High affinity immunoglobulin epsilon receptor subunit alpha
High affinity immunoglobulin epsilon receptor subunit beta
High affinity immunoglobulin epsilon receptor subunit gamma
キーワード
IMMUNE SYSTEM / IgE / high-affinity IgE receptor / allergy
機能・相同性
機能・相同性情報
Platelet Adhesion to exposed collagen / serotonin secretion / Fc epsilon receptor (FCERI) signaling / Dectin-2 family / IgE receptor activity / Fc-epsilon receptor I complex / Role of LAT2/NTAL/LAB on calcium mobilization / Fc receptor mediated stimulatory signaling pathway / T cell differentiation involved in immune response / negative regulation of mast cell apoptotic process ...Platelet Adhesion to exposed collagen / serotonin secretion / Fc epsilon receptor (FCERI) signaling / Dectin-2 family / IgE receptor activity / Fc-epsilon receptor I complex / Role of LAT2/NTAL/LAB on calcium mobilization / Fc receptor mediated stimulatory signaling pathway / T cell differentiation involved in immune response / negative regulation of mast cell apoptotic process / GPVI-mediated activation cascade / FCERI mediated MAPK activation / mast cell activation / mast cell apoptotic process / Fc-gamma receptor III complex / FCERI mediated Ca+2 mobilization / FCERI mediated NF-kB activation / positive regulation of interleukin-3 production / Cell surface interactions at the vascular wall / serotonin secretion by platelet / positive regulation of mast cell cytokine production / neutrophil activation involved in immune response / positive regulation of mast cell degranulation / Fc-gamma receptor signaling pathway / positive regulation of type III hypersensitivity / regulation of platelet activation / positive regulation of type IIa hypersensitivity / IgE binding / leukotriene biosynthetic process / positive regulation of protein localization to cell surface / positive regulation of type I hypersensitivity / interleukin-3-mediated signaling pathway / positive regulation of granulocyte macrophage colony-stimulating factor production / IgG binding / phagocytosis, engulfment / mast cell degranulation / positive regulation of interleukin-4 production / antigen processing and presentation of exogenous peptide antigen via MHC class I / immunoglobulin mediated immune response / positive regulation of interleukin-10 production / cellular response to low-density lipoprotein particle stimulus / regulation of immune response / neutrophil chemotaxis / Neutrophil degranulation / positive regulation of calcium-mediated signaling / positive regulation of phagocytosis / osteoclast differentiation / integrin-mediated signaling pathway / protein localization to plasma membrane / establishment of localization in cell / calcium-mediated signaling / antigen processing and presentation of exogenous peptide antigen via MHC class II / positive regulation of immune response / receptor internalization / positive regulation of interleukin-6 production / positive regulation of tumor necrosis factor production / cell surface receptor signaling pathway / defense response to bacterium / immune response / membrane raft / innate immune response / external side of plasma membrane / cell surface / signal transduction / protein homodimerization activity / metal ion binding / identical protein binding / plasma membrane 類似検索 - 分子機能
ジャーナル: Sci Signal / 年: 2024 タイトル: Architecture of the high-affinity immunoglobulin E receptor. 著者: Zhikuan Zhang / Moeko Yui / Umeharu Ohto / Toshiyuki Shimizu / 要旨: The high-affinity immunoglobulin E (IgE) receptor (FcεRI) drives type I hypersensitivity in response to allergen-specific IgE. FcεRI is a multimeric complex typically composed of one α, one β, ...The high-affinity immunoglobulin E (IgE) receptor (FcεRI) drives type I hypersensitivity in response to allergen-specific IgE. FcεRI is a multimeric complex typically composed of one α, one β, and two disulfide-linked γ subunits. The α subunit binds to the fragment crystallizable (Fc) region of IgE (Fcε), whereas the β and γ subunits mediate signaling through their intracellular immunoreceptor tyrosine-based activation motifs (ITAMs). Here, we report cryo-electron microscopy (cryo-EM) structures of the apo state of FcεRI and of FcεRI bound to Fcε. At the transmembrane domain (TMD), the α and γ subunits associate to form a tightly packed, three-helix bundle (αγ bundle) with pseudo-threefold symmetry through extensive hydrophobic and polar interactions. The αγ bundle further assembles with the β subunit to complete the TMD, from which multiple ITAMs might extend into the cytoplasm for downstream signaling. The apo mouse FcεRI essentially forms an identical structure to that of the Fcε-bound sensitized form, suggesting that the binding of Fcε to FcεRI does not alter the overall conformation of the receptor. Furthermore, the juxtamembrane interaction between the extracellular domains (ECDs) of mouse FcεRIα and FcεRIβ is not observed between their human counterparts, which implies potential species-specific differences in receptor stability and activation. Our findings provide a framework for understanding the general structural principles underlying Fc receptor assembly, the signaling mechanism underlying type I hypersensitivity, and the design of efficient antiallergic therapeutics.
履歴
登録
2024年3月21日
登録サイト: PDBJ / 処理サイト: PDBJ
改定 1.0
2024年7月17日
Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: EM metadata / Data content type: EM metadata / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Additional map / Data content type: Additional map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Additional map / Data content type: Additional map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Additional map / Data content type: Additional map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Additional map / Data content type: Additional map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2024年7月17日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / カテゴリ: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name
Highaffinityimmunoglobulinepsilonreceptorsubunitbeta / FcERI / Fc epsilon receptor I beta-chain / IgE Fc receptor subunit beta / Membrane-spanning 4- ...FcERI / Fc epsilon receptor I beta-chain / IgE Fc receptor subunit beta / Membrane-spanning 4-domains subfamily A member 2