月光加密酶和域名作为古老和多功能信号设备
Ilona Turek1, Aloysius Wong2,3,4, Guido Domingo5
1Australian Centre for Disease Preparedness, Commonwealth Scientific and Industrial Research Organisation, East Geelong, VIC 3220, Australia.
新型酸环酶 (GCs) 和酸环酶 (ACs) 存在于复杂的蛋白质中,调节细胞功能和荷尔蒙反应. 动机搜索揭示了这些隐藏的酶,有助于在各种蛋白质组中发现.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 酶学 是一种酶学.
背景情况:
- 隐秘的瓜尼酸环酶 (GCs) 和腺酸环酶 (ACs) 越来越多地被识别为 prokaryotes 和 eukaryotes 的复杂蛋白质.
- 这些酶在更大的蛋白质结构中起到分子内部调节和信号生成的作用.
研究的目的:
- 审查新型GC和AC的结构和功能特性.
- 探索它们在调节复杂蛋白质功能的作用,例如植物硫基因受体 (PSKR).
- 调查动机搜索的潜力,以发现新的循环和古老的生物功能.
主要方法:
- 对GC和AC的结构和功能数据的文献综述.
- 对Arabidopsis thaliana K+吸收透酶 (AtKUP5) 的分析,作为多域酶架构的案例研究.
- 在催化中心应用基于保存的氨基酸的模式搜索.
主要成果:
- 已识别的GC和AC调节分子内功能,并有助于信号调.
- AtKUP5蛋白通过其AC和化酶 (PDE) 位点将K+流量感应和激素反应与cAMP平衡相结合.
- 动机搜索成功导致了GC和AC的发现,证明了它们的实用性.
结论:
- 复杂的蛋白质含有多样化的,具有催化活性的GC和AC,这些GC和AC对于细胞调节至关重要.
- 基于动机的搜索是一种强大的策略,可以发现以前未知的酶活性位点和古老的生物功能,包括激素和气体结合.
- 这种方法有望扩大细菌,真菌和动物蛋白质体中已知的酶谱.
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