2YHE

Structure determination of the stereoselective inverting sec- alkylsulfatase Pisa1 from Pseudomonas sp.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

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This is version 1.2 of the entry. See complete history


Literature

Structure and Mechanism of an Inverting Alkylsulfatase from Pseudomonas Sp. Dsm6611 Specific for Secondary Alkylsulfates.

Knaus, T.Schober, M.Kepplinger, B.Faccinelli, M.Pitzer, J.Faber, K.Macheroux, P.Wagner, U.

(2012) FEBS J 279: 4374

  • DOI: 10.1111/febs.12027
  • Primary Citation of Related Structures:  
    4AV7, 4AXH, 2YHE

  • PubMed Abstract: 
  • A highly enantioselective and stereoselective secondary alkylsulfatase from Pseudomonas sp. DSM6611 (Pisa1) was heterologously expressed in Escherichia coli BL21, and purified to homogeneity for kinetic and structural studies. Structure determination of Pisa1 by X-ray crystallography showed that the protein belongs to the family of metallo-β-lactamases with a conserved binuclear Zn(2+) cluster in the active site ...

    A highly enantioselective and stereoselective secondary alkylsulfatase from Pseudomonas sp. DSM6611 (Pisa1) was heterologously expressed in Escherichia coli BL21, and purified to homogeneity for kinetic and structural studies. Structure determination of Pisa1 by X-ray crystallography showed that the protein belongs to the family of metallo-β-lactamases with a conserved binuclear Zn(2+) cluster in the active site. In contrast to a closely related alkylsulfatase from Pseudomonas aeruginosa (SdsA1), Pisa1 showed a preference for secondary rather than primary alkyl sulfates, and enantioselectively hydrolyzed the (R)-enantiomer of rac-2-octyl sulfate, yielding (S)-2-octanol with inversion of absolute configuration as a result of C-O bond cleavage. In order to elucidate the mechanism of inverting sulfate ester hydrolysis, for which no counterpart in chemical catalysis exists, we designed variants of Pisa1 guided by three-dimensional structure and docking experiments. In the course of these studies, we identified an invariant histidine (His317) near the sulfate-binding site as the general acid for crucial protonation of the sulfate leaving group. Additionally, amino acid replacements in the alkyl chain-binding pocket generated an enzyme variant that lost its stereoselectivity towards rac-2-octyl sulfate. These findings are discussed in light of the potential use of this enzyme family for applications in biocatalysis.


    Organizational Affiliation

    Institute of Biochemistry, Graz University of Technology, Graz, Austria.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SEC-ALKYL SULFATASE ABCDEF668Pseudomonas sp. DSM 6611Mutation(s): 0 
Gene Names: pisa1
Find proteins for F8KAY7 (Pseudomonas sp. DSM 6611)
Explore F8KAY7 
Go to UniProtKB:  F8KAY7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.734α = 90
b = 200.587β = 90
c = 245.332γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-05-16
    Type: Initial release
  • Version 1.1: 2012-12-05
    Changes: Database references, Other, Source and taxonomy
  • Version 1.2: 2019-07-17
    Changes: Data collection