Optimising seeding of normal and FOP cells for a later assay – prettier than expected

Further down the line I want to be able to test the activation of the BMP signalling pathway downstream of the ALK2 receptor. For this I plan to use the alkaline phosphatase gene as a readout – it’s a well known gene activated downstream of BMP signalling so a lot of easy to use assays Read More …

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 …

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 …

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 …

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 …

Validated antibodies for ALS research: the ALS-RAP project

We are part of ALS-RAP, the ALS (Amyotrophic Lateral Sclerosis) Reproducible Antibody Platform. We’re addressing one of the big conundrums to biomedical research: the lack, or the poor quality, of many antibodies used for research ranging from cell biology to histopathology. ALS, also called MND (motor neurone disease), is a group of diseases that cause Read More …

Introducing the team: The Gileadi Group in Oxford.

Hi! I’m Opher Gileadi, I head a group at the Structural Genomics Consortium (SGC) in Oxford. For many years, we’ve been looking at proteins involved in human. We’ve looked at a wide variety of proteins: from DNA repair enzymes and transcription factors to enzymes involved in signalling. In most cases, we focus on early work: Read More …

Update on crystal hits, XChem and more purification

Things have been really busy in the lab the last few weeks. I’ve done a couple of purifications of ACVR1 (ALK2), which I’ll post in Zenodo (getting loads of protein now), but probably won’t write up the details of every purification every single time anymore, as it’s the same process every time for this construct. Read More …

Generating mutations in the GS domain of ALK2

This week one of the things I’ve been working on is the final set of mutations in the GS domain of Alk2 to help us unpick the influence of phosphorylation on function. That, however, is a bit of a mouthful so let’s unpack it a bit. I said in my last blog post that we Read More …