GROMACS version:2020
I have done 100 ns simulation for my Protein using Gromacs 2020… Now i want to choose best stable conformation . How can i find the lowest energy conformation from my trajectory?
actually i need a pdb file of lowest energy conformation for computing cavities, tunnels,…in MOL2 package.
To extrand a pdb file from a xtc file you can use gmx trjconv, select a time (-dump) and then ask to save as pdb -o name.pdb
Concerning the conformation selection, if you are interest at the lowest free energy conformation (then you have to look at the most populated conformation), assuming that your simulation is converged. Or?
Hi dear alevilla,
I am a new user and dont know how can i find the lowest energy conformation from my trajectory…
lf you have the command lines, can you send me them?
There is no guarantee of this, and MD simulations are not driven by free energy, which is what is truly necessary to say one has the most “stable” conformation. The total potential energy in the MD simulation is not something that force fields are generally parametrized to ascribe any meaningful value, so there is no way to know if you are in a global energy minimum at any point during the trajectory.