[English] 日本語
Yorodumi
- PDB-7q5p: Structure of VgrG1 from Pseudomonas protegens. -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 7q5p
TitleStructure of VgrG1 from Pseudomonas protegens.
ComponentsType VI secretion protein VgrGType VI secretion system
KeywordsTOXIN / bacterial type VI secretion system / VgrG
Function / homologyType VI secretion system, RhsGE-associated Vgr family subset / Type VI secretion system, RhsGE-associated Vgr protein / Gp5/Type VI secretion system Vgr protein, OB-fold domain / Type VI secretion system/phage-baseplate injector OB domain / Vgr protein, OB-fold domain superfamily / Type VI secretion protein VgrG
Function and homology information
Biological speciesPseudomonas fluorescens (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsGuenther, P. / Quentin, D. / Ahmad, S. / Sachar, K. / Gatsogiannis, C. / Whitney, J.C. / Raunser, S.
Funding support2items
OrganizationGrant numberCountry
Max Planck Society
Natural Sciences and Engineering Research Council (NSERC, Canada)RGPIN 2017 05350
CitationJournal: PLoS Pathog / Year: 2022
Title: Structure of a bacterial Rhs effector exported by the type VI secretion system.
Authors: Patrick Günther / Dennis Quentin / Shehryar Ahmad / Kartik Sachar / Christos Gatsogiannis / John C Whitney / Stefan Raunser /
Abstract: The type VI secretion system (T6SS) is a widespread protein export apparatus found in Gram-negative bacteria. The majority of T6SSs deliver toxic effector proteins into competitor bacteria. Yet, the ...The type VI secretion system (T6SS) is a widespread protein export apparatus found in Gram-negative bacteria. The majority of T6SSs deliver toxic effector proteins into competitor bacteria. Yet, the structure, function, and activation of many of these effectors remains poorly understood. Here, we present the structures of the T6SS effector RhsA from Pseudomonas protegens and its cognate T6SS spike protein, VgrG1, at 3.3 Å resolution. The structures reveal that the rearrangement hotspot (Rhs) repeats of RhsA assemble into a closed anticlockwise β-barrel spiral similar to that found in bacterial insecticidal Tc toxins and in metazoan teneurin proteins. We find that the C-terminal toxin domain of RhsA is autoproteolytically cleaved but remains inside the Rhs 'cocoon' where, with the exception of three ordered structural elements, most of the toxin is disordered. The N-terminal 'plug' domain is unique to T6SS Rhs proteins and resembles a champagne cork that seals the Rhs cocoon at one end while also mediating interactions with VgrG1. Interestingly, this domain is also autoproteolytically cleaved inside the cocoon but remains associated with it. We propose that mechanical force is required to remove the cleaved part of the plug, resulting in the release of the toxin domain as it is delivered into a susceptible bacterial cell by the T6SS.
History
DepositionNov 4, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Dec 15, 2021Provider: repository / Type: Initial release
Revision 1.1Feb 2, 2022Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.name

-
Structure visualization

Movie
  • Deposited structure unit
  • Imaged by Jmol
  • Download
  • Simplified surface model + fitted atomic model
  • EMDB-13843
  • Imaged by Jmol
  • Download
  • Superimposition on EM map
  • EMDB-13843
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Type VI secretion protein VgrG
B: Type VI secretion protein VgrG
C: Type VI secretion protein VgrG


Theoretical massNumber of molelcules
Total (without water)216,2403
Polymers216,2403
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area49470 Å2
ΔGint-191 kcal/mol
Surface area64940 Å2

-
Components

#1: Protein Type VI secretion protein VgrG / Type VI secretion system


Mass: 72080.133 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas fluorescens (strain ATCC BAA-477 / NRRL B-23932 / Pf-5) (bacteria)
Strain: ATCC BAA-477 / NRRL B-23932 / Pf-5 / Gene: vgrG, PFL_6094 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q4K3N1

-
Experimental details

-
Experiment

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

-
Sample preparation

ComponentName: Structure of the VgrG1 trimer from Pseudomonas protegens.
Type: ORGANELLE OR CELLULAR COMPONENT / Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 0.215994 MDa / Experimental value: NO
Source (natural)Organism: Pseudomonas protegens Pf-5 (bacteria)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 8
SpecimenConc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: The sample was monodisperse.
Specimen supportGrid material: COPPER / Grid type: Quantifoil R2/1
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K

-
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 FIELDBright-field microscopy / Nominal magnification: 59000 X / Cs: 0.01 mm / C2 aperture diameter: 100 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (max): 70 K / Temperature (min): 70 K
Image recordingAverage exposure time: 1.5 sec. / Electron dose: 90 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON III (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1250
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV / Spherical aberration corrector: Cs corrector
Image scansWidth: 4096 / Height: 4096

-
Processing

SoftwareName: PHENIX / Version: dev_4338: / Classification: refinement
EM software
IDNameVersionCategory
2EPU1.9image acquisition
4CTFFIND4.1CTF correction
7UCSF ChimeraX1.2model fitting
9SPHIRE1.5initial Euler assignment
10SPHIRE1.5final Euler assignment
11SPHIRE3.1classification
12SPHIRE1.53D reconstruction
13PHENIX1.19.2model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C3 (3 fold cyclic)
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 423980 / Algorithm: FOURIER SPACE / Num. of class averages: 396 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model buildingPDB-ID: 6H3N

6h3n


Pdb chain-ID: A / Pdb chain residue range: 1-643

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more