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@ARTICLE{Leal:807737,
author = {Leal, Ana Rita and Cruz, Rui and Bur, Daniel and Huesgen,
Pitter and Faro, Rosário and Manadas, Bruno and Wlodawer,
Alexander and Faro, Carlos and Simões, Isaura},
title = {{E}nzymatic properties, evidence for in vivo expression,
and intracellular localization of shewasin {D}, the pepsin
homolog from {S}hewanella denitrificans},
journal = {Scientific reports},
volume = {6},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2016-02155},
pages = {23869},
year = {2016},
abstract = {The widespread presence of pepsin-like enzymes in
eukaryotes together with their relevance in the control of
multiple biological processes is reflected in the large
number of studies published so far for this family of
enzymes. By contrast, pepsin homologs from bacteria have
only recently started to be characterized. The work with
recombinant shewasin A from Shewanella amazonensis provided
the first documentation of this activity in prokaryotes.
Here we extend our studies to shewasin D, the pepsin homolog
from Shewanella denitrificans, to gain further insight into
this group of bacterial peptidases that likely represent
ancestral versions of modern eukaryotic pepsin-like enzymes.
We demonstrate that the enzymatic properties of recombinant
shewasin D are strongly reminiscent of eukaryotic pepsin
homologues. We determined the specificity preferences of
both shewasin D and shewasin A using proteome-derived
peptide libraries and observed remarkable similarities
between both shewasins and eukaryotic pepsins, in particular
with BACE-1, thereby confirming their phylogenetic
proximity. Moreover, we provide first evidence of expression
of active shewasin D in S. denitrificans cells, confirming
its activity at acidic pH and inhibition by pepstatin.
Finally, our results revealed an unprecedented localization
for a family A1 member by demonstrating that native shewasin
D accumulates preferentially in the cytoplasm.},
cin = {ZEA-3},
ddc = {000},
cid = {I:(DE-Juel1)ZEA-3-20090406},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000373170500001},
doi = {10.1038/srep23869},
url = {https://juser.fz-juelich.de/record/807737},
}