在HWE传感器中,功能和更高阶结构的多样性和丁酶
Igor Dikiy1, Danielle Swingle2, Kaitlyn Toy3
1Structural Biology Initiative, CUNY Advanced Science Research Center, New York, New York, USA.
The Journal of biological chemistry
|June 18, 2023
概括
进化可以改变蛋白质寡合化以进行新的调节. 这项研究探讨了多种胺激酶 (HK) 寡合状态,揭示了超越传统模型的新型调节机制.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 蛋白质的寡合体状态对于结构和功能至关重要,通常在进化过程中得到保存.
- 丁激酶 (HKs) 是 prokaryotic 环境传感器,通常作为跨膜同质体起作用.
- 存在例外情况,比如血红蛋白,证明了寡合化对新型调节的进化适应.
研究的目的:
- 研究基因酶的HWE/HisKA2家族中的寡合化状态和调节机制的多样性.
- 探索如何进化变化在寡合化影响HK功能.
- 在环境传感器蛋白中识别潜在的新型监管模式.
主要方法:
- 单体和二元胺基因酶同类体的生物物理和生物化学表征.
- 分析含有光氧电压 (LOV) 和Per-ARNT-Sim (PAS) 域的含有光氧电压的HKs.
- 检查蛋白质-蛋白质相互作用接口参与二分化.
主要成果:
- 鉴定了一种单体溶解HWE/HisKA2 HK (EL346,一个光感应LOV-HK).
- 描述了多个EL346同类物体,表现出多种不同的寡合态 (二元,单元-二元互转) 和依赖光的功能.
- 发现二元化状态会影响一些Per-ARNT-Sim-HKs中的酶活性,并确定了二元LOV-HK中的多重二元化接口.
结论:
- HWE/HisKA2家族在寡头状态和监管策略中表现出显著的多样性.
- 寡合化状态是histidine激酶中的一个灵活的进化特征,使新的调节机制成为可能.
- 研究结果表明,在这个重要的环境传感器类别中,可能存在新的监管模式和寡头状态.
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