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POLD1基因启动子中CDE/CHR元件的鉴定及功能分析 被引量:2

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摘要 POLD1基因编码真核生物DNA聚合酶δ的催化亚基,其表达调控与细胞周期密切相关.为了探讨POLD1基因表达的调控机理,本研究首次在POLD1基因启动子中鉴定出CDE/CHR元件,随后通过分析元件序列定点突变对其转录活性的影响,以及与细胞周期相关的转录因子E2F和CDK及抑制因子p21WAF1/Cip1对其转录活性的调控作用,对此元件的功能进行了分析.结果显示,CDE/CHR元件序列突变后POLD1基因启动子转录活性明显升高,其转录活性不再受到E2F和p21WAF1/Cip1的调控,转录活性的细胞周期依赖性调控消失.与此同时本研究对直接参与CDE/CHR元件调控的蛋白进行了初步检测,结果显示,至少存在3种蛋白复合体能够与POLD1基因启动子中的CDE/CHR元件结合.由此证实,POLD1基因启动子中存在CDE/CHR元件,此元件与POLD1基因转录的细胞周期依赖性调控直接相关.
出处 《中国科学(C辑)》 CSCD 北大核心 2009年第5期449-459,共11页 Science in China(Series C)
基金 国家重大科学研究计划(批准号:2007CB914401) 国家高技术研究发展计划(批准号:2006AA02Z4A6)资助项目
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二级参考文献146

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同被引文献49

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