Re: [gmx-users] Reg: Zinc ion gets displaced during Protein-Zn-Ligand simulation

2019-10-10 Thread Amit Jaiswal
Dear Jorden, Thanks for reply. I followed your suggestions and i got an error as follows: Command line:  gmx grompp -f nvt.mdp -c em.gro -r em.gro -p topol.top -n index.ndx -o nvt.tpr Ignoring obsolete mdp entry 'title'Setting the LD random seed to 1403244422Generated 100032 of the 100128

[gmx-users] Help with a failing test - gromacs 2019.4 - Test 42

2019-10-10 Thread Raymond Arter
Hi, When performing a "make check" on Gromacs 2019.4, I'm getting test 42 failing. It gives the error: Mdrun cannot use the requested (or automatic) number of ranks, retrying with 8 And the mdrun.out and md.log of swap_x reports: The number of ranks you selected (14) contains a

[gmx-users] Help with pull code for umbrella pulling

2019-10-10 Thread Slabbert, B, Mr [bslabb...@sun.ac.za]
Hi, I am currently trying to perform an umbrella simulation on a nucleosome structure. I am trying to pull the C-terminal tail away from the rest of the structure. I am at the pulling stage and run: gmx grompp -f md_pull.mdp -c npt.gro -p topol.top -n index.ndx -t npt.cpt -r npt.gro -o

Re: [gmx-users] Error running gromacs tutorial

2019-10-10 Thread antonia vyrkou
Does the minimization end normally or it crashes? On Thu, Oct 10, 2019 at 9:27 AM Suprim Tha wrote: > I was trying Gromacs based upon the tutorial on > http://www.mdtutorials.com/gmx/lysozyme/05_EM.html > However, when I run the command gmx mdrun -v -deffnm em, only em.log, > em.edr and em.tpr

[gmx-users] Error running gromacs tutorial

2019-10-10 Thread Suprim Tha
I was trying Gromacs based upon the tutorial on http://www.mdtutorials.com/gmx/lysozyme/05_EM.html However, when I run the command gmx mdrun -v -deffnm em, only em.log, em.edr and em.tpr are formed but not em. trr and em.gro Without the energy minimized .gro file, I cannot continue further. Please

Re: [gmx-users] Reg: Zinc ion gets displaced during Protein-Zn-Ligand simulation

2019-10-10 Thread Jorden Cabal
Hi Amit, The metal ion needs to be treated very very carefully so as to maintain their co-ordination state with the nearby atoms of protein. To do this, one needs to generate the parameter separately for the complex formed by the metal ion with the protein residues because due to presence of metal

Re: [gmx-users] how to calculate average structure

2019-10-10 Thread Subhomoi Borkotoky
Hi You can check the log file of the cluster output. An average time step will be given representating the clusters in a tabular format. Note down the time, accordingly dump it from the trajectory with trjconv. Use an index file for the protein+ ligand. Hope it helps. On Mon, Oct 7, 2019,