SIAIS178   Click here for help

GtoPdb Ligand ID: 10526

Synonyms: compound 19 [PMID: 31539241] | SIAIS-178
Immunopharmacology Ligand
Compound class: Synthetic organic
Comment: SIAIS178 is a novel proteolysis-targeting chimeric (PROTAC) degrader [1]. It is a hybrid molecule that connects the BCR-ABL kinase inhibitor dasatinib to a ligand for Von Hippel-Lindau (VHL) E3 ubiquitin ligase via an optimised linker. SIAIS178 targets BCR-ABL protein for VHL-mediated degradation. The hybrid molecule exhibits an improved kinase selectivity profile compared to dasatinib (in a KINOME Scan evaluation). An epimer of SIAIS178 with a reversed (S) configuration at the proline 4-position of the VHL ligand does not bind to the VHL ligase and is inactive with respect to BCR-ABL degradation.
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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 CDK toolkit. 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 17
Hydrogen bond donors 5
Rotatable bonds 24
Topological polar surface area 271.46
Molecular weight 1011.4
XLogP 5.55
No. Lipinski's rules broken 3
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.

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Canonical SMILES OC1CC(N(C1)C(=O)C(C(C)(C)C)NC(=O)CCCCCCC(=O)N1CCN(CC1)c1nc(C)nc(c1)Nc1ncc(s1)C(=O)Nc1c(C)cccc1Cl)C(=O)NCc1ccc(cc1)c1scnc1C
Isomeric SMILES O[C@@H]1C[C@H](N(C1)C(=O)[C@H](C(C)(C)C)NC(=O)CCCCCCC(=O)N1CCN(CC1)c1nc(C)nc(c1)Nc1ncc(s1)C(=O)Nc1c(C)cccc1Cl)C(=O)NCc1ccc(cc1)c1scnc1C
InChI InChI=1S/C50H62ClN11O6S2/c1-30-12-11-13-36(51)43(30)59-47(67)38-27-53-49(70-38)57-39-25-40(56-32(3)55-39)60-20-22-61(23-21-60)42(65)15-10-8-7-9-14-41(64)58-45(50(4,5)6)48(68)62-28-35(63)24-37(62)46(66)52-26-33-16-18-34(19-17-33)44-31(2)54-29-69-44/h11-13,16-19,25,27,29,35,37,45,63H,7-10,14-15,20-24,26,28H2,1-6H3,(H,52,66)(H,58,64)(H,59,67)(H,53,55,56,57)/t35-,37+,45-/m1/s1
InChI Key YGQREOJIRFCRKQ-ZIBKGDFVSA-N
Bioactivity Comments
SIAIS178 promotes the degradation of BCR-ABL protein in BCR-ABL-driven leukemic cells in vitro, and induces regression of K562 CML cell xenograft tumours in vivo [1]. Its antiproliferative activity is no better than that of dasatinib alone.
Selectivity at enzymes
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
ABL proto-oncogene 1, non-receptor tyrosine kinase Hs Inhibitor Inhibition 9.5 pKd - 1
⤷ pKd 9.5 (Kd 3.5x10-10 M) [1]
Description: Binding affinity for the unphosphorylated kinase domain of the human ABL protein.