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用原子精度的化学探针准Aspergillus过敏原奥里津

Olivia N Pattelli^1,2, Dinh Dinh Ly Diec^1,2, Wanting Guo^1,2

¹Sarafan ChEM-H, Stanford University, Stanford, CA, 94305, USA.

Scientific reports

|October 20, 2023

概括

我们确定了Aspergillus fumigatus性蛋白酶 (ALP1) 的原子结构,揭示了其催化机制和基质结合. 这种真菌酶结构可能有助于开发新的抗真菌疗法.

科学领域:

生物化学生物化学
结构生物学结构生物学
菌类学菌类学是指菌类学.

背景情况:

阿斯伯吉勒斯烟雾菌是一种真菌病原体.
过敏原Aspf 13,也称为性蛋白酶 (ALP1),是一个关键的毒性因子.
了解ALP1的结构和功能对于开发抗真菌策略至关重要.

研究的目的:

以原子分辨率阐明Aspergillus fumigatus性蛋白酶 (ALP1) 的分子基础,结构和功能.
为了确定ALP1.1的催化残留物和基质结合偏好.
研究离子在ALP1稳定中的作用.

主要方法:

使用碎片分子替代的X射线晶体学 (1.06 Å分辨率).
化学标签,以识别催化血清残留物.
分子建模用于预测基质和前相互作用.
热展开实验,以评估离子在稳定性中的作用.

主要成果:

确定了真菌性蛋白酶 (oryzin) 的第一个晶体结构.
描述了活性站点架构,包括基底结合口袋 (S1'-S4').
确定了一个离子结合部位,有助于酶稳定.
催化血清残留物被成功标记,证实了它的作用.

结论:

ALP1的原子层结构为其酶机制和基质特异性提供了洞察力.
鉴定到的结合部位增强了酶的稳定性.
这些结构信息可能有助于开发新型治疗药物来对抗Aspergillus fumigatus感染.

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