Prolactin-deficient GH3B3 cells are defective in the utilization of the endogenous prolactin promoter yet are fully competent to initiate transcription from a transfected prolactin promoter.
Prolactin-deficient GH3B3 cells are defective in the utilization of the endogenous prolactin promoter yet are fully competent to initiate transcription from a transfected prolactin promoter.
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催乳素缺陷的 GH3B3 细胞在利用内源催乳素启动子方面存在缺陷,但完全有能力从转染的催乳素启动子启动转录。
DOI:
10.1089/dna.1991.10.105
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发表时间:
1991
影响因子:
3.1
通讯作者:
Ivarie,R
中科院分区:
文献类型:
--
作者:
Arnold,TE;Farrance,IK;Morris,J;Ivarie,R
Transcription of the prolactin (PRL) gene has been analyzed in wild-type D6, PRL-deficient B3, and revertant r16 GH3cells. Levels of processed nuclear transcripts from the PRL gene were substantially reduced in the deficient line compared to wild-type cells and returned to greater than wild-type levels in the revertant line. Rare PRL transcripts in the deficient line contained the same 5′ end found on transcripts in wild-type and revertant cells as judged by primer extension and S1nuclease protection assays, implying that the cells are deficient in utilization of the normal wild-type promoter. Deficient cells also contained wild-type levels of the PRL- and growth hormone-specific transcription factor pit-1/GHF-1, and no difference was found in the ability of extracts from wild-type and deficient cells to retard various restriction fragments from both the proximal and the distal PRL promoter regions. The deficient and wild-type cells were equally competent in initiating transcription from a transfected rat PRL promoter containing both the distal and proximal promoter elements. These observations imply that PRL-deficient cells are not defective in atrans-activating factor functioning on these PRL promoter fragments (transmodel). Rather, inefficient use of the PRL promoter in the variant cells may reflect an increased methylation state of the PRL gene itself (cismodel).
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影响因子:
4.4
作者:
R. Ferguson;J. Schmidtke;R. Simmons
通讯作者:
R. Simmons
影响因子:
4.4
作者:
S. Legrue;A. Friedman;B. Kahan
通讯作者:
B. Kahan
DOI:
--
发表时间:
1981
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
Basil D. Roufogalis
通讯作者:
Basil D. Roufogalis
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Moore,PB;Dedman,JR
通讯作者:
Dedman,JR
DOI:
10.1016/0304-419x(84)90018-0
发表时间:
1984
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
M. Veigl;T. Vanaman;W. D. Sedwick
通讯作者:
W. D. Sedwick