A 5' beta-globin matrix-attachment region and the polyoma enhancer together confer position-independent transcription.
A 5' beta-globin matrix-attachment region and the polyoma enhancer together confer position-independent transcription.
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5 β-珠蛋白基质附着区和多瘤增强子一起赋予位置无关的转录。
DOI:
10.1016/0378-1119(94)90747-1
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发表时间:
1994
期刊:
影响因子:
3.5
通讯作者:
B. Villeponteau
中科院分区:
文献类型:
--
作者:
Jinghua Yu;J. H. Bock;J. Slightom;B. Villeponteau
Insertions of reporter constructs into the genome of higher eukaryotes typically lead to variegated gene expression due to position effects at the sites of integration. The 20-kb human β-globin (βGlb) locus control region (LCR) has been found to dampen these position effects when included in an expression vector. Several studies have indicated that much of the activity of the βGlb-LCRresides in hypersensitive site II, which contains a strong enhancer. In this study, we have focused on the matrix-attachment region (MAR) at the 5′ boundary of the βGlb-LCR. We find that the βGlb-MAR, by itself, has little effect on transcription of a reporter gene in stable transformants. However, when the βGlb-MARis linked inciswith the polyoma virus enhancer, theMAR-enhancer construct confers high levels of copy-dependent transcription that is independent of the chromosomal site of integration. These results suggest that the βGlb-MARmay work synergistically with particular enhancer elements to dampen chromosomal position effects and ensure high-level expression.
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DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Slightom,JL;Theisen,TW;Koop,BF;Goodman,M
通讯作者:
Goodman,M
影响因子:
56.9
作者:
BODE, J;KOHWI, Y;KOHWISHIGEMATSU, T
通讯作者:
KOHWISHIGEMATSU, T
DOI:
10.1016/0167-4781(92)90437-5
发表时间:
1992
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Feng,J;Villeponteau,B
通讯作者:
Villeponteau,B
DOI:
10.1073/pnas.86.14.5439
发表时间:
1989-07-01
影响因子:
11.1
作者:
FORRESTER, WC;NOVAK, U;GROUDINE, M
通讯作者:
GROUDINE, M