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- W2117795053 abstract "Microtubules are cytoskeleton multifilament proteins that support many fundamental biological processes such as cell division, cellular transport, and motility. They can be viewed as dynamic polymers that function in nonequilibrium conditions stimulated by hydrolysis of GTP (guanosine triphosphate) molecules bound to their monomers. We present a theoretical description of microtubule dynamics based on discrete-state stochastic models that explicitly takes into account all relevant biochemical transitions. In contrast to previous theoretical analysis, a more realistic physical-chemical description of GTP hydrolysis is presented, in which the hydrolysis rate at a given monomer depends on the chemical composition of the neighboring monomers. This dependence naturally leads to a cooperativity in the hydrolysis. It is found that this cooperativity significantly influences all dynamic properties of microtubules. It is suggested that the dynamic instability in cytoskeleton proteins might be observed only for weak cooperativity, while the strong cooperativity in hydrolysis suppresses the dynamic instability. The presented microscopic analysis is compared with existing phenomenological descriptions of hydrolysis processes. Our analytical calculations, supported by computer Monte Carlo simulations, are also compared with available experimental observations." @default.
- W2117795053 created "2016-06-24" @default.
- W2117795053 creator A5029187622 @default.
- W2117795053 creator A5040071198 @default.
- W2117795053 date "2013-07-30" @default.
- W2117795053 modified "2023-10-18" @default.
- W2117795053 title "Theoretical Analysis of Microtubules Dynamics Using a Physical–Chemical Description of Hydrolysis" @default.
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- W2117795053 doi "https://doi.org/10.1021/jp404794f" @default.
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