Alpha Helix Bundles
Alpha Helix Bundles - Related Videos
01:27
The DNA Helix
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2020
Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a double helix. The discovery of the structure of DNA occurred incrementally over nearly a century, representing one of the most famous and captivating stories in the history of science.DNA Structure in DetailEach strand of DNA consists of subunits called...
01:27
The DNA Helix
0 Views •
2026
Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a double helix. The discovery of the structure of DNA occurred incrementally over nearly a century, representing one of the most famous and captivating stories in the history of science.DNA Structure in DetailEach strand of DNA consists of subunits called...
01:07
The DNA Helix
0 Views •
2023
Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...
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.
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Hydrophobic side chains tend to cluster at the contact surface between helices, where they remain shielded from water. This arrangement creates a cohesive interior, while hydrogen bonds within each helix preserve helical shape. Salt bridges and van der Waals contacts can further reinforce the interface, giving the bundle additional structural stability.
The relative orientation of helices determines which side chains meet and how the bundle presents its surfaces to other molecules. Consequently, helix packing can influence molecular interactions and activity. In proteins involved in signaling, DNA binding, or movement, changes in this arrangement may alter how the protein performs its biological role.
Salt bridges provide additional interactions between oppositely charged side chains, whereas van der Waals contacts arise from close packing of atoms at the helix interface. Neither replaces the hydrophobic core or intr helical hydrogen bonds. Instead, these interactions reinforce the existing arrangement and help maintain a stable three-dimensional protein unit.
These structures occur in several functional protein settings, including membrane proteins, DNA-binding proteins, signaling molecules, and molecular motors. Their importance comes from the connection between helix arrangement and protein behavior. The same general structural strategy can therefore support communication, molecular recognition, membrane-associated roles, or movement, depending on the surrounding protein.
Researchers can examine how hydrophobic side chains are distributed relative to water, how the helices are oriented, and which stabilizing contacts occur at their interfaces. They can also assess intr helical hydrogen bonding, salt bridges, and van der Waals contacts. Together, these features help interpret bundle stability and possible effects on protein activity.
Studying these structures helps researchers interpret how proteins acquire and maintain folded arrangements. It also provides a framework for understanding disease-related mutations, particularly when altered residues could affect helix packing or stabilizing interactions. In protein design, the same structural knowledge supports development of synthetic proteins with tailored properties and intended functions.