BU72   Click here for help

GtoPdb Ligand ID: 9363

Synonyms: compound 10 (Husbands and Lewis, 1995) [4]
PDB Ligand
Compound class: Synthetic organic
Comment: BU72 was reported as a long-lasting μ receptor agonist [5]. Its very high affinity meant that it was not considered as a clinical candidate. Strong lipophilic binding interactions with the μ receptor confer slow receptor kinetics, and therefore long duration of action.
We revised the chemical structure in March 2021, based on data arising from analysis of the crystal structure of the BU72/μ receptor complex that was deposited to the Protein Data Bank (5C1M) [2-3]. This shows that the (β-phenyl) group of BU72 shoud be in the (R) configuration. BU72 has been used in a number of studies to model the μ receptor activation process [1,6].
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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View interactive charts of activity data across species
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 3
Hydrogen bond donors 2
Rotatable bonds 2
Topological polar surface area 44.73
Molecular weight 428.25
XLogP 3.03
No. Lipinski's rules broken 0

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES CO[C@@]12C=C[C@@]34[C@@]5([C@@H]1N[C@@H]([C@]2(C)C3)c1ccccc1)CCN([C@@H]4Cc1c5cc(O)cc1)C
Isomeric SMILES CO[C@@]12C=C[C@@]34[C@@]5([C@@H]1N[C@@H]([C@]2(C)C3)c1ccccc1)CCN([C@@H]4Cc1c5cc(O)cc1)C
InChI InChI=1S/C28H32N2O2/c1-25-17-26-11-12-28(25,32-3)24(29-23(25)18-7-5-4-6-8-18)27(26)13-14-30(2)22(26)15-19-9-10-20(31)16-21(19)27/h4-12,16,22-24,29,31H,13-15,17H2,1-3H3/t22-,23-,24+,25+,26-,27+,28+/m1/s1
InChI Key RGJHUVJQGAAZLK-GKTFKBBASA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
References
1. Cheng JX, Cheng T, Li WH, Liu GX, Zhu WL, Tang Y. (2018)
Computational insights into the G-protein-biased activation and inactivation mechanisms of the μ opioid receptor.
Acta Pharmacol Sin, 39 (1): 154-164. [PMID:29188799]
2. Huang W, Manglik A, Venkatakrishnan AJ, Laeremans T, Feinberg EN, Sanborn AL, Kato HE, Livingston KE, Thorsen TS, Kling RC et al.. (2015)
Structural insights into µ-opioid receptor activation.
Nature, 524 (7565): 315-21. [PMID:26245379]
3. Huang W, Manglik A, Venkatakrishnan AJ, Laeremans T, Feinberg EN, Sanborn AL, Kato HE, Livingston KE, Thorsen TS, Kling RC et al.. (2020)
Author Correction: Structural insights into μ-opioid receptor activation.
Nature, 584 (7820): E16. [PMID:32724208]
4. Husbands SM, Lewis JW. (1995)
Morphinan cyclic imines and pyrrolidines containing a constrained phenyl group: high affinity opioid agonists.
Bioorg Med Chem Lett, 5: 2969–2974.
5. Neilan CL, Husbands SM, Breeden S, Ko MC, Aceto MD, Lewis JW, Woods JH, Traynor JR. (2004)
Characterization of the complex morphinan derivative BU72 as a high efficacy, long-lasting mu-opioid receptor agonist.
Eur J Pharmacol, 499: 107-16. [PMID:15363957]
6. Sena Jr DM, Cong X, Giorgetti A. (2021)
Ligand based conformational space studies of the μ-opioid receptor.
Biochim Biophys Acta Gen Subj, 1865 (3): 129838. [PMID:33373630]