Genomic organization, chromosomal localization, and promoter analysis of the mouse Mail gene

Genomic organization, chromosomal localization, and promoter analysis of the mouse Mail gene
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小鼠 Mail 基因的基因组组织、染色体定位和启动子分析

DOI:
10.1007/s00251-001-0376-x
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发表时间:
2001
期刊:
影响因子:
3.2
通讯作者:
B. Syuto
B. Syuto
中科院分区:
医学4区
文献类型:
--
作者:
T. Shiina;M. Morimatsu;H. Kitamura;Toshihiro Ito;S. Kidou;K. Matsubara;Y. Matsuda;M. Saito;B. Syuto

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抽象的。Mail(具有由脂多糖诱导的锚蛋白重复序列的分子)蛋白是IκB家族的成员。它有六个锚蛋白重复序列,在其他IκB蛋白中是保守的,如IκB-α和Bcl-3。在脂多糖(LPS)注射后,Mail mRNA表达被快速诱导,最显著地在小鼠的脾、肺和淋巴结中,其中免疫细胞如淋巴细胞和巨噬细胞丰富。在这项研究中,我们克隆和表征邮件基因。分离的基因组克隆跨越约30 kb并包含整个基因。与Mail cDNA的比较显示,Mail基因由14个外显子组成。在Mail和其他IκB家族基因中,编码锚蛋白重复序列的几个剪接点是保守的。Southern杂交结果表明,Mail基因是单拷贝基因。使用荧光原位杂交分析,小鼠和大鼠的邮件基因被定位到染色体(Chr)16C1.2-C1.3和Chr 11q21.1,分别。引物延伸确定了Mail的转录起始位点。近端启动子区的序列分析显示存在TATA盒和推定的转录因子结合位点,如NF-κB和NF-IL 6的结合位点。该区域足以驱动LPS刺激的转染细胞中的高水平报告基因表达。
Abstract. The Mail (molecule possessing ankyrin repeats induced by lipopolysaccharide) protein is a member of the IκB family. It has six ankyrin repeats that are conserved in other IκB proteins, such as IκB-α and Bcl-3. Mail mRNA expression is induced rapidly following lipopolysaccharide (LPS) injection, most notably in the spleen, lung, and lymph nodes of mice, where immune cells, such as lymphocytes and macrophages, are abundant. In this study, we cloned and characterized the Mail gene. The isolated genomic clones span approximately 30 kb and encompass the entire gene. Comparisons with Mail cDNA revealed that the Mail gene consists of 14 exons. Several splice junctions encoding ankyrin repeats are conserved among Mail and other IκB family genes. Southern hybridization showed that Mail is a single-copy gene. Using fluorescence in situ hybridization analysis, mouse and rat Mail genes were mapped to Chromosome (Chr) 16C1.2–C1.3 and Chr 11q21.1, respectively. Primer extension determined the transcription start site of Mail. Sequence analysis of the proximal promoter region revealed the presence of a TATA box and putative transcription factor-binding sites, such as those for NF-κB and NF-IL6. This region is sufficient to drive high-level reporter gene expression in LPS-stimulated transfected cells.
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