登録情報 データベース : EMDB / ID : EMD-30008 構造の表示 ダウンロードとリンクタイトル Cryo-EM structure of human secretory immunoglobulin A in complex with the N-terminal domain of SpsA マップデータ 詳細 試料複合体 : Quadruple complex of human secretory immunoglobulin A with the N-terminal domain of SpsAタンパク質・ペプチド : Interleukin-2,Immunoglobulin heavy constant alpha 1タンパク質・ペプチド : Immunoglobulin J chainタンパク質・ペプチド : Polymeric immunoglobulin receptorタンパク質・ペプチド : SigA binding protein 詳細機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
polymeric immunoglobulin receptor activity / immunoglobulin transcytosis in epithelial cells mediated by polymeric immunoglobulin receptor / kappa-type opioid receptor binding / dimeric IgA immunoglobulin complex / regulation of CD4-positive, alpha-beta T cell proliferation / regulation of T cell homeostatic proliferation / polymeric immunoglobulin binding / interleukin-2 receptor binding / secretory dimeric IgA immunoglobulin complex / pentameric IgM immunoglobulin complex ... polymeric immunoglobulin receptor activity / immunoglobulin transcytosis in epithelial cells mediated by polymeric immunoglobulin receptor / kappa-type opioid receptor binding / dimeric IgA immunoglobulin complex / regulation of CD4-positive, alpha-beta T cell proliferation / regulation of T cell homeostatic proliferation / polymeric immunoglobulin binding / interleukin-2 receptor binding / secretory dimeric IgA immunoglobulin complex / pentameric IgM immunoglobulin complex / monomeric IgA immunoglobulin complex / secretory IgA immunoglobulin complex / response to tacrolimus / positive regulation of plasma cell differentiation / glycosphingolipid binding / negative regulation of lymphocyte proliferation / Fc receptor signaling pathway / negative regulation of T-helper 17 cell differentiation / IgA binding / positive regulation of tissue remodeling / glomerular filtration / RUNX1 and FOXP3 control the development of regulatory T lymphocytes (Tregs) / detection of chemical stimulus involved in sensory perception of bitter taste / IgA immunoglobulin complex / leukocyte activation involved in immune response / positive regulation of isotype switching to IgG isotypes / interleukin-2-mediated signaling pathway / activated T cell proliferation / natural killer cell activation / kinase activator activity / positive regulation of regulatory T cell differentiation / : / negative regulation of B cell apoptotic process / IgG immunoglobulin complex / Interleukin-2 signaling / positive regulation of immunoglobulin production / azurophil granule membrane / positive regulation of dendritic spine development / receptor clustering / positive regulation of activated T cell proliferation / positive regulation of respiratory burst / positive regulation of interleukin-17 production / humoral immune response / T cell differentiation / Interleukin receptor SHC signaling / Scavenging of heme from plasma / immunoglobulin complex, circulating / immunoglobulin receptor binding / positive regulation of B cell proliferation / extrinsic apoptotic signaling pathway in absence of ligand / positive regulation of tyrosine phosphorylation of STAT protein / complement activation, classical pathway / negative regulation of protein phosphorylation / cytokine activity / antigen binding / Cell surface interactions at the vascular wall / B cell receptor signaling pathway / growth factor activity / epidermal growth factor receptor signaling pathway / negative regulation of inflammatory response / positive regulation of inflammatory response / positive regulation of type II interferon production / cell-cell signaling / protein-macromolecule adaptor activity / antibacterial humoral response / positive regulation of cytosolic calcium ion concentration / RAF/MAP kinase cascade / positive regulation of cell growth / carbohydrate binding / protein-containing complex assembly / response to ethanol / adaptive immune response / transcription by RNA polymerase II / blood microparticle / receptor complex / cell adhesion / immune response / innate immune response / positive regulation of cell population proliferation / Neutrophil degranulation / negative regulation of apoptotic process / protein homodimerization activity / positive regulation of transcription by RNA polymerase II / extracellular space / extracellular exosome / extracellular region / plasma membrane 類似検索 - 分子機能 RICH domain / RICH domain superfamily / RICH domain / : / Interleukin-2 / Interleukin-2, conserved site / Interleukin 2 / Interleukin-2 signature. / Interleukin-2 family / Immunoglobulin J chain ... RICH domain / RICH domain superfamily / RICH domain / : / Interleukin-2 / Interleukin-2, conserved site / Interleukin 2 / Interleukin-2 signature. / Interleukin-2 family / Immunoglobulin J chain / Immunoglobulin J chain / : / Choline-binding repeat / Putative cell wall binding repeat / Cell wall/choline-binding repeat / Cell wall-binding repeat profile. / YSIRK type signal peptide / Four-helical cytokine-like, core / YSIRK Gram-positive signal peptide / Immunoglobulin / Immunoglobulin domain / : / Immunoglobulin V-Type / Immunoglobulin V-set domain / Immunoglobulin V-set domain / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulin subtype / Immunoglobulin / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold 類似検索 - ドメイン・相同性 SigA binding protein / Immunoglobulin J chain / Polymeric immunoglobulin receptor / Immunoglobulin heavy constant alpha 1 / Interleukin-2 類似検索 - 構成要素生物種 Homo sapiens (ヒト) / Streptococcus pneumoniae (肺炎レンサ球菌)手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 3.27 Å 詳細 データ登録者Wang Y / Wang G / Li Y / Xiao J 資金援助 中国, 1件 詳細 詳細を隠すOrganization Grant number 国 National Science Foundation (NSF, China) 中国
引用ジャーナル : Cell Res / 年 : 2020タイトル : Structural insights into secretory immunoglobulin A and its interaction with a pneumococcal adhesin.著者 : Yuxin Wang / Guopeng Wang / Yaxin Li / Qinyu Zhu / Hao Shen / Ning Gao / Junyu Xiao / 要旨 : Secretory Immunoglobulin A (SIgA) is the most abundant antibody at the mucosal surface. It possesses two additional subunits besides IgA: the joining chain (J-chain) and secretory component (SC). SC ... Secretory Immunoglobulin A (SIgA) is the most abundant antibody at the mucosal surface. It possesses two additional subunits besides IgA: the joining chain (J-chain) and secretory component (SC). SC is the ectodomain of the polymeric immunoglobulin receptor (pIgR), which functions to transport IgA to the mucosa. How the J-chain and pIgR/SC facilitate the assembly and secretion of SIgA remains incompletely understood. Furthermore, during the infection of Streptococcus pneumoniae, the pneumococcal adhesin SpsA hijacks pIgR/SC and SIgA to gain entry to human cells and evade host defense. How SpsA targets pIgR/SC and SIgA also remains elusive. Here we report a cryo-electron microscopy structure of the Fc region of IgA1 (Fcα) in complex with the J-chain and SC (Fcα-J-SC), which reveals the organization principle of SIgA. We also present a structure of Fcα-J-SC complexed with SpsA, which uncovers the specific interactions between SpsA and human pIgR/SC. These results advance the molecular understanding of SIgA and shed light on S. pneumoniae pathogenesis. 履歴 登録 2020年2月12日 - ヘッダ(付随情報) 公開 2020年5月27日 - マップ公開 2020年5月27日 - 更新 2020年7月22日 - 現状 2020年7月22日 処理サイト : PDBj / 状態 : 公開
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