Localizing internal friction along the reaction coordinate of protein folding by combining ensemble and single-molecule fluorescence spectroscopy.
Localizing internal friction along the reaction coordinate of protein folding by combining ensemble and single-molecule fluorescence spectroscopy.
复制标题
DOI:
10.1038/ncomms2204
复制
发表时间:
2012
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Theory, simulations and experimental results have suggested an important role of internal friction in the kinetics of protein folding. Recent experiments on spectrin domains provided the first evidence for a pronounced contribution of internal friction in proteins that fold on the millisecond timescale. However, it has remained unclear how this contribution is distributed along the reaction and what influence it has on the folding dynamics. Here we use a combination of single-molecule Förster resonance energy transfer, nanosecond fluorescence correlation spectroscopy, microfluidic mixing and denaturant- and viscosity-dependent protein-folding kinetics to probe internal friction in the unfolded state and at the early and late transition states of slow- and fast-folding spectrin domains. We find that the internal friction affecting the folding rates of spectrin domains is highly localized to the early transition state, suggesting an important role of rather specific interactions in the rate-limiting conformational changes. Internal friction affects the kinetics of protein folding. Borgia et al. investigate how this friction affects the folding dynamics of the protein spectrin, revealing a potential role in the rate-limiting conformational changes.
登录
查看更多内容
DOI:
10.1073/pnas.0800228105
发表时间:
2008-09-16
影响因子:
11.1
作者:
Krivov, Sergei V.;Karplus, Martin
通讯作者:
Karplus, Martin
影响因子:
2.9
作者:
ABKEVICH, VI;GUTIN, AM;SHAKHNOVICH, EI
通讯作者:
SHAKHNOVICH, EI
影响因子:
2.9
作者:
CHRUNYK, BA;MATTHEWS, CR
通讯作者:
MATTHEWS, CR
DOI:
10.1126/science.1215768
发表时间:
2012-02-24
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Chung HS;McHale K;Louis JM;Eaton WA
通讯作者:
Eaton WA
DOI:
10.1073/pnas.1207719109
发表时间:
2012-10-02
影响因子:
11.1
作者:
Hofmann, Hagen;Soranno, Andrea;Schuler, Benjamin
通讯作者:
Schuler, Benjamin