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: 3.70 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:  
    6B0X, 6B23

  • PubMed Abstract: 

    • 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 ...

    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: 

    Department of Microbiology, University of Alabama, Birmingham, United States.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Major head proteinA,
D [auth B],
E [auth C],
G [auth D]		324Staphylococcus virus 80alphaMutation(s): 0 
Gene Names: orf47
UniProt
Find proteins for A4ZFB3 (Staphylococcus virus 80alpha)
Explore A4ZFB3 
Go to UniProtKB:  A4ZFB3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA4ZFB3
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Capsid morphogenesis B proteinB [auth a],
C [auth b],
F [auth c],
H [auth d]		72Staphylococcus aureusMutation(s): 0 
Gene Names: 
UniProt
Find proteins for O54465 (Staphylococcus aureus)
Explore O54465 
Go to UniProtKB:  O54465
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO54465
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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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  (Full details and data files)

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