在南极的昼夜时钟中的第二个反循环的功能性表征Euphausia superbaba
Chiara Stefanelli1, Davide Colaianni1, Gabriella M Mazzotta1
1Department of Biology, University of Padova, Padova, 35121, Italy.
BMC biology
|December 24, 2024
概括
研究人员确定了南极 (Euphausia superba) 的昼夜时钟中的第二个反循环. 这项研究描述了pdp1基因和Vrille基因的特征,揭示了它们在调节时钟基因表达中的作用.
科学领域:
- 海洋生物学 海洋生物学
- 时间生物学 时间生物学
- 分子生物学分子生物学
背景情况:
- 南极 (Euphausia superba) 是南大洋的一个基石物种.
- 在鱼中,生物钟的主要组成部分已知,但第二个反循环仍然未被描述.
- 弗里尔基因,一个负组分,以前在转录水平上被确定.
研究的目的:
- 描述的昼夜时钟的第二个反循环.
- 识别正元件pdp1,并对pdp1和vrille进行功能性特征.
- 为了阐明调节南极的时钟基因表达的分子机制.
主要方法:
- 使用 KrillDB 转录组数据库识别和克隆 pdp1 序列.
- 进行了组织表达分析和光酶试验,以评估功能活性.
- 在体外研究了pdp1异型和vrille异型的相互作用.
- 在光暗周期下分析了 pdp1 和 vrille 的节奏表达.
主要成果:
- 鉴定并克隆了三个假定的pdp1序列,其中Espdp1_3在相关的昼夜组织中表达更高.
- 在实验室中,EsPDP1_3和EsVRI_2显示了预期的V/P盒的正负调节.
- Espdp1_3和Esvrille在光暗周期下表现出节奏表达,证实了它们在昼夜时钟中的作用.
结论:
- 定义了在南极鱼中调节时钟基因表达的组成部分.
- 确定了的昼夜时钟中的第二个反循环的存在和组件.
- 扩大了对南极鱼昼夜钟分子结构的理解.
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