6J0F

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


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.8 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: SINGLE PARTICLE 

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:  

  • 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.,State Key Laboratory of Membrane Biology, Peking-Tsinghua Center for Life Sciences, School of Life Sciences, Peking University, Beijing, PRC; Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, PRC.,State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, PRC.,State Key Laboratory of Membrane Biology, Peking-Tsinghua Center for Life Sciences, School of Life Sciences, Peking University, Beijing, PRC.,Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, PRC.,NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, PRC. Electronic address: jinqi@ipbcams.ac.cn.,NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, PRC.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pvc16
A, B, C, D, E, F
293Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)Mutation(s): 0 
Find proteins for B6VNM9 (Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77))
Go to UniProtKB:  B6VNM9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Pvc1
a, b, c, d, e, f
149Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77)Mutation(s): 0 
Find proteins for B6VNP4 (Photorhabdus asymbiotica subsp. asymbiotica (strain ATCC 43949 / 3105-77))
Go to UniProtKB:  B6VNP4
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.8 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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