negative regulation of B cell activation / G beta:gamma signalling through BTK / RHO GTPases Activate WASPs and WAVEs / FCERI mediated Ca+2 mobilization / G alpha (q) signalling events / G alpha (12/13) signalling events / negative regulation of leukocyte proliferation / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / Regulation of actin dynamics for phagocytic cup formation / proteoglycan catabolic process ...negative regulation of B cell activation / G beta:gamma signalling through BTK / RHO GTPases Activate WASPs and WAVEs / FCERI mediated Ca+2 mobilization / G alpha (q) signalling events / G alpha (12/13) signalling events / negative regulation of leukocyte proliferation / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / Regulation of actin dynamics for phagocytic cup formation / proteoglycan catabolic process / monocyte proliferation / positive regulation of interleukin-17A production / eosinophil homeostasis / positive regulation of type III hypersensitivity / B cell affinity maturation / positive regulation of synoviocyte proliferation / histamine secretion by mast cell / neutrophil homeostasis / cellular response to molecule of fungal origin / positive regulation of type I hypersensitivity / cellular response to interleukin-7 / DAP12 signaling / negative regulation of cytokine production / positive regulation of immunoglobulin production / positive regulation of NLRP3 inflammasome complex assembly / phospholipase activator activity / negative regulation of interleukin-10 production / negative regulation of B cell proliferation / phosphatidylinositol-3,4,5-trisphosphate binding / phospholipase binding / positive regulation of phagocytosis / positive regulation of B cell proliferation / cell maturation / non-specific protein-tyrosine kinase / B cell receptor signaling pathway / non-membrane spanning protein tyrosine kinase activity / positive regulation of interleukin-6 production / cellular response to reactive oxygen species / positive regulation of tumor necrosis factor production / T cell receptor signaling pathway / cytoplasmic vesicle / protein tyrosine kinase activity / adaptive immune response / response to lipopolysaccharide / intracellular signal transduction / membrane raft / innate immune response / apoptotic process / perinuclear region of cytoplasm / ATP binding / identical protein binding / nucleus / metal ion binding / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
米国
引用
ジャーナル: Elife / 年: 2024 タイトル: Conformational heterogeneity of the BTK PHTH domain drives multiple regulatory states. 著者: David Yin-Wei Lin / Lauren E Kueffer / Puneet Juneja / Thomas E Wales / John R Engen / Amy H Andreotti / 要旨: Full-length Bruton's tyrosine kinase (BTK) has been refractory to structural analysis. The nearest full-length structure of BTK to date consists of the autoinhibited SH3-SH2-kinase core. Precisely ...Full-length Bruton's tyrosine kinase (BTK) has been refractory to structural analysis. The nearest full-length structure of BTK to date consists of the autoinhibited SH3-SH2-kinase core. Precisely how the BTK N-terminal domains (the Pleckstrin homology/Tec homology [PHTH] domain and proline-rich regions [PRR] contain linker) contribute to BTK regulation remains unclear. We have produced crystals of full-length BTK for the first time but despite efforts to stabilize the autoinhibited state, the diffraction data still reveal only the SH3-SH2-kinase core with no electron density visible for the PHTH-PRR segment. Cryo-electron microscopy (cryoEM) data of full-length BTK, on the other hand, provide the first view of the PHTH domain within full-length BTK. CryoEM reconstructions support conformational heterogeneity in the PHTH-PRR region wherein the globular PHTH domain adopts a range of states arrayed around the autoinhibited SH3-SH2-kinase core. On the way to activation, disassembly of the SH3-SH2-kinase core opens a new autoinhibitory site on the kinase domain for PHTH domain binding that is ultimately released upon interaction of PHTH with phosphatidylinositol (3,4,5)-trisphosphate. Membrane-induced dimerization activates BTK and we present here a crystal structure of an activation loop swapped BTK kinase domain dimer that likely represents the conformational state leading to trans-autophosphorylation. Together, these data provide the first structural elucidation of full-length BTK and allow a deeper understanding of allosteric control over the BTK kinase domain during distinct stages of activation.
根拠: Full-length Btk was purified as a monomer by gel-filtration. The domain-swapped dimer was formed during crystallization. The domain-swapped dimer resembles the structure 4XI2.
分子量: 664.796 Da / 分子数: 1 / 由来タイプ: 合成 / 式: C37H44N8O4 / タイプ: SUBJECT OF INVESTIGATION
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手法: X線回折 / 使用した結晶の数: 1
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マシュー密度: 3.29 Å3/Da / 溶媒含有率: 66.06 % 解説: Monomer proteins at 18 mg/ml in 20 mM TRIS/HCl, pH 8.0, 150 mM NaCl, 10% glycerol 5 mM DTT were mixed with an equal volume of the precipitant solution, and then suspend over 0.25 ml of ...解説: Monomer proteins at 18 mg/ml in 20 mM TRIS/HCl, pH 8.0, 150 mM NaCl, 10% glycerol 5 mM DTT were mixed with an equal volume of the precipitant solution, and then suspend over 0.25 ml of precipitant solution. Leaf-shaped hexagonal crystals grew to up to 0.4 mm on a side after a period of two weeks. Crystals were frozen by transferring them, in six sequential steps, to a solution containing 0.1M Bis-Tris Propane, pH 7.5, 0.2M potassium thiocyanate, 20% PEG 3350 and 20% glycerol.