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Building Block Catalogue

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2 000 new building blocks are synthesized monthly. Here is an important update to our MedChem Highlights from July 2020

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    Enamine to be the exclusive supplier of Astex’ MiniFrag ...

    Enamine Ltd. and Astex Pharmaceuticals (UK) have cooperated to provide wide access to Astex’ MiniFrag library, an efficient Fragment-based Drug Discovery tool for identification of hot and warm spots of protein targets. The Library is readily available from Enamine in any suitable format, including dry samples or assay-ready high concentration (1M, 100mM) aqueous soaks in containers of preferred type. The detected MiniFrag hits can be followed-up with a wide range of stock available and synthetically feasible derivatives as well as with building blocks for introduction of the relevant structural features for lead optimization.

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DKK-1 Inhibitors library

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3 010 compounds

We used both docking and ligand-based approaches to assemble this subset. Specifically, the DKK1/LRP6 protein-protein interaction (PPI) interface was utilized to select matching ligands from our selection of drug-like compounds (2 709 985 total available molecules). For the docking approach we took into consideration data on analogues of NCI8642, a reported DKK-1/LRP6 interaction inhibitor. Specifically, we focused our design on topological and charge distribution features of the critical Dkk-1 loop that binds to LRP6. We reasoned that blocking/destabilizing this loop feature of the DKK-1/LRP6 PPI may yield modulators and/or activators of Wnt signaling while maintaining ‘normal’ Wnt-Fz-LRP6 signaling.

Fig. 1.Binding interface between LRP6 protein and representative ligand from the focused subset.

For the ligand-based approach we used known DKK-1 inhibitor WAY 262611.

Total library size is 3 014 lead-like compounds.

Fig. 2.(a) Pharmacophore model based on WAY-316606; orange – aromatic/heteroaromatic groups, green-hydrophobic pharmacophore (halogen, CF 3, CHF 2, Me, Et, iPr etc.), blue-positively charged moiety ( +NH 3Alk, +NH 2Alk 2, +NHAlk 3etc.); (b) Superposition of WAY-316606 and our pharmacophore construct used in (sub)library design.

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