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@ARTICLE{Weiler:906277,
author = {Weiler, Andrea J. and Spitz, Olivia and Gudzuhn, Mirja and
Schott, Stephan and Kamel, Michael and Thiele, Björn and
Streit, Wolfgang R. and Kedrov, Alexej and Schmitt, Lutz and
Gohlke, Holger and Kovacic, Filip},
title = {{A} phospholipase {B} from {P}seudomonas aeruginosa with
activity towards endogenous phospholipids affects biofilm
assembly},
journal = {Biochimica et biophysica acta / Molecular and cell biology
of lipids},
volume = {1867},
number = {4},
issn = {1388-1981},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {FZJ-2022-01341},
pages = {159101 -},
year = {2022},
abstract = {Pseudomonas aeruginosa is a severe threat to
immunocompromised patients due to its numerous virulence
factors and biofilm-mediated multidrug resistance. It
produces and secretes various toxins with hydrolytic
activities including phospholipases. However, the function
of intracellular phospholipases for bacterial virulence has
still not been established. Here, we demonstrate that the
hypothetical gene pa2927 of P. aeruginosa encodes a novel
phospholipase B named PaPlaB. At reaction equilibrium,
PaPlaB purified from detergent-solubilized membranes of E.
coli released fatty acids (FAs) from sn-1 and sn-2 positions
of phospholipids at the molar ratio of 51:49. PaPlaB in
vitro hydrolyzed P. aeruginosa phospholipids reconstituted
in detergent micelles and phospholipids reconstituted in
vesicles. Cellular localization studies indicate that PaPlaB
is a cell-bound PLA of P. aeruginosa and that it is
peripherally bound to both membranes in E. coli, yet the
active form was predominantly associated with the
cytoplasmic membrane of E. coli. Decreasing the
concentration of purified and detergent-stabilized PaPlaB
leads to increased enzymatic activity, and at the same time
triggers oligomer dissociation. We showed that the free FA
profile, biofilm amount and architecture of the wild type
and ΔplaB differ. However, it remains to be established how
the PLB activity of PaPlaB is regulated by
homooligomerisation and how it relates to the phenotype of
the P. aeruginosa ΔplaB. This novel putative virulence
factor contributes to our understanding of phospholipid
degrading enzymes and might provide a target for new
therapeutics against P. aeruginosa biofilms.},
cin = {IMET / JSC / IBI-7 / NIC / IBG-4 / IBG-2 / IBG-3},
ddc = {570},
cid = {I:(DE-Juel1)IMET-20090612 / I:(DE-Juel1)JSC-20090406 /
I:(DE-Juel1)IBI-7-20200312 / I:(DE-Juel1)NIC-20090406 /
I:(DE-Juel1)IBG-4-20200403 / I:(DE-Juel1)IBG-2-20101118 /
I:(DE-Juel1)IBG-3-20101118},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217) / 5111 - Domain-Specific
Simulation $\&$ Data Life Cycle Labs (SDLs) and Research
Groups (POF4-511) / 5241 - Molecular Information Processing
in Cellular Systems (POF4-524) / 2173 - Agro-biogeosystems:
controls, feedbacks and impact (POF4-217) / Forschergruppe
Gohlke $(hkf7_20200501)$ / DFG project 267205415 - SFB 1208:
Identität und Dynamik von Membransystemen - von Molekülen
bis zu zellulären Funktionen (267205415)},
pid = {G:(DE-HGF)POF4-2171 / G:(DE-HGF)POF4-5111 /
G:(DE-HGF)POF4-5241 / G:(DE-HGF)POF4-2173 /
$G:(DE-Juel1)hkf7_20200501$ / G:(GEPRIS)267205415},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:35063652},
UT = {WOS:000797596200005},
doi = {10.1016/j.bbalip.2021.159101},
url = {https://juser.fz-juelich.de/record/906277},
}