4wvl

Structure-Guided DOT1L Probe Optimization by Label-Free Ligand Displacement

spinqualitylabelsall models 4wvl, resolution 2.41Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4wvl is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.41Å Ligands: 3US, EDO, GOL, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DOT1L_HUMAN Histone methyltransferase. Methylates 'Lys-79' of histone H3. Nucleosomes are preferred as substrate compared to free histones. Binds to DNA. Publication Abstract from PubMed The DOT1L lysine methyltransferase has emerged as a validated therapeutic target in MLL-rearranged (MLLr) acute leukemias. Although S-adenosylmethionine competitive inhibitors have demonstrated pharmacological proof-of-principle in MLLr-leukemia, these compounds require further optimization to improve cellular potency and pharmacokinetic stability. Limiting DOT1L inhibitor discovery and ligand optimization have been complex biochemical methods often using radionucleotides and cellular methods requiring prolonged culture. We therefore developed a new suite of assay technologies that allows comparative assessment of chemical tools for DOT1L in a miniaturized format. Coupling these assays with structural information, we developed new insights into DOT1L ligand binding and identified several functionalized probes with increased cellular potency (IC50 values ~10nM) and excellent selectivity for DOT1L. Together these assay technologies define a platform capability for discovery and optimization of small-molecule DOT1L inhibitors. Structure-Guided DOT1L Probe Optimization by Label-Free Ligand Displacement.,Yi JS, Fderation AJ, Qi J, Dhe-Paganon S, Hadler M, Xu X, St Pierre R, Varca AC, Wu L, Marineau JJ, Smith WB, Souza A, Chory EJ, Armstrong SA, Bradner JE ACS Chem Biol. 2014 Nov 14. PMID:25397901 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Histone methyltransferase 3D structures

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