Anne Hersey ChEMBL Group, EMBL-EBI ChEMBL – A Database of Bioactive Drug-like Small Molecules.
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Transcript of Anne Hersey ChEMBL Group, EMBL-EBI ChEMBL – A Database of Bioactive Drug-like Small Molecules.
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Anne Hersey
ChEMBL Group, EMBL-EBI
ChEMBL – A Database of Bioactive Drug-like Small Molecules
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Outline
• ChEMBL
• Bioactivity Database for Drug Discovery
• UniChem
• Unified Chemical Structure Cross-referencing System
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What is ChEMBL• Open access database for drug discovery
• Freely available (searchable and downloadable)
• Content:
• Bioactivity data manually extracted from the primary medicinal chemistry literature from journals such as J. Med. Chem.
• Subset of data from PubChem
• Deposited data e.g. neglected disease screening, GSK kinase set
• Bioactivity data is associated with a biological target and a chemical structure
• Compounds are stored in a structure searchable format
• Protein targets are linked to protein sequences in UniProt
• Updated regularly with new data
• Secure searching (https://www.ebi.ac.uk/chembldb )
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ChEMBL Content
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Data ExampleCC chemokine receptor-3 (CCR3) antagonists
J.R. Pruitt et al.
Bioorganic & Medicinal Chemistry Letters 17 (2007)
2992–2997
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View of data in ChEMBL
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Compound details
Target detailsActivity details Assay details Reference
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ChEMBL Targets:
Protein Protein complex Protein family Nucleic Acid
e.g., Nicotinic acetylcholine receptor e.g., Muscarinic receptors
Cell Line Tissue Sub-cellular Fraction Organism
e.g., DNA
e.g., Mitochondriae.g., Nervouse.g., HEK293 cells e.g., Drosophila
e.g., PDE5
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Functional:
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Target association
Disease association
Whole organism assays
(e.g., anti-infectives/parasitics)
Disease-derived cell-line
(e.g., human ovarian cancer cell line cytotoxicity)
Tissue or cell-based disease model
(e.g., glucose uptake by adipocytes)
Tissue or cell-based assay for target effect
(e.g., contraction of guinea-pig ileum)
Cell-based assay over-expressing target
(e.g., GPCR calcium mobilisation)
ChEMBL Assays – Binding, Functional, ADMET
Binding:Assays which directly measure the binding of a compound to a particular target
E.g., competition binding assays with a radioligand
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ADMET:• ADME
• Absorption, Distribution, Metabolism, Excretion
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• Toxicity• Hepatotoxicity, nephrotoxicity,
cytotoxicity, cardiotoxicity (hERG, QT prolongation),
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Accessing ChEMBL Data
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Integration with other Public Resources
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Links to other databases:compoundsproteinsgenesdomains
ChEMBL
NTD GPCRSARfari
KinaseSARfari
ADMESARfari
PubChem (subset)Deposited data
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Information on a Target – Target Report Card
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Compound Search – Compound Report Card
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Target Discovery
Lead Discovery
Lead Optimisation
Preclinical Development
Phase 1
Phase 2
Phase 3
Launch
• Target identification
• Microarray profiling
• Target validation
• Assay development
• Biochemistry• Clinical/Animal
disease models
• High-throughputScreening (HTS)
• Fragment-basedscreening
• Focused libraries
• Screening collection
• Medicinal Chemistry
• Structure-baseddrug design
• Selectivity screens
• ADMET screens• Cellular/Animal
disease models• Pharmacokineti
cs
• Toxicology• In vivo safety
pharmacology• Formulation• Dose prediction
PKtolerability Efficacy
Safety&Efficacy
IndicationDiscovery & expansion
Discovery Development Use
Clinical Trials
Compounds from Med. Chem. Projects
Candidates Drugs
Discovery to Development to Market
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Drugs and Clinical CandidatesAlso added and annotated:FDA approved drugs from orange book (~1800)All compounds with USAN/INN names (~10,000)
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16 http://dailymed.nlm.nih.gov
DailyMed Data - Work in Progress
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Probing the Link between Potency, ADMET and Physicochemical Parameters
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Analysis of ChEMBL data shows:• Average dose for oral drugs is not <10mg/day• Average potency for oral drugs is not 1nM• Dose is only weakly correlated with potency• ~50% of drugs bind to >1 target with <1uM potency
34mg/day 30nM
Number of targets with <1uM potency
P Gleeson et al, NRDD (2011),10 p197-208
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UniChem
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Unified Chemical Structure Cross-referencing System
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Multiple EBI Resources hold Compound Structure Data
EU_OPENSCREEN
etc ?
- Maintaining links between DBs is a manual/time consuming for each source.
- Business rules for constructing identifiers not consistent – users confused.
‘CHEMBL221572’
‘10003’
‘RIO’
‘EU-?????’
‘RIBOSTAMYCIN’
??’
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• All EBI DBs share the maintenance overhead of creating links to each other
• All EBI DBs share the benefits of maintained links to external resources
• The UniChem mapping service is freely available to all external users
etcEU_OPENSCREEN
Links to EBI and external sources are shared
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UniChem• Rapid cross-referencing of chemical
structures and their identifiers between databases
• InChi based ‘Unified Chemical Identifier' system
J Chambers et al., J Chem Inf (2013), 5(3)
InChI1S/C9H14N2/c1-8(11(2)3)9-5-4-6-10-7-9/h4-8H,1-3H3/t8-/m0/s1
Connectivity StereochemistryMolecular Formula
InChIKeyMSDVRBYHBSTAOM-QMMMGPOBSA-N
Hydrogens
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UniChem - Sources
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UniChem – InChi or Identifier Searching
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UniChem – InChi or Identifier Searching
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InChi/InChiKey Searching
Identifier Searching
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UniChem – Source Mapping
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UniChem and ChEMBL
• Compound cross references dynamically called from report card page
https://www.ebi.ac.uk/unichem/rest/verbose_inchikey/KTUFNOKKBVMGRW-UHFFFAOYSA-N
KTUFNOKKBVMGRW-UHFFFAOYSA-N
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Useful Information
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ChEMBL Blog:http://chembl.blogspot.com
For ChEMBL news and data releases subscribe to:http://listserver.ebi.ac.uk/mailman/listinfo/chembl-announce
ChEMBL Paper (NAR 2011)
ChEMBL Websitehttps:///www.ebi.ac.uk/chembldb
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Acknowledgements
• John Overington
• Anna Gaulton
• Mark Davies
• Patricia Bento
• Jon Chambers
• Francis Atkinson
• Louisa Bellis
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• Yvonne Light
• George Papadatos
• Shaun McGlinchey
• Nathan Dedman
• Michal Nowotka
• Ruth Akhtar