6B23

Capsid protein and C-terminal part of CpmB protein in the Staphylococcus aureus pathogenicity island 1 80alpha-derived procapsid


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Competing scaffolding proteins determine capsid size during mobilization ofStaphylococcus aureuspathogenicity islands.

Dearborn, A.D.Wall, E.A.Kizziah, J.L.Klenow, L.Parker, L.K.Manning, K.A.Spilman, M.S.Spear, J.M.Christie, G.E.Dokland, T.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.30822
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • <i>Staphylococcus aureus </i> pathogenicity islands (SaPIs), such as SaPI1, exploit specific helper bacteriophages, like 80α, for their high frequency mobilization, a process termed 'molecular piracy'. SaPI1 redirects the helper's assembly pathway t ...

    Staphylococcus aureus pathogenicity islands (SaPIs), such as SaPI1, exploit specific helper bacteriophages, like 80α, for their high frequency mobilization, a process termed 'molecular piracy'. SaPI1 redirects the helper's assembly pathway to form small capsids that can only accommodate the smaller SaPI1 genome, but not a complete phage genome. SaPI1 encodes two proteins, CpmA and CpmB, that are responsible for this size redirection. We have determined the structures of the 80α and SaPI1 procapsids to near-atomic resolution by cryo-electron microscopy, and show that CpmB competes with the 80α scaffolding protein (SP) for a binding site on the capsid protein (CP), and works by altering the angle between capsomers. We probed these interactions genetically and identified second-site suppressors of lethal mutations in SP. Our structures show, for the first time, the detailed interactions between SP and CP in a bacteriophage, providing unique insights into macromolecular assembly processes.


    Organizational Affiliation

    Direct Electron, San Diego, United States.,Biological Science Imaging Resource, Florida State University, Tallahassee, United States.,Protein Expression Laboratory, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States.,Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, United States.,Department of Microbiology, University of Alabama, Birmingham, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Major head protein
A, B, C, D
324Staphylococcus virus 80alphaMutation(s): 0 
Find proteins for A4ZFB3 (Staphylococcus virus 80alpha)
Go to UniProtKB:  A4ZFB3
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Capsid morphogenesis B protein
a, b, c, d
72Staphylococcus aureusMutation(s): 0 
Find proteins for O54465 (Staphylococcus aureus)
Go to UniProtKB:  O54465
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01 AI083255

Revision History 

  • Version 1.0: 2017-10-18
    Type: Initial release
  • Version 1.1: 2018-02-28
    Type: Database references, Structure summary
  • Version 1.2: 2018-03-28
    Type: Data collection, Database references
  • Version 1.3: 2019-12-11
    Type: Author supporting evidence