Dear Eike, depending on what your structure is - you can try interface search in PISA (google on "ebi pisa"). Select the most "representative" interface in your complex (the one that makes the non-standard arrangement) and see whether there are similar interfaces in the PDB. It shouldn't be a too long list, you may then shorthen it to structures with given oligomeric state and finally check them by eye.
Cheers, Eugene. On Mon, 15 Jun 2009, Eike - Christian Schulz wrote:
Dear All, I solved a structure that has a very common tertiary structure motif but it appears as if the arrangement of the monomers is somewhat non-standart¹. Of course I performed a DALI search, which resulted in a great number of hits due to the similarity of the tertiary structure (Z¹s: 250 >8; 100 > 10). In order to check whether this arrangement that I see is something new I would like to perform a quaternary structure comparison. Is there any such tool available? A Google search wasn't very conclusive. Or is there a clever combination of available resources? Kind regards Eike
