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@ARTICLE{Bollinger:873889,
author = {Bollinger, Alexander and Thies, Stephan and
Knieps-Grünhagen, Esther and Gertzen, Christoph and Kobus,
Stefanie and Höppner, Astrid and Ferrer, Manuel and Gohlke,
Holger and Smits, Sander H. J. and Jaeger, Karl-Erich},
title = {{A} {N}ovel {P}olyester {H}ydrolase {F}rom the {M}arine
{B}acterium {P}seudomonas aestusnigri – {S}tructural and
{F}unctional {I}nsights},
journal = {Frontiers in microbiology},
volume = {11},
issn = {1664-302X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2020-01079},
pages = {114},
year = {2020},
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
VGXO14T. 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.},
cin = {IMET},
ddc = {570},
cid = {I:(DE-Juel1)IMET-20090612},
pnm = {581 - Biotechnology (POF3-581) / DFG project 417919780 -
Zentrum für strukturelle Studien},
pid = {G:(DE-HGF)POF3-581 / G:(GEPRIS)417919780},
typ = {PUB:(DE-HGF)16},
pubmed = {32117139},
UT = {WOS:000517512900001},
doi = {10.3389/fmicb.2020.00114},
url = {https://juser.fz-juelich.de/record/873889},
}