FAF-Drugs3 (Free ADME-Tox Filtering Tool) is a program for filtering large compound libraries prior to in silico screening experiments or related modeling studies. The tool can perform computational prediction of some ADME-Tox properties (Adsorption, Distribution, Metabolism, Excretion and Toxicity) in order to assist hit selection before chemical synthesis or ordering. FAF-Drugs3 employs pre-defined filters, but users can also customize their own filtering parameters by using the Filter-Editor service.
If users only need to curate a small compound library (without computing other properties), the Bank-Cleaner service is available. Finally, the Bank-Formatter service can convert SDF or SMILES to a suitable SDF input file.

»»»» Run FAF-Drugs3

Roadmap for FAFDrugs3

    »»»» Short movie tutorial

  • April 2016 - Major revision of SMARTS definitions for a better sensibility/selectivity of toxicophores detection.

  • July 2015 - Upgrade of FAFDrugs2 to FAFDrugs3 web-server - revision of the algorithm for the input data curation steps :

        • Better detection and elimination of large compounds, isotopes and inorganics.
        • Optimization of the desalting step that now uses the SMARTS definitions of 211 known and used salts.
        • Perfecting of the neutralization-standardization/normalization procedure (stereochemistry is now considered during duplicates detection).
        • Essential refinement of the protonation procedure for optimal descriptors calculations (i.e. HBD,HBA, charges...) by using Chemaxon cxcalc method and selecting major microspecie at pH 7.4 (needed for logD calculations).
    Nucleic Acids Res. 2015 Jul 1;43 Lagorce D. et al

  • Sep. 2014 - Major improvements regarding rules and toxicophores detection.

    • New filtering features:
        - User can select two new pre-defined filters (drug-like and lead-like) whose ranges were defined after analysis of the physchem values of oral approved drugs.
        - Optimization of the SMARTS for 154 structural alerts after analysis of major publications about drugs toxicity (see toxicophores section).
        - PPi-HitProfiler (Sperandio O. et al) is now available (only 3D compounds).

    • New rules and charts for individually analyzing each compound:
        - Implementation of Eli-Lilly MedChem Rules toolkit ([53]). This tool help flagging potentially reactive or promiscuous compounds. This package is used by E Lilly for open drug discovery projects.
        - Phospholipidose toxicity model based on structural features ([69]).
        - Pfizer 3/75 [54] and GSK 4/400 [26] physchem rules.
        - Complexity radar chart (Fsp3 [39], Flexibility, system rings, Stereocenters, rotatable bonds, rigid bonds)
        - Radar chart depicting the compound positioning in the applied filter ranges (default is drug-like)

  • June 2011 - Launching of the FAFDrugs2 web-server.

    FAFDrugs2 is available through the Mobyle portal, hosted by the RPBS platform.
    Bioinformatics 2011 Jul 15;27(14):2018-20 Lagorce D. et al

  • 2009 to 2011 - Several improvements dedicated to a web-server version.

    - BankFormatter formats user input file to a proper SDF file required by FAFDrugs2.
    - Filter-Editor allows user to generate his own physchem filter.
    - Improvement of duplicates and mixtures removing.
    - Improvement of LogP calculations by XLOGP3 by using PHYSPROP database experimental LogP values.
    - Embedding of ChemAxon Standardizer in order to normalize compound library before processing.
    - New physchem rules added (complexity, LogSw, oral bioavailability scores...)
    - User friendly html results page with different graphical reports (radar plots, 2D molecule depiction...)
    - Accurate optimization of SMARTS patterns involved in toxicophores detection.
    - Close collaboration with Dr J. Baell for implementation of the PAINS detection (benchmarked on WEHI hits).

  • Sept. 2008 - Release of the FAFDrugs2 standalone version.

    Python command line utility program based on the open source chemistry toolkit OpenBabel, which performs various physicochemical calculations (23 physicochemical rules), identifies key functional groups, some toxic and unstable molecules/functional groups (more than 200).
    BMC Bioinformatics 2008 Sep 24;9:396 Lagorce D. et al

    Get FAFDrugs2 standalone version.

  • Jul. 2006 - Development and deployment of FAFDrugs on the RPBS platform
    FAF-Drugs was an online service based on Frowns (a chemoinformatics toolkit) that allows users to process their own compound collections (SMILES, CANSMILES and SDF files input) via simple ADME/Tox filtering rules such as molecular weight, polar surface area, logP or number of rotatable bonds.
    Nucleic Acids Res. 34(Web Server issue):W738-44. Miteva MA et al.

    Benchmarks are regularly performed on published libraries with referenced values for physchem calculations and toxicophores detections.

MTi thank INSERM, Paris Diderot University, ANR, and INCa for supports.

Related Articles

  • Maréchal et al

    1, 2, 4-Oxadiazoles Identified by Virtual Screening and their Non-covalent Inhibition of the Human 20S Proteasome.

    Curr Med Chem. 2013 in press

  • Chevillard F. et al

    In silico prediction of aqueous solubility: a multimodel protocol based on chemical similarity.

    Mol Pharm. 2012 Nov 5;9(11):3127-35.

  • Villoutreix B.O. et al

    Tyrosine kinase syk non-enzymatic inhibitors and potential anti-allergic drug-like compounds discovered by virtual and in vitro screening.

    PLoS One. 2011;6(6):e21117

  • Pérot S. et al

    Druggable pockets and binding site centric chemical space: a paradigm shift in drug discovery.

    Drug Discov Today. 2010 Aug;15(15-16):656-67.

  • Sperandio O. et al

    Rationalizing the chemical space of protein-protein interaction inhibitors.

    Drug Discov Today. 2010 Mar;15(5-6):220-9


    INSERM UMR-S 973 - Paris Diderot University
    35, rue Hélène BRION
    75205 Paris Cedex 13

    David Lagorce

    Bruno Villoutreix