HG-12-6

• CAT Number: I017154
• CAS Number: 2222354-57-4
• Molecular Formula: C₂₉H₂₇F₃N₆O₂S
• Molecular Weight: 580.62
• Purity: ≥95%
• Target: IRAK

HG-12-6 is a type II inhibitor of IRAK4. HG-12-6 shows preferential binding to unphosphorylated inactive IRAK4 with an IC50 of 165 nM. HG-12-6 can modulate IRAK4 activity in autoimmunity and inflammation[1].The in-house compound HG-12-6 has a similar chemical scaffold as Ponatinib. The most differentiating components are the head of the inhibitor and the lack of a methyl substituent on ring A. Without the methyl substituent on ring A, the entire HG-12-6 molecule shifts inward to the ATP pocket in comparison with the binding mode of Ponatinib[1].
HG-12-6 has a better binding affinity for the unphosphorylated inactive IRAK4 kinase domain (IC50 of 165 nM) than the phosphorylated active IRAK4 kinase domain (IC50 of 2876 nM)[1].

Reference

[1]. Wang L, et al. Conformational flexibility and inhibitor binding to unphosphorylated interleukin-1 receptor-associated kinase 4 (IRAK4). J Biol Chem. 2019 Mar 22;294(12):4511-4519.