6QGC

PETase from Ideonella sakaiensis without ligand


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.216 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the plastic-degrading Ideonella sakaiensis MHETase bound to a substrate.

Palm, G.J.Reisky, L.Bottcher, D.Muller, H.Michels, E.A.P.Walczak, M.C.Berndt, L.Weiss, M.S.Bornscheuer, U.T.Weber, G.

(2019) Nat Commun 10: 1717-1717

  • DOI: https://doi.org/10.1038/s41467-019-09326-3
  • Primary Citation of Related Structures:  
    6QG9, 6QGA, 6QGB, 6QGC

  • PubMed Abstract: 

    The extreme durability of polyethylene terephthalate (PET) debris has rendered it a long-term environmental burden. At the same time, current recycling efforts still lack sustainability. Two recently discovered bacterial enzymes that specifically degrade PET represent a promising solution. First, Ideonella sakaiensis PETase, a structurally well-characterized consensus α/β-hydrolase fold enzyme, converts PET to mono-(2-hydroxyethyl) terephthalate (MHET). MHETase, the second key enzyme, hydrolyzes MHET to the PET educts terephthalate and ethylene glycol. Here, we report the crystal structures of active ligand-free MHETase and MHETase bound to a nonhydrolyzable MHET analog. MHETase, which is reminiscent of feruloyl esterases, possesses a classic α/β-hydrolase domain and a lid domain conferring substrate specificity. In the light of structure-based mapping of the active site, activity assays, mutagenesis studies and a first structure-guided alteration of substrate specificity towards bis-(2-hydroxyethyl) terephthalate (BHET) reported here, we anticipate MHETase to be a valuable resource to further advance enzymatic plastic degradation.


  • Organizational Affiliation

    Molecular Structural Biology, University of Greifswald, Felix-Hausdorff-Str. 4, 17487, Greifswald, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Poly(ethylene terephthalate) hydrolase
A, B, C, D
290Piscinibacter sakaiensisMutation(s): 0 
Gene Names: ISF6_4831
EC: 3.1.1.101
UniProt
Find proteins for A0A0K8P6T7 (Piscinibacter sakaiensis)
Explore A0A0K8P6T7 
Go to UniProtKB:  A0A0K8P6T7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0K8P6T7
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.121α = 90
b = 78.769β = 92.56
c = 140.121γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-03
    Type: Initial release
  • Version 1.1: 2019-04-24
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description