Related Experiment Video
Updated: Jun 13, 2026
12:34
Methods for Measuring the Orientation and Rotation Rate of 3D-printed Particles in Turbulence
Published on: June 24, 2016
An imperfect rule for the particle roost.
Jason Hammonds1, Paul Spearman1
1Emory University and Children's Healthcare of Atlanta, 2015 Uppergate Drive, Atlanta, GA 30322, USA.
Cell Host & Microbe
|April 24, 2010
Summary
Tetherin, a protein that stops virus release, has a coiled-coil domain with unique structural features. These irregularities enhance its flexibility and antiviral function, offering new insights into viral restriction mechanisms.
Area of Science:
- Virology
- Cell Biology
- Structural Biology
Background:
- Tetherin is a host restriction factor that prevents the release of enveloped viruses, including HIV, by tethering virions to the cell surface.
- Understanding the molecular mechanisms of tetherin function is crucial for developing antiviral strategies.
Discussion:
- The coiled-coil domain of tetherin is essential for its antiviral activity.
- Irregularities within this domain were identified, suggesting a novel mechanism for flexibility and function.
Key Insights:
- The study reveals unique structural irregularities within the tetherin coiled-coil domain.
- These irregularities enhance the flexibility of the tetherin dimer, contributing to its ability to restrict virus release.
- This finding provides a deeper understanding of how tetherin functions at the molecular level.
Outlook:
- Further investigation into these structural features could lead to the design of novel antiviral therapies.
- Exploring similar mechanisms in other restriction factors may reveal broader principles of host-virus interactions.
Related Concept Videos
01:23Equilibrium Conditions for a Particle
When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
01:18First Law: Particles in Two-dimensional Equilibrium
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about the...
Newton's first law tells us about the...
01:08Hückel's Rule Diagram of π MOs: Frost Circle
The Frost circle or the inscribed polygon method is a graphical method for determining the relative energies of π molecular orbitals (MOs) for planar, fully conjugated, and monocyclic compounds. This method was first described by A. A. Frost and Boris Musulin in 1953.
A Frost circle is constructed by drawing a polygon whose number of edges is equal to the number of carbons of the given cyclic system, with one of the vertices pointing down. Then, a circle is drawn enclosing the polygon so that...
A Frost circle is constructed by drawing a polygon whose number of edges is equal to the number of carbons of the given cyclic system, with one of the vertices pointing down. Then, a circle is drawn enclosing the polygon so that...
01:10First Law: Particles in One-dimensional Equilibrium
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If we...
01:34Woodward–Hoffmann Selection Rules and Microscopic Reversibility
Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
01:20Midpoint Rule
Approximating areas under curved boundaries is a common problem in applied mathematics, particularly when an exact calculation is difficult or impractical. One effective numerical method for this purpose is the Midpoint Rule, which provides an estimate of the area under a curve by using rectangular approximations over a specified interval.Description of the Midpoint RuleThe Midpoint Rule begins by dividing the given interval into a number of equal subintervals. For each subinterval, the...