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In order to calculate the MMPBSA, I am following the tutorial by rashmikumari (https://rashmikumari.github.io/g_mmpbsa/single_protein_ligand_binding_energy.html), but unfortunately, I am getting...
29 October 2020 9,098 3 View
Hi users, I found the topology files for choline with GAFF ff in literature (coa.ff and colinab3lyp08.prepi.txt) and I would like to convert these file to the input files I can use in Gromacs....
21 October 2020 4,460 3 View
Hello, I am trying to perform QM/MM simulations using Gromacs 2016.5, especially to model a transition state for a reaction. I found this tutorial that uses the Linear Transit approach :...
19 October 2020 4,948 3 View
I am facing a problem to make topology file using cgenff as instructed in Lemkul's Gromacs tutorial. But it didn't work as I couldn't get Networkx of version 1.11 . So, I am trying to find an...
19 October 2020 7,925 1 View
Dear All, I have to compute the enthalpy and free energy of a water molecules inside a complex system. I computed entropy using 2PT method but i need energy(potential or total) of the molecule to...
13 October 2020 404 1 View
Can anyone suggest me the proper way to perform MMPBSA using Gromacs ??
12 October 2020 5,409 3 View
Hello, After I minimized the protein structure I used editconf in gromacs to convert the minimized GRO file to PDB. when I visualized the PDB file produced, it was totally corrupted which...
10 October 2020 1,014 4 View
Dear all Is it possible to calculate friction coefficient in Gromacs?
06 October 2020 2,620 2 View
I have studied the structural changes of a protein in 3 different concentrations of ionic liquids (50 mM, 500 mM, and 1M). On analysis of the RDF plots, I find that the magnitude of the RDF plot...
06 October 2020 5,238 2 View
Hey guys, the following command uses the -surf flag and it causes some unnormalized-looking g(r) (see attached png file): gmx_mpi rdf -s tpr.tpr -ref 'resname TST' -sel 'resname RER -f movie.xtc...
04 October 2020 4,200 2 View
Hi every body I want to simulate gas absorption with gromacs. I have a box with three part , amine and water in the middle of box and gas is around of it(gas+amine solution+gas). Firstly I...
03 October 2020 515 2 View
Dear researchers, I ran 250 ns MD simulation of estrogen receptor alpha-tamoxifen complex through Gromacs 2019 package using amber99sb-ildn.ff. Now, I am trying to calculate the binding energy...
03 October 2020 7,639 3 View
Hi. I'm analyzing a bilayer and I want to make an index for calculating tilt angle. my problem is I have no idea about how to create such an index which contains vectors in it. I would be...
02 October 2020 9,210 1 View
I would like to know if there is a tutorial for performing adsorption simulations of a material surface (graphite) and a protein.
01 October 2020 4,680 3 View
While running a simulation on any peptide or protein, is it possible for the secondary structures to change? For example, seeing a steady rise in helical content over the whole simulation?
01 October 2020 4,533 9 View
Dear all, I'm trying to employ replica-exchange with solute tempering 2 (REST2) in a system, but I have performance issues in the calculations. I'm using openmpi-3.0.0 and gromacs 2019.4 patched...
30 September 2020 3,241 1 View
Hi, I have done a protein-protein docking. Now I want to perform MD in gromacs. I am confused with forcefields. When I tried to findout, everywhere it is written for protein-ligand but I couldn't...
30 September 2020 1,810 3 View
Hello Researchers The support for g_mmpbsa is not extended for the latest versions of gromacs (2020). I have already performed 200ns simulations and wish to perform PBSA calculations. What could...
29 September 2020 10,302 2 View
Hi everyone, I need to buy a new laptop. I do the first steps of molecular dynamics by GROMACS (on Ubuntu) with my laptop, but I don't need to do equilibration or final MD run here, I do them on...
29 September 2020 9,748 4 View
I performed in-silico acetylation using PyTM plugin but there are certain clashes that I want to resolve. I couldn't perform energy minimization using gromacs, chimera as they do not have default...
27 September 2020 4,059 6 View
My system consists of ionic liquids, aliphatic and aromatic hydrocarbons. Any suggestions and any script for calculation of viscosity?
25 September 2020 6,761 1 View
I was trying to apply restraints on my molecules, however, they were still moving after I put 100000kJ/mol/nm^2 on them. I am sure my topology is correct, so I think maybe its the correlation of...
24 September 2020 4,283 3 View
I am using Ubuntu 20.04 and I have PyMol installed, with a license. But it has been impossible to add the repository ppa:makson96/dynamics. Even downloaded from github, the package with the...
21 September 2020 7,143 1 View
Hello everybody I use gromacs software but I do not know what code to use to get the number of water molecules in the carbon nanotube. If anyone can help Please Thanks a lot🙏
13 September 2020 1,182 6 View