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what is the structure of H5N1


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#1 xxcici

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Posted 09 August 2014 - 07:45 AM

How to describe the virion of H5N1? For many virus, they are icosahedral, and others are helical. For H5N1, how to describe it?



#2 bob1

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Posted 09 August 2014 - 01:50 PM

Spherical.



#3 xxcici

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Posted 10 August 2014 - 12:57 PM

Spherical.

Thank you. But icosahedral virion is also spherical and is more accurate.



#4 bob1

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Posted 10 August 2014 - 04:16 PM

But influenza isn't an icosahedron... it is variable in shape, but roughly spherical. You could describe it as a "pleomorphic sphere" if you want technical terms.

 

Icosahedrons have a very defined shape, and it isn't spherical - it is a specific shape made up of 20 triangular faces, and a certain number of vertices and edges.  Icosahedron viruses may appear sort of spherical at low definition, but they are not spheres!



#5 xxcici

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Posted 10 August 2014 - 06:18 PM

I think the architecture of the nucleoprotein of H5N1 is helical symmetry, but this helical protein forms a roughly spherical structure, with an envelope on the outside. So, if I want to describe the structure of capsid for many different viruses, for some, I use icosahedral and for H5N1, I can use helical. 






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