You are right, thank you!
Cheers,
Enrico

чт, 27 янв. 2022 г. в 13:32, Ali Saad Kusay <akus8...@uni.sydney.edu.au>:
>
> Hi Enrico,
>
> I think it's because you are selecting side chains, glycine has no sidechain 
> and alanine has single carbon atom side chain so this representation won't 
> work for it. You would need to remove the sidechains from the selection to 
> make it apply to the backbone atoms, i.e. cmd.select('rep lines and poly)
>
> Cheers,
>
> Ali
>
> On 27/1/22, 11:22 pm, "Enrico Martinez" <jmsstarli...@gmail.com> wrote:
>
>     additional question in the same field:
>     as I've mentioned before, before applying distance-based filtering, I
>     would like to change the representation of the lines to ball-and-stick
>     for the residues involved in the interactions:
>     cmd.select('rep lines and sidechain')
>     cmd.show_as('sticks', 'sele')
>     cmd.set('stick_radius', '0.10')
>     cmd.set('stick_ball', 'on')
>     cmd.set('stick_ball_ratio', '2.2')
>
>     I've just noticed that some residues remain their "line"
>     representation, notably for hydrophobic (Gly, Ala) residues. How could
>     it be fixed ?
>
>     чт, 27 янв. 2022 г. в 12:38, Enrico Martinez <jmsstarli...@gmail.com>:
>     >
>     > Thank you very much, Ali!!
>     > Cheers,
>     > Enrico
>     >
>     > чт, 27 янв. 2022 г. в 12:20, Ali Saad Kusay 
> <akus8...@uni.sydney.edu.au>:
>     > >
>     > > Hi Enrico,
>     > >
>     > > You need to use the byres or br. Selection 
> (https://protect-au.mimecast.com/s/4MzUCROND2uvY6pqpi9A9Zw?domain=pymolwiki.org)
>     > >
>     > > I.e:
>     > > cmd.select('br. (rep sticks & visible beyond 4 of not polymer)')
>     > >
>     > > Also, consider hiding all protein residues and showing only the ones 
> near the protein, i.e.:
>     > > cmd.show('sticks','br. poly within 4 of resn XXX')
>     > > ^ Where 4 is the distance and XXX should be substituted with the 
> residue name of the ligand
>     > >
>     > > Cheers,
>     > >
>     > > Ali
>     > >
>     > > On 27/1/22, 10:12 pm, "Enrico Martinez" <jmsstarli...@gmail.com> 
> wrote:
>     > >
>     > >     Dear Pymol Users!
>     > >     I am working on the visualization of the protein-ligand contacts
>     > >     identified using
>     > >     preset.ligand_cartoon('pdb',_self=cmd)
>     > >     Since the command also displays some residues, which are not 
> involved
>     > >     in the interactions (with the radicals located too far away) with 
> the
>     > >     ligand, I need to filter the displayed side-chains focusing only 
> on
>     > >     the important interactions. I am using a distance-based criterion 
> for
>     > >     the selection of the residues which I am going to hide.
>     > >
>     > >     this is what I've already tried:
>     > >
>     > >     # display visible side chains as the sticks
>     > >     cmd.select('rep lines and visible and sidechain')
>     > >     cmd.show('sticks', 'sele')
>     > >     # select all visible sticks of the sidechains far away from the 
> ligand
>     > >     cmd.select('sidechain & (rep sticks & visible beyond 4 of not 
> polymer)')
>     > >     cmd.hide('everything', 'sele')
>     > >
>     > >     the problem is that the "select" command with such syntax, always
>     > >     selects the ATOMS, but not the whole side-chains. Is it possible 
> to
>     > >     hide the whole side-chain using such syntax as well as it's 
> displayed
>     > >     label?
>     > >     Many thanks in advance!
>     > >     Enrico
>     > >
>     > >
>     > >     _______________________________________________
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>     > >
>
>


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