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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 6lxw | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of human secretory immunoglobulin A in complex with the N-terminal domain of SpsA | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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キーワード | IMMUNE SYSTEM / immunoglobulin / dimer / transcytosis / secreted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報polymeric immunoglobulin receptor activity / immunoglobulin transcytosis in epithelial cells mediated by polymeric immunoglobulin receptor / kappa-type opioid receptor binding / response to tacrolimus / polymeric immunoglobulin binding / regulation of T cell homeostatic proliferation / regulation of CD4-positive, alpha-beta T cell proliferation / dimeric IgA immunoglobulin complex / interleukin-2 receptor binding / secretory dimeric IgA immunoglobulin complex ...polymeric immunoglobulin receptor activity / immunoglobulin transcytosis in epithelial cells mediated by polymeric immunoglobulin receptor / kappa-type opioid receptor binding / response to tacrolimus / polymeric immunoglobulin binding / regulation of T cell homeostatic proliferation / regulation of CD4-positive, alpha-beta T cell proliferation / dimeric IgA immunoglobulin complex / interleukin-2 receptor binding / secretory dimeric IgA immunoglobulin complex / pentameric IgM immunoglobulin complex / monomeric IgA immunoglobulin complex / secretory IgA immunoglobulin complex / glycosphingolipid binding / positive regulation of plasma cell differentiation / Fc receptor signaling pathway / negative regulation of lymphocyte proliferation / positive regulation of tissue remodeling / IgA binding / negative regulation of T-helper 17 cell differentiation / IgA immunoglobulin complex / RUNX1 and FOXP3 control the development of regulatory T lymphocytes (Tregs) / glomerular filtration / leukocyte activation involved in immune response / positive regulation of isotype switching to IgG isotypes / detection of chemical stimulus involved in sensory perception of bitter taste / interleukin-2-mediated signaling pathway / activated T cell proliferation / IgG immunoglobulin complex / cell surface receptor signaling pathway via STAT / Interleukin-2 signaling / kinase activator activity / natural killer cell activation / immunoglobulin receptor binding / positive regulation of regulatory T cell differentiation / immunoglobulin complex, circulating / negative regulation of B cell apoptotic process / azurophil granule membrane / positive regulation of immunoglobulin production / receptor clustering / positive regulation of dendritic spine development / positive regulation of respiratory burst / positive regulation of interleukin-17 production / positive regulation of activated T cell proliferation / humoral immune response / T cell differentiation / complement activation, classical pathway / Interleukin receptor SHC signaling / Scavenging of heme from plasma / antigen binding / positive regulation of B cell proliferation / extrinsic apoptotic signaling pathway in absence of ligand / cytokine activity / Cell surface interactions at the vascular wall / B cell receptor signaling pathway / growth factor activity / negative regulation of inflammatory response / positive regulation of type II interferon production / epidermal growth factor receptor signaling pathway / positive regulation of inflammatory response / antibacterial humoral response / transmembrane signaling receptor activity / cell-cell signaling / positive regulation of cytosolic calcium ion concentration / carbohydrate binding / RAF/MAP kinase cascade / positive regulation of cell growth / protein-containing complex assembly / response to ethanol / protein-macromolecule adaptor activity / phospholipase C-activating G protein-coupled receptor signaling pathway / blood microparticle / adaptive immune response / transcription by RNA polymerase II / receptor complex / cell adhesion / immune response / innate immune response / positive regulation of cell population proliferation / Neutrophil degranulation / negative regulation of apoptotic process / signal transduction / 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 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト)![]() | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.27 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
データ登録者 | Wang, Y. / Wang, G. / Li, Y. / Xiao, J. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 資金援助 | 中国, 1件
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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. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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構造の表示
| ムービー |
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| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 6lxw.cif.gz | 294.1 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb6lxw.ent.gz | 228.6 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 6lxw.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| 文書・要旨 | 6lxw_validation.pdf.gz | 1.2 MB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 6lxw_full_validation.pdf.gz | 1.2 MB | 表示 | |
| XML形式データ | 6lxw_validation.xml.gz | 56.2 KB | 表示 | |
| CIF形式データ | 6lxw_validation.cif.gz | 88.1 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/lx/6lxw ftp://data.pdbj.org/pub/pdb/validation_reports/lx/6lxw | HTTPS FTP |
-関連構造データ
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リンク
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集合体
| 登録構造単位 | ![]()
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要素
| #1: 抗体 | 分子量: 31445.693 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: IL2, IGHA1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P60568, UniProt: P01876#2: タンパク質 | | 分子量: 19225.762 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: JCHAIN, IGCJ, IGJ / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P01591#3: タンパク質 | | 分子量: 63306.336 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PIGR / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P01833#4: タンパク質 | | 分子量: 36311.113 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: spsA / 発現宿主: Escherichia phage Ecwhy_1 (ファージ) / 参照: UniProt: O33753Has protein modification | Y | |
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-実験情報
-実験
| 実験 | 手法: 電子顕微鏡法 |
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| EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
| 構成要素 | 名称: Quadruple complex of human secretory immunoglobulin A with the N-terminal domain of SpsA タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) |
| 緩衝液 | pH: 7.4 |
| 試料 | 濃度: 0.2 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 急速凍結 | 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K |
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電子顕微鏡撮影
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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| 顕微鏡 | モデル: FEI TITAN KRIOS |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD |
| 撮影 | 電子線照射量: 59.74 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) |
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解析
| ソフトウェア | 名称: PHENIX / バージョン: 1.15.2_3472: / 分類: 精密化 | ||||||||||||||||||||||||
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| EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.27 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 280791 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
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ムービー
コントローラー
万見について




Homo sapiens (ヒト)

中国, 1件
引用
UCSF Chimera










PDBj





















Escherichia phage Ecwhy_1 (ファージ)
