Arylsulfatase from Pseudomonas aeruginosa

Experimental Data Snapshot

  • Resolution: 1.30 Å
  • R-Value Free: 0.229 
  • R-Value Observed: 0.199 

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This is version 2.4 of the entry. See complete history


1.3 A Structure of Arylsulfatase from Pseudomonas Aeruginosa Establishes the Catalytic Mechanism of Sulfate Ester Cleavage in the Sulfatase Family.

Boltes, I.Czapinska, H.Kahnert, A.von Buelow, R.Dirks, T.Schmidt, B.von Figura, K.Kertesz, M.A.Uson, I.

(2001) Structure 9: 483-491

  • DOI: https://doi.org/10.1016/s0969-2126(01)00609-8
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Sulfatases constitute a family of enzymes with a highly conserved active site region including a Calpha-formylglycine that is posttranslationally generated by the oxidation of a conserved cysteine or serine residue. The crystal structures of two human arylsulfatases, ASA and ASB, along with ASA mutants and their complexes led to different proposals for the catalytic mechanism in the hydrolysis of sulfate esters. The crystal structure of a bacterial sulfatase from Pseudomonas aeruginosa (PAS) has been determined at 1.3 A. Fold and active site region are strikingly similar to those of the known human sulfatases. The structure allows a precise determination of the active site region, unequivocally showing the presence of a Calpha-formylglycine hydrate as the key catalytic residue. Furthermore, the cation located in the active site is unambiguously characterized as calcium by both its B value and the geometry of its coordination sphere. The active site contains a noncovalently bonded sulfate that occupies the same position as the one in para-nitrocatecholsulfate in previously studied ASA complexes. The structure of PAS shows that the resting state of the key catalytic residue in sulfatases is a formylglycine hydrate. These structural data establish a mechanism for sulfate ester cleavage involving an aldehyde hydrate as the functional group that initiates the reaction through a nucleophilic attack on the sulfur atom in the substrate. The alcohol is eliminated from a reaction intermediate containing pentacoordinated sulfur. Subsequent elimination of the sulfate regenerates the aldehyde, which is again hydrated. The metal cation involved in stabilizing the charge and anchoring the substrate during catalysis is established as calcium.

  • Organizational Affiliation

    Lehrstuhl für Strukturchemie, Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077, Göttingen, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
536Pseudomonas aeruginosaMutation(s): 0 
Gene Names: atsAPA0183
Find proteins for P51691 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore P51691 
Go to UniProtKB:  P51691
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP51691
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on SO4

Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
G [auth A]
I [auth B]
D [auth A],
E [auth A],
F [auth A],
G [auth A],
I [auth B],
J [auth B],
K [auth B],
L [auth B]
O4 S
Query on CA

Download Ideal Coordinates CCD File 
C [auth A],
H [auth B]
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on DDZ
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 1.30 Å
  • R-Value Free: 0.229 
  • R-Value Observed: 0.199 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 188.92α = 90
b = 67.29β = 94.2
c = 89.7γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-11-15
    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: 2018-06-13
    Changes: Data collection, Database references, Derived calculations, Source and taxonomy, Structure summary
  • Version 2.0: 2019-04-24
    Changes: Data collection, Derived calculations, Polymer sequence
  • Version 2.1: 2019-05-08
    Changes: Data collection, Experimental preparation
  • Version 2.2: 2019-05-22
    Changes: Data collection, Refinement description
  • Version 2.3: 2019-07-10
    Changes: Data collection
  • Version 2.4: 2019-07-24
    Changes: Data collection