6SBN

Polyester hydrolase PE-H of Pseudomonas aestusnigri


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.09 Å
  • R-Value Free: 0.137 
  • R-Value Work: 0.107 
  • R-Value Observed: 0.107 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A Novel Polyester Hydrolase From the Marine BacteriumPseudomonas aestusnigri -Structural and Functional Insights.

Bollinger, A.Thies, S.Knieps-Grunhagen, E.Gertzen, C.Kobus, S.Hoppner, A.Ferrer, M.Gohlke, H.Smits, S.H.J.Jaeger, K.E.

(2020) Front Microbiol 11: 114-114

  • DOI: https://doi.org/10.3389/fmicb.2020.00114
  • Primary Citation of Related Structures:  
    6SBN, 6SCD

  • PubMed Abstract: 

    Biodegradation of synthetic polymers, in particular polyethylene terephthalate (PET), is of great importance, since environmental pollution with PET and other plastics has become a severe global problem. Here, we report on the polyester degrading ability of a novel carboxylic ester hydrolase identified in the genome of the marine hydrocarbonoclastic bacterium Pseudomonas aestusnigri VGXO14 T . The enzyme, designated PE-H, belongs to the type IIa family of PET hydrolytic enzymes as indicated by amino acid sequence homology. It was produced in Escherichia coli , purified and its crystal structure was solved at 1.09 Å resolution representing the first structure of a type IIa PET hydrolytic enzyme. The structure shows a typical α/β-hydrolase fold and high structural homology to known polyester hydrolases. PET hydrolysis was detected at 30°C with amorphous PET film (PETa), but not with PET film from a commercial PET bottle (PETb). A rational mutagenesis study to improve the PET degrading potential of PE-H yielded variant PE-H (Y250S) which showed improved activity, ultimately also allowing the hydrolysis of PETb. The crystal structure of this variant solved at 1.35 Å resolution allowed to rationalize the improvement of enzymatic activity. A PET oligomer binding model was proposed by molecular docking computations. Our results indicate a significant potential of the marine bacterium P. aestusnigri for PET degradation.


  • Organizational Affiliation

    Institute of Molecular Enzyme Technology, Heinrich Heine University Düsseldorf, Jülich, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
polyester hydrolase312Halopseudomonas aestusnigriMutation(s): 0 
Gene Names: B7O88_11480
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.09 Å
  • R-Value Free: 0.137 
  • R-Value Work: 0.107 
  • R-Value Observed: 0.107 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.814α = 90
b = 80.014β = 90
c = 88.912γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-26
    Type: Initial release
  • Version 1.1: 2020-03-11
    Changes: Database references