp90 activity. The C-terminal regions maintain this association, while ATP-driven conformational changes alter the functional state of the assembled complex. Studying the dimer therefore provides information that would be missed by examining isolated subunits, particularly when relating structural organization to client regulation and protein stability.
Co-chaperone interactions are an important regulatory layer in the Hsp90 system. They can be examined alongside the ATP-binding cycle to determine how partner proteins influence client handling and the functional state of the dimer. This relationship matters because Hsp90 activity depends not only on its own domains, but also on interactions that shape client-protein maturation.
Biochemical studies can connect the dimer’s domain organization, ATP cycle, and client interactions with the maintenance of protein stability, folding, and activity. They also help relate Hsp90 behavior to broader processes such as signal transduction and stress responses. This makes the complex a useful model for investigating how cells preserve functional proteins under changing conditions.
The Hsp90 dimer supports numerous disease-associated client proteins, making its regulatory cycle relevant to therapeutic research. Investigators can focus on ATP binding and hydrolysis, client regulation, or co-chaperone interactions when considering ways to alter chaperone function. Understanding these mechanisms helps identify intervention points while preserving a biochemical link between inhibitor action and client-protein outcomes.