A new ALK2 structure, and proof that mistakes in the lab aren’t always a bad thing

Hello everyone and happy New Year! I really, really wanted to end the year on a high note in December before I went off on holiday, but as it turned out, I didn’t have enough time to set up 18 plates and write a blog post on the last day. So I’ll just have to Read More …

Selective CDKL2 inhibitors – molecular modeling

At SGC we are interested in developing protein kinase inhibitors with a high selectivity towards other protein kinases. Based on lead compounds from the literature and our group new and selective CDKL2 inhibitors should be designed, synthesized and tested. Carla Alamillo, a former member of our group, worked on this topic and mentioned in her Read More …

Determining the nanoBRET ALK2 IC50 values of 24 new ACVR1/ALK2 inhibitors

In an effort to develop clinical compounds for Diffused Intrinsic Pontine Glioma (DIPG) treatment, new analogues of ACVR1/ALK2 inhibitors are continuously synthesised by Ontario Institute for Cancer Research (OICR) and Charles River Laboratories (CRL). I will provide prompt feedback of the cellular assay results to guide their design of new compounds. I determined the potency Read More …

Synthesis and testing of follow up compounds based on HAO1 fragment 6, bound at the tetramer interface.

Hello again! A few posts ago (here), I presented one fragment bound at the interface between two subunits of the HAO1 tetramer (figure 1 will refresh your memory). Our idea to optimize this fragment into an inhibitor would be to make it bigger so that it disrupts the HAO1 tetramer. I would expect this to Read More …

USP Zf-UBD Crystallography Pipeline Pt 2.

In a previous post, I described the importance of solving the structure of other USPs that have a Zf-UBD for the rational design of selective compounds. The last post described the design, cloning, E.coli expression, growth and purification of some of the USP Zf-UBD constructs. As a continuation in my quest to try and crystallize Read More …

Purification and crystallisation of an ALK2/ACVR2/FKPB12 complex.

One problem with working with the isolated kinase domains of ALK2 and it’s type II binding partners, is that the affinity between the kinase domains alone is insufficient to allow complex formation. We know that the two proteins associate with each other in vivo and are co-localised by the domains on the outside of the Read More …

Shorter procedure to access Thieno[2,3-d]pyrimidines

Continuing with the line of delivering a chemical probe for DRAK2/STK17B kinase, we decided to revise the procedure to synthesize analogs with a thieno[2,3-d]pyrimidine core, which are intended to be used as negative control in our DRAK2 inhibition study. We shortened the synthesis of these pyrimidines to 2 steps from the starting material 6-bromo-4-chlorothieno[2,3-d]pyrimidine 1 Read More …

Screening ACVR1 inhibitors on mutant and non-mutant ACVR1 DIPG cells – effectiveness may vary

Hi there! The last month of my life was taken over by making sure my PhD first year report was beautifully polished, but I have returned with results of a small compound screen: These are all compounds that Jong Fu has already tested with his assays so we know they effectively inhibit ACVR1, but I Read More …