MD Simulations and Force Field development

Download Chitosan Force Field GROMOS 56ACARBO_CHT for GROMACS molecular dynamic simulations

GROMOS 56ACARBO_CHT — new GROMACS force field for simulations chitin, chitosan and its N-substituted derivatives.

[download from Google Drive] [download from our site]

Citation: Naumov, V.S. & Ignatov, S.K. Modification of 56ACARBO force field for molecular dynamic calculations of chitosan and its derivatives  // J Mol Model (2017) 23: 244.

To create chitosan topology using pdb2gmx and GROMOS 56ACARBO_CHT:

1. Download and setup force field 56ACARBO_CHT

2. Create gro-file with necessary structure of chitosan (example). Chitosan should consist of residues: CHT, CHT0, CHTN, CHTP, CHTR and ACE2 (for details please see our article, also attached). Gro file also could include any other molecules. The only restriction is compatibility with 56ACARBO_CHT force filed (the correct names for residues and atoms).

3. Run pdb2gmx with created gro-file and get wich contains topology, excepted some special interactions for chitosan molecules.

4. Run python-script with and get Script adds interactions that pdb2gmx does not support. So, contains full topology.

Download PolyLactide Force Field OPLS PLAFF3 for GROMACS molecular dynamic simulations

OPLSAA_PLAFF3 — GROMACS force field for PolyLactide simulations, files were prepared according to McAliley 2011 (

[download from Google Drive] [download from our site]

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