+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8hgh | ||||||
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タイトル | Structure of 2:2 PAPP-A.STC2 complex | ||||||
要素 |
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キーワード | HYDROLASE / metal binding protein | ||||||
機能・相同性 | 機能・相同性情報 regulation of hormone biosynthetic process / pappalysin-1 / response to follicle-stimulating hormone / regulation of store-operated calcium entry / response to vitamin D / negative regulation of multicellular organism growth / detection of maltose stimulus / response to dexamethasone / maltose transport complex / maltose binding ...regulation of hormone biosynthetic process / pappalysin-1 / response to follicle-stimulating hormone / regulation of store-operated calcium entry / response to vitamin D / negative regulation of multicellular organism growth / detection of maltose stimulus / response to dexamethasone / maltose transport complex / maltose binding / carbohydrate transport / maltose transport / maltodextrin transmembrane transport / decidualization / carbohydrate transmembrane transporter activity / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / endoplasmic reticulum unfolded protein response / embryo implantation / ATP-binding cassette (ABC) transporter complex / cell chemotaxis / female pregnancy / Post-translational protein phosphorylation / protein catabolic process / hormone activity / metalloendopeptidase activity / response to peptide hormone / intracellular calcium ion homeostasis / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / metallopeptidase activity / outer membrane-bounded periplasmic space / cellular response to hypoxia / response to oxidative stress / periplasmic space / cell surface receptor signaling pathway / endoplasmic reticulum lumen / negative regulation of gene expression / DNA damage response / heme binding / perinuclear region of cytoplasm / Golgi apparatus / enzyme binding / endoplasmic reticulum / protein homodimerization activity / proteolysis / extracellular space / zinc ion binding / extracellular region / membrane 類似検索 - 分子機能 | ||||||
生物種 | Escherichia coli K-12 (大腸菌) 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: 4.16 Å | ||||||
データ登録者 | Zhong, Q.H. / Chu, H.L. / Wang, G.P. / Zhang, C. / Wei, Y. / Qiao, J. / Hang, J. | ||||||
資金援助 | 中国, 1件
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引用 | ジャーナル: Cell Discov / 年: 2022 タイトル: Structural insights into the covalent regulation of PAPP-A activity by proMBP and STC2. 著者: Qihang Zhong / Honglei Chu / Guopeng Wang / Cheng Zhang / Rong Li / Fusheng Guo / Xinlu Meng / Xiaoguang Lei / Youli Zhou / Ruobing Ren / Lin Tao / Ningning Li / Ning Gao / Yuan Wei / Jie Qiao / Jing Hang / 要旨: Originally discovered in the circulation of pregnant women as a protein secreted by placental trophoblasts, the metalloprotease pregnancy-associated plasma protein A (PAPP-A) is also widely expressed ...Originally discovered in the circulation of pregnant women as a protein secreted by placental trophoblasts, the metalloprotease pregnancy-associated plasma protein A (PAPP-A) is also widely expressed by many other tissues. It cleaves insulin-like growth factor-binding proteins (IGFBPs) to increase the bioavailability of IGFs and plays essential roles in multiple growth-promoting processes. While the vast majority of the circulatory PAPP-A in pregnancy is proteolytically inactive due to covalent inhibition by proform of eosinophil major basic protein (proMBP), the activity of PAPP-A can also be covalently inhibited by another less characterized modulator, stanniocalcin-2 (STC2). However, the structural basis of PAPP-A proteolysis and the mechanistic differences between these two modulators are poorly understood. Here we present two cryo-EM structures of endogenous purified PAPP-A in complex with either proMBP or STC2. Both modulators form 2:2 heterotetramer with PAPP-A and establish extensive interactions with multiple domains of PAPP-A that are distal to the catalytic cleft. This exosite-binding property results in a steric hindrance to prevent the binding and cleavage of IGFBPs, while the IGFBP linker region-derived peptides harboring the cleavage sites are no longer sensitive to the modulator treatment. Functional investigation into proMBP-mediated PAPP-A regulation in selective intrauterine growth restriction (sIUGR) pregnancy elucidates that PAPP-A and proMBP collaboratively regulate extravillous trophoblast invasion and the consequent fetal growth. Collectively, our work reveals a novel covalent exosite-competitive inhibition mechanism of PAPP-A and its regulatory effect on placental function. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8hgh.cif.gz | 598 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8hgh.ent.gz | 467.6 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8hgh.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
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/hg/8hgh ftp://data.pdbj.org/pub/pdb/validation_reports/hg/8hgh | HTTPS FTP |
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-関連構造データ
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: タンパク質 | 分子量: 216398.344 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) Escherichia coli K-12 (大腸菌), (組換発現) Homo sapiens (ヒト) 株: K-12 / 遺伝子: malE, b4034, JW3994, PAPPA / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P0AEX9, UniProt: Q13219, pappalysin-1 #2: タンパク質 | 分子量: 33298.688 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: O76061 #3: 化合物 | 研究の焦点であるリガンドがあるか | N | Has 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 |
-試料調製
構成要素 | 名称: Structure of 2:2 PAPP-A/STC2 complex / タイプ: COMPLEX / Entity ID: #1-#2 / 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 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 凍結剤: ETHANE |
-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 / 最大 デフォーカス(公称値): 1200 nm / 最小 デフォーカス(公称値): 700 nm |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 電子線照射量: 59.8 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.19.1_4122: / 分類: 精密化 | ||||||||||||||||||||||||||||
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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||
対称性 | 点対称性: C2 (2回回転対称) | ||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.16 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 253671 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||
拘束条件 |
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