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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: 8okx | ||||||
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タイトル | Structure of cGAS in complex with SPSB3-ELOBC | ||||||
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![]() | IMMUNE SYSTEM / cGAS / degradation / UPS | ||||||
機能・相同性 | ![]() 2',3'-cyclic GMP-AMP synthase activity / cyclic GMP-AMP synthase / STING mediated induction of host immune responses / paracrine signaling / poly-ADP-D-ribose modification-dependent protein binding / target-directed miRNA degradation / VCB complex / elongin complex / regulation of immunoglobulin production / cGAS/STING signaling pathway ...2',3'-cyclic GMP-AMP synthase activity / cyclic GMP-AMP synthase / STING mediated induction of host immune responses / paracrine signaling / poly-ADP-D-ribose modification-dependent protein binding / target-directed miRNA degradation / VCB complex / elongin complex / regulation of immunoglobulin production / cGAS/STING signaling pathway / regulation of T cell activation / Cul5-RING ubiquitin ligase complex / pattern recognition receptor signaling pathway / cGMP-mediated signaling / SCF ubiquitin ligase complex / negative regulation of epithelial to mesenchymal transition / Cul2-RING ubiquitin ligase complex / cytoplasmic pattern recognition receptor signaling pathway / negative regulation of cGAS/STING signaling pathway / cellular response to exogenous dsRNA / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / positive regulation of type I interferon production / Tat-mediated elongation of the HIV-1 transcript / negative regulation of double-strand break repair via homologous recombination / ubiquitin-like ligase-substrate adaptor activity / Formation of HIV-1 elongation complex containing HIV-1 Tat / Formation of HIV elongation complex in the absence of HIV Tat / protein K48-linked ubiquitination / cAMP-mediated signaling / nucleosome binding / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / positive regulation of defense response to virus by host / phosphatidylinositol-4,5-bisphosphate binding / RNA Polymerase II Pre-transcription Events / activation of innate immune response / transcription corepressor binding / determination of adult lifespan / TP53 Regulates Transcription of DNA Repair Genes / transcription initiation at RNA polymerase II promoter / transcription elongation by RNA polymerase II / molecular condensate scaffold activity / Vif-mediated degradation of APOBEC3G / Inactivation of CSF3 (G-CSF) signaling / Evasion by RSV of host interferon responses / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / Regulation of expression of SLITs and ROBOs / positive regulation of cellular senescence / Antigen processing: Ubiquitination & Proteasome degradation / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / site of double-strand break / Neddylation / protein-containing complex assembly / double-stranded DNA binding / ubiquitin-dependent protein catabolic process / protein-macromolecule adaptor activity / defense response to virus / proteasome-mediated ubiquitin-dependent protein catabolic process / protein ubiquitination / nuclear body / innate immune response / DNA repair / ubiquitin protein ligase binding / DNA damage response / chromatin binding / regulation of transcription by RNA polymerase II / GTP binding / protein homodimerization activity / DNA binding / nucleoplasm / ATP binding / metal ion binding / nucleus / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
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: 3.51 Å | ||||||
![]() | Xu, P.B. / Ablasser, A. | ||||||
資金援助 | European Union, 1件
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![]() | ![]() タイトル: The CRL5-SPSB3 ubiquitin ligase targets nuclear cGAS for degradation. 著者: Pengbiao Xu / Ying Liu / Chong Liu / Baptiste Guey / Lingyun Li / Pauline Melenec / Jonathan Ricci / Andrea Ablasser / ![]() ![]() 要旨: Cyclic GMP-AMP synthase (cGAS) senses aberrant DNA during infection, cancer and inflammatory disease, and initiates potent innate immune responses through the synthesis of 2'3'-cyclic GMP-AMP (cGAMP). ...Cyclic GMP-AMP synthase (cGAS) senses aberrant DNA during infection, cancer and inflammatory disease, and initiates potent innate immune responses through the synthesis of 2'3'-cyclic GMP-AMP (cGAMP). The indiscriminate activity of cGAS towards DNA demands tight regulatory mechanisms that are necessary to maintain cell and tissue homeostasis under normal conditions. Inside the cell nucleus, anchoring to nucleosomes and competition with chromatin architectural proteins jointly prohibit cGAS activation by genomic DNA. However, the fate of nuclear cGAS and its role in cell physiology remains unclear. Here we show that the ubiquitin proteasomal system (UPS) degrades nuclear cGAS in cycling cells. We identify SPSB3 as the cGAS-targeting substrate receptor that associates with the cullin-RING ubiquitin ligase 5 (CRL5) complex to ligate ubiquitin onto nuclear cGAS. A cryo-electron microscopy structure of nucleosome-bound cGAS in a complex with SPSB3 reveals a highly conserved Asn-Asn (NN) minimal degron motif at the C terminus of cGAS that directs SPSB3 recruitment, ubiquitylation and cGAS protein stability. Interference with SPSB3-regulated nuclear cGAS degradation primes cells for type I interferon signalling, conferring heightened protection against infection by DNA viruses. Our research defines protein degradation as a determinant of cGAS regulation in the nucleus and provides structural insights into an element of cGAS that is amenable to therapeutic exploitation. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 179.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 132.7 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 16933MC ![]() 8ol1C M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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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: タンパク質 | 分子量: 42714.145 Da / 分子数: 1 / 変異: K285A R300A K428A / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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#2: タンパク質 | 分子量: 27415.240 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
#3: タンパク質 | 分子量: 12485.135 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
#4: タンパク質 | 分子量: 13147.781 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
#5: 化合物 | ChemComp-ZN / |
研究の焦点であるリガンドがあるか | Y |
-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: cGAS-Spsb3-EloBC complex / タイプ: COMPLEX / Entity ID: #1-#4 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.4 / 詳細: PBS buffer |
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: COPPER / グリッドのタイプ: C-flat-2/2 |
急速凍結 | 凍結剤: ETHANE |
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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: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 600 nm |
撮影 | 電子線照射量: 40 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
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解析
ソフトウェア | 名称: PHENIX / バージョン: 1.20rc2_4400: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.51 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 592494 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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