4M00

Crystal structure of the ligand binding region of staphylococcal adhesion SraP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural Insights into SraP-Mediated Staphylococcus aureus Adhesion to Host Cells

Yang, Y.H.Jiang, Y.L.Zhang, J.Wang, L.Bai, X.H.Zhang, S.J.Ren, Y.M.Li, N.Zhang, Y.H.Zhang, Z.Gong, Q.Mei, Y.Xue, T.Zhang, J.R.Chen, Y.Zhou, C.Z.

(2014) Plos Pathog. 10: e1004169-e1004169

  • DOI: 10.1371/journal.ppat.1004169
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Staphylococcus aureus, a Gram-positive bacterium causes a number of devastating human diseases, such as infective endocarditis, osteomyelitis, septic arthritis and sepsis. S. aureus SraP, a surface-exposed serine-rich repeat glycoprotein (SRRP), is r ...

    Staphylococcus aureus, a Gram-positive bacterium causes a number of devastating human diseases, such as infective endocarditis, osteomyelitis, septic arthritis and sepsis. S. aureus SraP, a surface-exposed serine-rich repeat glycoprotein (SRRP), is required for the pathogenesis of human infective endocarditis via its ligand-binding region (BR) adhering to human platelets. It remains unclear how SraP interacts with human host. Here we report the 2.05 Å crystal structure of the BR of SraP, revealing an extended rod-like architecture of four discrete modules. The N-terminal legume lectin-like module specifically binds to N-acetylneuraminic acid. The second module adopts a β-grasp fold similar to Ig-binding proteins, whereas the last two tandem repetitive modules resemble eukaryotic cadherins but differ in calcium coordination pattern. Under the conditions tested, small-angle X-ray scattering and molecular dynamic simulation indicated that the three C-terminal modules function as a relatively rigid stem to extend the N-terminal lectin module outwards. Structure-guided mutagenesis analyses, in addition to a recently identified trisaccharide ligand of SraP, enabled us to elucidate that SraP binding to sialylated receptors promotes S. aureus adhesion to and invasion into host epithelial cells. Our findings have thus provided novel structural and functional insights into the SraP-mediated host-pathogen interaction of S. aureus.


    Organizational Affiliation

    Hefei National Laboratory for Physical Sciences at the Microscale and School of Life Sciences, University of Science and Technology of China, Hefei Anhui, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine-rich adhesin for platelets
A
541Staphylococcus aureus (strain NCTC 8325)Mutation(s): 0 
Gene Names: sraP (sasA)
Find proteins for Q2FUW1 (Staphylococcus aureus (strain NCTC 8325))
Go to UniProtKB:  Q2FUW1
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SUC
Query on SUC

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Download CCD File 
A
SUCROSE
C12 H22 O11
CZMRCDWAGMRECN-UGDNZRGBSA-N
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

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Download CCD File 
A
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.181 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 118.018α = 90.00
b = 118.018β = 90.00
c = 136.407γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
SCALAdata scaling
HKL-2000data reduction
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-06-18
    Type: Initial release