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@ARTICLE{Borshchevskiy:186014,
author = {Borshchevskiy, Valentin and Round, Ekaterina and Erofeev,
Ivan and Weik, Martin and Ishchenko, Andrii and Gushchin,
Ivan and Mishin, Alexey and Willbold, Dieter and Büldt,
Georg and Gordeliy, Valentin},
title = {{L}ow-dose {X}-ray radiation induces structural alterations
in proteins},
journal = {Acta crystallographica / D},
volume = {70},
number = {10},
issn = {1399-0047},
address = {Copenhagen},
publisher = {Munksgaard},
reportid = {FZJ-2015-00123},
pages = {2675 - 2685},
year = {2014},
abstract = {X-ray-radiation-induced alterations to protein structures
are still a severe problem in macromolecular
crystallography. One way to avoid the influence of radiation
damage is to reduce the X-ray dose absorbed by the crystal
during data collection. However, here it is demonstrated
using the example of the membrane protein bacteriorhodopsin
(bR) that even a low dose of less than 0.06 MGy may induce
structural alterations in proteins. This dose is about 500
times smaller than the experimental dose limit which should
ideally not be exceeded per data set (i.e. 30 MGy) and 20
times smaller than previously detected specific radiation
damage at the bR active site. To date, it is the lowest dose
at which radiation modification of a protein structure has
been described. Complementary use was made of
high-resolution X-ray crystallography and online
microspectrophotometry to quantitatively study low-dose
X-ray-induced changes. It is shown that structural changes
of the protein correlate with the spectroscopically observed
formation of the so-called bR orange species. Evidence is
provided for structural modifications taking place at the
protein active site that should be taken into account in
crystallographic studies which aim to elucidate the
molecular mechanisms of bR function.},
cin = {ICS-6},
ddc = {570},
cid = {I:(DE-Juel1)ICS-6-20110106},
pnm = {452 - Structural Biology (POF2-452)},
pid = {G:(DE-HGF)POF2-452},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000343060900017},
pubmed = {pmid:25286851},
doi = {10.1107/S1399004714017295},
url = {https://juser.fz-juelich.de/record/186014},
}