[gmx-users] ZNO-HSA (Human Serum albumin) Interaction

Smith, Micholas D. smithmd at ornl.gov
Wed Feb 21 16:50:43 CET 2018

Hard to tell from your descriptions. Things to consider:

1) Is the force-field for the ZnO particle realistic (have you validated it or have evidence that it is accurate)
2) If the ZnO particle has a net charge and you are running PME you are going to need to neutralize the system such that it accounts for both the protein and the ZnO nanoparticle
3) Why do you think it is wrong? What experimental evidence can you compare to benchmark if your results are reasonable?

We can't tell you if your results are "right or wrong," that's your responsibility to know this and justify it before submitting to review, but the questions above may help drive your thinking a bit on this.

Hope that helps. 

Micholas Dean Smith, PhD. MRSC
Post-doctoral Research Associate
University of Tennessee/Oak Ridge National Laboratory
Center for Molecular Biophysics

From: gromacs.org_gmx-users-bounces at maillist.sys.kth.se <gromacs.org_gmx-users-bounces at maillist.sys.kth.se> on behalf of Hassan Aaryapour <hassan.gromacs at gmail.com>
Sent: Wednesday, February 21, 2018 3:47 AM
To: gromacs.org_gmx-users; gmx-users at gromacs.org
Subject: [gmx-users] ZNO-HSA (Human Serum albumin) Interaction

Dear Gromacs Users;

I am studying the toxicity effect of ZnO nanoparticle (with a partial
charges of +1.026 and -1.026 for Zinc and Oxygen atoms, respectively) on
the Albumin structure by Gromacs. For MD simulation the nanoparticle was
placed at a distance of 1nm of protein, after running pdb2gmx, the
simulation box was solvated by TIP3P waters. The net charge of protein in
physiological condition is -14 that was neutralized by adding sodium and
chloride ions to box. Then, energy minimization, NVT and NPT were done.
>From the beginning of md simulation, the protein structure began to be
unfolded slowly before binding nanoparticle to it and after binding, the
protein structure changed dramatically. I cannot consider the charge of ZnO
as zero like silver or gold nanoparticles. So, I am confused that whether
the study method is correct or wrong for this interaction? Do the results
seem logical?

Hassan Aryapour
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