Re: [PyMOL] RMS over a MD trajectory.

2015-05-11 Thread Albert Solernou
Oh, I see... It looks like I'll need to end up writing a short script that does the loop along the trajectory together with a correct RMS calculation. Thanks for the tip, Carsten. Cheers, Albert On 05/08/2015 04:11 PM, Schubert, Carsten [JRDUS] wrote: > Hi Al, > > based on my experience runnin

[PyMOL] how to connect to atoms?

2015-05-11 Thread leila karami
Dear pymol users I have one pdb file containing two peptides. Based on experimental data, I should connect two peptides to obtain one new peptide in pdb file. This connection is as follows: CD atom of GLU residue from peptide 1 and NZ atom of LYS residue from peptide 2. How to make this connecti

Re: [PyMOL] how to connect to atoms?

2015-05-11 Thread Tsjerk Wassenaar
Hi Leila, Are the peptides already positioned correctly? Then there's nothing you can do with Pymol to help out with Gromacs. With Gromacs, you'll have to make a special bond to account for the link between the peptides, and you have to merge the two peptides during the processing with pdb2gmx. Ch

Re: [PyMOL] how to connect to atoms?

2015-05-11 Thread Tsjerk Wassenaar
Hi Leila, This too is more a question for the Gromacs mailing list. Gromacs does not read bond information (CONECT records) from a PDB file. It only reads the ATOM/HETATM records and sets bonds based on the force field building block definitions and the special bonds (such as the isopeptide link)

[PyMOL] How to Highlight B-Values of Side Chains?

2015-05-11 Thread Angelo Rossi
Hello: I am trying to see the effect of side-chain fluctuation on molecular permeation through a transmembrane protein channel. The idea is create a pdb file with a column of B-values related to the RMSF values of the MD trajectory. What I tried was to set the B-values of all heavy atom main-ch

Re: [PyMOL] How to Highlight B-Values of Side Chains?

2015-05-11 Thread Osvaldo Martin
Hi Angelo, As far as I understand the putty representation takes the values from the b-factor of the Ca atom. Probably you should store your fluctuation values either on the Ca (leaving all the others atoms with 0.0 or any other value) or just set the same b-factor for all the atoms of a given res