Characterization of the ground state dynamics of proteorhodopsin by NMR and optical spectroscopies
Characterization of the ground state dynamics of proteorhodopsin by NMR and optical spectroscopies
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通过核磁共振和光谱表征变形视紫红质的基态动力学
DOI:
10.1007/s10858-012-9684-8
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发表时间:
2012
影响因子:
2.7
通讯作者:
H. Schwalbe
中科院分区:
文献类型:
--
作者:
Stehle;F. Scholz;F. Löhr;S. Reckel;C. Roos;M. Blum;M. Braun;C. Glaubitz;V. Dötsch;J. Wachtveitl;H. Schwalbe
We characterized the dynamics of proteorhodopsin (PR), solubilized in diC7PC, a detergent micelle, by liquid-state NMR spectroscopy at T = 323 K. Insights into the dynamics of PR at different time scales could be obtained and dynamic hot spots could be identified at distinct, functionally relevant regions of the protein, including the BC loop, the EF loop, the N-terminal part of helix F and the C-terminal part of helix G. We further characterize the dependence of the photocycle on different detergents (n-Dodecyl β-D-maltoside DDM; 1,2-diheptanoyl-sn-glycero-3-phosphocholine diC7PC) by ultrafast time-resolved UV/VIS spectroscopy. While the photocycle intermediates of PR in diC7PC and DDM exhibit highly similar spectral characteristics, significant changes in the population of these intermediates are observed. In-situ NMR experiments have been applied to characterize structural changes during the photocycle. Light-induced chemical shift changes detected during the photocycle in diC7PC are very small, in line with the changes in the population of intermediates in the photocycle of proteorhodopsin in diC7PC, where the late O-intermediate populated in DDM is missing and the population is shifted towards an equilibrium of intermediates states (M, N, O) without accumulation of a single populated intermediate.
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DOI:
10.1016/j.bbabio.2011.09.001
发表时间:
2011
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Mirka;G. Schäfer;S. Shastri;I. Weber;C. Glaubitz;W. Mäntele;J. Wachtveitl
通讯作者:
J. Wachtveitl
影响因子:
--
作者:
Ernesto Freire
通讯作者:
Ernesto Freire
DOI:
10.1007/bf00498853
发表时间:
1985
期刊:
Naunyn-Schmiedeberg's Archives of Pharmacology
影响因子:
--
作者:
Carine Devos;P. Robberecht;P. Nokin;M. Waelbroeck;M. Clinet;J. Camus;P. Beaufort;Philippe Schoenfeld;Jean Christophe
通讯作者:
Jean Christophe
DOI:
10.1073/pnas.0402324101
发表时间:
2004-06-29
影响因子:
11.1
作者:
Hwang, PM;Bishop, RE;Kay, LE
通讯作者:
Kay, LE
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
Tetsuo Takahashi;H. Tomioka;N. Kamo;Y. Kobatake
通讯作者:
Y. Kobatake