The noncoding region of HPV-6vc contains two distinct transcriptional enhancing elements.

The noncoding region of HPV-6vc contains two distinct transcriptional enhancing elements.
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HPV-6vc 的非编码区包含两个不同的转录增强元件。

DOI:
10.1016/0042-6822(86)90215-1
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发表时间:
1986
期刊:
影响因子:
3.7
通讯作者:
Lopez,C
Lopez,C
中科院分区:
医学3区
文献类型:
--
作者:
Rando,RF;Lancaster,WD;Han,P;Lopez,C

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将HPV-6vc亚基因组片段插入氯霉素乙酰转移酶(CAT)的增强子依赖性表达载体中,并测定转录增强元件的存在。当在病毒转化的人肾细胞系(293和324 K)、人宫颈癌细胞系(HeLa和Sibs)和牛乳头瘤病毒1型(BPV-1)转化的小鼠细胞(C127-53)中进行CAT试验时,在HPV-6vc病毒基因组的非编码区(NCR)中检测到转录增强元件。HPV-6 b基因组的NCR区域仅能够以HPV-6vc NCR的三分之一的水平增强HeLa细胞系中CAT基因的转录。C127-53细胞中的HPV-6vc NCR增强活性通过向生长培养基中添加丁酸钠而进一步刺激。负责增强转录的HPV-6vc NCR中的DNA序列的定位揭示了两个不同的增强子元件。一个元件(HPV-6ve位置7218-7544)在293、HeLa、Siha和C127-53细胞中具有活性。第二个增强子元件(HPV-6vc位置7544-7971)仅能够刺激HeLa、C127-53和Siha细胞中的转录。当HPV NCR-CAT表达载体与竞争质粒(pNCR 75)共转染到C127-53或HeLa细胞中时,转录增强降低,表明影响HPV-6vc NCR的两个区段的细胞因子的竞争。
HPV-6vc subgenomic fragments were inserted into an enhancer-dependent expression vector for chloramphenicol acetyltransferase (CAT) and assayed for the presence of transcriptional enhancing elements. A transcriptional enhancing element was detected in the noncoding region (NCR) of the HPV-6vc viral genome when the CAT assays were perfomed in viral transformed human kidney cell lines (293 and 324K), in human cervical carcinoma cell lines (HeLa and Sibs), and in bovine papillomavirus type 1 (BPV-1) transformed mouse cells (C127-53). The NCR region of the HPV-6b genome was only capable of enhancing transcription of the CAT gene in the HeLa cell line at a level one-third that of the HPV-6vc NCR. The HPV-6vc NCR enhancing activity in C127-53 cells was further stimulated by the addition of sodium butyrate to the growth medium. Localization of the DNA sequences in the HPV-6vc NCR responsible for enhancing transcription revealed two distinct enhancer elements. One element (HPV-6ve position 7218–7544) was active in the 293, HeLa, Siha, and C127-53 cells. The second enhancer element (HPV-6vc position 7544–7971) was only capable of stimulating transcription in HeLa, C127-53, and Siha cells. When the HPV NCR-CAT expression vectors were cotransfected with a competitor plasmid (pNCR75) into C127-53 or HeLa cells then transcriptional enhancement decreased, indicating competition of cellular factors which affect both segments of the HPV-6vc NCR.
牛乳头瘤病毒在小鼠细胞中的转化和复制——可在细菌中拯救的 pML2 质粒载体。
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DOI: --
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DOI: --
发表时间: 1985
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影响因子: 64.5
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B. Spalholz;Yu;P. Howley
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DOI: 10.1128/jvi.46.2.567-574.1983
发表时间: 1983
影响因子: 5.4
作者:
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