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Calculate Normal Modes Overlap Coefficient

(Needs 2 PDB structures)

In this version, there is no need to have previously superimposed the 2 PDB files. The superposition will be done locally by Profit. Obviously, the two PDB files should have the same number of (CA) atoms.

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Job title: (Only alphanumerical characters)

PDB File of the first form of the molecule (CA)
Ex: PDB file

PDB File of the second form of the molecule (CA)
Ex: PDB file


  • The PDB files should contain only CAs ; They should have exactly the same number of residues.
    The superposition will be done by Profit. The calculation will not work efficiently for PDB files with more than 3000 CA atoms. In this case, one should resort to the RTB method and work with Blocks of residues (YHS). Go and visit Elnemo web site for a web-interfaced implementation of this (see Links option).

  • The output files will consist of 2 postscript files showing the overlap coefficients (dot product) between the eigenvectors of the first 100 lowest-frequency modes and the set of difference vectors between the two forms. As a check, the contribution of the first 6 modes should be exactly zero, if the superposition has been done correctly. The calculation is done twice: once while using the first form to calculate the normal modes and another time while using the second form to calculate the normal modes.
    N.B. The cumulated score is also shown.

  • The job title is for internal use only, but note that it will show up in the public job queue (but your results will not be public). Avoid using a blank line here, otherwise the second plot will not be named properly and you won't be able to download it.

  Marc Delarue http://lorentz.dynstr.pasteur.fr
Page last modified 12:08 February 18, 2015.