On 1/13/17 6:43 AM, Nivedita Rai wrote:
Dear Gromacs User,

                    I am running *protein ligand complex* simulation by
following the Beven lab tutorial. while production run im getting two notes
such as:

*NOTE 1* [file topol.top]:
  The largest charge group contains 11 atoms.
  Since atoms only see each other when the centers of geometry of the charge
  groups they belong to are within the cut-off distance, too large charge
  groups can lead to serious cut-off artifacts.
  For efficiency and accuracy, charge group should consist of a few atoms.
  For all-atom force fields use: CH3, CH2, CH, NH2, NH, OH, CO2, CO, etc.

Number of degrees of freedom in T-Coupling group Protein_UNK is 8298.87
Number of degrees of freedom in T-Coupling group Water_and_ions is 180606.12
Largest charge group radii for Van der Waals: 0.267, 0.265 nm
Largest charge group radii for Coulomb:       0.267, 0.265 nm
Calculating fourier grid dimensions for X Y Z
Using a fourier grid of 84x84x84, spacing 0.118 0.118 0.118
Estimate for the relative computational load of the PME mesh part: 0.32

NOTE 2 [file md.mdp]:
  This run will generate roughly 5681 Mb of data

Is *note1* will create any trouble? if yes then how to rectify it?

I have already posted this question twice. hope this time I will get the

I've replied twice, starting with: https://mailman-1.sys.kth.se/pipermail/gromacs.org_gmx-users/2017-January/110245.html



Justin A. Lemkul, Ph.D.
Ruth L. Kirschstein NRSA Postdoctoral Fellow

Department of Pharmaceutical Sciences
School of Pharmacy
Health Sciences Facility II, Room 629
University of Maryland, Baltimore
20 Penn St.
Baltimore, MD 21201

jalem...@outerbanks.umaryland.edu | (410) 706-7441

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