Light-triggered β-hairpin folding and unfolding
Light-triggered β-hairpin folding and unfolding
复制标题
光触发β发夹折叠和展开
DOI:
10.1073/pnas.0707322104
复制
发表时间:
2007
期刊:
影响因子:
--
通讯作者:
W. Zinth
中科院分区:
文献类型:
--
作者:
T. E. Schrader;W. J. Schreier;T. Cordes;F. O. Koller;G. Babitzki;R. Denschlag;C. Renner;S.-L. Dong;M. Löweneck;L. Moroder;P. Tavan;W. Zinth
A light-switchable peptide is transformed with ultrashort pulses from a β-hairpin to an unfolded hydrophobic cluster and vice versa. The structural changes are monitored by mid-IR probing. Instantaneous normal mode analysis with a Hamiltonian combining density functional theory with molecular mechanics is used to interpret the absorption transients. Illumination of the β-hairpin state triggers an unfolding reaction that visits several intermediates and reaches the unfolded state within a few nanoseconds. In this unfolding reaction to the equilibrium hydrophobic cluster conformation, the system does not meet significant barriers on the free-energy surface. The reverse folding process takes much longer because it occurs on the time scale of 30 μs. The folded state has a defined structure, and its formation requires an extended search for the correct hydrogen-bond pattern of the β-strand.
登录
查看更多内容
DOI:
--
发表时间:
2005
影响因子:
11.1
作者:
J. Bredenbeck;J. Helbing;J. Kumita;G. Woolley;P. Hamm
通讯作者:
P. Hamm
影响因子:
3.4
作者:
J. Wachtveitl;S. Spörlein;H. Satzger;B. Fonrobert;C. Renner;R. Behrendt;D. Oesterhelt;L. Moroder;W. Zinth
通讯作者:
W. Zinth
DOI:
10.1073/pnas.96.16.9068
发表时间:
1999-08-03
影响因子:
11.1
作者:
Dinner, AR;Lazaridis, T;Karplus, M
通讯作者:
Karplus, M
影响因子:
2.8
作者:
T. Schrader;A. Sieg;F. Koller;W. Schreier;Qingrui An;W. Zinth;P. Gilch
通讯作者:
P. Gilch
影响因子:
4.3
作者:
Dong, SL;Löweneck, M;Renner, C
通讯作者:
Renner, C