+
Open data
-
Basic information
Entry | Database: PDB / ID: 9ddo | ||||||
---|---|---|---|---|---|---|---|
Title | E. coli TonB-ExbBD TonB bound to ExbB chain C | ||||||
![]() |
| ||||||
![]() | TRANSPORT PROTEIN / Ton system | ||||||
Function / homology | ![]() receptor-mediated bacteriophage irreversible attachment to host cell / colicin transport / ferrichrome import into cell / energy transducer activity / bacteriocin transport / cobalamin transport / siderophore transport / intracellular monoatomic cation homeostasis / transmembrane transporter complex / plasma membrane protein complex ...receptor-mediated bacteriophage irreversible attachment to host cell / colicin transport / ferrichrome import into cell / energy transducer activity / bacteriocin transport / cobalamin transport / siderophore transport / intracellular monoatomic cation homeostasis / transmembrane transporter complex / plasma membrane protein complex / protein import / cell envelope / transmembrane transporter activity / cell outer membrane / transmembrane transport / protein transport / outer membrane-bounded periplasmic space / intracellular iron ion homeostasis / protein stabilization / protein domain specific binding / protein homodimerization activity / identical protein binding / membrane / plasma membrane Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å | ||||||
![]() | Celia, H. / Botos, I. | ||||||
Funding support | ![]()
| ||||||
![]() | ![]() Title: Cryo-EM structures of the E. coli Ton and Tol motor complexes. Authors: Herve Celia / Istvan Botos / Rodolfo Ghirlando / Denis Duché / Bridgette M Beach / Roland Lloubes / Susan K Buchanan / ![]() ![]() Abstract: The Ton and Tol motor proteins use the proton gradient at the inner membrane of Gram-negative bacteria as an energy source. The generated force is transmitted through the periplasmic space to protein ...The Ton and Tol motor proteins use the proton gradient at the inner membrane of Gram-negative bacteria as an energy source. The generated force is transmitted through the periplasmic space to protein components associated with the outer membrane, either to maintain the outer membrane integrity for the Tol system, or to allow essential nutrients to enter the cell for Ton. We have solved the high-resolution structures of the E. coli TonB-ExbB-ExbD and TolA-TolQ-TolR complexes, revealing the inner membrane embedded engine parts of the Ton and Tol systems, and showing how TonB and TolA interact with the ExbBD and TolQR subcomplexes. Structural similarities between the two motor complexes suggest a common mechanism for the opening of the proton channel and the propagation of the proton motive force into movement of the TonB and TolA subunits. Because TonB and TolA bind at preferential ExbB or TolQ subunits, we propose a new mechanism of assembly of TonB and TolA with their respective ExbBD and TolQR subcomplexes and discuss its impact on the mechanism of action for the Ton and Tol systems. | ||||||
History |
|
-
Structure visualization
Structure viewer | Molecule: ![]() ![]() |
---|
-
Downloads & links
-
Download
PDBx/mmCIF format | ![]() | 242.6 KB | Display | ![]() |
---|---|---|---|---|
PDB format | ![]() | 190.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.5 MB | Display | ![]() |
---|---|---|---|---|
Full document | ![]() | 1.5 MB | Display | |
Data in XML | ![]() | 44 KB | Display | |
Data in CIF | ![]() | 67.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 46778MC ![]() 9ddmC ![]() 9ddnC ![]() 9ddpC ![]() 9ddqC M: map data used to model this data C: citing same article ( |
---|---|
Similar structure data | Similarity search - Function & homology ![]() |
-
Links
-
Assembly
Deposited unit | ![]()
|
---|---|
1 |
|
-
Components
#1: Protein | Mass: 26312.322 Da / Num. of mol.: 5 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #2: Protein | | Mass: 28495.709 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #3: Protein | Mass: 18161.674 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #4: Chemical | Has ligand of interest | Y | Has protein modification | N | |
---|
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
---|---|
EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-
Sample preparation
Component | Name: TonB-ExbBD complex / Type: COMPLEX / Details: TonB bound to ExbB chainC / Entity ID: #1-#3 / Source: RECOMBINANT |
---|---|
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid type: Quantifoil R1.2/1.3 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 278 K |
-
Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
---|---|
Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2800 nm / Nominal defocus min: 800 nm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 69.9 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
-
Processing
EM software | Name: PHENIX / Version: 1.21rc1_5084: / Category: model refinement | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 227584 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT / Space: REAL | ||||||||||||||||||||||||
Refine LS restraints |
|