[English] 日本語
Yorodumi
- EMDB-15702: Inner membrane ring and secretin N0 N1 domains of the type 3 secr... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-15702
TitleInner membrane ring and secretin N0 N1 domains of the type 3 secretion system of Shigella flexneri
Map dataMain map sharpened and masked
Sample
  • Complex: Needle complex of the type 3 secretion system
    • Complex: Inner membrane ring
      • Protein or peptide: Protein MxiG
      • Protein or peptide: Lipoprotein MxiJ
    • Complex: Connector
      • Protein or peptide: Outer membrane protein MxiD
Function / homology
Function and homology information


type III protein secretion system complex / protein secretion by the type III secretion system / protein secretion / cell outer membrane / plasma membrane
Similarity search - Function
Type III secretion system lipoprotein HrcJ/YscJ / Type III secretion system, PrgH/EprH-like / Type III secretion system protein PrgH-EprH (PrgH) / : / SPI-1 type 3 secretion system secretin, N0 domain / Type III secretion system outer membrane pore YscC/HrcC / Bacterial type II secretion system protein D signature. / Type II secretion system protein GspD, conserved site / NolW-like / Bacterial type II/III secretion system short domain ...Type III secretion system lipoprotein HrcJ/YscJ / Type III secretion system, PrgH/EprH-like / Type III secretion system protein PrgH-EprH (PrgH) / : / SPI-1 type 3 secretion system secretin, N0 domain / Type III secretion system outer membrane pore YscC/HrcC / Bacterial type II secretion system protein D signature. / Type II secretion system protein GspD, conserved site / NolW-like / Bacterial type II/III secretion system short domain / NolW-like superfamily / Type II/III secretion system / Bacterial type II and III secretion system protein / Lipoprotein YscJ/Flagellar M-ring protein / Secretory protein of YscJ/FliF family / Flagellar M-ring , N-terminal / AMP-binding enzyme, C-terminal domain superfamily / Prokaryotic membrane lipoprotein lipid attachment site profile.
Similarity search - Domain/homology
Protein MxiG / Type 3 secretion system secretin / Lipoprotein MxiJ
Similarity search - Component
Biological speciesShigella flexneri (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.34 Å
AuthorsLunelli M
Funding support Germany, 1 items
OrganizationGrant numberCountry
Helmholtz Association Germany
CitationJournal: Protein Sci / Year: 2023
Title: Integrative structural analysis of the type III secretion system needle complex from Shigella flexneri.
Authors: Lara Flacht / Michele Lunelli / Karol Kaszuba / Zhuo Angel Chen / Francis J O' Reilly / Juri Rappsilber / Jan Kosinski / Michael Kolbe /
Abstract: The type III secretion system (T3SS) is a large, transmembrane protein machinery used by various pathogenic gram-negative bacteria to transport virulence factors into the host cell during infection. ...The type III secretion system (T3SS) is a large, transmembrane protein machinery used by various pathogenic gram-negative bacteria to transport virulence factors into the host cell during infection. Understanding the structure of T3SSs is crucial for future developments of therapeutics that could target this system. However, much of the knowledge about the structure of T3SS is available only for Salmonella, and it is unclear how this large assembly is conserved across species. Here, we combined cryo-electron microscopy, cross-linking mass spectrometry, and integrative modeling to determine the structure of the T3SS needle complex from Shigella flexneri. We show that the Shigella T3SS exhibits unique features distinguishing it from other structurally characterized T3SSs. The secretin pore complex adopts a new fold of its C-terminal S domain and the pilotin MxiM[SctG] locates around the outer surface of the pore. The export apparatus structure exhibits a conserved pseudohelical arrangement but includes the N-terminal domain of the SpaS[SctU] subunit, which was not present in any of the previously published virulence-related T3SS structures. Similar to other T3SSs, however, the apparatus is anchored within the needle complex by a network of flexible linkers that either adjust conformation to connect to equivalent patches on the secretin oligomer or bind distinct surface patches at the same height of the export apparatus. The conserved and unique features delineated by our analysis highlight the necessity to analyze T3SS in a species-specific manner, in order to fully understand the underlying molecular mechanisms of these systems. The structure of the type III secretion system from Shigella flexneri delineates conserved and unique features, which could be used for the development of broad-range therapeutics.
History
DepositionAug 31, 2022-
Header (metadata) releaseMar 1, 2023-
Map releaseMar 1, 2023-
UpdateApr 12, 2023-
Current statusApr 12, 2023Processing site: PDBe / Status: Released

-
Structure visualization

Supplemental images

emd_15702.png

Downloads & links

-
Map

FileDownload / File: emd_15702.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMain map sharpened and masked
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.38 Å/pix.
x 480 pix.
= 664.171 Å		1.38 Å/pix.
x 480 pix.
= 664.171 Å		1.38 Å/pix.
x 480 pix.
= 664.171 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.38369 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.07
Minimum - Maximum-0.21275741 - 0.38857073
Average (Standard dev.)0.00019650516 (±0.0070325555)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions480480480
Spacing480480480
CellA=B=C: 664.1712 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Mask #1

Fileemd_15702_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #1

Fileemd_15702_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #2

Fileemd_15702_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Sample components

-
Entire : Needle complex of the type 3 secretion system

EntireName: Needle complex of the type 3 secretion system
Components
  • Complex: Needle complex of the type 3 secretion system
    • Complex: Inner membrane ring
      • Protein or peptide: Protein MxiG
      • Protein or peptide: Lipoprotein MxiJ
    • Complex: Connector
      • Protein or peptide: Outer membrane protein MxiD

-
Supramolecule #1: Needle complex of the type 3 secretion system

SupramoleculeName: Needle complex of the type 3 secretion system / type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Shigella flexneri (bacteria)

-
Supramolecule #2: Inner membrane ring

SupramoleculeName: Inner membrane ring / type: complex / ID: 2 / Chimera: Yes / Parent: 1 / Macromolecule list: #1-#2
Source (natural)Organism: Shigella flexneri (bacteria)

-
Supramolecule #3: Connector

SupramoleculeName: Connector / type: complex / ID: 3 / Chimera: Yes / Parent: 1 / Macromolecule list: #3
Details: Ring formed by the domains N0 and N1 of the secretin MxiD
Source (natural)Organism: Shigella flexneri (bacteria)

-
Macromolecule #1: Protein MxiG

MacromoleculeName: Protein MxiG / type: protein_or_peptide / ID: 1 / Number of copies: 24 / Enantiomer: LEVO
Source (natural)Organism: Shigella flexneri (bacteria)
Molecular weightTheoretical: 43.053844 KDa
SequenceString: MSEAKNSNLA PFRLLVKLTN GVGDEFPLYY GNNLIVLGRT IETLEFGNDN FPENIIPVTD SKSDGIIYLT ISKDNICQFS DEKGEQIDI NSQFNSFEYD GISFHLKNMR EDKSRGHILN GMYKNHSVFF FFAVIVVLII IFSLSLKKDE VKEIAEIIDD K RYGIVNTG ...String:
MSEAKNSNLA PFRLLVKLTN GVGDEFPLYY GNNLIVLGRT IETLEFGNDN FPENIIPVTD SKSDGIIYLT ISKDNICQFS DEKGEQIDI NSQFNSFEYD GISFHLKNMR EDKSRGHILN GMYKNHSVFF FFAVIVVLII IFSLSLKKDE VKEIAEIIDD K RYGIVNTG QCNYILAETQ NDAVWASVAL NKTGFTKCRY ILVSNKEINR IQQYINQRFP FINLYVLNLV SDKAELLVFL SK ERNSSKD TELDKLKNAL IVEFPYIKNI KFNYLSDHNA RGDAKGIFTK VNVQYKEICE NNKVTYSVRE ELTDEKLELI NRL ISEHKN IYGDQYIEFS VLLIDDDFKG KSYLNSKDSY VMLNDKHWFF LDKNK

-
Macromolecule #2: Lipoprotein MxiJ

MacromoleculeName: Lipoprotein MxiJ / type: protein_or_peptide / ID: 2 / Number of copies: 24 / Enantiomer: LEVO
Source (natural)Organism: Shigella flexneri (bacteria)
Molecular weightTheoretical: 27.542055 KDa
SequenceString: MIRYKGFILF LLLMLIGCEQ REELISNLSQ RQANEIISVL ERHNITARKV DGGKQGISVQ VEKGTFASAV DLMRMYDLPN PERVDISQM FPTDSLVSSP RAEKARLYSA IEQRLEQSLV SIGGVISAKI HVSYDLEEKN ISSKPMHISV IAIYDSPKES E LLVSNIKR ...String:
MIRYKGFILF LLLMLIGCEQ REELISNLSQ RQANEIISVL ERHNITARKV DGGKQGISVQ VEKGTFASAV DLMRMYDLPN PERVDISQM FPTDSLVSSP RAEKARLYSA IEQRLEQSLV SIGGVISAKI HVSYDLEEKN ISSKPMHISV IAIYDSPKES E LLVSNIKR FLKNTFSDVK YENISVILTP KEEYVYTNVQ PVKEVKSEFL TNEVIYLFLG MAVLVVILLV WAFKTGWFKR NK I

-
Macromolecule #3: Outer membrane protein MxiD

MacromoleculeName: Outer membrane protein MxiD / type: protein_or_peptide / ID: 3 / Number of copies: 16 / Enantiomer: LEVO
Source (natural)Organism: Shigella flexneri (bacteria)
Molecular weightTheoretical: 63.230414 KDa
SequenceString: MKKFNIKSLT LLIVLLPLIV NANNIDSHLL EQNDIAKYVA QSDTVGSFFE RFSALLNYPI VVSKQAAKKR ISGEFDLSNP EEMLEKLTL LVGLIWYKDG NALYIYDSGE LISKVILLEN ISLNYLIQYL KDANLYDHRY PIRGNISDKT FYISGPPALV E LVANTATL ...String:
MKKFNIKSLT LLIVLLPLIV NANNIDSHLL EQNDIAKYVA QSDTVGSFFE RFSALLNYPI VVSKQAAKKR ISGEFDLSNP EEMLEKLTL LVGLIWYKDG NALYIYDSGE LISKVILLEN ISLNYLIQYL KDANLYDHRY PIRGNISDKT FYISGPPALV E LVANTATL LDKQVSSIGT DKVNFGVIKL KNTFVSDRTY NMRGEDIVIP GVATVVERLL NNGKALSNRQ AQNDPMPPFN IT QKVSEDS NDFSFSSVTN SSILEDVSLI AYPETNSILV KGNDQQIQII RDIITQLDVA KRHIELSLWI IDIDKSELNN LGV NWQGTA SFGDSFGASF NMSSSASIST LDGNKFIASV MALNQKKKAN VVSRPVILTQ ENIPAIFDNN RTFYVSLVGE RNSS LEHVT YGTLINVIPR FSSRGQIEMS LTIEDGTGNS QSNYNYNNEN TSVLPEVGRT KISTIARVPQ GKSLLIGGYT HETNS NEII SIPFLSSIPV IGNVFKYKTS NISNIVRVFL IQPREIKESS YYNTAEYKSL ISEREIQKTT QIIPSETTLL EDEKSL VSY LNY

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

BufferpH: 8
GridModel: Quantifoil R2/1 / Material: COPPER / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK IV

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 4.0 µm / Nominal defocus min: 1.5 µm / Nominal magnification: 101179
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: FEI FALCON II (4k x 4k) / Detector mode: INTEGRATING / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Digitization - Frames/image: 1-6 / Number grids imaged: 1 / Number real images: 5238 / Average exposure time: 1.5 sec. / Average electron dose: 25.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

-
Image processing

Startup modelType of model: EMDB MAP
EMDB ID:

10040

Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
Final reconstructionApplied symmetry - Point group: C8 (8 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.34 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Details: Focused reconstruction / Number images used: 90547
FSC plot (resolution estimation)

-
Atomic model buiding 1

Initial modelPDB ID:

6rwk

RefinementSpace: REAL / Protocol: FLEXIBLE FIT / Overall B value: 67
Output model

PDB-8axn:
Inner membrane ring and secretin N0 N1 domains of the type 3 secretion system of Shigella flexneri

+
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