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基本情報
登録情報 | データベース: EMDB / ID: EMD-10313 | |||||||||
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タイトル | Structure of Photorhabdus luminescens Tc holotoxin pore | |||||||||
![]() | Half map 1 | |||||||||
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![]() | Complex / Holotoxin / Photorhabdus / Insecticidal / Translocation / TOXIN | |||||||||
機能・相同性 | ![]() | |||||||||
生物種 | ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.4 Å | |||||||||
![]() | Roderer D / Raunser S | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure of a Tc holotoxin pore provides insights into the translocation mechanism. 著者: Daniel Roderer / Oliver Hofnagel / Roland Benz / Stefan Raunser / ![]() 要旨: Tc toxins are modular toxin systems of insect and human pathogenic bacteria. They are composed of a 1.4-MDa pentameric membrane translocator (TcA) and a 250-kDa cocoon (TcB and TcC) encapsulating the ...Tc toxins are modular toxin systems of insect and human pathogenic bacteria. They are composed of a 1.4-MDa pentameric membrane translocator (TcA) and a 250-kDa cocoon (TcB and TcC) encapsulating the 30-kDa toxic enzyme (C terminus of TcC). Binding of Tc toxins to target cells and a pH shift trigger the conformational transition from the soluble prepore state to the membrane-embedded pore. Subsequently, the toxic enzyme is translocated and released into the cytoplasm. A high-resolution structure of a holotoxin embedded in membranes is missing, leaving open the question of whether TcB-TcC has an influence on the conformational transition of TcA. Here we show in atomic detail a fully assembled 1.7-MDa Tc holotoxin complex from in the membrane. We find that the 5 TcA protomers conformationally adapt to fit around the cocoon during the prepore-to-pore transition. The architecture of the Tc toxin complex allows TcB-TcC to bind to an already membrane-embedded TcA pore to form a holotoxin. Importantly, assembly of the holotoxin at the membrane results in spontaneous translocation of the toxic enzyme, indicating that this process is not driven by a proton gradient or other energy source. Mammalian lipids with zwitterionic head groups are preferred over other lipids for the integration of Tc toxins. In a nontoxic Tc toxin variant, we can visualize part of the translocating toxic enzyme, which transiently interacts with alternating negative charges and hydrophobic stretches of the translocation channel, providing insights into the mechanism of action of Tc toxins. | |||||||||
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
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マップデータ | ![]() | 17.8 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 15.3 KB 15.3 KB | 表示 表示 | ![]() |
画像 | ![]() | 122.2 KB | ||
Filedesc metadata | ![]() | 8.3 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 233.5 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 232.6 KB | 表示 | |
XML形式データ | ![]() | 7.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Half map 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.05 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
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試料の構成要素
-全体 : Tc holotoxin complex in the pore form, formed by the TcdA1 pentam...
全体 | 名称: Tc holotoxin complex in the pore form, formed by the TcdA1 pentamer and TcdB2-TccC3 |
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要素 |
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-超分子 #1: Tc holotoxin complex in the pore form, formed by the TcdA1 pentam...
超分子 | 名称: Tc holotoxin complex in the pore form, formed by the TcdA1 pentamer and TcdB2-TccC3 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: ![]() |
分子量 | 理論値: 1.7 MDa |
-分子 #1: TcdA1
分子 | 名称: TcdA1 / タイプ: protein_or_peptide / ID: 1 / コピー数: 5 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 283.230375 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: MNESVKEIPD VLKSQCGFNC LTDISHSSFN EFRQQVSEHL SWSETHDLYH DAQQAQKDNR LYEARILKRA NPQLQNAVHL AILAPNAEL IGYNNQFSGR ASQYVAPGTV SSMFSPAAYL TELYREARNL HASDSVYYLD TRRPDLKSMA LSQQNMDIEL S TLSLSNEL ...文字列: MNESVKEIPD VLKSQCGFNC LTDISHSSFN EFRQQVSEHL SWSETHDLYH DAQQAQKDNR LYEARILKRA NPQLQNAVHL AILAPNAEL IGYNNQFSGR ASQYVAPGTV SSMFSPAAYL TELYREARNL HASDSVYYLD TRRPDLKSMA LSQQNMDIEL S TLSLSNEL LLESIKTESK LENYTKVMEM LSTFRPSGAT PYHDAYENVR EVIQLQDPGL EQLNASPAIA GLMHQASLLG IN ASISPEL FNILTEEITE GNAEELYKKN FGNIEPASLA MPEYLKRYYN LSDEELSQFI GKASNFGQQE YSNNQLITPV VNS SDGTVK VYRITREYTT NAYQMDVELF PFGGENYRLD YKFKNFYNAS YLSIKLNDKR ELVRTEGAPQ VNIEYSANIT LNTA DISQP FEIGLTRVLP SGSWAYAAAK FTVEEYNQYS FLLKLNKAIR LSRATELSPT ILEGIVRSVN LQLDINTDVL GKVFL TKYY MQRYAIHAET ALILCNAPIS QRSYDNQPSQ FDRLFNTPLL NGQYFSTGDE EIDLNSGSTG DWRKTILKRA FNIDDV SLF RLLKITDHDN KDGKIKNNLK NLSNLYIGKL LADIHQLTID ELDLLLIAVG EGKTNLSAIS DKQLATLIRK LNTITSW LH TQKWSVFQLF IMTSTSYNKT LTPEIKNLLD TVYHGLQGFD KDKADLLHVM APYIAATLQL SSENVAHSVL LWADKLQP G DGAMTAEKFW DWLNTKYTPG SSEAVETQEH IVQYCQALAQ LEMVYHSTGI NENAFRLFVT KPEMFGAATG AAPAHDALS LIMLTRFADW VNALGEKASS VLAAFEANSL TAEQLADAMN LDANLLLQAS IQAQNHQHLP PVTPENAFSC WTSINTILQW VNVAQQLNV APQGVSALVG LDYIESMKET PTYAQWENAA GVLTAGLNSQ QANTLHAFLD ESRSAALSTY YIRQVAKAAA A IKSRDDLY QYLLIDNQVS AAIKTTRIAE AIASIQLYVN RALENVEENA NSGVISRQFF IDWDKYNKRY STWAGVSQLV YY PENYIDP TMRIGQTKMM DALLQSVSQS QLNADTVEDA FMSYLTSFEQ VANLKVISAY HDNINNDQGL TYFIGLSETD AGE YYWRSV DHSKFNDGKF AANAWSEWHK IDCPINPYKS TIRPVIYKSR LYLLWLEQKE ITKQTGNSKD GYQTETDYRY ELKL AHIRY DGTWNTPITF DVNKKISELK LEKNRAPGLY CAGYQGEDTL LVMFYNQQDT LDSYKNASMQ GLYIFADMAS KDMTP EQSN VYRDNSYQQF DTNNVRRVNN RYAEDYEIPS SVSSRKDYGW GDYYLSMVYN GDIPTINYKA ASSDLKIYIS PKLRII HNG YEGQKRNQCN LMNKYGKLGD KFIVYTSLGV NPNNSSNKLM FYPVYQYSGN TSGLNQGRLL FHRDTTYPSK VEAWIPG AK RSLTNQNAAI GDDYATDSLN KPDDLKQYIF MTDSKGTATD VSGPVEINTA ISPAKVQIIV KAGGKEQTFT ADKDVSIQ P SPSFDEMNYQ FNALEIDGSG LNFINNSASI DVTFTAFAED GRKLGYESFS IPVTLKVSTD NALTLHHNEN GAQYMQWQS YRTRLNTLFA RQLVARATTG IDTILSMETQ NIQEPQLGKG FYATFVIPPY NLSTHGDERW FKLYIKHVVD NNSHIIYSGQ LTDTNINIT LFIPLDDVPL NQDYHAKVYM TFKKSPSDGT WWGPHFVRDD KGIVTINPKS ILTHFESVNV LNNISSEPMD F SGANSLYF WELFYYTPML VAQRLLHEQN FDEANRWLKY VWSPSGYIVH GQIQNYQWNV RPLLEDTSWN SDPLDSVDPD AV AQHDPMH YKVSTFMRTL DLLIARGDHA YRQLERDTLN EAKMWYMQAL HLLGDKPYLP LSTTWSDPRL DRAADITTQN AHD SAIVAL RQNIPTPAPL SLRSANTLTD LFLPQINEVM MNYWQTLAQR VYNLRHNLSI DGQPLYLPIY ATPADPKALL SAAV ATSQG GGKLPESFMS LWRFPHMLEN ARGMVSQLTQ FGSTLQNIIE RQDAEALNAL LQNQAAELIL TNLSIQDKTI EELDA EKTV LEKSKAGAQS RFDSYGKLYD ENINAGENQA MTLRASAAGL TTAVQASRLA GAAADLVPNI FGFAGGGSRW GAIAEA TGY VMEFSANVMN TEADKISQSE TYRRRRQEWE IQRNNAEAEL KQIDAQLKSL AVRREAAVLQ KTSLKTQQEQ TQSQLAF LQ RKFSNQALYN WLRGRLAAIY FQFYDLAVAR CLMAEQAYRW ELNDDSARFI KPGAWQGTYA GLLAGETLML SLAQMEDA H LKRDKRALEV ERTVSLAEVY AGLPKDNGPF SLAQEIDKLV SQGSGSAGSG NNNLAFGAGT DTKTSLQASV SFADLKIRE DYPASLGKIR RIKQISVTLP ALLGPYQDVQ AILSYGDKAG LANGCEALAV SHGMNDSGQF QLDFNDGKFL PFEGIAIDQG TLTLSFPNA SMPEKGKQAT MLKTLNDIIL HIRYTIK UniProtKB: TcdA1 |
-分子 #2: TcdB2,TccC3
分子 | 名称: TcdB2,TccC3 / 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: ![]() |
分子量 | 理論値: 274.18825 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: MQNSQDFSIT ELSLPKGGGA ITGMGEALTP TGPDGMAALS LPLPISAGRG YAPAFTLNYN SGAGNSPFGL GWDCNVMTIR RRTHFGVPH YDETDTFLGP EGEVLVVADQ PRDESTLQGI NLGATFTVTG YRSRLESHFS RLEYWQPKTT GKTDFWLIYS P DGQVHLLG ...文字列: MQNSQDFSIT ELSLPKGGGA ITGMGEALTP TGPDGMAALS LPLPISAGRG YAPAFTLNYN SGAGNSPFGL GWDCNVMTIR RRTHFGVPH YDETDTFLGP EGEVLVVADQ PRDESTLQGI NLGATFTVTG YRSRLESHFS RLEYWQPKTT GKTDFWLIYS P DGQVHLLG KSPQARISNP SQTTQTAQWL LEASVSSRGE QIYYQYRAED DTGCEADEIT HHLQATAQRY LHIVYYGNRT AS ETLPGLD GSAPSQADWL FYLVFDYGER SNNLKTPPAF STTGSWLCRQ DRFSRYEYGF EIRTRRLCRQ VLMYHHLQAL DSK ITEHNG PTLVSRLILN YDESAIASTL VFVRRVGHEQ DGNVVTLPPL ELAYQDFSPR HHAHWQPMDV LANFNAIQRW QLVD LKGEG LPGLLYQDKG AWWYRSAQRL GEIGSDAVTW EKMQPLSVIP SLQSNASLVD INGDGQLDWV ITGPGLRGYH SQRPD GSWT RFTPLNALPV EYTHPRAQLA DLMGAGLSDL VLIGPKSVRL YANTRDGFAK GKDVVQSGEI TLPVPGADPR KLVAFS DVL GSGQAHLVEV SATKVTCWPN LGRGRFGQPI TLPGFSQPAT EFNPAQVYLA DLDGSGPTDL IYVHTNRLDI FLNKSGN GF AEPVTLRFPE GLRFDHTCQL QMADVQGLGV ASLILSVPHM SPHHWRCDLT NMKPWLLNEM NNNMGVHHTL RYRSSSQF W LDEKAAALTT GQTPVCYLPF PIHTLWQTET EDEISGNKLV TTLRYARGAW DGREREFRGF GYVEQTDSHQ LAQGNAPER TPPALTKNWY ATGLPVIDNA LSTEYWRDDQ AFAGFSPRFT TWQDNKDVPL TPEDDNSRYW FNRALKGQLL RSELYGLDDS TNKHVPYTV TEFRSQVRRL QHTDSRYPVL WSSVVESRNY HYERIASDPQ CSQNITLSSD RFGQPLKQLS VQYPRRQQPA I NLYPDTLP DKLLANSYDD QQRQLRLTYQ QSSWHHLTNN TVRVLGLPDS TRSDIFTYGA ENVPAGGLNL ELLSDKNSLI AD DKPREYL GQQKTAYTDG QNTTPLQTPT RQALIAFTET TVFNQSTLSA FNGSIPSDKL STTLEQAGYQ QTNYLFPRTG EDK VWVAHH GYTDYGTAAQ FWRPQKQSNT QLTGKITLIW DANYCVVVQT RDAAGLTTSA KYDWRFLTPV QLTDINDNQH LITL DALGR PITLRFWGTE NGKMTGYSSP EKASFSPPSD VNAAIELKKP LPVAQCQVYA PESWMPVLSQ KTFNRLAEQD WQKLY NARI ITEDGRICTL AYRRWVQSQK AIPQLISLLN NGPRLPPHSL TLTTDRYDHD PEQQIRQQVV FSDGFGRLLQ AAARHE AGM ARQRNEDGSL IINVQHTENR WAVTGRTEYD NKGQPIRTYQ PYFLNDWRYV SNDSARQEKE AYADTHVYDP IGREIKV IT AKGWFRRTLF TPWFTVNEDE NDTAAEVKKV KMPGSRPMKN IDPKLYQKTP TVSVYDNRGL IIRNIDFHRT TANGDPDT R ITRHQYDIHG HLNQSIDPRL YEAKQTNNTI KPNFLWQYDL TGNPLCTESI DAGRTVTLND IEGRPLLTVT ATGVIQTRQ YETSSLPGRL LSVAEQTPEE KTSRITERLI WAGNTEAEKD HNLAGQCVRH YDTAGVTRLE SLSLTGTVLS QSSQLLIDTQ EANWTGDNE TVWQNMLADD IYTTLSTFDA TGALLTQTDA KGNIQRLAYD VAGQLNGSWL TLKGQTEQVI IKSLTYSAAG Q KLREEHGN DVITEYSYEP ETQRLIGIKT RRPSDTKVLQ DLRYEYDPVG NVISIRNDAE ATRFWHNQKV MPENTYTYDS LY QLISATG REMANIGQQS HQFPSPALPS DNNTYTNYTR TYTYDRGGNL TKIQHSSPAT QNNYTTNITV SNRSNRAVLS TLT EDPAQV DALFDAGGHQ NTLISGQNLN WNTRGELQQV TLVKRDKGAN DDREWYRYSG DGRRMLKINE QQASNNAQTQ RVTY LPNLE LRLTQNSTAT TEDLQVITVG EAGRAQVRVL HWESGKPEDI DNNQLRYSYD NLIGSSQLEL DSEGQIISEE EYYPY GGTA LWAARNQTEA SYKTIRYSGK ERDATGLYYY GYRYYQPWIG RWLSSDPAGT IDGLNLYRMV RNNPVTLLDP DGLMPT IAE RIAALKKNKV TDSAPSPANA TNVAINIRPP VAPKPSLPKA STSSQPTTHP IGAANIKPTT SGSSIVAPLS PVGNKST SE ISLPESAQSS SSSTTSTNLQ KKSFTLYRAD NRSFEEMQSK FPEGFKAWTP LDTKMARQFA SIFIGQKDTS NLPKETVK N ISTWGAKPKL KDLSNYIKYT KDKSTVWVST AINTEAGGQS SGAPLHKIDM DLYEFAIDGQ KLNPLPEGRT KNMVPSLLL DTPQIETSSI IALNHGPVND AEISFLTTIP LKNVKPHKR UniProtKB: TcdB2, TccC3 |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
濃度 | 0.1 mg/mL |
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緩衝液 | pH: 8 |
凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: SUPER-RESOLUTION / 平均電子線量: 60.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: SPOT SCAN / 撮影モード: BRIGHT FIELD |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
初期モデル | モデルのタイプ: EMDB MAP |
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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: 3.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: SPHIRE / 使用した粒子像数: 64806 |
初期 角度割当 | タイプ: NOT APPLICABLE |
最終 角度割当 | タイプ: NOT APPLICABLE |