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 / 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 ...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 / 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 / histamine secretion by mast cell / positive regulation of synoviocyte proliferation / negative regulation of leukocyte proliferation / 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 NLRP3 inflammasome complex assembly / phospholipase activator activity / negative regulation of interleukin-10 production / negative regulation of B cell proliferation / phospholipase binding / phosphatidylinositol-3,4,5-trisphosphate binding / positive regulation of immunoglobulin production / positive regulation of phagocytosis / positive regulation of B cell proliferation / cell maturation / response to organic substance / B cell receptor signaling pathway / non-specific protein-tyrosine kinase / non-membrane spanning protein tyrosine kinase activity / cellular response to reactive oxygen species / positive regulation of interleukin-6 production / positive regulation of tumor necrosis factor production / T cell receptor signaling pathway / cytoplasmic vesicle / protein tyrosine kinase activity / response to lipopolysaccharide / 獲得免疫系 / intracellular signal transduction / 脂質ラフト / リン酸化 / 自然免疫系 / apoptotic process / perinuclear region of cytoplasm / ATP binding / identical protein binding / metal ion binding / 細胞核 / 細胞膜 / 細胞質基質 / 細胞質 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.