[gmx-users] Problems with large molecule simulation

[Justin Lemkul]

On 5/16/17 1:27 PM, Ben Tam wrote:
>
> Dear gromacs user,
>
> I am trying to simulate a large system, but I ran into some fundamental problems. For example in the .gro file, the name of the atoms merge with the number count:
>
>     2MOL     C2 9998   3.987   2.259   6.276
>     2MOL     C5 9999   3.987   2.061   6.079
>     2MOL     C110000   3.987   1.025   7.721
>     2MOL     C210001   3.987   0.920   7.615
>
> Sorry for this basic question, but how do people solve that problem? As I know there is a specific format for .gro file?
>

Yes, it is fixed-format.

http://manual.gromacs.org/documentation/2016.3/user-guide/file-formats.html#gro

What exactly is the nature of the problem?  Most common systems are >10k atoms 
and all GROMACS tools should handle things just fine.

-Justin

-- 
==================================================

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

jalemkul at outerbanks.umaryland.edu | (410) 706-7441
http://mackerell.umaryland.edu/~jalemkul

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