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@ARTICLE{Gonalves:201313,
author = {Gonçalves, Marcos Brown and Dreyer, Jens and Lupieri,
Paola and Barrera-Patiño, Claudia and Ippoliti, Emiliano
and Webb, Martin R. and Corrie, John E. T. and Carloni,
Paolo},
title = {{S}tructural prediction of a rhodamine-based biosensor and
comparison with biophysical data},
journal = {Physical chemistry, chemical physics},
volume = {15},
number = {6},
issn = {1463-9084},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2015-03618},
pages = {2177 - 2183},
year = {2013},
abstract = {The predicted structure has been calculated for a
protein-based biosensor for inorganic phosphate (Pi),
previously developed by some of us (Okoh et al.,
Biochemistry, 2006, 45, 14764). This is the phosphate
binding protein from Escherichia coli labelled with two
rhodamine fluorophores. Classical molecular dynamics and
hybrid Car–Parrinello/molecular mechanics simulations
allow us to provide molecular models of the biosensor both
in the presence and in the absence of Pi. In the latter
case, the rhodamine fluorophores maintain a stacked
conformation in a ‘face A to face B’ orientation, which
is different from the ‘face A to face A’ stacked
orientation of free fluorophores in aqueous solution (Ilich
et al., Spectrochim. Acta, Part A, 1996, 52, 1323). A
protein conformation change upon binding Pi prevents
significant stacking of the two rhodamines. In both states,
the rhodamine fluorophores form hydrophobic contact with
LEU291, without establishing significant hydrogen bonds with
the protein. The accuracy of the models is established by a
comparison between calculated and experimentalabsorption and
circular dichroism spectra.},
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:000313566300050},
pubmed = {pmid:23247608},
doi = {10.1039/C2CP42396K},
url = {https://juser.fz-juelich.de/record/201313},
}