3q4t

Crystal structure of Activin receptor type-IIA (ACVR2A) kinase domain in complex with dorsomorphin

spinqualitylabelsall models 3q4t, resolution 1.96Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3q4t is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: EDO, PG4, SO4, TAK Gene: ACVR2, ACVR2A (HUMAN) Activity: Receptor protein serine/threonine kinase, with EC number 2.7.11.30 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [AVR2A_HUMAN] On ligand binding, forms a receptor complex consisting of two type II and two type I transmembrane serine/threonine kinases. Type II receptors phosphorylate and activate type I receptors which autophosphorylate, then bind and activate SMAD transcriptional regulators. Receptor for activin A, activin B and inhibin A. Publication Abstract from PubMed GDF8, or myostatin, is a member of the TGF-beta superfamily of secreted polypeptide growth factors. GDF8 is a potent negative regulator of myogenesis both in vivo and in vitro. We found that GDF8 signaling was inhibited by the small molecule ATP competitive inhibitors Dorsomorphin and LDN-193189. These compounds were previously shown to be potent inhibitors of BMP signaling by binding to the type BMP type I receptors ALK1/2/3/6. We present the crystal structure of the type II receptor ActRIIA with dorsomorphin, and demonstrate that dorsomorphin or LDN-193189 target GDF8 induced Smad2/3 signaling and repression of myogenic transcription factors. As a result, both inhibitors rescue myogenesis in myoblasts treated with GDF8. As revealed by quantitative live cell microscopy, treatment with dorsomorphin or LDN-193189 promoted the contractile activity of myotubular networks in vitro. We therefore suggest these inhibitors as suitable tools to promote functional myogenesis. Small Molecules Dorsomorphin and LDN-193189 Inhibit Myostatin/GDF8 Signaling and Promote Functional Myoblast Differentiation.,Horbelt D, Boergermann JH, Chaikuad A, Alfano I, Williams E, Lukonin I, Timmel T, Bullock AN, Knaus P J Biol Chem. 2014 Nov 3. pii: jbc.M114.604397. PMID:25368322 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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