I am not sure if this is exactly what you are asking about but 1nig in pdb sounds awfully like what you are describing.
Also take a look at J Struct Funct Genomics. <javascript:AL_get(this,%20'jour',%20'J%20Struct%20Funct%20Genomics.');> 2004;5(4):231-40 for more detailed description of the structure. Cheers, Nukri Ruslan Sanishvili (Nukri), Ph.D. GM/CA-CAT Biosciences Division, ANL 9700 S. Cass Ave. Argonne, IL 60439 Tel: (630)252-0665 Fax: (630)252-0667 [email protected] ________________________________ From: CCP4 bulletin board [mailto:[email protected]] On Behalf Of Xie Jiabao Sent: Saturday, October 03, 2009 10:09 PM To: [email protected] Subject: [ccp4bb] coiled coil question Dear all, Is anyone aware of a structure where the individual alpha helical chains of a coiled coil are related by a crystallographic axis? Or does anyone know of a coiled coil structure (dimer or higher order oligomer) that is perfectly symmetric at least in terms of the protein backbone or alpha carbon atoms? Thanks and best regards, Xie
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