Muscle activation described with a differential equation model for large ensembles of locally coupled molecular motors.
Muscle activation described with a differential equation model for large ensembles of locally coupled molecular motors.
复制标题
使用局部耦合分子马达大型集合的微分方程模型描述肌肉激活。
DOI:
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
S. Walcott
中科院分区:
文献类型:
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作者:
S. Walcott
Molecular motors, by turning chemical energy into mechanical work, are responsible for active cellular processes. Often groups of these motors work together to perform their biological role. Motors in an ensemble are coupled and exhibit complex emergent behavior. Although large motor ensembles can be modeled with partial differential equations (PDEs) by assuming that molecules function independently of their neighbors, this assumption is violated when motors are coupled locally. It is therefore unclear how to describe the ensemble behavior of the locally coupled motors responsible for biological processes such as calcium-dependent skeletal muscle activation. Here we develop a theory to describe locally coupled motor ensembles and apply the theory to skeletal muscle activation. The central idea is that a muscle filament can be divided into two phases: an active and an inactive phase. Dynamic changes in the relative size of these phases are described by a set of linear ordinary differential equations (ODEs). As the dynamics of the active phase are described by PDEs, muscle activation is governed by a set of coupled ODEs and PDEs, building on previous PDE models. With comparison to Monte Carlo simulations, we demonstrate that the theory captures the behavior of locally coupled ensembles. The theory also plausibly describes and predicts muscle experiments from molecular to whole muscle scales, suggesting that a micro- to macroscale muscle model is within reach.
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影响因子:
3.3
作者:
Uppulury, Karthik;Efremov, Artem K.;Driver, Jonathan W.;Jamison, D. Kenneth;Diehl, Michael R.;Kolomeisky, Anatoly B.
通讯作者:
Kolomeisky, Anatoly B.
DOI:
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发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
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作者:
Swartz,DR;Moss,RL
通讯作者:
Moss,RL
DOI:
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发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
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作者:
Lehrer,SS;Morris,EP
通讯作者:
Morris,EP
DOI:
10.1039/b900551j
发表时间:
2009
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
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作者:
Walcott,Sam;Sun,SeanX
通讯作者:
Sun,SeanX
DOI:
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发表时间:
2012
期刊:
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影响因子:
--
作者:
S. Walcott;D. Warshaw;E. Debold
通讯作者:
S. Walcott;D. Warshaw;E. Debold