Analyze ligand geometries using the Cambridge Structural Database (CSD): Difference between revisions

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(Created page with "Often, it is useful to determine if a torsion or conformer is not energetically favourable. This can be accomplished from an ab initio QM calculation but in the Shoichet Lab, ...")
 
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Often, it is useful to determine if a torsion or conformer is not energetically favourable. This can be accomplished from an ab initio QM calculation but in the Shoichet Lab, it is more common to rule out unfavourable conformers by comparing a questionable torsion to the deposited structures in the CSD.
Written by Chase Webb 20190521


To use the CSD, first open it by running the following command:
The generation of torsion angle distributions to determine conformational preference about single rotatable bonds is one of the most common uses of the CSD. This tutorial illustrates how '''Mogul''', part of the CSD software can be used to rapidly determine the torsion angle preferences of substituted oxamides by inspecting occurrences of this motif in the CSD.
/nfs/soft/csd/csd-2018/CSD_2018/bin/mercury


Next,
Source the current environment for CSD-2019
source /nfs/soft/csd/csd-2019/env.csh
 
Open mogul interface by running the following command:
  /nfs/soft/csd/csd-2019/CSD_2019/bin/mogul
 
If prompted for the license, it lives here:
/nfs/soft/csd/csd-2019/CSD_2019/csd_licence.dat
 
You can save a copy in your home directory so that you are not prompted for the location every time you use the CSD.
 
In the CCDC Mogul 1.8.1 interface, import smiles by clicking load, or draw the motif you are interested in assessing by clicking on the Draw button to bring up a drawing window.
 
Hit search to submit the query and you should find see a histogram of the reported torsion angles for your query.

Latest revision as of 23:16, 21 May 2019

Written by Chase Webb 20190521

The generation of torsion angle distributions to determine conformational preference about single rotatable bonds is one of the most common uses of the CSD. This tutorial illustrates how Mogul, part of the CSD software can be used to rapidly determine the torsion angle preferences of substituted oxamides by inspecting occurrences of this motif in the CSD.

Source the current environment for CSD-2019

source /nfs/soft/csd/csd-2019/env.csh

Open mogul interface by running the following command:

 /nfs/soft/csd/csd-2019/CSD_2019/bin/mogul

If prompted for the license, it lives here:

/nfs/soft/csd/csd-2019/CSD_2019/csd_licence.dat

You can save a copy in your home directory so that you are not prompted for the location every time you use the CSD.

In the CCDC Mogul 1.8.1 interface, import smiles by clicking load, or draw the motif you are interested in assessing by clicking on the Draw button to bring up a drawing window.

Hit search to submit the query and you should find see a histogram of the reported torsion angles for your query.