Dear Steven,

just to add up a small bit to Maciek's reply, you may find some examples how to use the RDKit MMFF94 C++ API in Code/ForceField/MMFF/testMMFFForceField.cpp and in Code/ForceField/MMFF/testMMFFHelpers.cpp. All of the constraints are available from C++, a search for "fixed atoms" in Code/ForceField/MMFF/testMMFFForceField.cpp will point you to an example how to set fixed atoms.

To minimize a ligand in the context of a protein pocket I would combine the ligand and the relevant residues in a ROMol, set the desired contraints and then minimize. Please do not hesitate to get back to me if you run into trouble.

Cheers,
p.


On 01/04/2016 16:29, Steven Combs wrote:
Hi,

Is it possible to do a minimization in mmFF in context of two small-molecules or a single small molecule and sidechains from a binding pocket? From what I gather, I have two options:

1) Make a single RWMol object with the ligand and all residues from the binding pocket, then run mmFF on the combine molecule. The steps would look like this
   -use combineMols() for all residues
   -use mmFF on the complex

2) Use a hacked version of MCS from here: http://rdkit.blogspot.com/2013/12/using-allchemconstrainedembed.html


Is there a better way of doing this? I am using the C++ api.

Steven Combs


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