[gmx-users] g-dist

mohsen ramezanpour ramezanpour.mohsen at gmail.com
Wed Dec 22 09:50:26 CET 2010


Dear justin
please check this part of my .gro file.
  ...
  630VAL      C 6416   0.554  11.700  -0.442
  630VAL     O1 6417   0.522  11.605  -0.534
  630VAL     O2 6418   0.534  11.834  -0.454
  631<1>  N2       1   2.686   2.399   2.151
  631<1>  C20      2   2.613   2.375   2.230
  631<1>  C14      3   2.519   2.345   2.331
  631<1>  C10      4   2.464   2.452   2.405
  ...
I used the prodrg server and edited my protein.gro file.
Is this correct?
Where is my mistake?
ُthanks in advanvce








On Tue, Dec 21, 2010 at 5:26 PM, Justin A. Lemkul <jalemkul at vt.edu> wrote:

>
>
> mohsen ramezanpour wrote:
>
>> Dear Justin
>>
>> WARNING 1 [file g-dist.mdp, line unknown]:
>>  Can only use nstype=Simple with pbc=no, setting nstype to Simple
>> WARNING 2 [file complex.top, line 39718]:
>>  Bad box in file complex.gro
>>
>> Generated a cubic box   10.816 x   14.959 x    9.086
>> Warning: atom name 6439 in complex.top and complex.gro does not match (C18
>> - H9N)
>> Warning: atom name 6440 in complex.top and complex.gro does not match (C6
>> - H9O)
>> Warning: atom name 6441 in complex.top and complex.gro does not match (C11
>> - H19)
>> Warning: atom name 6442 in complex.top and complex.gro does not match (H11
>> - C18)
>> Warning: atom name 6443 in complex.top and complex.gro does not match (C15
>> - C6)
>> Warning: atom name 6444 in complex.top and complex.gro does not match (H15
>> - C11)
>> Warning: atom name 6445 in complex.top and complex.gro does not match (C17
>> - H11)
>> Warning: atom name 6446 in complex.top and complex.gro does not match (F1
>> - C15)
>> Warning: atom name 6447 in complex.top and complex.gro does not match (C16
>> - H15)
>> Warning: atom name 6448 in complex.top and complex.gro does not match (H16
>> - C17)
>> Warning: atom name 6449 in complex.top and complex.gro does not match (C12
>> - F1)
>> Warning: atom name 6450 in complex.top and complex.gro does not match (H12
>> - C16)
>>
>> WARNING 3 [file complex.top, line 39718]:
>>  12 non-matching atom names
>>  atom names from complex.top will be used
>>  atom names from complex.gro will be ignored
>>
>
> These are very important warnings, and hence why I said one should never
> blindly use -maxwarn unless you fully understand their implications.  The
> order of the contents of the coordinate file must match the order of the
> moleculetypes listed in the [molecules] directive of the topology, and the
> order of the underlying topologies must match.  You've got a bunch of
> mismatches here, indicating that at least one of these criteria is not
> satisfied, so anything you do (be it simulation or analysis) will be
> complete garbage.
>
> Fix your coordinate file and try again.  Don't use -maxwarn.  If grompp
> fails, it's for a reason.
>
> -Justin
>
>
>> besides I generated it as enzyme/drug tutorial.
>> besides C12 is in line 2 from the end of the page.
>> thanks in advance
>>
>>
>>
>>
>>
>> On Tue, Dec 21, 2010 at 5:11 PM, Justin A. Lemkul <jalemkul at vt.edu<mailto:
>> jalemkul at vt.edu>> wrote:
>>
>>
>>
>>    mohsen ramezanpour wrote:
>>
>>        Dear justin
>>        after using grompp without -maxwarn I faced these:
>>
>>        NOTE 2 [file g-dist.mdp, line unknown]:
>>         You are using a plain Coulomb cut-off, which might produce
>>        artifacts.
>>         You might want to consider using PME electrostatics.
>>
>>
>>        This run will generate roughly 2 Mb of data
>>        writing run input file...
>>
>>        There were 2 notes
>>
>>        There were 3 warnings
>>
>>        -------------------------------------------------------
>>        Program grompp, VERSION 4.0.7
>>        Source code file: ../../../../src/gmxlib/gmx_fatal.c, line: 481
>>
>>        Fatal error:
>>        Too many warnings (3), grompp terminated.
>>        If you are sure all warnings are harmless, use the -maxwarn option.
>>
>>
>>    None of this output actually indicates what the errors are.  I don't
>>    know if any of it will be relevant to the problem at hand, but
>>    without seeing what the errors are, there's no way to rule out
>>    incorrect input.
>>
>>
>>        besides it is in 6454 line of complex.gro
>>
>>
>>    How did you generate complex.gro?  If it is line 6454, it is not
>>    numbered accordingly.  That doesn't matter, in theory, but if you've
>>    just simply concatenated the protein and ligand coordinate files and
>>    left any extraneous information in the .gro file, it could be
>>    causing the error.
>>
>>    -Justin
>>
>>
>>
>>
>>
>>
>>        On Tue, Dec 21, 2010 at 4:32 PM, Justin A. Lemkul
>>        <jalemkul at vt.edu <mailto:jalemkul at vt.edu>
>>        <mailto:jalemkul at vt.edu <mailto:jalemkul at vt.edu>>> wrote:
>>
>>
>>
>>           mohsen ramezanpour wrote:
>>
>>               Dear All
>>               I did the Enzyme/drug tutorial and generated complex.gro and
>>               complex.top files as was said.
>>               Now I want to measure the distance between center of mass of
>>               protein and drug
>>               I used g_dist but I could not.
>>               I entered these commands(of course I made an index.ndx and
>>               g-dist.tpr):
>>
>>               I used from an typical .mdp file to generate .tpr file by
>>        below
>>               command:
>>
>>               grompp  -c complex.gro     -p   complex.top   -o
>>         g-dist.tpr                 -f    g-dist.mdp    -maxwarn 3
>>
>>
>>           What warnings are you ignoring?  This is, in general, a very
>>        bad idea.
>>
>>
>>               then,
>>               g_dist     -f    complex.gro    -s   g-dist.tpr    -o
>>         g-dist.xvg
>>
>>               but the result was an empty g-dist.xvg and:
>>
>>               Fatal error:
>>               Unexpected end of file in file   631LIG  C12     45  -0.475
>>                -0.514  -0.434 at line 2
>>               (Source file ../../../../src/gmxlib/confio.
>>               c, line 725)
>>
>>
>>           How many atoms are in complex.gro?  To what line number does
>> this
>>           atom entry correspond?  It seems g_dist thinks the file
>>        should end
>>           here, prematurely.
>>
>>           -Justin
>>
>>
>>               besides,I want to measure this distance befor erunning
>>        and as a
>>               vector.
>>               below is a part of my complex.gro:
>>                631LIG  F1      42  -0.701  -0.571  -0.151
>>                631LIG  C16     43  -0.534  -0.501  -0.306
>>                631LIG  H16     44  -0.491  -0.434  -0.232
>>                631LIG  C12     45  -0.475  -0.514  -0.434
>>                631LIG  H12     46  -0.394  -0.446  -0.459
>>
>>
>>               thanks in advances
>>
>>
>>           --     ========================================
>>
>>           Justin A. Lemkul
>>           Ph.D. Candidate
>>           ICTAS Doctoral Scholar
>>           MILES-IGERT Trainee
>>           Department of Biochemistry
>>           Virginia Tech
>>           Blacksburg, VA
>>           jalemkul[at]vt.edu <http://vt.edu> <http://vt.edu> | (540)
>>
>>        231-9080
>>
>>           http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>>
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>>    --     ========================================
>>
>>    Justin A. Lemkul
>>    Ph.D. Candidate
>>    ICTAS Doctoral Scholar
>>    MILES-IGERT Trainee
>>    Department of Biochemistry
>>    Virginia Tech
>>    Blacksburg, VA
>>    jalemkul[at]vt.edu <http://vt.edu> | (540) 231-9080
>>    http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>>
>>    ========================================
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>>
> --
> ========================================
>
> Justin A. Lemkul
> Ph.D. Candidate
> ICTAS Doctoral Scholar
> MILES-IGERT Trainee
> Department of Biochemistry
> Virginia Tech
> Blacksburg, VA
> jalemkul[at]vt.edu | (540) 231-9080
> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>
> ========================================
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