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- EMDB-48175: Clostridioides difficile Transferase B Component Tetramer -

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ID or keywords:

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Basic information

Entry
Database: EMDB / ID: EMD-48175
TitleClostridioides difficile Transferase B Component Tetramer
Map dataCDTb tetramer sharpened map.
Sample
  • Complex: Clostridioides difficile Transferase Component B
    • Protein or peptide: Adp-ribosyltransferase binding component
  • Ligand: CALCIUM ION
KeywordsToxin / Clostridioides / Iota / ADP-ribosyltransferase
Function / homology
Function and homology information


protein homooligomerization / extracellular region
Similarity search - Function
Bacterial exotoxin B / Protective antigen, heptamerisation domain / Protective antigen, Ca-binding domain / Clostridial binary toxin B/anthrax toxin PA, domain 3 / Protective antigen, heptamerisation domain superfamily / Clostridial binary toxin B/anthrax toxin PA Ca-binding domain / Clostridial binary toxin B/anthrax toxin PA domain 2 / Clostridial binary toxin B/anthrax toxin PA domain 3 / PA14 domain / PA14 / PA14 domain
Similarity search - Domain/homology
Adp-ribosyltransferase binding component
Similarity search - Component
Biological speciesClostridioides difficile R20291 (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 7.01 Å
AuthorsSheedlo MJ / Mullard RM
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)R00AI154672 United States
CitationJournal: To Be Published
Title: Oligomerization of the Clostridioides difficile Transferase B Component Proceeds through a Stepwise Mechanism In Vitro
Authors: Sheedlo MJ / Mullard RM
History
DepositionDec 5, 2024-
Header (metadata) releaseJul 16, 2025-
Map releaseJul 16, 2025-
UpdateJul 16, 2025-
Current statusJul 16, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_48175.png

Downloads & links

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Map

FileDownload / File: emd_48175.map.gz / Format: CCP4 / Size: 149.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCDTb tetramer sharpened map.
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.86 Å/pix.
x 340 pix.
= 292.4 Å		0.86 Å/pix.
x 340 pix.
= 292.4 Å		0.86 Å/pix.
x 340 pix.
= 292.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.86 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.3
Minimum - Maximum-1.5107077 - 1.6322129
Average (Standard dev.)0.0011114392 (±0.05675761)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions340340340
Spacing340340340
CellA=B=C: 292.4 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: CDTb tetramer half map A.

Fileemd_48175_half_map_1.map
AnnotationCDTb tetramer half map A.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: CDTb tetramer half map B.

Fileemd_48175_half_map_2.map
AnnotationCDTb tetramer half map B.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Clostridioides difficile Transferase Component B

EntireName: Clostridioides difficile Transferase Component B
Components
  • Complex: Clostridioides difficile Transferase Component B
    • Protein or peptide: Adp-ribosyltransferase binding component
  • Ligand: CALCIUM ION

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Supramolecule #1: Clostridioides difficile Transferase Component B

SupramoleculeName: Clostridioides difficile Transferase Component B / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Clostridioides difficile R20291 (bacteria)
Molecular weightTheoretical: 300 KDa

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Macromolecule #1: Adp-ribosyltransferase binding component

MacromoleculeName: Adp-ribosyltransferase binding component / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Clostridioides difficile R20291 (bacteria)
Molecular weightTheoretical: 98.916828 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: 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: Adp-ribosyltransferase binding component

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Macromolecule #2: CALCIUM ION

MacromoleculeName: CALCIUM ION / type: ligand / ID: 2 / Number of copies: 12 / Formula: CA
Molecular weightTheoretical: 40.078 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 679889
CTF correctionSoftware - Name: cryoSPARC (ver. v4) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 7.01 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 25019
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. v4)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. v4)
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementProtocol: RIGID BODY FIT
Output model

PDB-9mdp:
Clostridioides difficile Transferase B Component Tetramer

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