Re: [gmx-users] DSSP regardin

2019-03-16 Thread Mateusz Bieniek
Hi Rahul, I've run into a similar issue a year ago. It is possible to configure gmx with the extra configuration file (as described in the documentation) to get this right. However, I found it to be archaic and wrote my own quick DSSP visualiser in matplotlib. I am planning to improve the code

Re: [gmx-users] CU2+ nonbonded parameteres (sigma and epsilon)

2019-03-16 Thread Justin Lemkul
On 3/16/19 9:06 AM, Mohsen Asadbegi wrote: Thanks for your answer, I want to simulate interaction of amyloid-beta peptide and CU(II) ion in non-bonded modes. Non-bonded parameters of some metal ions like ZN(II), CAD(II), and CA(II) are provided in CHARMM36. So what is the difference among

Re: [gmx-users] CU2+ nonbonded parameteres (sigma and epsilon)

2019-03-16 Thread Mohsen Asadbegi
Thanks for your answer, I want to simulate interaction of amyloid-beta peptide and CU(II) ion in non-bonded modes. Non-bonded parameters of some metal ions like ZN(II), CAD(II), and CA(II) are provided in CHARMM36. So what is the difference among copper ion and zinc/cadmium and calcium ions?

Re: [gmx-users] CU2+ nonbonded parameteres (sigma and epsilon)

2019-03-16 Thread Paul Bauer
Hello, Classical force fields are a bad way to describe the behaviour of transition metals such as CU2+, because they are not able to cover the behaviour of the D-orbitals with just the sigma and epsilon parameters. What are you planning to use the model for? It is possible to parametrize

[gmx-users] Replica exchange MD analysis

2019-03-16 Thread Rituraj Purohit
Dear Friends, I performed REMD by following tutorial provided by Mark Abraham, But I am not able to get the analysis part. Is a step-wise tutorial available ? I would be thankful to you if anyone of you could help me to perform analysis of REMD output. Thanking you Regards RajP -- Gromacs Users

[gmx-users] (no subject)

2019-03-16 Thread shakira shukoor
Dear all I encountered with following error when running the umbrella sampling simulation of a protein. What modification should I make in the pull code to get rid of the error. ERROR 1 [file npt_umbrella.mdp]: When the maximum distance from a pull group reference atom to other atoms in the