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- EMDB-0610: Reconstruction of CDTb Double Heptamer Short Form using C1 Symmetry -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-0610 | |||||||||
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Title | Reconstruction of CDTb Double Heptamer Short Form using C1 Symmetry | |||||||||
![]() | Structure of the CDTb prepore/pore double heptamer with C1 symmetry applied. | |||||||||
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![]() | CDTb / ![]() ![]() | |||||||||
Function / homology | ![]() protein homooligomerization / ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Lacy DB / Sheedlo MJ | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural insights into the transition of Clostridioides difficile binary toxin from prepore to pore. Authors: David M Anderson / Michael J Sheedlo / Jaime L Jensen / D Borden Lacy / ![]() Abstract: Clostridioides (formerly Clostridium) difficile is a Gram-positive, spore-forming anaerobe and a leading cause of hospital-acquired infection and gastroenteritis-associated death in US hospitals. The ...Clostridioides (formerly Clostridium) difficile is a Gram-positive, spore-forming anaerobe and a leading cause of hospital-acquired infection and gastroenteritis-associated death in US hospitals. The disease state is usually preceded by disruption of the host microbiome in response to antibiotic treatment and is characterized by mild to severe diarrhoea. C. difficile infection is dependent on the secretion of one or more AB-type toxins: toxin A (TcdA), toxin B (TcdB) and the C. difficile transferase toxin (CDT). Whereas TcdA and TcdB are considered the primary virulence factors, recent studies suggest that CDT increases the severity of C. difficile infection in some of the most problematic clinical strains. To better understand how CDT functions, we used cryo-electron microscopy to define the structure of CDTb, the cell-binding component of CDT. We obtained structures of several oligomeric forms that highlight the conformational changes that enable conversion from a prepore to a β-barrel pore. The structural analysis also reveals a glycan-binding domain and residues involved in binding the host-cell receptor, lipolysis-stimulated lipoprotein receptor. Together, these results provide a framework to understand how CDT functions at the host cell interface. | |||||||||
History |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 55.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11.4 KB 11.4 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 8.9 KB | Display | ![]() |
Images | ![]() | 42.1 KB | ||
Filedesc metadata | ![]() | 6 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6o2oMC ![]() 0608C ![]() 0609C ![]() 6o2mC ![]() 6o2nC ![]() 6okrC ![]() 6oksC ![]() 6oktC ![]() 6okuC 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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Related items in Molecule of the Month |
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Map
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Annotation | Structure of the CDTb prepore/pore double heptamer with C1 symmetry applied. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.45 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 : CDTb
Entire | Name: CDTb |
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Components |
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-Supramolecule #1: CDTb
Supramolecule | Name: CDTb / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: ADP-ribosyltransferase binding component
Macromolecule | Name: ADP-ribosyltransferase binding component / type: protein_or_peptide / ID: 1 / Number of copies: 14 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 98.916828 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MKIQMRNKKV LSFLTLTAIV SQALVYPVYA QTSTSNHSNK KKEIVNEDIL PNNGLMGYYF TDEHFKDLKL MAPIKDGNLK FEEKKVDKL LDKDKSDVKS IRWTGRIIPS KDGEYTLSTD RDDVLMQVNT ESTISNTLKV NMKKGKEYKV RIELQDKNLG S IDNLSSPN ...String: MKIQMRNKKV LSFLTLTAIV SQALVYPVYA QTSTSNHSNK KKEIVNEDIL PNNGLMGYYF TDEHFKDLKL MAPIKDGNLK FEEKKVDKL LDKDKSDVKS IRWTGRIIPS KDGEYTLSTD RDDVLMQVNT ESTISNTLKV NMKKGKEYKV RIELQDKNLG S IDNLSSPN LYWELDGMKK IIPEENLFLR DYSNIEKDDP FIPNNNFFDP KLMSDWEDED LDTDNDNIPD SYERNGYTIK DL IAVKWED SFAEQGYKKY VSNYLESNTA GDPYTDYEKA SGSFDKAIKT EARDPLVAAY PIVGVGMEKL IISTNEHAST DQG KTVSRA TTNSKTESNT AGVSVNVGYQ NGFTANVTTN YSHTTDNSTA VQDSNGESWN TGLSINKGES AYINANVRYY NTGT APMYK VTPTTNLVLD GDTLSTIKAQ ENQIGNNLSP GDTYPKKGLS PLALNTMDQF SSRLIPINYD QLKKLDAGKQ IKLET TQVS GNFGTKNSSG QIVTEGNSWS DYISQIDSIS ASIILDTENE SYERRVTAKN LQDPEDKTPE LTIGEAIEKA FGATKK DGL LYFNDIPIDE SCVELIFDDN TANKIKDSLK TLSDKKIYNV KLERGMNILI KTPTYFTNFD DYNNYPSTWS NVNTTNQ DG LQGSANKLNG ETKIKIPMSE LKPYKRYVFS GYSKDPLTSN SIIVKIKAKE EKTDYLVPEQ GYTKFSYEFE TTEKDSSN I EITLIGSGTT YLDNLSITEL NSTPEILDEP EVKIPTDQEI MDAHKIYFAD LNFNPSTGNT YINGMYFAPT QTNKEALDY IQKYRVEATL QYSGFKDIGT KDKEMRNYLG DPNQPKTNYV NLRSYFTGGE NIMTYKKLRI YAITPDDREL LVLSVD UniProtKB: ![]() |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 8 |
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Grid | Model: Quantifoil R2/1 / Material: COPPER / Mesh: 400 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 293 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
Sample stage | Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Number grids imaged: 2 / Number real images: 4914 / Average exposure time: 9.6 sec. / Average electron dose: 110.1 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: AB INITIO MODEL |
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Output model | ![]() PDB-6o2o: |