Alpha-helical Rod
Alpha-helical Rod - Related Videos
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.
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.
01:30
Detection of Phosphorylated Alpha-Synuclein Using Western Blotting
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2025
Add a loading buffer containing a detergent, a reducing agent, and a tracking dye.
03:25
Immunostaining of Neurons Treated with Alpha-Synuclein Aggregates
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2025
This video demonstrates the immunostaining of neurons treated with alpha-synuclein (αS) aggregates. The neurons are first treated with αS aggregates. They are then fixed, permeabilized, and treated with a blocking solution. Primary antibodies are added, followed by a fluorescently labeled secondary antibodies and a nuclear stain. The sample is then mounted and observed under a microscope.
FAQs
Within each alpha helix, hydrogen bonds form between backbone groups, helping maintain the helix’s regular shape. This stabilization is essential because the rod-like structure depends on helices remaining extended and ordered rather than collapsing into an irregular arrangement. The resulting structural continuity allows the protein region to contribute to cellular shape and mechanical organization.
Neighboring helices can pack through hydrophobic interactions and electrostatic contacts, producing a coiled-coil or another higher-order assembly. Hydrophobic interactions help position compatible nonpolar surfaces together, while electrostatic contacts influence how the helices align. These combined interactions connect individual helical elements into larger protein structures with greater organizational and mechanical significance.
Amino acid sequence helps determine how a protein folds and how its helices interact with one another. Those structural features influence properties such as elasticity, assembly, and mechanical stability. By relating sequence to folding and then to physical behavior, researchers can investigate how molecular organization contributes to the biological performance of elongated protein regions.
The length of an alpha-helical rod affects how it spans molecular space and contributes to structural arrangement. In structural and motor proteins, elongated regions can help maintain spacing, support force transmission, and resist deformation. Consequently, differences in length may influence how a protein organizes cellular components or withstands mechanical demands.
Alpha-helical rods occur in structural and motor proteins, including components of the cytoskeleton. In these settings, their organization supports cellular shape, molecular spacing, and the transfer of force. Their mechanical stability also helps cellular structures resist deformation, linking the physical properties of the protein to broader processes of cellular organization.
Researchers examine relationships among amino acid sequence, protein folding, assembly, and measurable properties such as elasticity and mechanical stability. They then connect those molecular features with roles in structural or motor proteins and the cytoskeleton. This approach helps explain how a protein’s architecture supports force transmission, spacing, and resistance to deformation in cells.