I too am not sure what is being asked but do the TMV helix and disk structures count? See for example slide 3 in
http://users.ipfw.edu/blumenth/Virology/Assembly.PDF
Colin
-----Original Message-----
From: CCP4 bulletin board [mailto:[log in to unmask]] On Behalf Of Tim Gruene
Sent: 05 June 2013 11:38
To: ccp4bb
Subject: Re: [ccp4bb] Helix forming proteins crystallizing as rings
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Dear Joern,
I am not sure this is what you have in mind: just yesterday I heard a talk from Oliver Einsle about FocA ion channels - look at PDB ID 4FC4, for example forming a (flat) pentamer, and let us know if this is what you mean.
Best,
Tim
On 06/04/2013 05:24 PM, Joern Krausze wrote:
> Dear all,
>
> can anyone provide me with examples for proteins that form a helical
> oligomer under physiological conditions and flat rings (basically a
> helix with a pitch of 0) in the crystal? I only know examples of the
> other way around.
>
> Thank you in advance.
>
> Joern
>
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