Crystal structure of SdsA1, an alkylsulfatase from Pseudomonas aeruginosa, in complex with 1-decane-sulfonic-acid.

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.174 

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The Crystal Structure of Sdsa1, an Alkylsulfatase from Pseudomonas Aeruginosa, Defines a Third Class of Sulfatases.

Hagelueken, G.Adams, T.M.Wiehlmann, L.Widow, U.Kolmar, H.Tummler, B.Heinz, D.W.Schubert, W.-D.

(2006) Proc Natl Acad Sci U S A 103: 7631

  • DOI: https://doi.org/10.1073/pnas.0510501103
  • Primary Citation of Related Structures:  
    2CFU, 2CFZ, 2CG2, 2CG3

  • PubMed Abstract: 

    Pseudomonas aeruginosa is both a ubiquitous environmental bacterium and an opportunistic human pathogen. A remarkable metabolic versatility allows it to occupy a multitude of ecological niches, including wastewater treatment plants and such hostile environments as the human respiratory tract. P. aeruginosa is able to degrade and metabolize biocidic SDS, the detergent of most commercial personal hygiene products. We identify SdsA1 of P. aeruginosa as a secreted SDS hydrolase that allows the bacterium to use primary sulfates such as SDS as a sole carbon or sulfur source. Homologues of SdsA1 are found in many pathogenic and some nonpathogenic bacteria. The crystal structure of SdsA1 reveals three distinct domains. The N-terminal catalytic domain with a binuclear Zn2+ cluster is a distinct member of the metallo-beta-lactamase fold family, the central dimerization domain ensures resistance to high concentrations of SDS, whereas the C-terminal domain provides a hydrophobic groove, presumably to recruit long aliphatic substrates. Crystal structures of apo-SdsA1 and complexes with substrate analog and products indicate an enzymatic mechanism involving a water molecule indirectly activated by the Zn2+ cluster. The enzyme SdsA1 thus represents a previously undescribed class of sulfatases that allows P. aeruginosa to survive and thrive under otherwise bacteriocidal conditions.

  • Organizational Affiliation

    Division of Structural Biology, German Research Centre for Biotechnology, Mascheroder Weg 1, D-38124 Braunschweig, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SDSA1658Pseudomonas aeruginosa PAO1Mutation(s): 0 
Membrane Entity: Yes 
Find proteins for Q9I5I9 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I5I9 
Go to UniProtKB:  Q9I5I9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9I5I9
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 1DB

Download Ideal Coordinates CCD File 
C10 H22 O3 S
Query on PEG

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C [auth A]
D [auth A]
E [auth A]
F [auth A]
G [auth A]
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A]
C4 H10 O3
Query on ZN

Download Ideal Coordinates CCD File 
L [auth A],
M [auth A]
Query on IPA

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C3 H8 O
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.174 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.057α = 90
b = 86.057β = 90
c = 364.413γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-04-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2011-09-28
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description