Yellow fever mosquito sterol carrier protein-2 gene structure and transcriptional regulation.

Yellow fever mosquito sterol carrier protein-2 gene structure and transcriptional regulation.
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DOI:
10.1111/j.1365-2583.2009.00959.x
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发表时间:
2010-04
影响因子:
2.6
通讯作者:
Lan Q
Lan Q
中科院分区:
农林科学2区
文献类型:
--
作者:
Vyazunova I;Lan Q

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AeSCP-2 是一种甾醇载体蛋白,参与蚊子体内的甾醇贩运。 AeSCP-2 基因的活性对于蚊子的发育很重要。一项早期研究表明,在培养的肠道组织中,20-羟基蜕皮酮 (20E) 上调了该基因的转录。为了研究 AeSCP-2 基因的 20E 调控转录,我们截短了 AeSCP-2 基因的上游侧翼区域并将其与报告基因连接。用这些启动子/报告基因构建体转染蚊子 Aag-2 细胞系,并用不同浓度的 20E 处理。不同转录因子(例如 HR3 和 βFTZ-F1)的表达载体也与 AeSCP-2 启动子/报告基因构建体共转染。观察结果表明,不同的转录因子组合产生不同的AeSCP-2基因启动子活性。这一观察结果使我们得出这样的结论:转录因子的伙伴关系对于调节 AeSCP-2 基因的转录活性至关重要。
AeSCP-2, a sterol carrier protein, is involved in sterol trafficking in mosquitoes. The activity of the AeSCP-2 gene is important for mosquito development. An earlier study demonstrated that the transcription of this gene was up-regulated by 20-hydroxyecdysone (20E) in cultured gut tissues. To investigate 20E-regulated transcription of AeSCP-2 gene we truncated the upstream flanking region of AeSCP-2 gene and linked it to a reporter gene. The mosquito Aag-2 cell line was transfected with these promoter/reporter constructs and treated with 20E at various concentrations. Expression vectors of different transcription factors such as HR3 and βFTZ-F1 were also co-transfected with the AeSCP-2 promoter/reporter constructs. The observed results demonstrated that varied combinations of transcription factors produce different promoter activities of the AeSCP-2 gene. This observation leads us to the conclusion that the partnership of transcription factors is crucial in regulating transcriptional activity of AeSCP-2 gene.
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