Alpha-helical Rod Domain
Alpha-helical Rod Domain - 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...
12:24
Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes
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Cited by 9 •
2014
We present a combination of Cryo-electron microscopy, lipid nanotechnology, and structure analysis applied to resolve the membrane-bound structure of two highly homologous FVIII forms: human and porcine. The methodology developed in our laboratory to helically organize the two functional recombinant FVIII forms on negatively charged lipid nanotubes (LNT) is described.
09:22
Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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2017
Here, we present a protocol to prepare and visualize secondary structures (e.g., fibers, toroidal architectures, and nano-spheres) derived from helical polycarbodiimides. The morphology characterized by both atomic force microscopy (AFM) and scanning electron microscopy (SEM) was shown to depend on molecular structure, concentration, and the solvent of choice.
09:07
Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
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Cited by 5 •
2018
We present a method for analyzing the 4-hydroxy-tamoxifen-dependent estrogen receptor alpha ligand-binding domain dimerization activity using the mammalian two-hybrid assay.
12:38
Structure of HIV-1 Capsid Assemblies by Cryo-electron Microscopy and Iterative Helical Real-space Reconstruction
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Cited by 8 •
2011
This article describes a method to obtain a three-dimensional (3D) structure of helically assembled molecules using cryo-electron microscopy. In this protocol, we use HIV-1 capsid assemblies to illustrate the detailed 3D reconstruction procedure for achieving a density map by the iterative helical real-space reconstruction method.
FAQs
Two stabilizing forces act at different structural levels in an alpha-helical rod domain. Backbone hydrogen bonds maintain the geometry of individual helices, whereas hydrophobic side-chain packing promotes close association between neighboring helices. This division of labor helps the region remain internally ordered and capable of forming higher-order assemblies, making it useful for structural support and molecular interactions.
Coiled-coil formation allows neighboring alpha helices to associate through hydrophobic side-chain packing. These associations can promote dimerization or support larger protein assemblies, so the rod domain functions beyond simple stabilization of one protein segment. The resulting organization provides a structural basis for building ordered protein complexes and interaction platforms.
Mutations can interfere with the organization or stability needed for alpha-helical rod domains to assemble properly. In intermediate filament proteins, disrupted assembly can weaken the cytoskeletal networks that normally resist mechanical stress. This connects a change in protein architecture with impaired cellular structure and, ultimately, reduced tissue integrity.
Within intermediate filament proteins, the rod domain helps organize individual subunits into strong cytoskeletal networks. Its assembly properties are therefore important at a scale larger than the single protein, because the resulting network contributes to resistance against mechanical stress. Studying this connection clarifies how molecular architecture supports cellular structure.
Research on these domains can link protein architecture with cellular organization, assembly behavior, and mechanical resistance. It can also reveal how mutations alter protein interactions and disrupt cytoskeletal structures. These outcomes make the domain a useful framework for understanding relationships between molecular structure, cell stability, and tissue-level integrity.
The association principles of alpha-helical rod domains can inform the design of engineered coiled-coil proteins. Because neighboring helices can support dimerization and larger assemblies, engineered versions may serve as controllable structural platforms. This creates relevance beyond natural cytoskeletal proteins, including biomedical and materials research focused on designed protein architecture.