Dear all, I would like to search the PDB for protein structures with the conditions that the biological unit consists of a homo-tetramer and that the monomers are related by a fourfold rotation, i.e. point group 4.
The rcsb.org server allows to specify the number of chains in the biological unit, but no symmetry operation can be given. The PISA search from the PDBe allows to search for the multimeric state and the symmetry number. This returns however also structures that are not related by fourfold symmetry, e.g. point group 222. I assume that an elegant way to carry out the search would be to take advantage of the REMARK 350 generated by PISA (or the author). Any suggestions how to exploit this, also without downloading the whole PDB (or pointers to other web servers that can do the job) would be greatly appreciated. Thanks, Tobias. -- ___________________________________________ Dr. Tobias Beck Dept. Structural Chemistry Georg-August University Goettingen Tammannstr. 4 37077 Goettingen, Germany phone: +49 551 39-3075 fax: +49 551 39-22582 web: http://shelx.uni-ac.gwdg.de/tbeck/ ___________________________________________
