Protein structures might contain errors independently if they have been created from experimental information or from modeling. Therefore it is necessary to have some possibility to check for errors in a given model independent on how this model was created. The methods used to predict the structure of a protein can be divided into two groups, depending on if they are use physico chemical information or statistical information.
Procheck is a program that checks the geometry of a protein structure. The following checks are made:
WHAT IF is a versatile protein structure analysis program that can be used for structure verification, energy calculations, molecular graphics, etc. It can be used to create automatic servers for protein verification as in the what check server
Errat and Verify-3D are bases on the statistical distribution of atoms and residues respectively.