+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-11836 | |||||||||||||||
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タイトル | Cryo-EM density map corresponding to BcsRQAB subcomplex | |||||||||||||||
マップデータ | ||||||||||||||||
試料 |
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機能・相同性 | 機能・相同性情報 | |||||||||||||||
生物種 | Escherichia coli (大腸菌) | |||||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 4.5 Å | |||||||||||||||
データ登録者 | Zouhir S | |||||||||||||||
資金援助 | フランス, 4件
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引用 | ジャーナル: Sci Adv / 年: 2021 タイトル: Architecture and regulation of an enterobacterial cellulose secretion system. 著者: Wiem Abidi / Samira Zouhir / Meryem Caleechurn / Stéphane Roche / Petya Violinova Krasteva / 要旨: Many free-living and pathogenic enterobacteria secrete biofilm-promoting cellulose using a multicomponent, envelope-embedded Bcs secretion system under the control of intracellular second messenger c- ...Many free-living and pathogenic enterobacteria secrete biofilm-promoting cellulose using a multicomponent, envelope-embedded Bcs secretion system under the control of intracellular second messenger c-di-GMP. The molecular understanding of system assembly and cellulose secretion has been largely limited to the crystallographic studies of a distantly homologous BcsAB synthase tandem and a low-resolution reconstruction of an assembled macrocomplex that encompasses most of the inner membrane and cytosolic subunits and features an atypical layered architecture. Here, we present cryo-EM structures of the assembled Bcs macrocomplex, as well as multiple crystallographic snapshots of regulatory Bcs subcomplexes. The structural and functional data uncover the mechanism of asymmetric secretion system assembly and periplasmic crown polymerization and reveal unexpected subunit stoichiometry, multisite c-di-GMP recognition, and ATP-dependent regulation. | |||||||||||||||
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_11836.map.gz | 239.2 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-11836-v30.xml emd-11836.xml | 29.2 KB 29.2 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_11836.png | 45.4 KB | ||
その他 | emd_11836_additional_1.map.gz emd_11836_additional_2.map.gz emd_11836_additional_3.map.gz emd_11836_additional_4.map.gz | 126.5 MB 131.2 MB 131.4 MB 11.2 MB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-11836 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-11836 | 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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-マップ
ファイル | ダウンロード / ファイル: emd_11836.map.gz / 形式: CCP4 / 大きさ: 262.9 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: 1.05248 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
-追加マップ: #1
ファイル | emd_11836_additional_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-追加マップ: #3
ファイル | emd_11836_additional_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-追加マップ: #4
ファイル | emd_11836_additional_3.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-追加マップ: #2
ファイル | emd_11836_additional_4.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 : Cryo-EM density map corresponding to BcsR2Q2AB subcomplex obtaine...
全体 | 名称: Cryo-EM density map corresponding to BcsR2Q2AB subcomplex obtained after local refinement within the assembled Bcs macrocomplex(BcsRQABEF-BcsMacrocomplex.mrc). |
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要素 |
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-超分子 #1: Cryo-EM density map corresponding to BcsR2Q2AB subcomplex obtaine...
超分子 | 名称: Cryo-EM density map corresponding to BcsR2Q2AB subcomplex obtained after local refinement within the assembled Bcs macrocomplex(BcsRQABEF-BcsMacrocomplex.mrc). タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all 詳細: Bcs macrocomplex was purified using recombinant co-expression of constructs pRSFDuet1-Bcs(Strep)E-F-G and pCDFDuet1-Bcs(His)R-Q-A(HA-FLAG)-B and affinity pull-down using an anti-FLAG M2 resin ...詳細: Bcs macrocomplex was purified using recombinant co-expression of constructs pRSFDuet1-Bcs(Strep)E-F-G and pCDFDuet1-Bcs(His)R-Q-A(HA-FLAG)-B and affinity pull-down using an anti-FLAG M2 resin (Sigma). The proposed stoichiometry for the resultant assembly is BcsR2-Q2-E2-F2-A-B(5-6). Densities corresponding to a BcsR2Q2AB subcomplex were improved after particle subtraction and local refinement in cryoSPARC V2. BcsE and BcsF partake in the assembled Bcs macrocomplex, BcsG does not co-purify stably with the macrocomplex. |
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由来(天然) | 生物種: Escherichia coli (大腸菌) / 株: 1094 / 細胞中の位置: Inner membrane |
組換発現 | 生物種: Escherichia coli BL21(DE3) (大腸菌) 組換プラスミド: pRSFDuet1-Bcs(Strep)EFG and pCDFDuet1-Bcs(His)RQA(HA-FLAG)B |
分子量 | 理論値: 257 KDa |
-分子 #1: Bacterial cellulose synthase regulator protein BcsB
分子 | 名称: Bacterial cellulose synthase regulator protein BcsB / タイプ: protein_or_peptide / ID: 1 詳細: Genome-encoded BcsB harbors a signal sequence to be addressed to the periplam where according to the ServerP4.1 server prediction would result in a mature form starting with the residue #26 ...詳細: Genome-encoded BcsB harbors a signal sequence to be addressed to the periplam where according to the ServerP4.1 server prediction would result in a mature form starting with the residue #26 TPATQ BcsB sequence was cloned in a pCDFDuet1 vector along Bcs(His)R, BcsQ and BcsA(HA-FLAG). 1 copy in locally refined BcsR2Q2AB map, up to 6 copies in the assembled Bcs macrocomplex. 光学異性体: LEVO |
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由来(天然) | 生物種: Escherichia coli (大腸菌) / 株: 1094 |
組換発現 | 生物種: Escherichia coli BL21(DE3) (大腸菌) |
配列 | 文字列: TPATQPLINA EPAVAAQTEQ NPQVGQVMPG VQGAD APVV AQNGPSRDVK LTFAQIAPPP GSMVLRGINP NGSIEFGMRS DEVVTKAMLN LEYTPS PSL LPVQSQLKVY LNDELMGVLP VTKEQLGKKT LAQMPINPLF ITDFNRVRLE FVGHYQD VC ENPASTTLWL ...文字列: TPATQPLINA EPAVAAQTEQ NPQVGQVMPG VQGAD APVV AQNGPSRDVK LTFAQIAPPP GSMVLRGINP NGSIEFGMRS DEVVTKAMLN LEYTPS PSL LPVQSQLKVY LNDELMGVLP VTKEQLGKKT LAQMPINPLF ITDFNRVRLE FVGHYQD VC ENPASTTLWL DVGRSSGLDL TYQTLNVKND LSHFPVPFFD PRDNRTNTLP MVFAGAPD V GLQQASAIVA SWFGSRSGWR GQNFPVLYNQ LPDRNAIVFA TNDKRPDFLR DHPAVKAPV IEMINHPQNP YVKLLVVFGR DDKDLLQAAK GIAQGNILFR GESVVVNEVK PLLPRKPYDA PNWVRTDRP VTFGELKTYE EQLQSSGLEP AAINVSLNLP PDLYLMRSTG IDMDINYRYT M PPVKDSSR MDISLNNQFL QSFNLSSKQE ANRLLLRIPV LQGLLDGKTD VSIPALKLGA TN QLRFDFE YMNPMPGGSV DNCITFQPVQ NHVVIGDDST IDFSKYYHFI PMPDLRAFAN AGF PFSRMA DLSQTITVMP KAPNEAQMET LLNTVGFIGA QTGFPAINLT VTDDGSTIQG KDAD IMIIG GIPDKLKDDK QIDLLVQATE SWVKTPMRQT PFPGIVPDES DRAAETRSTL TSSGA MAAV IGFQSPYNDQ RSVIALLADS PRGYEMLNDA VNDSGKRATM FGSVAVIRES GINSLR VGD VYYVGHLPWF ERLWYALANH PILLAVLAAI SVILLAWVLW RLLRIISRRR LNPDNE |
-分子 #2: Bacterial cellulose synthase protein BcsA
分子 | 名称: Bacterial cellulose synthase protein BcsA / タイプ: protein_or_peptide / ID: 2 詳細: BcsA sequence was cloned in pCDFDuet1 vector along with Bcs(His)R, BcsQ and BcsB. BcsA harbours a C-terminus HA-Flag Tag. 1 copy in both the locally refined BcsR2Q2AB complex and the assembled Bcs macrocomplex. 光学異性体: LEVO |
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由来(天然) | 生物種: Escherichia coli (大腸菌) / 株: 1094 |
組換発現 | 生物種: Escherichia coli BL21(DE3) (大腸菌) |
配列 | 文字列: MSILTRWLLI PPVNARLIGR YRDYRRHGAS AFSATLGCFW MILAWIFIPL EHPRWQRIRA EHKNLYPHIN ASRPRPLDPV RYLIQTCWLL IGASRKETPK PRRRAFSGLQ NIRGRYHQWM NELPERVSHK TQHLDEKKEL GHLSAGARRL ILGIIVTFSL ILALICVTQP ...文字列: MSILTRWLLI PPVNARLIGR YRDYRRHGAS AFSATLGCFW MILAWIFIPL EHPRWQRIRA EHKNLYPHIN ASRPRPLDPV RYLIQTCWLL IGASRKETPK PRRRAFSGLQ NIRGRYHQWM NELPERVSHK TQHLDEKKEL GHLSAGARRL ILGIIVTFSL ILALICVTQP FNPLAQFIFL MLLWGVALIV RRMPGRFSAL MLIVLSLTVS CRYIWWRYTS TLNWDDPVSL VCGLILLFAE TYAWIVLVLG YFQVVWPLNR QPVPLPKDMS LWPSVDIFVP TYNEDLNVVK NTIYASLGID WPKDKLNIWI LDDGGREEFR QFAQNVGVKY IARTTHEHAK AGNINNALKY AKGEFVSIFD CDHVPTRSFL QMTMGWFLKE KQLAMMQTPH HFFSPDPFER NLGRFRKTPN EGTLFYGLVQ DGNDMWDATF FCGSCAVIRR KPLDEIGGIA VETVTEDAHT SLRLHRRGYT SAYMRIPQAA GLATESLSAH IGQRIRWARG MVQIFRLDNP LTGKGLKFAQ RLCYVNAMFH FLSGIPRLIF LTAPLAFLLL HAYIIYAPAL MIALFVLPHM IHASLTNSKI QGKYRHSFWS EIYETVLAWY IAPPTLVALI NPHKGKFNVT AKGGLVEEEY VDWVISRPYI FLVLLNLVGV AVGIWRYFYG PPTEMLTVVV SMVWVFYNLI VLGGAVAVSV ESKQVRRSHR VEMTMPAAIA REDGHLFSCT VQDFSDGGLG IKINGQAQIL EGQKVNLLLK RGQQEYVFPT QVARVMGNEV GLKLMPLTTQ QHIDFVQCTF ARADTWALWQ DSYPEDKPLE SLLDILKLGF RGYRHLAEFA PSSVKGIFRV LTSLVSWVVS FIPRRPERSE TAQPSDQALA QQGSARSSGR TGLEFEEFYP YDVPDYAADY KDDDDKRS |
-分子 #3: Bacterial cellulose synthase regulator protein BcsR
分子 | 名称: Bacterial cellulose synthase regulator protein BcsR / タイプ: protein_or_peptide / ID: 3 詳細: BcsR sequence was cloned in pCDFDuet1 vector along with BcsQ, BcsA(HA-FLAG) and BcsB. BcsR harbours a N-terminal octahistidine tag (N-His8). Likely two copies in the assembled secretion ...詳細: BcsR sequence was cloned in pCDFDuet1 vector along with BcsQ, BcsA(HA-FLAG) and BcsB. BcsR harbours a N-terminal octahistidine tag (N-His8). Likely two copies in the assembled secretion complexes, however the local resolution does not allow backbone tracing. High-resolution structures solved by X-ray crystallography. 光学異性体: LEVO |
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由来(天然) | 生物種: Escherichia coli (大腸菌) / 株: 1094 |
組換発現 | 生物種: Escherichia coli BL21(DE3) (大腸菌) |
配列 | 文字列: MGSSHHHHHH HHAAGSMNNN EPDTLPDPAI GYIFQNDIVA LKQAFSLPDI DYADISQREQ LAAALKRWPL LAEFAQQK |
-分子 #4: Bacterial cellulose synthase regulator protein BcsQ
分子 | 名称: Bacterial cellulose synthase regulator protein BcsQ / タイプ: protein_or_peptide / ID: 4 詳細: BcsQ sequence was cloned in pCDFDuet1 vector along with Bcs(His)R, BcsA(HA-FLAG) and BcsB 光学異性体: LEVO |
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由来(天然) | 生物種: Escherichia coli (大腸菌) / 株: 1094 |
組換発現 | 生物種: Escherichia coli BL21(DE3) (大腸菌) |
配列 | 文字列: MAVLGLQGVR GGVGTTTITA ALAWSLQMLG ENVLVVDACP DNLLRLSFNV DFTHRQGWAR AMLDGQDWRD AGLRYTSQLD LLPFGQLSIE EQENPQHWQT RLSDICSGLQ QLKASGRYQW ILIDLPRDAS QITHQLLSLC DHSLAIVNVD ANCHIRLHQQ ALPDGAHILI ...文字列: MAVLGLQGVR GGVGTTTITA ALAWSLQMLG ENVLVVDACP DNLLRLSFNV DFTHRQGWAR AMLDGQDWRD AGLRYTSQLD LLPFGQLSIE EQENPQHWQT RLSDICSGLQ QLKASGRYQW ILIDLPRDAS QITHQLLSLC DHSLAIVNVD ANCHIRLHQQ ALPDGAHILI NNFRIGSQVQ DDIYQLWLQS QRRLLPMLIH RDEAMAECLA AKQPVGEYRS DALAAEEILT LANWCLLNYS GLKTPVGSKS |
-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 | 0.8 mg/mL | ||||||||||||||
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緩衝液 | pH: 8 構成要素:
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グリッド | モデル: Quantifoil R1.2/1.3 / 材質: GOLD / 前処理 - タイプ: GLOW DISCHARGE / 詳細: Elmo Glow Discharge system | ||||||||||||||
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | C2レンズ絞り径: 100.0 µm / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / 最大 デフォーカス(公称値): 2.75 µm / 最小 デフォーカス(公称値): 0.75 µm / 倍率(公称値): 130000 |
特殊光学系 | エネルギーフィルター - 名称: GIF Quantum LS |
撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: COUNTING / 平均電子線量: 1.2 e/Å2 |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
-画像解析
粒子像選択 | 詳細: Particle picking using cryoSPARC's template picker and 2D classes generated from an initial dataset collected on the Elsa the Talos Arctica at the IECB Bordeaux. |
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CTF補正 | ソフトウェア - 名称: Gctf / 詳細: Gctf through the cryoSPARC v2 interface |
初期モデル | モデルのタイプ: INSILICO MODEL In silico モデル: Ab initio model generation in cryosparc V2 |
初期 角度割当 | タイプ: MAXIMUM LIKELIHOOD / ソフトウェア - 名称: cryoSPARC (ver. v2) 詳細: All 2D classification, particle curation, ab initio model generation, particle subtraction and local refinement were performed in cryosparc v2 |
最終 3次元分類 | ソフトウェア - 名称: cryoSPARC (ver. v2) / 詳細: 3D variability analysis |
最終 角度割当 | タイプ: MAXIMUM LIKELIHOOD / ソフトウェア - 名称: cryoSPARC (ver. v2) |
最終 再構成 | 想定した対称性 - 点群: C1 (非対称) / 解像度のタイプ: BY AUTHOR / 解像度: 4.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: cryoSPARC (ver. 2) 詳細: Two rounds of local refinement of the BcsR2Q2AB assembly were performed using different fulcrum placements. The resulting maps gave FSC values of ~3.9 and 4.1A, respectively, as determined by ...詳細: Two rounds of local refinement of the BcsR2Q2AB assembly were performed using different fulcrum placements. The resulting maps gave FSC values of ~3.9 and 4.1A, respectively, as determined by cryoSPARC using the 0.143 cut-off. The unsharpened maps were combined and conservatively sharpened to 4.5 A resolution. The sharpened map was used for building the C-terminal tail-anchor of BcsB and flexible fitting of a Robetta-derived homology model of BcsA. A BcsR2Q2 dimer solved by X-ray crystallography was rigid-body fitted in the apical density. 使用した粒子像数: 173294 |
詳細 | Data collection at the CM01 line in ESRF Grenoble (Titan Krion, GATAN K2 Summit DED and Quantum LS Imaging filter). |