1V1O

staphylococcal superantigen-like protein 7


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Relationships and Cellular Tropism of Staphylococcal Superantigen-Like Proteins

Al-Shangiti, A.M.Naylor, C.E.Nair, S.P.Briggs, D.C.Henderson, B.Chain, B.

(2004) Infect Immun 72: 4261

  • DOI: 10.1128/IAI.72.7.4261-4270.2004
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The staphylococcal superantigen-like proteins (SSLs) are a family of polymorphic paralogs encoded in the Staphylococcus aureus genome whose function is unknown. The crystal structure of SSL7 was determined and compared to that of SSL5 and that of a c ...

    The staphylococcal superantigen-like proteins (SSLs) are a family of polymorphic paralogs encoded in the Staphylococcus aureus genome whose function is unknown. The crystal structure of SSL7 was determined and compared to that of SSL5 and that of a classical superantigen, streptococcal pyrogenic exotoxin. Although the overall architecture of the superantigen family is retained in both SSL7 and SSL5, there are significant differences in the structures which suggest that the characteristic major histocompatibility complex binding site of superantigens has been lost. To complement these data, the abilities of SSL7 and a closely related paralog, SSL9, to interact with cells of the immune system were investigated. In populations of human white blood cells, both SSLs interacted selectively with monocytes via specific saturable but separate binding sites, which led to rapid uptake of the SSLs. In addition, SSLs were rapidly taken up by dendritic cells, but not by macrophages, into the same endosomal compartment as dextran. The ability of these secreted proteins to target antigen-presenting cells may enhance a misplaced antibody response against the proteins, which may facilitate bacterial colonization rather than contribute to host protection. Like classical superantigens, therefore, SSLs may distract the host's immune system, but they may do so via entirely different molecular mechanisms.


    Organizational Affiliation

    Department of Immunology and Molecular Pathology, University College London, 46 Cleveland Street, London W1T 4JF, United Kingdom.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EXOTOXIN 1A, B213Staphylococcus aureusMutation(s): 0 
Gene Names: set1ERS072840_02173GO677_07815NCTC7878_00468SAMEA1469884_02088SAMEA1531680_02028SAMEA1531701_02284SAST44_00437SAST45_00443
Find proteins for Q9ZFS5 (Staphylococcus aureus)
Explore Q9ZFS5 
Go to UniProtKB:  Q9ZFS5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.213 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.66α = 90
b = 81.66β = 90
c = 148.04γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-07-01
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-02-07
    Changes: Source and taxonomy