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@ARTICLE{Losasso:201291,
author = {Losasso, Valeria and Schiffer, Sonja and Barth, Stefan and
Carloni, Paolo},
title = {{D}esign of human granzyme {B} variants resistant to serpin
{B}9},
journal = {Proteins},
volume = {80},
number = {11},
issn = {0887-3585},
address = {New York, NY},
publisher = {Wiley-Liss},
reportid = {FZJ-2015-03596},
pages = {2514 - 2522},
year = {2012},
abstract = {Human granzyme B (hGB) is a serine protease involved in
immune-mediated apoptosis. Its cytotoxicity makes it
potentially applicable in cancer therapy. However, the
effectiveness of hGB can be hampered by the cytosolic
expression of a natural protein inhibitor, human Serpin B9
(hSB9). Here, we used computational approaches to identify
hGB mutations that can affect its binding to hSB9 without
significantly decreasing its catalytic efficiency.
Alanine-scanning calculations allowed us to identify
residues of hGB important for the interaction with hSB9.
Some variants were selected, and molecular dynamic
simulations on the mutated hGB in complex with hSB9 in
aqueous solution were carried out to investigate the effect
of these variants on the stability of the complex. The R28K,
R201A, and R201K mutants significantly destabilized the
interaction of the protein with hSB9. Consistently, all of
these variants also retained their activity in the presence
of the Serpin B9 inhibitor in subsequent in vitro assays of
wild-type and mutated hGB. In particular, the activity of
R201K hGB with and without Serpin B9 is very similar to that
of the wild-type protein. Hence, R201K hGB emerges as a
promising species for antitumoral therapy applications},
cin = {GRS / IAS-5},
ddc = {540},
cid = {I:(DE-Juel1)GRS-20100316 / I:(DE-Juel1)IAS-5-20120330},
pnm = {899 - ohne Topic (POF2-899)},
pid = {G:(DE-HGF)POF2-899},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000309456500003},
pubmed = {pmid:22733450},
doi = {10.1002/prot.24133},
url = {https://juser.fz-juelich.de/record/201291},
}