Alpha-helix formation in a photoswitchable peptide tracked from picoseconds to microseconds by time-resolved IR spectroscopy.
Alpha-helix formation in a photoswitchable peptide tracked from picoseconds to microseconds by time-resolved IR spectroscopy.
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通过时间分辨红外光谱从皮秒到微秒追踪光可切换肽中的α螺旋形成。
DOI:
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发表时间:
2005
影响因子:
11.1
通讯作者:
P. Hamm
中科院分区:
文献类型:
--
作者:
J. Bredenbeck;J. Helbing;J. Kumita;G. Woolley;P. Hamm
Photo-triggered alpha-helix formation of a 16-residue peptide featuring a built-in conformational photoswitch is monitored by time-resolved IR spectroscopy. An experimental approach with 2-ps time resolution and a scanning range up to 30 micros is used to cover all time scales of the peptide dynamics. Experiments are carried out at different temperatures between 281 and 322 K. We observe single-exponential kinetics of the amide I' band at 322 K on a time scale comparable to a recent temperature-jump folding experiment. When lowering the temperature, the kinetics become slower and nonexponential. The transition is strongly activated. Spectrally dispersed IR measurements provide multiple spectroscopic probes simultaneously in one experiment by resolving the amide I' band, isotope-labeled amino acid residues, and side chains. We find differing relaxation dynamics at different spectral positions.
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影响因子:
3
作者:
G. Martinez;G. Millhauser
通讯作者:
G. Martinez;G. Millhauser
影响因子:
2.9
作者:
Williams, S;Causgrove, TP;Dyer, RB
通讯作者:
Dyer, RB
影响因子:
--
作者:
Zhengshuang Shi;R. Woody;N. Kallenbach
通讯作者:
Zhengshuang Shi;R. Woody;N. Kallenbach
DOI:
10.1073/pnas.86.14.5286
发表时间:
1989-07-01
影响因子:
11.1
作者:
MARQUSEE, S;ROBBINS, VH;BALDWIN, RL
通讯作者:
BALDWIN, RL
DOI:
10.1073/pnas.96.11.6031
发表时间:
1999-05-25
影响因子:
11.1
作者:
Sabelko, J;Ervin, J;Gruebele, M
通讯作者:
Gruebele, M