[gmx-users] Interpretation of g_hbond results

Manik Mayur manik.mayur at gmail.com
Tue Feb 24 21:44:48 CET 2009


On Tue, Feb 24, 2009 at 9:44 PM, Justin A. Lemkul <jalemkul at vt.edu> wrote:

>
> Hi,
>
> I have a quick question about interpreting the output from g_hbond.  I am
> using the -ac option to calculate H-bond lifetimes between my protein and a
> series of different, bound ligands.  I read the associated paper, but I
> would like to confirm the interpretation of the results before I continue
> much further.  I obtained the following:
>

Which paper are you talking about? Is there a paper for each gromacs
postprocessing tool?

--------------------------------------------------
> Type      Rate (1/ps) Time (ps)  DG (kJ/mol)  Chi^2
> Forward         0.003    309.475      19.590  0.000294756
> Backward        0.007    136.034      17.471
> One-way         0.002    471.990      20.678
> Integral        0.001   1534.894      23.717
> Relaxation      0.002    606.619      21.325
>
> The "forward" and "backward" rates and times make sense based on equations
> 3 & 4 in the paper, but I could not find an explanation of what "one-way"
> and "relaxation" are.  Is the "integral" value taken from equation 2, and
> thus should be interpreted as the overall H-bond lifetime?
>
> Thanks,
> Justin
>
> --
> ========================================
>
> Justin A. Lemkul
> Graduate Research Assistant
> 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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-- 
Graduate student
Microfluidics Lab
Dept. of Mechanical Engg.
IIT Kharagpur
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