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- EMDB-22077: Cryo-EM Structure of CagX and CagY within the dCag3 Helicobacter ... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-22077 | ||||||||||||||||||||||||
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Title | Cryo-EM Structure of CagX and CagY within the dCag3 Helicobacter pylori PR | ||||||||||||||||||||||||
![]() | Helicobacter pylori T4SS dCag3 PR | ||||||||||||||||||||||||
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Function / homology | ![]() | ||||||||||||||||||||||||
Biological species | ![]() ![]() ![]() | ||||||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.0 Å | ||||||||||||||||||||||||
![]() | Sheedlo MJ / Chung JM / Sawhney N / Durie CL / Cover TL / Ohi MD / Lacy DB | ||||||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM reveals species-specific components within the Cag type IV secretion system core complex. Authors: Michael J Sheedlo / Jeong Min Chung / Neha Sawhney / Clarissa L Durie / Timothy L Cover / Melanie D Ohi / D Borden Lacy / ![]() Abstract: The pathogenesis of -associated gastric cancer is dependent on delivery of CagA into host cells through a type IV secretion system (T4SS). The Cag T4SS includes a large membrane-spanning core ...The pathogenesis of -associated gastric cancer is dependent on delivery of CagA into host cells through a type IV secretion system (T4SS). The Cag T4SS includes a large membrane-spanning core complex containing five proteins, organized into an outer membrane cap (OMC), a periplasmic ring (PR) and a stalk. Here, we report cryo-EM reconstructions of a core complex lacking Cag3 and an improved map of the wild-type complex. We define the structures of two unique species-specific components (Cag3 and CagM) and show that Cag3 is structurally similar to CagT. Unexpectedly, components of the OMC are organized in a 1:1:2:2:5 molar ratio (CagY:CagX:CagT:CagM:Cag3). CagX and CagY are components of both the OMC and the PR and bridge the symmetry mismatch between these regions. These results reveal that assembly of the T4SS core complex is dependent on incorporation of interwoven species-specific components. | ||||||||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 473.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 13.6 KB 13.6 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 18 KB | Display | ![]() |
Images | ![]() | 100.3 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6x6lMC ![]() 6x6jC ![]() 6x6kC ![]() 6x6sC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Map
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Annotation | Helicobacter pylori T4SS dCag3 PR | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Helicobacter pylori dCag3 Cag T4SS PR
Entire | Name: Helicobacter pylori dCag3 Cag T4SS PR |
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Components |
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-Supramolecule #1: Helicobacter pylori dCag3 Cag T4SS PR
Supramolecule | Name: Helicobacter pylori dCag3 Cag T4SS PR / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: Cag pathogenicity island protein (Cag8)
Macromolecule | Name: Cag pathogenicity island protein (Cag8) / type: protein_or_peptide / ID: 1 / Number of copies: 17 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() Strain: ATCC 700392 / 26695 |
Molecular weight | Theoretical: 60.607324 KDa |
Sequence | String: MGQAFFKKIV GCFCLGYLFL SSAIEAAALD IKNFNRGRVK VVNKKIAYLG DEKPITIWTS LDNVTVIQLE KDETISYITT GFNKGWSIV PNSNHIFIQP KSVKSNLMFE KEAVNFALMT RDYQEFLKTK KLIVDAPDPK ELEEQKKALE KEKEAKEQAQ K AQKDKREK ...String: MGQAFFKKIV GCFCLGYLFL SSAIEAAALD IKNFNRGRVK VVNKKIAYLG DEKPITIWTS LDNVTVIQLE KDETISYITT GFNKGWSIV PNSNHIFIQP KSVKSNLMFE KEAVNFALMT RDYQEFLKTK KLIVDAPDPK ELEEQKKALE KEKEAKEQAQ K AQKDKREK RKEERAKNRA NLENLTNAMS NPQNLSNNKN LSEFIKQQRE NELDQMERLE DMQEQAQANA LKQIEELNKK QA EETIKQR AKDKINIKTD KPQKSPEDNS IELSPSDSAW RTNLVVRTNK ALYQFILRIA QKDNFASAYL TVKLEYPQRH EVS SVIEEL KKREEAKRQK ELIKQENLNT TAYINRVMMA SNEQIINKEK IREEKQKIIL DQAKALETQY VHNALKRNPV PRNY NYYQA PEKRSKHIMP SEIFDDGTFT YFGFKNITLQ PAIFVVQPDG KLSMTDAAID PNMTNSGLRW YRVNEIAEKF KLIKD KALV TVINKGYGKN PLTKNYNIKN YGELERVIKK LPEVRDK |
-Macromolecule #2: Cag pathogenicity island protein (Cag7)
Macromolecule | Name: Cag pathogenicity island protein (Cag7) / type: protein_or_peptide / ID: 2 / Number of copies: 17 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() Strain: ATCC 700392 / 26695 |
Molecular weight | Theoretical: 219.748641 KDa |
Sequence | String: MNEENDKLET SKKAQQDSPQ DLSNEEATEA NHFENLLKES KESSDHHLDN PTETQTHFDG DKSEETQTQM DSEGNETSES SNGSLADKL FKKARKLVDN KKPFTQQKNL DEETQELNEE DDQENNEYQE ETQTDLIDDE TSKKTQQHSP QDLSNEEATE A NHFENLLK ...String: MNEENDKLET SKKAQQDSPQ DLSNEEATEA NHFENLLKES KESSDHHLDN PTETQTHFDG DKSEETQTQM DSEGNETSES SNGSLADKL FKKARKLVDN KKPFTQQKNL DEETQELNEE DDQENNEYQE ETQTDLIDDE TSKKTQQHSP QDLSNEEATE A NHFENLLK ESKESSDHHL DNPTETQTNF DGDKSEETQT QMDSEGNETS ESSNGSLADK LFKKARKLVD NKKPFTQQKN LD EETQELN EEDDQENNEY QEETQTDLID DETSKKTQQH SPQDLSNEEA TEANHFENLL KESKESSDHH LDNPTETQTN FDG DKSEEI TDDSNDQEII KGSKKKYIIG GIVVAVLIVI ILFSRSIFHY FMPLEDKSSR FSKDRNLYVN DEIQIRQEYN RLLK ERNEK GNMIDKNLFF NDDPNRTLYN YLNIAEIEDK NPLRAFYECI SNGGNYEECL KLIKDKKLQD QMKKTLEAYN DCIKN AKTE EERIKCLDLI KDENLKKSLL NQQKVQVALD CLKNAKTDEE RNECLKLIND PEIREKFRKE LELQKELQEY KDCIKN AKT EAEKNKCLKG LSKEAIERLK QQALDCLKNA KTDEERNECL KNIPQDLQKE LLADMSVKAY KDCVSKARNE KEKQECE KL LTPEARKKLE QQVLDCLKNA KTDEERKKCL KDLPKDLQSD ILAKESLKAY KDCVSQAKTE AEKKECEKLL TPEAKKLL E EEAKESVKAY LDCVSQAKTE AEKKECEKLL TPEAKKKLEE AKKSVKAYLD CVSRARNEKE KKECEKLLTP EAKKLLEQQ ALDCLKNAKT DKERKKCLKD LPKDLQKKVL AKESVKAYLD CVSQAKTEAE KKECEKLLTP EARKLLEEAK KSVKAYLDCV SQAKTEAEK KECEKLLTPE ARKLLEE(UNK)AK ESVKAYLDCV SQAKNEAEKK ECEKLLTLES KKKLEEAKKS VKAYLDC VS QAKTEAEKKE CEKLLTPEAK KLLEQQALDC LKNAKTEADK KRCVKDLPKD LQKKVLAKES LKAYKDCVSK ARNEKEKK E CEKLLTPEAK KLLEEAKKSV KAYLDCVSQA KTEAEKKECE KLLTPEARKL LEEAKESVKA YKDCVSKARN EKEKKECEK LLTPEAKKLL EQQVLDCLKN AKTEADKKRC VKDLPKDLQK KVLAKESVKA YLDCVSRARN EKEKKECEKL LTPEAKKLLE EAKESLKAY KDCLSQARNE EERRACEKLL TPEARKLLEQ EVKKSIKAYL DCVSRARNEK EKKECEKLLT PEARKFLAKQ V LNCLEKAG NEEERKACLK NLPKDLQENI LAKESLKAYK DCLSQARNEE ERRACEKLLT PEARKLLEQE VKKSVKAYLD CV SRARNEK EKKECEKLLT PEARKFLAKE LQQKDKAIKD CLKNADPNDR AAIMKCLDGL SDEEKLKYLQ EAREKAVADC LAM AKTDEE KRKCQNLYSD LIQEIQNKRT QNKQNQLSKT ERLHQASECL DNLDDPTDQE AIEQCLEGLS DSERALILGI KRQA DEVDL IYSDLRNRKT FDNMAAKGYP LLPMDFKNGG DIATINATNV DADKIASDNP IYASIEPDIA KQYETEKTIK DKNLE AKLA KALGGNKKDD DKEKSKKSTA EAKAENNKID KDVAETAKNI SEIALKNKKE KSGEFVDENG NPIDDKKKAE KQDETS PVK QAFIGKSDPT FVLAQYTPIE ITLTSKVDAT LTGIVSGVVA KDVWNMNGTM ILLDKGTKVY GNYQSVKGGT PIMTRLM IV FTKAITPDGV IIPLANAQAA GMLGEAGVDG YVNNHFMKRI GFAVIASVVN SFLQTAPIIA LDKLIGLGKG RSERTPEF N YALGQAINGS MQSSAQMSNQ ILGQLMNIPP SFYKNEGDSI KILTMDDIDF SGVYDVKITN KSVVDEIIKQ STKTLSREH EEITTSPKGG N |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 59.7 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |