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@ARTICLE{Sluchanko:398520,
author = {Sluchanko, Nikolai N. and Tugaeva, Kristina V. and
Maksimov, Eugene G.},
title = {{S}olution structure of human steroidogenic acute
regulatory protein {STARD}1 studied by small-angle {X}-ray
scattering},
journal = {Biochemical and biophysical research communications},
volume = {489},
number = {4},
issn = {0006-291X},
address = {Orlando, Fla.},
publisher = {Academic Press},
reportid = {PUBDB-2017-14090},
pages = {445 - 450},
year = {2017},
abstract = {Intracellular cholesterol transfer to mitochondria, a
bottleneck of adrenal and gonadal steroidogenesis, relies on
the functioning of the steroidogenic acute regulatory
protein (StAR, STARD1), for which many disease-associated
mutations have been described. Despite significant progress
in the field, the exact mechanism of cholesterol binding and
transfer by STARD1 still remains debatable and often
considers significant structural rearrangements to achieve
ligand binding. The crystal structure of STARD1, obtained
recently at medium resolution, suggests that this protein
has the same fold as other members of the START family.
However, hydrodynamic properties and solution conformation
of STARD1 are insufficiently characterized, partially due to
poor solubility of this protein. Here, we used our recent
protocol to obtain stable and soluble STARD1 and analyzed
its hydrodynamic properties and solution conformation using
a previously inapplicable small-angle X-ray scattering
(SAXS). The SAXS data obtained exclusively from a
monodisperse fraction of the monomeric protein suggest that,
apart from movements of the flexible Ω1-loop, STARD1
unlikely undergoes significant spontaneous rearrangements
proposed earlier as a gating mechanism for cholesterol
binding. The consistency with the previously reported
solution NMR structure of STARD6 suggests similarity of
hydrodynamic behavior of other STARD-containing proteins.},
cin = {EMBL-User},
ddc = {570},
cid = {I:(DE-H253)EMBL-User-20120814},
pnm = {6G3 - PETRA III (POF3-622)},
pid = {G:(DE-HGF)POF3-6G3},
experiment = {EXP:(DE-H253)P-P12-20150101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28576490},
UT = {WOS:000404203000014},
doi = {10.1016/j.bbrc.2017.05.167},
url = {https://bib-pubdb1.desy.de/record/398520},
}