On 9/7/17 8:52 AM, Sergio Manzetti wrote:
Hey Justin , you sound like Mark Zuckerberg :)
I don't know whether that's good or bad...
Here is the command I used:
gmx trjconv -f traj -o confout5000.gro -b 10000 -e 10000
-dump 10000 is easier than using -b and -e, FYI.
and it gives the write gro with DNA in the box as it should be.
So then things worked, yes?
This confout.gro is not the same as came out from the GMX run, at the same
moment as the TRJ and XTC came
In what way? Why does this lead you to believe that your restraints
aren't working? The questions I asked before are more diagnostic of
whether or not things are functioning. Dumping a (non-PBC-corrected)
frame and looking at another one (PBC corrected, albeit perhaps not in
the best way) does not say anything about whether or not the algorithms
are working.
-Justin
Sergio Manzetti
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[ http://www.fjordforsk.no/ | Fjordforsk AS ] [ http://www.fjordforsk.no/ | ]
Midtun
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From: "Justin Lemkul" <jalem...@vt.edu>
To: "gmx-users" <gmx-us...@gromacs.org>
Sent: Thursday, September 7, 2017 2:55:05 PM
Subject: Re: [gmx-users] DPOSRES not working
On 9/7/17 8:45 AM, Sergio Manzetti wrote:
It seems that GMX simply didn't write out the correct frame. The confout.gro
file written out is written at the same time as the trajectories, and for some
reason, this confout.gro file has nothing to do with the last output frame from
the sims, when produced by gmx trjconv..
confout.gro is the final frame, re-wrapped for PBC. So it may "look"
different from the final frame of the trajectory, but it's not.
Unless you actually provide answers to the questions I asked and any
actual commands you're issuing (e.g. what did you do when you say
"produced by gmx trjconv" for instance?), then there's nothing anyone
here can do to help you. We can't see what you're seeing or interpret
what's in your mind :)
-Justin
Sergio Manzetti
[ http://www.fjordforsk.no/logo_hr2.jpg ]
[ http://www.fjordforsk.no/ | Fjordforsk AS ] [ http://www.fjordforsk.no/ | ]
Midtun
6894 Vangsnes
Norge
Org.nr. 911 659 654
Tlf: +47 57695621
[ http://www.oekolab.com/ | Økolab ] | [ http://www.nanofact.no/ | Nanofactory
] | [ http://www.aq-lab.no/ | AQ-Lab ] | [ http://www.phap.no/ | FAP ]
From: "Justin Lemkul" <jalem...@vt.edu>
To: "gmx-users" <gmx-us...@gromacs.org>
Sent: Thursday, September 7, 2017 2:28:23 PM
Subject: Re: [gmx-users] DPOSRES not working
On 9/7/17 5:28 AM, Sergio Manzetti wrote:
Hi Johannes, yes, they are there in both cases:
; Include Position restraint file
#ifdef POSRES
#include "posre_DNA_chain_E.itp"
#endif
Do you have a position restraint energy term written in your .log file,
and if so, what is its magnitude? Does your DNA start at the middle of
the box (GROMACS convention) or at the coordinate origin (like other
software)? If you watch the trajectory evolve, what happens? Does the
DNA move a lot or does it just bounce back and forth around its original
position (suggesting your box is simply too small and any time an atom
crosses a boundary, you get a jump)?
-Justin
--
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Justin A. Lemkul, Ph.D.
Assistant Professor
Virginia Tech Department of Biochemistry
303 Engel Hall
340 West Campus Dr.
Blacksburg, VA 24061
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