阿斯伯吉路斯里扎 (Aspergillus oryzae) 中的VI类G蛋白结合受体通过GTPase激活活性来调节硬化菌的形成
Dong Min Kim1, Itsuki Sakamoto1, Manabu Arioka2,3
1Department of Biotechnology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
Applied microbiology and biotechnology
|January 17, 2024
概括
在阿斯伯吉路斯的VI类G蛋白结合受体 (GPCRs) 负面调节硬化菌的形成. 它们的RGS域充当GTPase激活剂,而它们的丧失会增加与硬化组织相关的基因表达.
科学领域:
- 分子生物学分子生物学
- 菌类学 菌类学是指菌类学.
- 细胞信号传递 细胞信号传递
背景情况:
- G蛋白结合受体 (GPCR) 是关键的跨膜受体,参与信号转导.
- Aspergillus oryzae拥有16个正规的GPCR基因,分为9个类别.
- 第六类GPCRs表现出独特的混合结构,包括七个跨膜 (7-TM) 和G蛋白信号传导 (RGS) 域的调节器.
研究的目的:
- 为了研究Aspergillus oryzae.第六类GPCRs在Aspergillus oryzae中的功能.
- 阐明 RGS 域在第六类 GPCR 功能中的作用.
- 了解VI类GPCRs形成硬化菌的调节机制.
主要方法:
- 第六类GPCRs的基因删除和补充分析.
- 对Gα子单元和天复合基因的表达分析.
- 在突变菌株中形成硬化菌的表型分析.
主要成果:
- 缺乏第六类GPCR基因的突变体显著增加了硬化组织的形成.
- 仅仅RGS域就足以恢复野生类型的表型.
- 强制表达GTPase缺少的AoGpaA或AoGpaB突变体增加了硬化组织的形成.
- 在多重删除突变中,与硬化形成相关的基因velB的表达显著增加.
结论:
- 第六类GPCRs在Aspergillus oryzae中负面调节硬化菌的形成.
- 第六类GPCR的RGS域通过GTPase激活活性负责这种调节.
- 第六类GPCRs的丧失导致了与形成硬化细胞相关的基因的表达增加.
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