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@ARTICLE{Klinker:861817,
author = {Klinker, Stefan and Stindt, Sabine and Gremer, Lothar and
Bode, Johannes G. and Gertzen, Christoph G. W. and Gohlke,
Holger and Weiergräber, Oliver H. and Hoffmann, Silke and
Willbold, Dieter},
title = {{P}hosphorylated tyrosine 93 of hepatitis {C} virus
nonstructural protein 5{A} is essential for interaction with
host c-{S}rc and efficient viral replication},
journal = {The journal of biological chemistry},
volume = {294},
issn = {0021-9258},
address = {Bethesda, Md.},
publisher = {Soc.},
reportid = {FZJ-2019-02245},
pages = {7388-7402},
year = {2019},
abstract = {The hepatitis C virus (HCV) nonstructural protein 5A (NS5A)
plays a key role in viral replication and virion assembly,
and regulation of the assembly process critically depends on
phosphorylation of both serine and threonine residues in
NS5A. We previously identified SRC proto-oncogene,
non-receptor tyrosine kinase (c-Src) as an essential host
component of the HCV replication complex consisting of NS5A,
the RNA-dependent RNA polymerase NS5B, and c-Src. Pull-down
assays revealed an interaction between NS5A and the
Src-homology 2 (SH2) domain of c-Src; however, the precise
binding mode remains undefined. In this study, using a
variety of biochemical and biophysical techniques, along
with molecular dynamics simulations, we demonstrate that the
interaction between NS5A and the c-Src SH2 domain strictly
depends on an intact, phosphotyrosine binding-competent SH2
domain and on tyrosine phosphorylation within NS5A. Detailed
analysis of c-Src SH2 domain binding to a panel of
phosphorylation-deficient NS5A variants revealed that
phosphorylation of Y93 located within domain 1 of NS5A, but
not of any other tyrosine residue, is crucial for complex
formation. In line with these findings, effective
replication of subgenomic HCV replicons as well as
production of infectious virus particles in mammalian cell
culture models were clearly dependent on the presence of
tyrosine at position 93 of NS5A. These findings indicate
that phosphorylated Y93 in NS5A plays an important role
during viral replication by facilitating NS5A’s
interaction with the SH2 domain of c-Src.},
cin = {ICS-6 / JSC / NIC},
ddc = {540},
cid = {I:(DE-Juel1)ICS-6-20110106 / I:(DE-Juel1)JSC-20090406 /
I:(DE-Juel1)NIC-20090406},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511) / 553 - Physical Basis of Diseases (POF3-553)},
pid = {G:(DE-HGF)POF3-511 / G:(DE-HGF)POF3-553},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30862675},
UT = {WOS:000468402900025},
doi = {10.1074/jbc.RA119.007656},
url = {https://juser.fz-juelich.de/record/861817},
}