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- EMDB-24250: State 1 of TcdB and FZD2 at pH5 -

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Basic information

Entry
Database: EMDB / ID: EMD-24250
TitleState 1 of TcdB and FZD2 at pH5
Map dataState 1 of TcdB and FZD2 at pH5
Sample
  • Complex: State 1 of TcdB and FZD2 at pH5
    • Organelle or cellular component: Ternary structure of frizzled-2 CRD domain
      • Protein or peptide: Frizzled-2
    • Organelle or cellular component: Ternary structure of Clostridium difficile TcdB
      • Protein or peptide: Toxin B
KeywordsTOXIN
Function / homology
Function and homology information


muscular septum morphogenesis / symbiont-mediated perturbation of host actin cytoskeleton via filamentous actin depolymerization / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / Wnt receptor activity / non-canonical Wnt signaling pathway / membranous septum morphogenesis / endothelial cell differentiation / cochlea morphogenesis / Wnt-protein binding / glucosyltransferase activity ...muscular septum morphogenesis / symbiont-mediated perturbation of host actin cytoskeleton via filamentous actin depolymerization / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / Wnt receptor activity / non-canonical Wnt signaling pathway / membranous septum morphogenesis / endothelial cell differentiation / cochlea morphogenesis / Wnt-protein binding / glucosyltransferase activity / hard palate development / inner ear receptor cell development / Class B/2 (Secretin family receptors) / Disassembly of the destruction complex and recruitment of AXIN to the membrane / Wnt signaling pathway, planar cell polarity pathway / Transferases; Glycosyltransferases; Hexosyltransferases / host cell cytosol / outflow tract morphogenesis / canonical Wnt signaling pathway / cysteine-type peptidase activity / host cell endosome membrane / TCF dependent signaling in response to WNT / Asymmetric localization of PCP proteins / PDZ domain binding / clathrin-coated endocytic vesicle membrane / G protein-coupled receptor activity / Wnt signaling pathway / neuron differentiation / sensory perception of smell / cell-cell signaling / toxin activity / Ca2+ pathway / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / focal adhesion / lipid binding / positive regulation of DNA-templated transcription / host cell plasma membrane / proteolysis / extracellular region / metal ion binding / membrane / plasma membrane / cytoplasm
Similarity search - Function
Frizzled 2, cysteine-rich domain / Frizzled/Smoothened, transmembrane domain / Frizzled/Smoothened family membrane region / Frizzled/Smoothened family membrane region / Frizzled/secreted frizzled-related protein / TcdA/TcdB toxin, pore forming domain / TcdA/TcdB pore forming domain / Frizzled / CGT/MARTX, cysteine protease (CPD) domain / CGT/MARTX, cysteine protease (CPD) domain superfamily ...Frizzled 2, cysteine-rich domain / Frizzled/Smoothened, transmembrane domain / Frizzled/Smoothened family membrane region / Frizzled/Smoothened family membrane region / Frizzled/secreted frizzled-related protein / TcdA/TcdB toxin, pore forming domain / TcdA/TcdB pore forming domain / Frizzled / CGT/MARTX, cysteine protease (CPD) domain / CGT/MARTX, cysteine protease (CPD) domain superfamily / Peptidase C80 family / CGT/MARTX cysteine protease (CPD) domain profile. / TcdA/TcdB toxin, N-terminal helical domain / TcdB toxin N-terminal helical domain / TcdA/TcdB toxin, catalytic glycosyltransferase domain / TcdA/TcdB catalytic glycosyltransferase domain / Frizzled domain / Frizzled cysteine-rich domain superfamily / Fz domain / Frizzled (fz) domain profile. / Choline-binding repeat / Putative cell wall binding repeat / Cell wall/choline-binding repeat / Cell wall-binding repeat profile. / GPCR, family 2-like / G-protein coupled receptors family 2 profile 2. / Nucleotide-diphospho-sugar transferases
Similarity search - Domain/homology
Toxin B / Frizzled-2
Similarity search - Component
Biological speciesClostridioides difficile (bacteria) / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.1 Å
AuthorsJiang M / Zhang J
Funding support United States, 1 items
OrganizationGrant numberCountry
Welch Foundation United States
CitationJournal: To Be Published
Title: Structural Basis for Receptor Recognition of Clostridium difficile Toxin B and its Dissociation upon Acidification
Authors: Jiang M / Zhang J
History
DepositionJun 16, 2021-
Header (metadata) releaseMar 2, 2022-
Map releaseMar 2, 2022-
UpdateMay 14, 2025-
Current statusMay 14, 2025Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.037
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by radius
  • Surface level: 0.037
  • Imaged by UCSF Chimera
  • Download
  • Surface view with fitted model
  • Atomic models: PDB-7n95
  • Surface level: 0.037
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_24250.png

Downloads & links

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Map

FileDownload / File: emd_24250.map.gz / Format: CCP4 / Size: 299.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationState 1 of TcdB and FZD2 at pH5
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 428 pix.
= 453.958 Å		1.06 Å/pix.
x 428 pix.
= 453.958 Å		1.06 Å/pix.
x 428 pix.
= 453.958 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.06065 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.037 / Movie #1: 0.037
Minimum - Maximum-0.0017330226 - 1.8489892
Average (Standard dev.)0.00060244487 (±0.017914988)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions428428428
Spacing428428428
CellA=B=C: 453.9582 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.06064953271031.06064953271031.0606495327103
M x/y/z428428428
origin x/y/z0.0000.0000.000
length x/y/z453.958453.958453.958
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ450450450
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS428428428
D min/max/mean-0.0021.8490.001

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Supplemental data

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Sample components

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Entire : State 1 of TcdB and FZD2 at pH5

EntireName: State 1 of TcdB and FZD2 at pH5
Components
  • Complex: State 1 of TcdB and FZD2 at pH5
    • Organelle or cellular component: Ternary structure of frizzled-2 CRD domain
      • Protein or peptide: Frizzled-2
    • Organelle or cellular component: Ternary structure of Clostridium difficile TcdB
      • Protein or peptide: Toxin B

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Supramolecule #1: State 1 of TcdB and FZD2 at pH5

SupramoleculeName: State 1 of TcdB and FZD2 at pH5 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Clostridioides difficile (bacteria)
Molecular weightTheoretical: 250 KDa

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Supramolecule #2: Ternary structure of frizzled-2 CRD domain

SupramoleculeName: Ternary structure of frizzled-2 CRD domain / type: organelle_or_cellular_component / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: Ternary structure of Clostridium difficile TcdB

SupramoleculeName: Ternary structure of Clostridium difficile TcdB / type: organelle_or_cellular_component / ID: 3 / Parent: 1 / Macromolecule list: #2
Source (natural)Organism: Clostridioides difficile (bacteria)

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Macromolecule #1: Frizzled-2

MacromoleculeName: Frizzled-2 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.834912 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
DHGFCQPISI PLCTDIAYNQ TIMPNLLGHT NQEDAGLEVH QFYPLVKVQC SPELRFFLCS MYAPVCTVLE QAIPPCRSIC ERARQGCEA LMNKFGFQWP ERLRCEHFPR HGAEQICVGQ NH

UniProtKB: Frizzled-2

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Macromolecule #2: Toxin B

MacromoleculeName: Toxin B / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
EC number: Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases
Source (natural)Organism: Clostridioides difficile (bacteria)
Molecular weightTheoretical: 269.938438 KDa
Recombinant expressionOrganism: Bacillus megaterium NBRC 15308 = ATCC 14581 (bacteria)
SequenceString: MSLVNRKQLE KMANVRFRTQ EDEYVAILDA LEEYHNMSEN TVVEKYLKLK DINSLTDIYI DTYKKSGRNK ALKKFKEYLV TEVLELKNN NLTPVEKNLH FVWIGGQIND TAINYINQWK DVNSDYNVNV FYDSNAFLIN TLKKTVVESA INDTLESFRE N LNDPRFDY ...String:
MSLVNRKQLE KMANVRFRTQ EDEYVAILDA LEEYHNMSEN TVVEKYLKLK DINSLTDIYI DTYKKSGRNK ALKKFKEYLV TEVLELKNN NLTPVEKNLH FVWIGGQIND TAINYINQWK DVNSDYNVNV FYDSNAFLIN TLKKTVVESA INDTLESFRE N LNDPRFDY NKFFRKRMEI IYDKQKNFIN YYKAQREENP ELIIDDIVKT YLSNEYSKEI DELNTYIEES LNKITQNSGN DV RNFEEFK NGESFNLYEQ ELVERWNLAA ASDILRISAL KEIGGMYLDV DMLPGIQPDL FESIEKPSSV TVDFWEMTKL EAI MKYKEY IPEYTSEHFD MLDEEVQSSF ESVLASKSDK SEIFSSLGDM EASPLEVKIA FNSKGIINQG LISVKDSYCS NLIV KQIEN RYKILNNSLN PAISEDNDFN TTTNTFIDSI MAEANADNGR FMMELGKYLR VGFFPDVKTT INLSGPEAYA AAYQD LLMF KEGSMNIHLI EADLRNFEIS KTNISQSTEQ EMASLWSFDD ARAKAQFEEY KRNYFEGSLG EDDNLDFSQN IVVDKE YLL EKISSLARSS ERGYIHYIVQ LQGDKISYEA ACNLFAKTPY DSVLFQKNIE DSEIAYYYNP GDGEIQEIDK YKIPSII SD RPKIKLTFIG HGKDEFNTDI FAGFDVDSLS TEIEAAIDLA KEDISPKSIE INLLGCNMFS YSINVEETYP GKLLLKVK D KISELMPSIS QDSIIVSANQ YEVRINSEGR RELLDHSGEW INKEESIIKD ISSKEYISFN PKENKITVKS KNLPELSTL LQEIRNNSNS SDIELEEKVM LTECEINVIS NIDTQIVEER IEEAKNLTSD SINYIKDEFK LIESISDALC DLKQQNELED SHFISFEDI SETDEGFSIR FINKETGESI FVETEKTIFS EYANHITEEI SKIKGTIFDT VNGKLVKKVN LDTTHEVNTL N AAFFIQSL IEYNSSKESL SNLSVAMKVQ VYAQLFSTGL NTITDAAKVV ELVSTALDET IDLLPTLSEG LPIIATIIDG VS LGAAIKE LSETSDPLLR QEIEAKIGIM AVNLTTATTA IITSSLGIAS GFSILLVPLA GISAGIPSLV NNELVLRDKA TKV VDYFKH VSLVETEGVF TLLDDKIMMP QDDLVISEID FNNNSIVLGK CEIWRMEGGS GHTVTDDIDH FFSAPSITYR EPHL SIYDV LEVQKEELDL SKDLMVLPNA PNRVFAWETG WTPGLRSLEN DGTKLLDRIR DNYEGEFYWR YFAFIADALI TTLKP RYED TNIRINLDSN TRSFIVPIIT TEYIREKLSY SFYGSGGTYA LSLSQYNMGI NIELSESDVW IIDVDNVVRD VTIESD KIK KGDLIEGILS TLSIEENKII LNSHEINFSG EVNGSNGFVS LTFSILEGIN AIIEVDLLSK SYKLLISGEL KILMLNS NH IQQKIDYIGF NSELQKNIPY SFVDSEGKEN GFINGSTKEG LFVSELPDVV LISKVYMDDS KPSFGYYSNN LKDVKVIT K DNVNILTGYY LKDDIKISLS LTLQDEKTIK LNSVHLDESG VAEILKFMNR KGNTNTSDSL MSFLESMNIK SIFVNFLQS NIKFILDANF IISGTTSIGQ FEFICDENDN IQPYFIKFNT LETNYTLYVG NRQNMIVEPN YDLDDSGDIS STVINFSQKY LYGIDSCVN KVVISPNIYT DEINITPVYE TNNTYPEVIV LDANYINEKI NVNINDLSIR YVWSNDGNDF ILMSTSEENK V SQVKIRFV NVFKDKTLAN KLSFNFSDKQ DVPVSEIILS FTPSYYEDGL IGYDLGLVSL YNEKFYINNF GMMVSGLIYI ND SLYYFKP PVNNLITGFV TVGDDKYYFN PINGGAASIG ETIIDDKNYY FNQSGVLQTG VFSTEDGFKY FAPANTLDEN LEG EAIDFT GKLIIDENIY YFDDNYRGAV EWKELDGEMH YFSPETGKAF KGLNQIGDYK YYFNSDGVMQ KGFVSINDNK HYFD DSGVM KVGYTEIDGK HFYFAENGEM QIGVFNTEDG FKYFAHHNED LGNEEGEEIS YSGILNFNNK IYYFDDSFTA VVGWK DLED GSKYYFDEDT AEAYIGLSLI NDGQYYFNDD GIMQVGFVTI NDKVFYFSDS GIIESGVQNI DDNYFYIDDN GIVQIG VFD TSDGYKYFAP ANTVNDNIYG QAVEYSGLVR VGEDVYYFGE TYTIETGWIY DMENESDKYY FNPETKKACK GINLIDD IK YYFDEKGIMR TGLISFENNN YYFNENGEMQ FGYINIEDKM FYFGEDGVMQ IGVFNTPDGF KYFAHQNTLD ENFEGESI N YTGWLDLDEK RYYFTDEYIA ATGSVIIDGE EYYFDPDTAQ LVISE

UniProtKB: Toxin B

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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: 5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: OTHER / Details: model prediction
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 101248
Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: ANGULAR RECONSTITUTION

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