Automatic Ligand parameterization tutorial using BioExcel Building Blocks (biobb)
This tutorial aims to illustrate the process of ligand parameterization for a small molecule, step by step, using the BioExcel Building Blocks library (biobb). The particular example used is the Sulfasalazine protein (3-letter code SAS), used to treat rheumatoid arthritis, ulcerative colitis, and Crohn's disease.
OpenBabel and ACPype packages are used to add hydrogens, energetically minimize the structure, and generate parameters for the GROMACS package. With Generalized Amber Force Field (GAFF) forcefield and AM1-BCC charges.
Copyright & Licensing
This software has been developed in the MMB group at the BSC & IRB for the European BioExcel, funded by the European Commission (EU H2020 823830, EU H2020 675728).
- (c) 2015-2025 Barcelona Supercomputing Center
- (c) 2015-2025 Institute for Research in Biomedicine
Licensed under the Apache License 2.0, see the file LICENSE for details.

Version History
Version 3 (latest) Created 24th Mar 2026 at 12:39 by Genís Bayarri
Update to BioBB 5.2.*
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Version-3
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Version 2 Created 6th Aug 2025 at 09:12 by Genís Bayarri
Update to BioBB 5.1.*
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Version-2
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Version 1 (earliest) Created 22nd Apr 2024 at 11:54 by Genís Bayarri
Initial commit
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Created: 22nd Apr 2024 at 11:54
Last updated: 24th Mar 2026 at 12:39
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https://orcid.org/0000-0003-0513-0288