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- PDB-8cr9: Cryo-EM structure of PcrV/Fab(30-B8) -

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Basic information

Entry
Database: PDB / ID: 8cr9
TitleCryo-EM structure of PcrV/Fab(30-B8)
Components
  • Heavy chain
  • Maltose/maltodextrin-binding periplasmic protein,Type III secretion protein PcrV
  • light chain
KeywordsANTIMICROBIAL PROTEIN / antibody T3SS Tip protein
Function / homology
Function and homology information


type III protein secretion system complex / protein secretion by the type III secretion system / detection of maltose stimulus / maltose transport complex / maltose binding / carbohydrate transport / maltose transport / maltodextrin transmembrane transport / carbohydrate transmembrane transporter activity / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing ...type III protein secretion system complex / protein secretion by the type III secretion system / detection of maltose stimulus / maltose transport complex / maltose binding / carbohydrate transport / maltose transport / maltodextrin transmembrane transport / carbohydrate transmembrane transporter activity / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / ATP-binding cassette (ABC) transporter complex / cell chemotaxis / outer membrane-bounded periplasmic space / periplasmic space / DNA damage response / extracellular space / membrane
Similarity search - Function
Low calcium response V antigen / Virulence-associated V antigen superfamily / V antigen (LcrV) protein / Maltose/Cyclodextrin ABC transporter, substrate-binding protein / Solute-binding family 1, conserved site / Bacterial extracellular solute-binding proteins, family 1 signature. / Bacterial extracellular solute-binding protein / Bacterial extracellular solute-binding protein
Similarity search - Domain/homology
Type III secretion protein PcrV / Maltose/maltodextrin-binding periplasmic protein
Similarity search - Component
Biological speciesHomo sapiens (human)
Pseudomonas aeruginosa (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.2 Å
AuthorsYuan, B. / Simonis, A. / Marlovits, T.C.
Funding support Germany, 1items
OrganizationGrant numberCountry
German Research Foundation (DFG) Germany
CitationJournal: Cell / Year: 2023
Title: Discovery of highly neutralizing human antibodies targeting Pseudomonas aeruginosa.
Authors: Alexander Simonis / Christoph Kreer / Alexandra Albus / Katharina Rox / Biao Yuan / Dmitriy Holzmann / Joana A Wilms / Sylvia Zuber / Lisa Kottege / Sandra Winter / Meike Meyer / Kristin ...Authors: Alexander Simonis / Christoph Kreer / Alexandra Albus / Katharina Rox / Biao Yuan / Dmitriy Holzmann / Joana A Wilms / Sylvia Zuber / Lisa Kottege / Sandra Winter / Meike Meyer / Kristin Schmitt / Henning Gruell / Sebastian J Theobald / Anna-Maria Hellmann / Christina Meyer / Meryem Seda Ercanoglu / Nina Cramer / Antje Munder / Michael Hallek / Gerd Fätkenheuer / Manuel Koch / Harald Seifert / Ernst Rietschel / Thomas C Marlovits / Silke van Koningsbruggen-Rietschel / Florian Klein / Jan Rybniker /
Abstract: Drug-resistant Pseudomonas aeruginosa (PA) poses an emerging threat to human health with urgent need for alternative therapeutic approaches. Here, we deciphered the B cell and antibody response to ...Drug-resistant Pseudomonas aeruginosa (PA) poses an emerging threat to human health with urgent need for alternative therapeutic approaches. Here, we deciphered the B cell and antibody response to the virulence-associated type III secretion system (T3SS) in a cohort of patients chronically infected with PA. Single-cell analytics revealed a diverse B cell receptor repertoire directed against the T3SS needle-tip protein PcrV, enabling the production of monoclonal antibodies (mAbs) abrogating T3SS-mediated cytotoxicity. Mechanistic studies involving cryoelectron microscopy identified a surface-exposed C-terminal PcrV epitope as the target of highly neutralizing mAbs with broad activity against drug-resistant PA isolates. These anti-PcrV mAbs were as effective as treatment with conventional antibiotics in vivo. Our study reveals that chronically infected patients represent a source of neutralizing antibodies, which can be exploited as therapeutics against PA.
History
DepositionMar 8, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0Nov 22, 2023Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Heavy chain
B: light chain
C: Maltose/maltodextrin-binding periplasmic protein,Type III secretion protein PcrV


Theoretical massNumber of molelcules
Total (without water)122,9313
Polymers122,9313
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Antibody Heavy chain


Mass: 23673.465 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#2: Antibody light chain


Mass: 23719.266 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#3: Protein Maltose/maltodextrin-binding periplasmic protein,Type III secretion protein PcrV / MMBP / Maltodextrin-binding protein / Maltose-binding protein / MBP


Mass: 75538.055 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa (bacteria) / Gene: malE, b4034, JW3994, pcrV, PA1706 / Production host: Escherichia coli (E. coli) / References: UniProt: P0AEX9, UniProt: G3XD49

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: PcrV-Fab(30-B8) / Type: COMPLEX / Entity ID: all / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4 / Details: 1xPBS
SpecimenConc.: 1.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE-PROPANE / Humidity: 100 %

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 1.5 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: UCSF ChimeraX / Version: 1.3/v9 / Classification: model building / URL: https://www.rbvi.ucsf.edu/chimerax/ / Os: Linux / Type: package
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 292189 / Symmetry type: POINT

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