Conformational regions of Boc-Ala-Aib-Ala-OMe. Sampling with molecular dynamics simulations using time averaging of distance restraints.

R M Brunne, D Leibfritz
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Abstract

The method of time averaging of distance restraints in molecular dynamics simulations is applied to Boc-Ala-Aib-Ala-OMe in order to demonstrate the improved sampling properties of this method compared to conventional distance restraining. Two conformational regions, beta-turn type II and gamma-turn, are seen during MD runs at a simulation temperature of 500 K, while in simulations with conventional distance restraining, no conformational transitions could be observed for temperatures up to 1000 K.

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Boc-Ala-Aib-Ala-OMe的构象区。使用距离限制时间平均的分子动力学模拟采样。
将分子动力学模拟中距离约束的时间平均方法应用于Boc-Ala-Aib-Ala-OMe,以证明该方法与常规距离约束相比具有更好的采样性能。在500 K的模拟温度下,MD运行时可以看到两个构象区,β -转II型和γ -转,而在常规距离限制的模拟中,在高达1000 K的温度下没有观察到构象转变。
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