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- EMDB-41503: XptA2 wild type -

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ID or keywords:

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Basic information

Entry
Database: EMDB / ID: EMD-41503
TitleXptA2 wild type
Map data
Sample
  • Complex: Pentameric assembly of the XptA2 TcA
    • Protein or peptide: XptA2
KeywordsTcA / Insecticide / Translocase / TOXIN
Function / homology
Function and homology information


ABC toxin, N-terminal domain / ABC toxin N-terminal region / TcA receptor binding domain / TcA receptor binding domain / Insecticidal toxin complex/plasmid virulence protein / Tc toxin complex TcA, C-terminal TcB-binding domain / Neuraminidase-like domain / Salmonella virulence plasmid 28.1kDa A protein / Tc toxin complex TcA C-terminal TcB-binding domain / Neuraminidase-like domain
Similarity search - Domain/homology
A component of insecticidal toxin complex (Tc)
Similarity search - Component
Biological speciesXenorhabdus nematophila (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsMartin CL / Binshtein EM / Aller SG
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)P01HL128203 United States
CitationJournal: Int J Mol Sci / Year: 2023
Title: Structures of the Insecticidal Toxin Complex Subunit XptA2 Highlight Roles for Flexible Domains.
Authors: Cole L Martin / David W Chester / Christopher D Radka / Lurong Pan / Zhengrong Yang / Rachel C Hart / Elad M Binshtein / Zhao Wang / Lisa Nagy / Lawrence J DeLucas / Stephen G Aller /
Abstract: The Toxin Complex (Tc) superfamily consists of toxin translocases that contribute to the targeting, delivery, and cytotoxicity of certain pathogenic Gram-negative bacteria. Membrane receptor ...The Toxin Complex (Tc) superfamily consists of toxin translocases that contribute to the targeting, delivery, and cytotoxicity of certain pathogenic Gram-negative bacteria. Membrane receptor targeting is driven by the A-subunit (TcA), which comprises IgG-like receptor binding domains (RBDs) at the surface. To better understand XptA2, an insect specific TcA secreted by the symbiont from the intestine of entomopathogenic nematodes, we determined structures by X-ray crystallography and cryo-EM. Contrary to a previous report, XptA2 is pentameric. RBD-B exhibits an indentation from crystal packing that indicates loose association with the shell and a hotspot for possible receptor binding or a trigger for conformational dynamics. A two-fragment XptA2 lacking an intact linker achieved the folded pre-pore state like wild type (wt), revealing no requirement of the linker for protein folding. The linker is disordered in all structures, and we propose it plays a role in dynamics downstream of the initial pre-pore state.
History
DepositionAug 7, 2023-
Header (metadata) releaseSep 27, 2023-
Map releaseSep 27, 2023-
UpdateOct 11, 2023-
Current statusOct 11, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_41503.png

Downloads & links

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Map

FileDownload / File: emd_41503.map.gz / Format: CCP4 / Size: 169.2 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.268 Å
Density
Contour LevelBy AUTHOR: 0.02
Minimum - Maximum-0.09884512 - 0.21709806
Average (Standard dev.)-0.00008070155 (±0.006591217)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions354354354
Spacing354354354
CellA=B=C: 448.872 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_41503_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_41503_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Pentameric assembly of the XptA2 TcA

EntireName: Pentameric assembly of the XptA2 TcA
Components
  • Complex: Pentameric assembly of the XptA2 TcA
    • Protein or peptide: XptA2

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Supramolecule #1: Pentameric assembly of the XptA2 TcA

SupramoleculeName: Pentameric assembly of the XptA2 TcA / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Details: This is a Protein toxin that is secreted in bacteria. I assume the best category to pick from is Organelle or Cellular Component
Source (natural)Organism: Xenorhabdus nematophila (bacteria)
Molecular weightTheoretical: 1.4 MDa

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Macromolecule #1: XptA2

MacromoleculeName: XptA2 / type: protein_or_peptide / ID: 1 / Number of copies: 5 / Enantiomer: LEVO
Source (natural)Organism: Xenorhabdus nematophila (bacteria)
Molecular weightTheoretical: 284.392188 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MYSTAVLLNK ISPTRDGQTM TLADLQYLSF SELRKIFDDQ LSWGEARHLY HETIEQKKNN RLLEARIFTR ANPQLSGAIR LGIERDSVS RSYDEMFGAR SSSFVKPGSV ASMFSPAGYL TELYREAKDL HFSSSAYHLD NRRPDLADLT LSQSNMDTEI S TLTLSNEL ...String:
MYSTAVLLNK ISPTRDGQTM TLADLQYLSF SELRKIFDDQ LSWGEARHLY HETIEQKKNN RLLEARIFTR ANPQLSGAIR LGIERDSVS RSYDEMFGAR SSSFVKPGSV ASMFSPAGYL TELYREAKDL HFSSSAYHLD NRRPDLADLT LSQSNMDTEI S TLTLSNEL LLEHITRKTG GDSDALMESL STYRQAIDTP YHQPYETIRQ VIMTHDSTLS ALSRNPEVMG QAEGASLLAI LA NISPELY NILTEEITEK NADALFAQNF SENITPENFA SQSWIAKYYG LELSEVQKYL GMLQNGYSDS TSAYVDNIST GLV VNNESK LEAYKITRVK TDDYDKNINY FDLMYEGNNQ FFIRANFKVS REFGATLRKN AGPSGIVGSL SGPLIANTNF KSNY LSNIS DSEYKNGVKI YAYRYTSSTS ATNQGGGIFT FESYPLTIFA LKLNKAIRLC LTSGLSPNEL QTIVRSDNAQ GIIND SVLT KVFYTLFYSH RYALSFDDAQ VLNGSVINQY ADDDSVSHFN RLFNTPPLKG KIFEADGNTV SIDPDEEQST FARSAL MRG LGVNSGELYQ LGKLAGVLDA QNTITLSVFV ISSLYRLTLL ARVHQLTVNE LCMLYGLSPF NGKTTASLSS GELPRLV IW LYQVTQWLTE AEITTEAIWL LCTPEFSGNI SPEISNLLNN LRPSISEDMA QSHNRELQAE ILAPFIAATL HLASPDMA R YILLWTDNLR PGGLDIAGFM TLVLKESLNA NETTQLVQFC HVMAQLSLSV QTLRLSEAEL SVLVISGFAV LGAKNQPAG QHNIDTLFSL YRFHQWINGL GNPGSDTLDM LRQQTLTADR LASVMGLDIS MVTQAMVSAG VNQLQCWQDI NTVLQWIDVA SALHTMPSV IRTLVNIRYV TALNKAESNL PSWDEWQTLA ENMEAGLSTQ QAQTLADYTA ERLSSVLCNW FLANIQPEGV S LHSRDDLY SYFLIDNQVS SAIKTTRLAE AIAGIQLYIN RALNRIEPNA RADVSTRQFF TDWTVNNRYS TWGGVSRLVY YP ENYIDPT QRIGQTRMMD ELLENISQSK LSRDTVEDAF KTYLTRFETV ADLKVVSAYH DNVNSNTGLT WFVGQTRENL PEY YWRNVD ISRMQAGELA ANAWKEWTKI DTAVNPYKDA IRPVIFRERL HLIWVEKEEV AKNGTDPVET YDRFTLKLAF LRHD GSWSA PWSYDITTQV EAVTDKKPDT ERLALAASGF QGEDTLLVFV YKTGKSYSDF GGSNKNVAGM TIYGDGSFKK MENTA LSRY SQLKNTFDII HTQGNDLVRK ASYRFAQDFE VPASLNMGSA IGDDSLTVME NGNIPQITSK YSSDNLAITL HNAAFT VRY DGSGNVIRNK QISAMKLTGV DGKSQYGNAF IIANTVKHYG GYSDLGGPIT VYNKTKNYIA SVQGHLMNAD YTRRLIL TP VENNYYARLF EFPFSPNTIL NTVFTVGSNK TSDFKKCSYA VDGNNSQGFQ IFSSYQSSGW LDIDTGINNT DIKITVMA G SKTHTFTASD HIASLPANSF DAMPYTFKPL EIDASSLAFT NNIAPLDIVF ETKAKDGRVL GKIKQTLSVK RVNYNPEDI LFLRETHSGA QYMQLGVYRI RLNTLLASQL VSRANTGIDT ILTMETQRLP EPPLGEGFFA NFVLPKYDPA EHGDERWFKI HIGNVGGNT GRQPYYSGML SDTSETSMTL FVPYAEGYYM HEGVRLGVGY QKITYDNTWE SAFFYFDETK QQFVLINDAD H DSGMTQQG IVKNIKKYKG FLNVSIATGY SAPMDFNSAS ALYYWELFYY TPMMCFQRLL QEKQFDEATQ WINYVYNPAG YI VNGEIAP WIWNCRPLEE TTSWNANPLD AIDPDAVAQN DPMHYKIATF MRLLDQLILR GDMAYRELTR DALNEAKMWY VRT LELLGD EPEDYGSQQW AAPSLSGAAS QTVQAAYQQD LTMLGRGGVS KNLRTANSLV GLFLPEYNPA LTDYWQTLRL RLFN LRHNL SIDGQPLSLA IYAEPTDPKA LLTSMVQASQ GGSAVLPGTL SLYRFPVMLE RTRNLVAQLT QFGTSLLSMA EHDDA DELT TLLLQQGMEL ATQSIRIQQR TVDEVDADIA VLAESRRSAQ NRLEKYQQLY DEDINHGEQR AMSLLDAAAG QSLAGQ VLS IAEGVADLVP NVFGLACGGS RWGAALRASA SVMSLSATAS QYSADKISRS EAYRRRRQEW EIQRDNADGE VKQMDAQ LE SLKIRREAAQ MQVEYQETQQ AHTQAQLELL QRKFTNKALY SWMRGKLSAI YYQFFDLTQS FCLMAQEALR RELTDNGV T FIRGGAWNGT TAGLMAGETL LLNLAEMEKV WLERDERALE VTRTVSLAQF YQALSSDNFN LTEKLTQFLR EGKGNVGAS GNELKLSNRQ IEASVRLSDL KIFSDYPESL GNTRQLKQVS VTLPALVGPY EDIRAVLNYG GSIVMPRGCS AIALSHGVND SGQFMLDFN DSRYLPFEGI SVNDSGSLTL SFPDATDRQK ALLESLSDII LHIRYTIRS

UniProtKB: A component of insecticidal toxin complex (Tc)

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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

Concentration1.5 mg/mL
BufferpH: 7.4
GridMaterial: COPPER / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI POLARA 300
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.2 mm / Nominal defocus max: 4.0 µm / Nominal defocus min: 0.5 µm
Sample stageCooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 75.0 e/Å2
Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company

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Image processing

Startup modelType of model: INSILICO MODEL
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final 3D classificationSoftware - Name: RELION
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final reconstructionApplied symmetry - Point group: C5 (5 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 198591
FSC plot (resolution estimation)

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