The increasing use of information
technology in the discovery of
new molecular entities encourages the use of modern molecular-modeling
tools to help teach important concepts of drug design to chemistry
and pharmacy undergraduate students. In particular, statistical models
such as quantitative structure–activity relationships (QSAR)—often
as its 3D QSAR variant—are commonly used in the development
and optimization of a leading compound. We describe how these drug
discovery methods can be taught and learned by means of free and open-source
web applications, specifically the online platform
. This new suite
of web applications has been integrated into a drug design teaching
course, one that provides both theoretical and practical perspectives.
We include the teaching protocol by which pharmaceutical biotechnology
master students at Pharmacy Faculty of Sapienza Rome University are
introduced to drug design. Starting with a choice among recent articles
describing the potencies of a series of molecules tested against a
biological target, each student is expected to build a 3D QSAR ligand-based
model from their chosen publication, proceeding as follows: creating
the initial data set (Py-MolEdit); generating the global minimum conformations
(Py-ConfSearch); proposing a promising mutual alignment (Py-Align);
and finally, building, and optimizing a robust 3D QSAR models (Py-CoMFA).
These student activities also help validate these new molecular modeling
tools, especially for their usability by inexperienced hands. To more
fully demonstrate the effectiveness of this protocol and its tools,
we include the work performed by four of these students (four of the
coauthors), detailing the satisfactory 3D QSAR models they obtained.
Such scientifically complete experiences by undergraduates, made possible
by the efficiency of the 3D QSAR methodology, provide exposure to
computational tools in the same spirit as traditional laboratory exercises.
With the obsolescence of the classic Comparative Molecular Field Analysis
Sybyl host, the 3dqsar web portal offers one of the few available
means of performing this well-established 3D QSAR method.