To get access to ChemAxon properties, subscribe to ChemAxon Properties Access. Note that the Access package option is free for academic users.
You can find more information about ChemAxon Calculator Plugins here
With the ChemAxon property filter, molecules can be filtered out based on their properties, such as Mass, logP, etc.
Physicochemical properties critically affect pharmacokinetic and pharmacodynamic properties of ligands. For example, high logP (> 5) and molecular weight (> 500 g/mol) are typically associated with unsuitable ADMET profile. Presence of adequately charged functional groups in the ligand can be critical for high-affinity binding. Careful selection of physicochemical properties is therefore crucial for the identification of hits suitable for further drug development.
It is recommended to use property filtering in each screening workflow to narrow down the search space for the most relevant molecules. For general small-molecule drug discovery projects where the goal is to develop an orally active agent, the number of rule-of-five (RO5) violations should be kept at minimum.
It is recommended to adjust the ChemAxon property filter to the actual project. For example boundaries might be defined based on the properties of known reference ligands acting on the target. If all reference ligands contain an H-bond donor functionality, it might make sense to set a minimum 1 H-bond donor limit. Fragment-based drug discovery projects require more strict limits in terms of molecular size and lipophilicity. It is therefore recommended to use rule-of-three (RO3) violation filter for such projects.
ChemAxon properties for the mcule database precalculated with default parameters can be accessed by subscribing to the ChemAxon Property package (Access package option).