[English] 日本語
Yorodumi
- EMDB-41968: Cryo-EM of Vibrio cholera toxin co-regulated pilus (TCP) -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-41968
TitleCryo-EM of Vibrio cholera toxin co-regulated pilus (TCP)
Map data
Sample
  • Complex: Toxin co-regulated pilus
    • Protein or peptide: Toxin coregulated pilin
KeywordsToxin / Cholera / Type IV pilus / CELL ADHESION
Function / homology
Function and homology information


extracellular organelle / pilus / membrane
Similarity search - Function
Toxin-coregulated pilus subunit TcpA / Toxin-coregulated pilus subunit TcpA / Prokaryotic N-terminal methylation site. / Prokaryotic N-terminal methylation motif / Prokaryotic N-terminal methylation site / Pilin-like
Similarity search - Domain/homology
Toxin coregulated pilin
Similarity search - Component
Biological speciesVibrio cholerae (bacteria)
Methodhelical reconstruction / cryo EM / Resolution: 4.9 Å
AuthorsSonani RR / Kundra S / Craig L / Egelman EH
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM122510 United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2023
Title: Tad and toxin-coregulated pilus structures reveal unexpected diversity in bacterial type IV pili.
Authors: Ravi R Sonani / Juan Carlos Sanchez / Joseph K Baumgardt / Shivani Kundra / Elizabeth R Wright / Lisa Craig / Edward H Egelman /
Abstract: Type IV pili (T4P) are ubiquitous in both bacteria and archaea. They are polymers of the major pilin protein, which has an extended and protruding N-terminal helix, α1, and a globular C-terminal ...Type IV pili (T4P) are ubiquitous in both bacteria and archaea. They are polymers of the major pilin protein, which has an extended and protruding N-terminal helix, α1, and a globular C-terminal domain. Cryo-EM structures have revealed key differences between the bacterial and archaeal T4P in their C-terminal domain structure and in the packing and continuity of α1. This segment forms a continuous α-helix in archaeal T4P but is partially melted in all published bacterial T4P structures due to a conserved helix breaking proline at position 22. The tad (tight adhesion) T4P are found in both bacteria and archaea and are thought to have been acquired by bacteria through horizontal transfer from archaea. Tad pilins are unique among the T4 pilins, being only 40 to 60 residues in length and entirely lacking a C-terminal domain. They also lack the Pro22 found in all high-resolution bacterial T4P structures. We show using cryo-EM that the bacterial tad pilus from is composed of continuous helical subunits that, like the archaeal pilins, lack the melted portion seen in other bacterial T4P and share the packing arrangement of the archaeal T4P. We further show that a bacterial T4P, the toxin coregulated pilus, which lacks Pro22 but is not in the tad family, has a continuous N-terminal α-helix, yet its α1 s are arranged similar to those in other bacterial T4P. Our results highlight the role of Pro22 in helix melting and support an evolutionary relationship between tad and archaeal T4P.
History
DepositionSep 14, 2023-
Header (metadata) releaseDec 6, 2023-
Map releaseDec 6, 2023-
UpdateDec 6, 2023-
Current statusDec 6, 2023Processing site: RCSB / Status: Released

-
Structure visualization

Supplemental images

emd_41968.png

Downloads & links

-
Map

FileDownload / File: emd_41968.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 0.83 Å
Density
Contour LevelBy AUTHOR: 0.1
Minimum - Maximum-0.29197547 - 0.49051952
Average (Standard dev.)0.0023427724 (±0.02256597)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 212.48 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Additional map: Sharpned map by DeepEMhancer

Fileemd_41968_additional_1.map
AnnotationSharpned map by DeepEMhancer
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #2

Fileemd_41968_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #1

Fileemd_41968_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Sample components

-
Entire : Toxin co-regulated pilus

EntireName: Toxin co-regulated pilus
Components
  • Complex: Toxin co-regulated pilus
    • Protein or peptide: Toxin coregulated pilin

-
Supramolecule #1: Toxin co-regulated pilus

SupramoleculeName: Toxin co-regulated pilus / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Vibrio cholerae (bacteria)

-
Macromolecule #1: Toxin coregulated pilin

MacromoleculeName: Toxin coregulated pilin / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Vibrio cholerae (bacteria)
Molecular weightTheoretical: 20.342275 KDa
SequenceString: MTLLEVIIVL GIMGVVSAGV VTLAQRAIDS QIMTKAAQSL NSIQVALTQT YRGLGNYPAT ADATAASKLT SGLVSLGKIS SDEAKNPFN GTNMNIFSFP RNAAANKAFA ISVDGLTQAQ CKTLITSVGD MFPYIAIKAG GAVALADLGD FENSAAAAET G VGVIKSIA ...String:
MTLLEVIIVL GIMGVVSAGV VTLAQRAIDS QIMTKAAQSL NSIQVALTQT YRGLGNYPAT ADATAASKLT SGLVSLGKIS SDEAKNPFN GTNMNIFSFP RNAAANKAFA ISVDGLTQAQ CKTLITSVGD MFPYIAIKAG GAVALADLGD FENSAAAAET G VGVIKSIA PASKNLDLTN ITHVEKLCKG TAPFGVAFGN S

UniProtKB: Toxin coregulated pilin

-
Experimental details

-
Structure determination

Methodcryo EM
Processinghelical reconstruction
Aggregation statefilament

-
Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.2 µm
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

-
Image processing

Startup modelType of model: NONE
Final angle assignmentType: NOT APPLICABLE
Final reconstructionApplied symmetry - Helical parameters - Δz: 8.306 Å
Applied symmetry - Helical parameters - Δ&Phi: 96.98 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Resolution.type: BY AUTHOR / Resolution: 4.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 33045
FSC plot (resolution estimation)

+
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