3PYW

The structure of the SLH domain from B. anthracis surface array protein at 1.8A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of Surface Layer Homology (SLH) Domains from Bacillus anthracis Surface Array Protein.

Kern, J.Wilton, R.Zhang, R.Binkowski, T.A.Joachimiak, A.Schneewind, O.

(2011) J.Biol.Chem. 286: 26042-26049

  • DOI: 10.1074/jbc.M111.248070

  • PubMed Abstract: 
  • Surface (S)-layers, para-crystalline arrays of protein, are deposited in the envelope of most bacterial species. These surface organelles are retained in the bacterial envelope through the non-covalent association of proteins with cell wall carbohydr ...

    Surface (S)-layers, para-crystalline arrays of protein, are deposited in the envelope of most bacterial species. These surface organelles are retained in the bacterial envelope through the non-covalent association of proteins with cell wall carbohydrates. Bacillus anthracis, a Gram-positive pathogen, produces S-layers of the protein Sap, which uses three consecutive repeats of the surface-layer homology (SLH) domain to engage secondary cell wall polysaccharides (SCWP). Using x-ray crystallography, we reveal here the structure of these SLH domains, which assume the shape of a three-prong spindle. Each SLH domain contributes to a three-helical bundle at the spindle base, whereas another α-helix and its connecting loops generate the three prongs. The inter-prong grooves contain conserved cationic and anionic residues, which are necessary for SLH domains to bind the B. anthracis SCWP. Modeling experiments suggest that the SLH domains of other S-layer proteins also fold into three-prong spindles and capture bacterial envelope carbohydrates by a similar mechanism.


    Organizational Affiliation

    Department of Microbiology, University of Chicago, Chicago, Illinois 60637, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
S-layer protein sap
A
203Bacillus anthracisMutation(s): 0 
Gene Names: sap
Find proteins for P49051 (Bacillus anthracis)
Go to UniProtKB:  P49051
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.166 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 77.767α = 90.00
b = 77.767β = 90.00
c = 100.408γ = 90.00
Software Package:
Software NamePurpose
HKL-3000phasing
HKL-3000data scaling
REFMACrefinement
SBC-Collectdata collection
HKL-3000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-08-03
    Type: Database references
  • Version 1.3: 2012-08-08
    Type: Other