+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-30004 | |||||||||
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タイトル | Cryo-EM structure of human secretory immunoglobulin A | |||||||||
マップデータ | ||||||||||
試料 |
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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 / polymeric immunoglobulin binding / dimeric IgA immunoglobulin complex / regulation of T cell homeostatic proliferation / regulation of CD4-positive, alpha-beta T cell proliferation / 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 / polymeric immunoglobulin binding / dimeric IgA immunoglobulin complex / regulation of T cell homeostatic proliferation / regulation of CD4-positive, alpha-beta T cell proliferation / interleukin-2 receptor binding / secretory dimeric IgA immunoglobulin complex / pentameric IgM immunoglobulin complex / monomeric IgA immunoglobulin complex / secretory IgA immunoglobulin complex / response to tacrolimus / Fc receptor signaling pathway / positive regulation of plasma cell differentiation / glycosphingolipid binding / negative regulation of lymphocyte proliferation / IgA binding / negative regulation of T-helper 17 cell differentiation / positive regulation of tissue remodeling / detection of chemical stimulus involved in sensory perception of bitter taste / 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 / interleukin-2-mediated signaling pathway / activated T cell proliferation / kinase activator activity / positive regulation of regulatory T cell differentiation / natural killer cell activation / : / negative regulation of B cell apoptotic process / IgG immunoglobulin complex / Interleukin-2 signaling / positive regulation of immunoglobulin production / azurophil granule membrane / receptor clustering / positive regulation of dendritic spine development / immunoglobulin complex, circulating / immunoglobulin receptor binding / 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 / complement activation, classical pathway / extrinsic apoptotic signaling pathway in absence of ligand / positive regulation of tyrosine phosphorylation of STAT protein / positive regulation of B cell proliferation / antigen binding / negative regulation of protein phosphorylation / cytokine activity / 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 / antibacterial humoral response / protein-macromolecule adaptor activity / positive regulation of cytosolic calcium ion concentration / RAF/MAP kinase cascade / positive regulation of cell growth / protein-containing complex assembly / carbohydrate binding / response to ethanol / 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 / 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 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.15 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. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_30004.map.gz | 9.6 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-30004-v30.xml emd-30004.xml | 16.8 KB 16.8 KB | 表示 表示 | EMDBヘッダ |
FSC (解像度算出) | emd_30004_fsc.xml | 11.4 KB | 表示 | FSCデータファイル |
画像 | emd_30004.png | 43.7 KB | ||
マスクデータ | emd_30004_msk_1.map | 125 MB | マスクマップ | |
その他 | emd_30004_half_map_1.map.gz emd_30004_half_map_2.map.gz | 98.5 MB 98.5 MB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-30004 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-30004 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_30004_validation.pdf.gz | 654 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_30004_full_validation.pdf.gz | 653.6 KB | 表示 | |
XML形式データ | emd_30004_validation.xml.gz | 18.5 KB | 表示 | |
CIF形式データ | emd_30004_validation.cif.gz | 24.2 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-30004 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-30004 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_30004.map.gz / 形式: CCP4 / 大きさ: 125 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.828 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-マスク #1
ファイル | emd_30004_msk_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_30004_half_map_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #2
ファイル | emd_30004_half_map_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-試料の構成要素
-全体 : Ternary complex of IgA-Fc with the J chain and pIgR/SC
全体 | 名称: Ternary complex of IgA-Fc with the J chain and pIgR/SC |
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要素 |
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-超分子 #1: Ternary complex of IgA-Fc with the J chain and pIgR/SC
超分子 | 名称: Ternary complex of IgA-Fc with the J chain and pIgR/SC タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
組換発現 | 生物種: Homo sapiens (ヒト) |
-分子 #1: Interleukin-2,Immunoglobulin heavy constant alpha 1
分子 | 名称: Interleukin-2,Immunoglobulin heavy constant alpha 1 / タイプ: protein_or_peptide / ID: 1 / コピー数: 4 / 光学異性体: LEVO |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
分子量 | 理論値: 31.445693 KDa |
組換発現 | 生物種: Homo sapiens (ヒト) |
配列 | 文字列: MYRMQLLSCI ALSLALVTNS ARIHMSAWSH PQFEKGGGSG GGSGGSAWSH PQFEKIDTTC CHPRLSLHRP ALEDLLLGSE ANLTCTLTG LRDASGVTFT WTPSSGKSAV QGPPERDLCG CYSVSSVLPG CAEPWNHGKT FTCTAAYPES KTPLTATLSK S GNTFRPEV ...文字列: MYRMQLLSCI ALSLALVTNS ARIHMSAWSH PQFEKGGGSG GGSGGSAWSH PQFEKIDTTC CHPRLSLHRP ALEDLLLGSE ANLTCTLTG LRDASGVTFT WTPSSGKSAV QGPPERDLCG CYSVSSVLPG CAEPWNHGKT FTCTAAYPES KTPLTATLSK S GNTFRPEV HLLPPPSEEL ALNELVTLTC LARGFSPKDV LVRWLQGSQE LPREKYLTWA SRQEPSQGTT TFAVTSILRV AA EDWKKGD TFSCMVGHEA LPLAFTQKTI DRLAGKPTHV NVSVVMAEVD GTCY |
-分子 #2: Immunoglobulin J chain
分子 | 名称: Immunoglobulin J chain / タイプ: protein_or_peptide / ID: 2 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
分子量 | 理論値: 19.225762 KDa |
組換発現 | 生物種: Homo sapiens (ヒト) |
配列 | 文字列: MKNHLLFWGV LAVFIKAVHV KAQEDERIVL VDNKCKCARI TSRIIRSSED PNEDIVERNI RIIVPLNNRE NISDPTSPLR TRFVYHLSD LCKKCDPTEV ELDNQIVTAT QSNICDEDSA TETCYTYDRN KCYTAVVPLV YGGETKMVET ALTPDACYPD H HHHHHHH |
-分子 #3: Polymeric immunoglobulin receptor
分子 | 名称: Polymeric immunoglobulin receptor / タイプ: protein_or_peptide / ID: 3 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
分子量 | 理論値: 63.306336 KDa |
組換発現 | 生物種: Homo sapiens (ヒト) |
配列 | 文字列: MLLFVLTCLL AVFPAISTKS PIFGPEEVNS VEGNSVSITC YYPPTSVNRH TRKYWCRQGA RGGCITLISS EGYVSSKYAG RANLTNFPE NGTFVVNIAQ LSQDDSGRYK CGLGINSRGL SFDVSLEVSQ GPGLLNDTKV YTVDLGRTVT INCPFKTENA Q KRKSLYKQ ...文字列: MLLFVLTCLL AVFPAISTKS PIFGPEEVNS VEGNSVSITC YYPPTSVNRH TRKYWCRQGA RGGCITLISS EGYVSSKYAG RANLTNFPE NGTFVVNIAQ LSQDDSGRYK CGLGINSRGL SFDVSLEVSQ GPGLLNDTKV YTVDLGRTVT INCPFKTENA Q KRKSLYKQ IGLYPVLVID SSGYVNPNYT GRIRLDIQGT GQLLFSVVIN QLRLSDAGQY LCQAGDDSNS NKKNADLQVL KP EPELVYE DLRGSVTFHC ALGPEVANVA KFLCRQSSGE NCDVVVNTLG KRAPAFEGRI LLNPQDKDGS FSVVITGLRK EDA GRYLCG AHSDGQLQEG SPIQAWQLFV NEESTIPRSP TVVKGVAGGS VAVLCPYNRK ESKSIKYWCL WEGAQNGRCP LLVD SEGWV KAQYEGRLSL LEEPGNGTFT VILNQLTSRD AGFYWCLTNG DTLWRTTVEI KIIEGEPNLK VPGNVTAVLG ETLKV PCHF PCKFSSYEKY WCKWNNTGCQ ALPSQDEGPS KAFVNCDENS RLVSLTLNLV TRADEGWYWC GVKQGHFYGE TAAVYV AVE ERHHHHHHHH |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 0.3 mg/mL |
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緩衝液 | pH: 7.4 |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277.15 K |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | #0 - Image recording ID: 1 #0 - フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) #0 - 検出モード: SUPER-RESOLUTION / #0 - 平均電子線量: 59.74 e/Å2 / #1 - Image recording ID: 2 #1 - フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) #1 - 平均電子線量: 11.668 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |