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The dynamic behaviors and structure conservation of protein BMP-2 on hydroxyapatite nano surfaces

机译:羟基磷灰石纳米表面蛋白质BMP-2的动态行为及结构保护

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The interaction between protein molecules and the hydroxyapatite (HAP) nano surface is an important research topic in many fields. However, the nature of their non-covalent bonding is still not clear at the atomic level. In this work, molecular dynamics (MD) simulation and steered molecular dynamics (SMD) simulation were used to study the adsorption-desorption dynamics of BMP-2 on HAP nano surface. The results suggest that there are two types of adsorption functional groups, -OH and –(COO)~-. And the –(COO)~- group plays the key role. Correspondingly, the Coulombic force between –(COO)~- (in protein BMP-2) and Ca~(2+) (in the HAP nano particles) is the main adsorption mechanism. As to the conversation for protein BMP-2, it is found that the specific adsorption-desorption behaviors of BMP-2 play a great role in the conversation of the protein. And the conservation may go worse in the regions where the adsorbed residues are located.
机译:蛋白质分子和羟基磷灰石(HAP)纳米表面之间的相互作用是许多领域的重要研究主题。然而,它们的非共价键的性质在原子水平仍然不明确。在这项工作中,使用分子动力学(MD)模拟和转向分子动力学(SMD)模拟来研究BMP-2对HAP纳米表面的吸附 - 解吸动力学。结果表明,有两种类型的吸附官能团,-OH和 - (COO)〜 - 。和 - (COO)〜 - 集团扮演关键作用。相应地, - (COO)〜 - (在蛋白质BMP-2中)和Ca〜(2+)之间的库仑力(在HAP纳米颗粒中)是主要吸附机制。关于蛋白质BMP-2的谈话,发现BMP-2的特异性吸附 - 解吸行为在蛋白质的谈话中起着很大的作用。并且保护可能在吸附残留物所在的区域中更差。

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