MDL-800   Click here for help

GtoPdb Ligand ID: 10123

Compound class: Synthetic organic
Comment: MDL-800 is an allosteric activator of SIRT6 that is active in vitro and in physiological experiments (e.g. tumour xenograft models) [1]. It increases the deacetylase activity of SIRT6 which leads to decreased H3K9 and H3K56 acetyl-lysine marks in cancer cells in vitro and an anti-tumour effect.
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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 8
Hydrogen bond donors 2
Rotatable bonds 8
Topological polar surface area 135.4
Molecular weight 623.9
XLogP 5.77
No. Lipinski's rules broken 1
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 COC(=O)c1cc(ccc1S(=O)(=O)Nc1cc(Br)c(cc1C)F)NS(=O)(=O)c1cc(Cl)cc(c1)Cl
Isomeric SMILES COC(=O)c1cc(ccc1S(=O)(=O)Nc1cc(Br)c(cc1C)F)NS(=O)(=O)c1cc(Cl)cc(c1)Cl
InChI InChI=1S/C21H16BrCl2FN2O6S2/c1-11-5-18(25)17(22)10-19(11)27-35(31,32)20-4-3-14(9-16(20)21(28)33-2)26-34(29,30)15-7-12(23)6-13(24)8-15/h3-10,26-27H,1-2H3
InChI Key FKFQBYBODAKGOA-UHFFFAOYSA-N
Bioactivity Comments
In a selectivity screen of 18 HDACs 10 μM MDL-800 potently activated SIRT6 but the compound showed no activity toward SIRT1, SIRT3, SIRT4, and HDAC1-11 even at higher concentrations [1]. Weak activity (>100 μM) was detected towards SIRTs 2, 5, and 7.
Selectivity at enzymes
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
sirtuin 6 Hs Allosteric modulator Binding 5.3 pKd - 1
⤷ pKd 5.3 (Kd 5.4x10-6 M) [1]
Description: Binding of ligand to immobilised SIRT6 protein in a biolayer interferometry (Octet) assay.
sirtuin 6 Hs Allosteric modulator Activation 5.0 pEC50 - 1
⤷ pEC50 5.0 (EC50 1.03x10-5 M) [1]
Description: FLUOR DE LYS® HDAC fluorometric activity assay measuring increased catalytic efficiency of SIRT6 deacetylation.