6J0B

Cryo-EM Structure of an Extracellular Contractile Injection System, PVC sheath-tube complex in extended state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cryo-EM Structure and Assembly of an Extracellular Contractile Injection System.

Jiang, F.Li, N.Wang, X.Cheng, J.Huang, Y.Yang, Y.Yang, J.Cai, B.Wang, Y.P.Jin, Q.Gao, N.

(2019) Cell 177: 370-383.e15

  • DOI: 10.1016/j.cell.2019.02.020
  • Primary Citation of Related Structures:  
    6J0M, 6J0N, 6J0F, 6J0C, 6J0B

  • PubMed Abstract: 
  • Contractile injection systems (CISs) are cell-puncturing nanodevices that share ancestry with contractile tail bacteriophages. Photorhabdus virulence cassette (PVC) represents one group of extracellular CISs that are present in both bacteria and arch ...

    Contractile injection systems (CISs) are cell-puncturing nanodevices that share ancestry with contractile tail bacteriophages. Photorhabdus virulence cassette (PVC) represents one group of extracellular CISs that are present in both bacteria and archaea. Here, we report the cryo-EM structure of an intact PVC from P. asymbiotica. This over 10-MDa device resembles a simplified T4 phage tail, containing a hexagonal baseplate complex with six fibers and a capped 117-nanometer sheath-tube trunk. One distinct feature of the PVC is the presence of three variants for both tube and sheath proteins, indicating a functional specialization of them during evolution. The terminal hexameric cap docks onto the topmost layer of the inner tube and locks the outer sheath in pre-contraction state with six stretching arms. Our results on the PVC provide a framework for understanding the general mechanism of widespread CISs and pave the way for using them as delivery tools in biological or therapeutic applications.


    Organizational Affiliation

    State Key Laboratory of Membrane Biology, Peking-Tsinghua Center for Life Sciences, School of Life Sciences, Peking University, Beijing, PRC. Electronic address: gaon@pku.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Pvc2A, B, C, D, E, F, G, H, I, J, K, L355Photorhabdus asymbiotica subsp. asymbiotica ATCC 43949Mutation(s): 0 
Gene Names: PAU_03352PA-RVA20-21-0170
Find proteins for B6VNP3 (Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77))
Explore B6VNP3 
Go to UniProtKB:  B6VNP3
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Pvc1a, b, c, d, e, f, g, h, i, j, k, l149Photorhabdus asymbiotica subsp. asymbiotica ATCC 43949Mutation(s): 0 
Gene Names: PAU_03353PA-RVA20-21-0171
Find proteins for B6VNP4 (Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77))
Explore B6VNP4 
Go to UniProtKB:  B6VNP4
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-04-10
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Data collection, Database references