Re: [ccp4bb] Ligand building in real space

2017-04-10 Thread Paul Emsley

To answer your question...

On 10/04/17 08:44, Mohamed Noor wrote:


Is it possible to directly build a ligand in real space (in Coot?) and then 
generate a SMILES string for restraint generation.


I think that you are describing a 3D editor. It is not possible to do 
this in Coot (Coot's molecular editor is 2D).  If you want to use Coot I 
would do as Johannes says, use File -> Get Monomer.


PG4 (first choice), PGE, PEG, PE8. These are fun to refine in Coot, they 
wriggle around.


I think that SMILES is a bit of side-issue.



I am already using Polder and omit maps that confirm these are not noise.



:-)

Paul.


Re: [ccp4bb] Ligand building in real space

2017-04-10 Thread Johannes Cramer
Hey Mohamed,

I am not sure, if this is what you want, but you can import different PEG
molecules from coot's "File-> Get monomer". A list of different length PEGs
three letter codes can be found on page 1278 of this paper:

Naschberger et al., (2016) http://doi.org/10.1107/S205979831601723X.

I think you must have ccp4 installed, for this to work, but I am not 100%
sure.

Cheers,
Johannes


2017-04-10 9:44 GMT+02:00 Mohamed Noor :

> Dear all
>
> Is it possible to directly build a ligand in real space (in Coot?) and
> then generate a SMILES string for restraint generation. I have some unknown
> blobs in my density where they look like PEG molecules but these do not
> really fit the density (local CC of 0.7).
>
> I am already using Polder and omit maps that confirm these are not noise.
>
> Thanks.
> Mohamed
>


[ccp4bb] Ligand building in real space

2017-04-10 Thread Mohamed Noor
Dear all

Is it possible to directly build a ligand in real space (in Coot?) and then 
generate a SMILES string for restraint generation. I have some unknown blobs in 
my density where they look like PEG molecules but these do not really fit the 
density (local CC of 0.7).

I am already using Polder and omit maps that confirm these are not noise.

Thanks.
Mohamed