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.
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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/
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