H-151   Click here for help

GtoPdb Ligand ID: 10122

Synonyms: H 151 | H151
Immunopharmacology Ligand
Compound class: Synthetic organic
Comment: H-151 is a small molecule covalent STING antagonist [2]. Mechanistically it binds to Cys91 of the protein and prevents its palmitoylation. The non-modified STING protein is then unable to assemble the STING complexes that are essential to activate downstream processes (e.g. Type I interferon response). H-151 has been reported to reduce SARS-CoV-2-induced lung inflammation and to improve disease outcome in ACE2-humanised mice [1].

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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 3
Hydrogen bond donors 3
Rotatable bonds 5
Topological polar surface area 56.92
Molecular weight 279.14
XLogP 3.86
No. Lipinski's rules broken 0
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 CCc1ccc(cc1)NC(=O)Nc1c[nH]c2c1cccc2
Isomeric SMILES CCc1ccc(cc1)NC(=O)Nc1c[nH]c2c1cccc2
InChI InChI=1S/C17H17N3O/c1-2-12-7-9-13(10-8-12)19-17(21)20-16-11-18-15-6-4-3-5-14(15)16/h3-11,18H,2H2,1H3,(H2,19,20,21)
InChI Key UJZDIKVQFMCLBE-UHFFFAOYSA-N
Bioactivity Comments
H-151 inhibits IFNβ luciferase reporter activation in HEK293 cells expressing human STING [2]. The authors (Haag et al., 2018) show direct interaction of H-151 and STING, and STING functional inhibition by H-151 using various methodologies but no inhibitory constant value is provided in the article. From Figure 5b it looks as though half-maximal inhibition in the IFNβ reporter assay occurs in the 50-100 nM range.
Selectivity at other protein targets
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
stimulator of interferon response cGAMP interactor 1 Hs Antagonist Inhibition - - - 2
⤷ [2]