+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7a08 | ||||||
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タイトル | CryoEM Structure of cGAS Nucleosome complex | ||||||
要素 |
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キーワード | TRANSFERASE / complex / immune protein / nuclear protein | ||||||
機能・相同性 | 機能・相同性情報 2',3'-cyclic GMP-AMP synthase activity / cyclic GMP-AMP synthase / negative regulation of chromosome condensation / paracrine signaling / poly-ADP-D-ribose modification-dependent protein binding / Barr body / regulation of centromere complex assembly / regulation of type I interferon production / regulation of immunoglobulin production / muscle cell differentiation ...2',3'-cyclic GMP-AMP synthase activity / cyclic GMP-AMP synthase / negative regulation of chromosome condensation / paracrine signaling / poly-ADP-D-ribose modification-dependent protein binding / Barr body / regulation of centromere complex assembly / regulation of type I interferon production / regulation of immunoglobulin production / muscle cell differentiation / cGAS/STING signaling pathway / pericentric heterochromatin formation / inner kinetochore / regulation of T cell activation / negative regulation of cGAS/STING signaling pathway / negative regulation of DNA repair / oocyte maturation / cGMP-mediated signaling / cellular response to exogenous dsRNA / nucleus organization / positive regulation of type I interferon production / nucleosome binding / regulation of immune response / spermatid development / negative regulation of double-strand break repair via homologous recombination / subtelomeric heterochromatin formation / single fertilization / negative regulation of megakaryocyte differentiation / RNA polymerase II core promoter sequence-specific DNA binding / protein localization to CENP-A containing chromatin / positive regulation of defense response to virus by host / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / Packaging Of Telomere Ends / activation of innate immune response / phosphatidylinositol-4,5-bisphosphate binding / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / nucleosomal DNA binding / cAMP-mediated signaling / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / Inhibition of DNA recombination at telomere / telomere organization / embryo implantation / Meiotic synapsis / RNA Polymerase I Promoter Opening / Assembly of the ORC complex at the origin of replication / SUMOylation of chromatin organization proteins / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / DNA methylation / Condensation of Prophase Chromosomes / SIRT1 negatively regulates rRNA expression / Chromatin modifications during the maternal to zygotic transition (MZT) / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / HCMV Late Events / innate immune response in mucosa / PRC2 methylates histones and DNA / determination of adult lifespan / Regulation of endogenous retroelements by KRAB-ZFP proteins / Defective pyroptosis / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / HDACs deacetylate histones / Nonhomologous End-Joining (NHEJ) / RNA Polymerase I Promoter Escape / molecular condensate scaffold activity / Transcriptional regulation by small RNAs / Formation of the beta-catenin:TCF transactivating complex / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / NoRC negatively regulates rRNA expression / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / G2/M DNA damage checkpoint / HDMs demethylate histones / B-WICH complex positively regulates rRNA expression / multicellular organism growth / DNA Damage/Telomere Stress Induced Senescence / heterochromatin formation / PKMTs methylate histone lysines / Metalloprotease DUBs / Meiotic recombination / Pre-NOTCH Transcription and Translation / RMTs methylate histone arginines / Activation of anterior HOX genes in hindbrain development during early embryogenesis / HCMV Early Events / positive regulation of cellular senescence / Transcriptional regulation of granulopoiesis / osteoblast differentiation / male gonad development / structural constituent of chromatin / UCH proteinases / antimicrobial humoral immune response mediated by antimicrobial peptide / nucleosome / nucleosome assembly / E3 ubiquitin ligases ubiquitinate target proteins / antibacterial humoral response / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / chromatin organization / site of double-strand break / RUNX1 regulates transcription of genes involved in differentiation of HSCs 類似検索 - 分子機能 | ||||||
生物種 | Mus musculus (ハツカネズミ) Homo sapiens (ヒト) synthetic construct (人工物) | ||||||
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: 3.11 Å | ||||||
データ登録者 | Michalski, S. / de Oliveira Mann, C.C. / Witte, G. / Bartho, J. / Lammens, K. / Hopfner, K.P. | ||||||
資金援助 | ドイツ, 1件
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引用 | ジャーナル: Nature / 年: 2020 タイトル: Structural basis for sequestration and autoinhibition of cGAS by chromatin. 著者: Sebastian Michalski / Carina C de Oliveira Mann / Che A Stafford / Gregor Witte / Joseph Bartho / Katja Lammens / Veit Hornung / Karl-Peter Hopfner / 要旨: Cyclic GMP-AMP synthase (cGAS) is an innate immune sensor for cytosolic microbial DNA. After binding DNA, cGAS synthesizes the messenger 2'3'-cyclic GMP-AMP (cGAMP), which triggers cell-autonomous ...Cyclic GMP-AMP synthase (cGAS) is an innate immune sensor for cytosolic microbial DNA. After binding DNA, cGAS synthesizes the messenger 2'3'-cyclic GMP-AMP (cGAMP), which triggers cell-autonomous defence and the production of type I interferons and pro-inflammatory cytokines via the activation of STING. In addition to responding to cytosolic microbial DNA, cGAS also recognizes mislocalized cytosolic self-DNA and has been implicated in autoimmunity and sterile inflammation. Specificity towards pathogen- or damage-associated DNA was thought to be caused by cytosolic confinement. However, recent findings place cGAS robustly in the nucleus, where tight tethering of chromatin is important to prevent autoreactivity to self-DNA. Here we show how cGAS is sequestered and inhibited by chromatin. We provide a cryo-electron microscopy structure of the cGAS catalytic domain bound to a nucleosome, which shows that cGAS does not interact with the nucleosomal DNA, but instead interacts with histone 2A-histone 2B, and is tightly anchored to the 'acidic patch'. The interaction buries the cGAS DNA-binding site B, and blocks the formation of active cGAS dimers. The acidic patch robustly outcompetes agonistic DNA for binding to cGAS, which suggests that nucleosome sequestration can efficiently inhibit cGAS, even when accessible DNA is nearby, such as in actively transcribed genomic regions. Our results show how nuclear cGAS is sequestered by chromatin and provides a mechanism for preventing autoreactivity to nuclear self-DNA. | ||||||
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 | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7a08.cif.gz | 331.4 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7a08.ent.gz | 248.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7a08.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 | 7a08_validation.pdf.gz | 825.7 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7a08_full_validation.pdf.gz | 826.2 KB | 表示 | |
XML形式データ | 7a08_validation.xml.gz | 38.1 KB | 表示 | |
CIF形式データ | 7a08_validation.cif.gz | 61.4 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/a0/7a08 ftp://data.pdbj.org/pub/pdb/validation_reports/a0/7a08 | HTTPS FTP |
-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
-タンパク質 , 5種, 9分子 abfcgdhei
#1: タンパク質 | 分子量: 43401.180 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Mus musculus (ハツカネズミ) / 遺伝子: Mb21d1 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: Q8C6L5, cyclic GMP-AMP synthase | ||||||
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#4: タンパク質 | 分子量: 14004.329 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: H2AC6, H2AFL, HIST1H2AC / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: Q93077 #5: タンパク質 | 分子量: 13806.018 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) 遺伝子: HIST1H2BC, H2BFL, HIST1H2BE, H2BFH, HIST1H2BF, H2BFG, HIST1H2BG, H2BFA, HIST1H2BI, H2BFK 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P62807 #6: タンパク質 | 分子量: 15229.787 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) 遺伝子: H3-3A, H3.3A, H3F3, H3F3A, PP781, H3-3B, H3.3B, H3F3B 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P84243 #7: タンパク質 | 分子量: 11263.231 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) 遺伝子: HIST1H4A, H4/A, H4FA, HIST1H4B, H4/I, H4FI, HIST1H4C, H4/G, H4FG, HIST1H4D, H4/B, H4FB, HIST1H4E, H4/J, H4FJ, HIST1H4F, H4/C, H4FC, HIST1H4H, H4/H, H4FH, HIST1H4I, H4/M, H4FM, HIST1H4J, ...遺伝子: HIST1H4A, H4/A, H4FA, HIST1H4B, H4/I, H4FI, HIST1H4C, H4/G, H4FG, HIST1H4D, H4/B, H4FB, HIST1H4E, H4/J, H4FJ, HIST1H4F, H4/C, H4FC, HIST1H4H, H4/H, H4FH, HIST1H4I, H4/M, H4FM, HIST1H4J, H4/E, H4FE, HIST1H4K, H4/D, H4FD, HIST1H4L, H4/K, H4FK, HIST2H4A, H4/N, H4F2, H4FN, HIST2H4, HIST2H4B, H4/O, H4FO, HIST4H4 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P62805 |
-Nucleosomal DNA strand ... , 2種, 2分子 IJ
#2: DNA鎖 | 分子量: 45145.754 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) |
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#3: DNA鎖 | 分子量: 45604.047 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) |
-非ポリマー , 1種, 1分子
#8: 化合物 | ChemComp-ZN / |
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-詳細
研究の焦点であるリガンドがあるか | N |
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Has protein modification | 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 |
-試料調製
構成要素 |
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分子量 |
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由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 7.5 | ||||||||||||||||||||||||||||||
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: Quantifoil | ||||||||||||||||||||||||||||||
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 |
撮影 | 電子線照射量: 44.8 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.18.2_3874: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.11 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 172977 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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