Angew Chem Int Ed Engl:结核治疗新靶点的发现

2017-03-20 MedSci MedSci原创

肝素结合血凝素(HBHA)是结核分枝杆菌细胞膜上的199号氨基酸毒性分子,能导致潜伏性的结核感染。HBHA与呼吸道上皮细胞结合后,会导致病原体的肺外传播。而细胞表面的硫酸乙酰肝素(HS)介导了这一过程。该研究主要是通过NMR光谱学的应用,报道了HBHA/HS复合体的结构特征。为了建立一个分子识别的模型,该研究将HBHA/HS复合体中的八糖HS一律标记上13C和15N、HBHA也一律标记上13C和1

肝素结合血凝素(HBHA)是结核分枝杆菌细胞膜上的199号氨基酸毒性分子,能导致潜伏性的结核感染


HBHA与呼吸道上皮细胞结合后,会导致病原体的肺外传播。而细胞表面的硫酸乙酰肝素(HS)介导了这一过程。

该研究主要是通过NMR光谱学的应用,报道了HBHA/HS复合体的结构特征。为了建立一个分子识别的模型,该研究将HBHA/HS复合体中的八糖HS一律标记上13C和15N、HBHA也一律标记上13C和15N。

结果显示,在HBHA的C末端区域残留的180-195号氨基酸与八糖均表现出了大量的化学位移变化。分子动力学模拟结果与多维NMR数据显示的结合区的静电力及疏水作用的相互作用相符合。这一结果使我们可以考虑把分子间的键合区作为靶点来研究新的药物。

原始出处:

Huang TY, Irene D, Zulueta MM,et al.Structure of the Complex between a Heparan Sulfate Octasaccharide and Mycobacterial Heparin-Binding Hemagglutinin.Angew Chem Int Ed Engl. 2017 Mar 15. doi: 10.1002/anie.201612518.

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    2017-04-28 haouestc
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    2017-05-10 spoonycyy
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    2017-06-27 cy0324
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    2017-03-22 lsndxfj
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