Prepare receptor and ligand data before docking

Preparation changes the question

The official AutoDock Vina tutorial uses Meeko to prepare receptor and ligand inputs. It also stresses protonation and molecular representation. These steps define the chemical system presented to the docking calculation. A visually recognizable structure is not, by itself, a complete or checked computational input. Preparation deserves its own record in the workflow. [1]

A suggested input review

Keep the original downloaded structure separate from the prepared files. Record the entry identifier, chain selection, ligand identity, preparation tool, and settings. Inspect components such as waters, ions, and cofactors before deciding whether they belong in the calculation. Avoid applying a removal rule without relating it to the research question.

Review the ligand as a chemical object as well as a set of coordinates. Preserve stereochemical information and document the chosen chemical state. If several plausible states are considered, give each a stable identifier and retain the link to the original compound. Save a visual inspection alongside the prepared files so another person can check which structure was actually used.

Keep preparation inspectable

A useful preparation report lists the transformations made and the assumptions that remain. Check that the receptor and ligand can be read by the intended downstream tool before submitting a large batch. Review a small set of inputs and outputs first. This suggested checkpoint helps separate preparation failures from search or scoring behavior. It does not establish that a predicted pose is experimentally correct; that requires an appropriate validation strategy.