SZUH280   Click here for help

GtoPdb Ligand ID: 12356

Synonyms: compound 16e [PMID: 36516047] | SZUH-280
Compound class: Synthetic organic
Comment: SZUH280 is a PROTAC type degrader of the epigenetic regulator histone deacetylase 8 (HDAC8) protein [5]. Structurally it is a chimeric molecule containing the HDAC8 inhibitor PCI-34051 [1], linked to the cereblon (CRBN)-binding ligand pomalidomide to direct the HDAC8 protein for ubiquitination and proteasomal degradation. HDAC8 is an oncology drug target whose expression is upregulated in a range of aggressive cancers. Selective inhibtion of HDAC8 [4], or downregulation through protein degradation [2-3,6] is being widely investigated for anti-tumour potential. SZUH280 is an HDAC8 degrading tool that promotes solid tumour regression in vivo.
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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

SZUH280 is commercially available from our sponsors

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 11
Hydrogen bond donors 4
Rotatable bonds 15
Topological polar surface area 199.01
Molecular weight 706.25
XLogP 2.23
No. Lipinski's rules broken 2

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 ONC(=O)c1ccc2c(c1)n(cc2)Cc1ccc(cc1)OCCOCCn1nnc(c1)CNc1cccc2c1C(=O)N(C2=O)C1CCC(=O)NC1=O
Isomeric SMILES O=C(NO)c1ccc2c(n(Cc3ccc(OCCOCCn4cc(CNc5cccc6C(=O)N(C7C(=O)NC(=O)CC7)C(=O)c56)nn4)cc3)cc2)c1
InChI InChI=1S/C36H34N8O8/c45-31-11-10-29(34(47)38-31)44-35(48)27-2-1-3-28(32(27)36(44)49)37-19-25-21-43(41-39-25)14-15-51-16-17-52-26-8-4-22(5-9-26)20-42-13-12-23-6-7-24(18-30(23)42)33(46)40-50/h1-9,12-13,18,21,29,37,50H,10-11,14-17,19-20H2,(H,40,46)(H,38,45,47)
InChI Key OCXICBCMNKOWFI-UHFFFAOYSA-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/)
Bioactivity Comments
SZUH280 selectively degrades HDAC8 protein, and has little effect on levels of other HDAC proteins in cancer cell lines [5]. The HDAC8 interacting moiety of SZUH280, PCI-34051, potently inhibits recombinant HDAC8 (Ki 10 nM) and it is >200-fold selective for HDAC8 compared to HDACs 1, 2, 3, 6 and 10 [1]. There is not data to indicate if incorporation of PCI-34051 into SZUH280 alters its inhibitory potency.
Selectivity at enzymes
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
histone deacetylase 8 Hs Inhibitor Inhibition ~8.0 pKi - 1
⤷ pKi ~8.0 (Ki ~1x10-8 M) [1]
Description: Inhibition constant for the parent HDAC8 inhibitor PCI-34051