3qcs
From Proteopedia
Phosphoinositide-Dependent Kinase-1 (PDK1) kinase domain with 6-[2-Amino-6-(4-morpholinyl)-4-pyrimidinyl]-1H-indazol-3-amine
Structural highlights
Function[PDPK1_HUMAN] Serine/threonine kinase which acts as a master kinase, phosphorylating and activating a subgroup of the AGC family of protein kinases. Its targets include: protein kinase B (PKB/AKT1, PKB/AKT2, PKB/AKT3), p70 ribosomal protein S6 kinase (RPS6KB1), p90 ribosomal protein S6 kinase (RPS6KA1, RPS6KA2 and RPS6KA3), cyclic AMP-dependent protein kinase (PRKACA), protein kinase C (PRKCD and PRKCZ), serum and glucocorticoid-inducible kinase (SGK1, SGK2 and SGK3), p21-activated kinase-1 (PAK1), protein kinase PKN (PKN1 and PKN2). Plays a central role in the transduction of signals from insulin by providing the activating phosphorylation to PKB/AKT1, thus propagating the signal to downstream targets controlling cell proliferation and survival, as well as glucose and amino acid uptake and storage. Negatively regulates the TGF-beta-induced signaling by: modulating the association of SMAD3 and SMAD7 with TGF-beta receptor, phosphorylating SMAD2, SMAD3, SMAD4 and SMAD7, preventing the nuclear translocation of SMAD3 and SMAD4 and the translocation of SMAD7 from the nucleus to the cytoplasm in response to TGF-beta. Activates PPARG transcriptional activity and promotes adipocyte differentiation. Activates the NF-kappa-B pathway via phosphorylation of IKKB. The tyrosine phosphorylated form is crucial for the regulation of focal adhesions by angiotensin II. Controls proliferation, survival, and growth of developing pancreatic cells. Participates in the regulation of Ca(2+) entry and Ca(2+)-activated K(+) channels of mast cells. Essential for the motility of vascular endothelial cells (ECs) and is involved in the regulation of their chemotaxis. Plays a critical role in cardiac homeostasis by serving as a dual effector for cell survival and beta-adrenergic response. Plays an important role during thymocyte development by regulating the expression of key nutrient receptors on the surface of pre-T cells and mediating Notch-induced cell growth and proliferative responses. Provides negative feedback inhibition to toll-like receptor-mediated NF-kappa-B activation in macrophages. Isoform 3 is catalytically inactive.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] Publication Abstract from PubMedPhosphoinositide-dependent protein kinase-1(PDK1) is a master regulator of the AGC family of kinases and an integral component of the PI3K/AKT/mTOR pathway. As this pathway is among the most commonly deregulated across all cancers, a selective inhibitor of PDK1 might have utility as an anticancer agent. Herein we describe our lead optimization of compound 1 toward highly potent and selective PDK1 inhibitors via a structure-based design strategy. The most potent and selective inhibitors demonstrated submicromolar activity as measured by inhibition of phosphorylation of PDK1 substrates as well as antiproliferative activity against a subset of AML cell lines. In addition, reduction of phosphorylation of PDK1 substrates was demonstrated in vivo in mice bearing OCl-AML2 xenografts. These observations demonstrate the utility of these molecules as tools to further delineate the biology of PDK1 and the potential pharmacological uses of a PDK1 inhibitor. Structure-Based Design of Potent and Selective 3-Phosphoinositide-Dependent Kinase-1 (PDK1) Inhibitors.,Medina JR, Becker CJ, Blackledge CW, Duquenne C, Feng Y, Grant SW, Heerding D, Li WH, Miller WH, Romeril SP, Scherzer D, Shu A, Bobko MA, Chadderton AR, Dumble M, Gardiner CM, Gilbert S, Liu Q, Rabindran SK, Sudakin V, Xiang H, Brady PG, Campobasso N, Ward P, Axten JM J Med Chem. 2011 Feb 22. PMID:21341675[16] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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Categories: Human | Non-specific serine/threonine protein kinase | Axten, J M | Becker, C J | Blackledge, C W | Bobko, M A | Brady, P G | Campobasso, N | Chadderton, A R | Dumble, M | Duquenne, C | Feng, Y | Gilbert, S | Gradiner, C M | Grant, S W | Heerding, D | Li, W H | Liu, Q | Medina, J R | Miller, W H | Rabindran, S K | Romeril, S P | Scherzer, D | Shu, A | Sudakin, V | Ward, P | Xiang, H | Agc kinase | Atp & phosphoinositide | Phosphorylation on s241 | Signal transduction | Transferase-transferase inhibitor complex
