Quantifying Secondary Structure Changes in Calmodulin Using 2D-IR Spectroscopy.
Quantifying Secondary Structure Changes in Calmodulin Using 2D-IR Spectroscopy.
复制标题
使用二维红外光谱量化钙调蛋白二级结构的变化。
DOI:
10.1021/acs.analchem.7b02610
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发表时间:
2017
影响因子:
7.4
通讯作者:
Minnes L
中科院分区:
文献类型:
--
作者:
Minnes L
Revealing the details of biomolecular processes in solution needs tools that can monitor structural dynamics over a range of time and length scales. We assess the ability of 2D-IR spectroscopy in combination with multivariate data analysis to quantify changes in secondary structure of the multifunctional calcium-binding messenger protein Calmodulin (CaM) as a function of temperature and Ca2+concentration. Our approach produced quantitative agreement with circular dichroism (CD) spectroscopy in detecting the domain melting transitions of Ca2+-free (apo) CaM (reduction in α-helix structure by 13% (CD) and 15% (2D)). 2D-IR also allows accurate differentiation between melting transitions and generic heating effects observed in the more thermally stable Ca2+-bound (holo) CaM. The functionally relevant random-coil-α-helix transition associated with Ca2+uptake that involves just 7–8 out of a total of 148 amino acid residues was clearly detected. Temperature-dependent Molecular Dynamics (MD) simulations show thatapo-CaM exists in dynamic equilibrium withholo-like conformations, while Ca2+uptake reduces conformational flexibility. The ability to combine quantitative structural insight from 2D-IR with MD simulations thus offers a powerful approach for measuring subtle protein conformational changes in solution.
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影响因子:
3.4
作者:
Yamniuk, Aaron P.;Ishida, Hiroaki;Vogel, Hans J.
通讯作者:
Vogel, Hans J.
DOI:
10.1021/acs.jpcb.5b07706
发表时间:
2015-11-05
期刊:
The journal of physical chemistry. B
影响因子:
--
作者:
Dunkelberger EB;Grechko M;Zanni MT
通讯作者:
Zanni MT
DOI:
10.1016/j.str.2008.12.015
发表时间:
2009-02-13
期刊:
Structure (London, England : 1993)
影响因子:
--
作者:
Manor J;Mukherjee P;Lin YS;Leonov H;Skinner JL;Zanni MT;Arkin IT
通讯作者:
Arkin IT
DOI:
10.1016/s0006-291x(86)80189-9
发表时间:
1986
影响因子:
3.1
作者:
Wolf,BA;Colca,JR;McDaniel,ML
通讯作者:
McDaniel,ML
影响因子:
4.2
作者:
Baiz, Carlos R.;Peng, Chunte Sam;Tokmakoff, Andrei
通讯作者:
Tokmakoff, Andrei