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@ARTICLE{Lorenz:864631,
author = {Lorenz, Charlotte and Ince, Semra and Zhang, Tao and
Cousin, Anneliese and Batra‐Safferling, Renu and
Nagel‐Steger, Luitgard and Herrmann, Christian and
Stadler, Andreas M.},
title = {{F}arnesylation of human guanylate‐binding protein 1 as
safety mechanism preventing structural rearrangements and
uninduced dimerization},
journal = {The FEBS journal},
volume = {287},
number = {3},
issn = {1742-4658},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2019-04336},
pages = {496-514},
year = {2020},
abstract = {Human guanylate‐binding protein 1 (hGBP1) belongs to the
family of dynamin‐like proteins and is activated by
addition of nucleotides, leading to protein oligomerization
and stimulated GTPase activity. In vivo, hGBP1 is
post‐translationally modified by attachment of a farnesyl
group yielding farn‐hGBP1. In this study, hydrodynamic
differences in farn‐hGBP1 and unmodified hGBP1 were
investigated using dynamic light scattering (DLS),
analytical ultracentrifugation (AUC) and analytical
size‐exclusion chromatography (SEC). In addition, we
performed small‐angle X‐ray scattering (SAXS)
experiments coupled with a SEC setup (SEC‐SAXS) to
investigate structural properties of nonmodified hGBP1 and
farn‐hGBP1 in solution. SEC‐SAXS measurements revealed
that farnesylation keeps hGBP1 in its inactive monomeric and
crystal‐like conformation in nucleotide‐free solution,
whereas unmodified hGBP1 forms a monomer–dimer equilibrium
both in the inactive ground state in nucleotide‐free
solution as well as in the activated state that is trapped
by addition of the nonhydrolysable GTP analogue GppNHp.
Nonmodified hGBP1 is structurally perturbed as compared to
farn‐hGBP. In particular, GppNHp binding leads to large
structural rearrangements and higher conformational
flexibility of the monomer and the dimer. Structural changes
observed in the nonmodified protein are prerequisites for
further oligomer assemblies of farn‐hGBP1 that occur in
the presence of nucleotides.},
cin = {JCNS-1 / ICS-1 / ICS-6},
ddc = {610},
cid = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)ICS-1-20110106 /
I:(DE-Juel1)ICS-6-20110106},
pnm = {552 - Engineering Cell Function (POF3-552)},
pid = {G:(DE-HGF)POF3-552},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31330084},
UT = {WOS:000479584400001},
doi = {10.1111/febs.15015},
url = {https://juser.fz-juelich.de/record/864631},
}