Investigation on the conformational structure of hemoglobin on graphene oxide

Investigation on the conformational structure of hemoglobin on graphene oxide
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氧化石墨烯上血红蛋白构象结构的研究

DOI:
10.1016/j.matchemphys.2016.07.032
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发表时间:
2016-10
影响因子:
4.6
通讯作者:
Cao Jian
Cao Jian
中科院分区:
材料科学3区
文献类型:
--
作者:
Wang Yanqing;Zhu Zhaohua;Zhang Hongmei;Chen Jian;Tang Boping;Cao Jian

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研究了新型二维碳纳米材料氧化石墨烯(GO)与牛血红蛋白(BHB)的结合作用。研究发现,GO通过形成BHB-GO聚集体强烈干扰了BHB的二级结构。GO与BHB之间的结合亲和力主要来自疏水作用、氢键作用、范德华作用和静电作用。此外,通过分子模拟,提出了两种可能的结合模式,即插入结合模式和表面结合模式。我们的研究结果还表明,GO的存在可以显著阻止BHB的非酶糖基化,并降低蛋白质的热稳定性。本工作阐明了GO与BHB的结合作用对血红素蛋白某些生物学性质和功能的影响。
The binding interaction between bovine hemoglobin (BHb) and a novel two-dimensional carbon nanomaterial, graphene oxide (GO), has been investigated in this work. It is found that GO strongly disturbs the secondary structure of BHb by forming BHb-GO aggregates. The binding affinity between the GO and BHb is shown to be mainly from non-covalent interactions including hydrophobic, hydrogen bonding, van der Waals and electrostatic interactions. In addition, two possible binding modes are proposed, insert binding mode and surface binding mode, as shown by molecular modeling. Our findings also show that the existence of GO can significantly prevent the non-enzymatic glycosylation of BHb and decrease the thermal stability of the protein. This work elucidates the effects of the binding interactions of GO with BHb on some biological properties and functions of heme protein.
深入了解氧化石墨烯与血清蛋白的相互作用以及还原程度和浓度的影响。
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