共查询到20条相似文献,搜索用时 31 毫秒
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The functional human dihydrofolate reductase gene 总被引:54,自引:0,他引:54
M J Chen T Shimada A D Moulton A Cline R K Humphries J Maizel A W Nienhuis 《The Journal of biological chemistry》1984,259(6):3933-3943
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A cAMP-responsive element regulates expression of the mouse steroid 11 beta-hydroxylase gene 总被引:7,自引:0,他引:7
D A Rice L D Aitken G R Vandenbark A R Mouw A Franklin B P Schimmer K L Parker 《The Journal of biological chemistry》1989,264(24):14011-14015
In Y1 mouse adrenocortical tumor cells, expression of steroid 11 beta-hydroxylase (11 beta-OHase) is stimulated by cAMP following a delay of 4-6 h. Our results demonstrate that a cAMP-responsive element (CRE) within the 11 beta-OHase promoter region is a major determinant of this induction. The 5'-flanking sequences from the mouse 11 beta-OHase gene were placed in front of a human growth hormone reporter gene and transfected into Y1 cells. Treatment of transfected cells with 8-bromo-cAMP increased expression directed by the 11 beta-OHase 5'-flanking region by 3.8-fold. In 5'-deletion analyses, 123 base pairs of 5'-flanking sequences were sufficient for cAMP induction, whereas cAMP treatment did not affect expression of a plasmid with only 40 base pairs of 5'-flanking sequence. Within these 123 base pairs, a region from -56 to -49 matched 7 of 8 bases comprising the consensus sequence for the CRE. 11 beta-OHase 5'-flanking sequences from -65 to -42, including the CRE-like sequence, conferred cAMP inducibility to promoters from the thymidine kinase and chorionic gonadotropin alpha-subunit genes. DNase I footprinting and Southwestern blotting analyses demonstrated that the protein which interacted with the CRE in the 11 beta-OHase promoter region was similar to the CRE-binding protein associated with other cAMP-regulated genes. Together, these results suggest that an interaction between the 11 beta-OHase CRE and CRE-binding protein mediates cAMP induction of the 11 beta-OHase gene. 相似文献
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K Momoi M R Waterman E R Simpson U M Zanger 《Molecular endocrinology (Baltimore, Md.)》1992,6(10):1682-1690