Cracking phase diagram for the dynamics of an enzyme.

Cracking phase diagram for the dynamics of an enzyme.
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酶动力学的裂解相图。

DOI:
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发表时间:
2012
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
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通讯作者:
G. Zocchi
G. Zocchi
中科院分区:
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文献类型:
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作者:
Hao Qu;J. Landy;G. Zocchi

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我们测量一种酶在振荡作用力下的整体平均变形。从鸟苷酸激酶铰链运动的机械极化率的低频发散,我们得到了频率-力平面上的非平衡相图。一条相线将线弹性动力学与较软(粘弹性)动力学分开。铰链运动对应于越过这条相线(而不是柔线弹性模式)。与酶的开放状态相比,闭合状态下的相线发生了显著的移位。
We measure the ensemble averaged deformation of an enzyme for an oscillating applied force. From the low frequency divergence of the mechanical susceptibility for the hinge motion of guanylate kinase we obtain a nonequilibrium phase diagram in the frequency-force plane. A phase line separates linear elasticity dynamics from softer (viscoelastic) dynamics. The hinge motion corresponds to crossing this phase line (not to a soft linear elastic mode). The phase line is dramatically shifted in the closed state compared to the open state of the enzyme.
DOI: 10.1006/jmbi.2000.4427
发表时间: 2001-03-16
影响因子: 5.6
作者:
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通讯作者: Ji, XH
DOI: 10.1016/j.jmb.2006.11.085
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