LRP16基因启动子活性分析

本研究的目的在于分析LRP16基因不同启动子区域的活性，为深入研究LRP16基因的表达调控机制奠定基础。在NCBI的人类基因组数据库中截取并下载LRP16基因转录起始位点5侧翼区2．7kb的基因组序列，设计PCR引物，从健康外周血单个核细胞中克隆和亚克隆了LRP16基因的启动子分子。对各个长度相差400bp左右的亚克隆启动子片段调控荧光素酶表达的作用强度进行比较分析。结果获得了与GeneBank序列一致、长度为2．6kb的LRP16基因启动子DNA序列，其主要调控序列在LRP16基因转录起始位点5侧翼区的-200至-600bp。结论：LRP16基因启动子是一个典型的Ⅱ型启动子，其启动子活性在-200至-600bp区域最强。

Analysis of LRP16 Gene Promoter Activity

The study was aimed to analyze the characteristics of LRP16 gene promoter and its activity in order to explore the possible regulation mechanism of LRP16 gene expression. A 2.6 kb genomic DNA sequence of LRP16 5'-end was obtained from NCBI by BLAST software. The 7 target sequences between 0.2 - 2.6 kb from a healthy blood donor DNA sample were amplified by PCR, then identified by DNA sequencing and semi-nest PCR. The verified sequences were analyzed on-line. The results showed that the 7 target sequences were about 400 bp different from each other. All 7 sequences were the same to these GenBank described. At last, all 7 promoter sequences were ligated with luciferase vector, and then the luciferase activity was analyzed in HeLa cells. A known gene promoter sequence can be freely obtained from NCBI database. It is concluded that LRP16 promoter is a standard type II promoter and its activity is strongest in the region from -200 to -600 bp.