Screening of allosteric inhibitors and inhibitors of protein-protein interactions Joel Eggert.

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Screening of allosteric inhibitors and inhibitors of protein-protein interactions Joel Eggert

Kinase inhibitors Orthosteric Foda & Seeliger, 2014.

Kinase inhibitors OrthostericAllosteric Foda & Seeliger, 2014.

Allosteric inhibitors Advantages – Highly specific – Lower chances of side effects – Overcome clinically acquired resistance – Barely explored

Allosteric inhibitors Disadvantages – Allosteric sites are often unknown – Hard to predict the outcome – Higher divergence between species

High-throughput screen of allosteric inhibitors Goal: identify targets that can stabilize the enzyme in a catalytically inactive conformation

Recombinant cSrc Site-directed mutagenesis + Cys activation loop Acrylodan O/N Mass spec Triplicates: acrylodan-cSrc (100 nM) Compounds: 10 and 50 µM min, RT

Simard et al., 2009

inhibitorbindingkinase Type Iactive siteactive state Type IIactive + allosteric siteinactive state Type IIIallosteric siteinactive state Simard et al., 2009

inhibitorbindingkinase Type Iactive siteactive state Type IIactive + allosteric siteinactive state Type IIIallosteric siteinactive state Simard et al., 2009

inhibitorbindingkinase Type Iactive siteactive state Type IIactive + allosteric siteinactive state Type IIIallosteric siteinactive state Simard et al., 2009

Inhibitors of protein-protein interactions

Chemical library: > compounds ( kDa)

Fragment-screening and fragment- based drug design (FBDD) Low molecular weight compounds NMR Bind – target protein? Weak interactions [mM] Fragment hits Structure-based optimization (fragment linking etc) Lead compound

Sheng et al., 2015

References Foda, Z. H. & Seeliger, M. A. Kinase inhibitors: An allosteric add-on. Nat. Chem. Biol. 10, 796–797 (2014). Nussinov, R. & Tsai, C.-J. Allostery in disease and in drug discovery. Cell 153, 293–305 (2013). Hajduk, P. J. & Greer, J. A decade of fragment-based drug design: strategic advances and lessons learned. Nat. Rev. Drug Discov. 6, 211–219 (2007). Simard, J. R. et al. A new screening assay for allosteric inhibitors of cSrc. Nat. Chem. Biol. 5, 394–396 (2009). Sheng, C., Dong, G., Miao, Z., Zhang, W. & Wang, W. State-of-the-art strategies for targeting protein-protein interactions by small-molecule inhibitors. Chem. Soc. Rev. 44, 8238–8259 (2015).