A program to build the crystal environment of a given PDB file and analyse crystal contacts according to contact surfaces.

CryCo program uses PDBSET software from the CCP4 package (CCP4 home page) to construct symmetry related molecules. It then places them within one unit cell, constructs the adjucent cells and uses LPC/CSU software (Sobolev et al,1999) to calculate atomic contacts. Visualization options are provided by: Chime plug-in  for PC/MAC,  Chime plug-in  for Linux  or with  Jmol  molecular viewer.
        SPACE - Link to tools for protein Structure Prediction and Analysis based on Complemenrtarity and Environment.

Choose PDB ID code    
or your own file1 

Enter threshold distance 2    (by default, 10 Å)

Click here to start     (Patience; the operation could take a few minutes)



1. If you analyse your own data, your file must include HEADER line and the full set of CRYST1 lines in PDB format.
2.The output will include residues from symmetry related molecules only if their CA atoms are located closer than the threshold chosen to any CA of the molecule in the PDB entry.


Reference: Eyal E, Gerzon S, Potapov V, Edelman M, Sobolev V. (2005) The limit of accuracy of protein modeling: influence of crystal packing on protein structure. J. Mol. Biol., 351, 431-442 (PubMed).
Questions and comments to Eran Eyal - eran.eyal@weizmann.ac.il
Web site organized by Sergey Gerzon