[gmx-users] non-specific protein-protein interactions
Mark.Abraham at anu.edu.au
Sat Nov 19 04:07:44 CET 2011
On 19/11/2011 6:42 AM, Ben Reynwar wrote:
> On Fri, Nov 18, 2011 at 7:23 AM, Mark Abraham<Mark.Abraham at anu.edu.au> wrote:
>> On 18/11/2011 8:10 AM, Ben Reynwar wrote:
>>> Dear gromacs list,
>>> Does anyone know how well current force fields capture the energetics
>>> of non-specific protein-protein interactions? I'm simulating a
>>> protein with an arm that alternates between (apparently) non-specific
>>> adsorption to the main-body of the protein and free movement in the
>>> solvent. Can I place any trust in the results of an MD simulation for
>>> something like this? I haven't seen any comparison of experimental
>>> results with simulation results of the energetics of non-specific
>>> protein-protein interactions so I'm a little skeptical about it.
>>> Currently I'm using generalized born implicit solvent, which is
>>> perhaps a mistake when solvation energies could be critical to the
>> I'd be very skeptical unless you can observe many adsorption/desorption
>> processes and with explicit solvent (though they're probably mutually
> I think I asked my question poorly.
> In a perfect simulation with explicit solvent and infinite sampling,
> roughly what kind of error might one expect for peptide-peptide
> interaction energies due to the force field?
> Presumably there are papers out there that go into this, but I'm not
> finding them. If anyone knows of any directions to point me in, I'd
> really appreciate it.
I don't recall having ever seen an explicit solvation simulation on even
a small peptide that claimed exhaustive sampling, never mind a system
that shows such complex behaviour. It's possible someone has used
slow-growth methods to grow a small peptide ligand onto the side of a
protein, and that could give a guide to the accuracy of inter-protein
energetics, but I've never gone looking for such.
More information about the gromacs.org_gmx-users