4DZ1

Crystal structure of DalS, an ATP binding cassette transporter for D-alanine from Salmonella enterica


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Characterization of DalS, an ATP-binding Cassette Transporter for D-Alanine, and Its Role in Pathogenesis in Salmonella enterica.

Osborne, S.E.Tuinema, B.R.Mok, M.C.Lau, P.S.Bui, N.K.Tomljenovic-Berube, A.M.Vollmer, W.Zhang, K.Junop, M.Coombes, B.K.

(2012) J.Biol.Chem. 287: 15242-15250

  • DOI: 10.1074/jbc.M112.348227

  • PubMed Abstract: 
  • Expansion into new host niches requires bacterial pathogens to adapt to changes in nutrient availability and to evade an arsenal of host defenses. Horizontal acquisition of Salmonella Pathogenicity Island (SPI)-2 permitted the expansion of Salmonella ...

    Expansion into new host niches requires bacterial pathogens to adapt to changes in nutrient availability and to evade an arsenal of host defenses. Horizontal acquisition of Salmonella Pathogenicity Island (SPI)-2 permitted the expansion of Salmonella enterica serovar Typhimurium into the intracellular environment of host cells by allowing it to deliver bacterial effector proteins across the phagosome membrane. This is facilitated by the SsrA-SsrB two-component regulatory system and a type III secretion system encoded within SPI-2. SPI-2 acquisition was followed by evolution of existing regulatory DNA, creating an expanded SsrB regulon involved in intracellular fitness and host infection. Here, we identified an SsrB-regulated operon comprising an ABC transporter in Salmonella. Biochemical and structural studies determined that the periplasmic solute-binding component, STM1633/DalS, transports D-alanine and that DalS is required for intracellular survival of the bacteria and for fitness in an animal host. This work exemplifies the role of nutrient exchange at the host-pathogen interface as a critical determinant of disease outcome.


    Organizational Affiliation

    Michael G. DeGroote Institute for Infectious Disease Research, Hamilton, Ontario, L8N 3Z5, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DalS D-Alanine transporter
A
259N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DAL
Query on DAL

Download SDF File 
Download CCD File 
A
D-ALANINE
C3 H7 N O2
QNAYBMKLOCPYGJ-UWTATZPHSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.190 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 81.076α = 90.00
b = 81.076β = 90.00
c = 187.926γ = 120.00
Software Package:
Software NamePurpose
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
PHENIXphasing
HKL-2000data collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-02-29 
  • Released Date: 2012-03-21 
  • Deposition Author(s): Mok, M., Junop, M.

Revision History 

  • Version 1.0: 2012-03-21
    Type: Initial release
  • Version 1.1: 2012-03-28
    Type: Database references
  • Version 1.2: 2012-05-23
    Type: Database references