Hub Domain Structure
Hub Domain Structure - Related Videos
02:26
Conservation of Protein Domains Over Different Proteins
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2020
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms. A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
11:31
Crystal Structure of the N-terminal Domain of Ryanodine Receptor from Plutella xylostella
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Cited by 1 •
2018
In this article, we describe the protocols of protein expression, purification, crystallization and structure determination of the N-terminal domain of ryanodine receptor from diamondback moth (Plutella xylostella).
13:02
Production, Crystallization, and Structure Determination of the IKK-binding Domain of NEMO
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Cited by 5 •
2019
We describe protocols for the structure determination of the IKK-binding domain of NEMO by X-ray crystallography. The methods include protein expression, purification and characterization as well as strategies for successful crystal optimization and structure determination of the protein in its unbound form.
02:01
Purification of Bacteria-Derived Recombinant P Domain Proteins of Human Norovirus
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2025
Source: Leuthold, M. M., et al. Production of Human Norovirus Protruding Domains in E. coli for X-ray Crystallography. J. Vis. Exp. (2016).This video demonstrates the purification of recombinant human norovirus P domain using size exclusion chromatography, highlighting the separation of the target protein from higher and lower molecular weight impurities based on differential pore accessibility. The process is monitored by UV absorbance and confirmed through SDS-PAGE analysis of eluted...
06:45
Transmembrane Domain Oligomerization Propensity determined by ToxR Assay
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Cited by 7 •
2011
An efficient procedure to assess the oligomerization propensity of single-pass transmembrane domains (TMDs) is described. Chimeric proteins consisting of the TMD fused to ToxR are expressed in an E. coli reporter strain. TMD-induced oligomerization causes dimerization of ToxR, activation of transcription and production of the reporter protein, -galactosidase.
FAQs
Specificity arises from the arrangement of binding interfaces across the folded region. These interfaces help determine which molecular partners can associate, while multiple sites allow one protein region to coordinate several interactions at once. This organization connects separate molecular events within signaling pathways, protein complexes, and regulatory networks rather than treating each interaction as an isolated process.
Flexible linkers can position interaction sites and permit conformational changes as a complex assembles. Their movement may help bring partners into suitable arrangements without requiring every interaction site to remain rigidly fixed. Consequently, linker behavior contributes to how a hub region coordinates partners and adapts its organization during molecular complex formation.
A single-interaction region primarily supports one molecular association, whereas a hub domain structure coordinates multiple partners through several binding interfaces. This multivalent organization allows signals or regulatory effects to be integrated within a shared protein context. Studying that arrangement can therefore reveal how cellular activities depend on coordinated interaction networks rather than independent pairwise contacts.
Structural and biochemical analysis can identify how interaction interfaces function and how partners are organized within a hub region. These approaches also help examine conformational changes and complex assembly when flexible linkers contribute to positioning. The resulting information clarifies interaction mechanisms and provides a basis for interpreting how altered organization affects cellular signaling or regulation.
Mutations can alter folded domains, binding interfaces, or flexible regions that position interaction sites. Such changes may interfere with partner association, complex assembly, or the conformational adjustments needed for coordinated interactions. Examining these structural effects helps connect molecular changes with disrupted cellular organization and supports investigation of disease mechanisms associated with faulty protein interaction networks.
This topic is particularly relevant to studies of signaling pathways, protein complexes, and regulatory networks, where several molecular interactions must operate together. Structural and biochemical investigation can show how these systems integrate information, identify interaction mechanisms, and reveal consequences of disrupted organization. The same findings may also help evaluate potential therapeutic targets linked to disease mechanisms.