Proline puckering.


Checks if proline pucker falls in a normal range.


Proline residues are listed that have a puckering amplitude that is outside normal ranges. Puckering parameters were calculated by the method of Cremer and Pople. Normal proline rings have a puckering amplitude Q between 0.20 and 0.45 Angstrom. If Q is lower than 0.20 Angstrom for a proline residue, this could indicate disorder between the two different normal ring forms (with C-gamma below and above the ring, respectively). If Q is higher than 0.45 Angstrom something could have gone wrong during the refinement.

Warnings by this server are not error indicators, but merely hints that you might want to look at those prolines yourself.

Either Choose a pdb-file,
Or Choose your own file

See our validation related articles for more background details regarding the validation servers. See also the WWW based validation explanation. If you have detected any error, or have any question or suggestion, please send an Email to Gert Vriend.
Roland Krause, Maarten L Hekkelman, Jens E Nielsen, Gert Vriend.

Last modified Mon Jan 29 12:33:00 2018