Time-resolved dimerization of a PAS-LOV protein measured with photocoupled small angle X-ray scattering.

Time-resolved dimerization of a PAS-LOV protein measured with photocoupled small angle X-ray scattering.
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DOI:
10.1021/ja804236f
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发表时间:
2008-09-17
影响因子:
15
通讯作者:
Pollack, Lois
Pollack, Lois
中科院分区:
化学1区
文献类型:
--
作者:
Lamb, Jessica S.;Zoltowski, Brian D.;Pabit, Suzette A.;Crane, Brian R.;Pollack, Lois

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时间分辨小角X射线散射(SAXS)已被用来探测蓝光信号转导蛋白Vivid(VVD)的光激发。在连续流动池中的样品的激光激发使得能够时间分辨地测量VVD对照明的初始响应。在不依赖于同一样品的多次曝光或限制曝光时间以防止辐射损伤的情况下实现了良好的信噪比。SAXS的数据表明,VVD二聚化在几十毫秒的光状态激活。流动池形式的时间分辨SAXS是用于将光感受器中的化学变化与构象驱动的输出信号连接的一般方法。
Time-resolved small angle x-ray scattering (SAXS) has been used to probe photoexcitation of the blue-light signal transduction protein Vivid (VVD). Laser excitation of sample in a continuous flow cell enables time-resolved measurement of the initial response of VVD to illumination. Good signal-to-noise is achieved without relying on multiple exposures of the same sample or limiting exposure times to prevent radiation damage. The SAXS data demonstrate that VVD dimerizes within tens of milliseconds of light-state activation. Time-resolved SAXS in a flow cell format is a general method for connecting chemical changes in photoreceptors to conformationally driven output signals.
DOI: 10.1126/science.1137128
发表时间: 2007-05-18
期刊: SCIENCE
影响因子: 56.9
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发表时间: 2004-03-24
影响因子: 15
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期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
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