Title |
A point mutation in the DNA-binding domain of HPV-2 E2 protein increases its DNA-binding capacity and reverses its transcriptional regulatory activity on the viral early promoter
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Published in |
BMC Molecular and Cell Biology, February 2012
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DOI | 10.1186/1471-2199-13-5 |
Pubmed ID | |
Authors |
Chen Gao, Ming-Ming Pan, Yan-Jun Lei, Li-Qing Tian, Hui-Ying Jiang, Xiao-Li Li, Qi Shi, Chan Tian, Yu-Kang Yuan, Gui-Xiang Fan, Xiao-Ping Dong |
Abstract |
The human papillomavirus (HPV) E2 protein is a multifunctional DNA-binding protein. The transcriptional activity of HPV E2 is mediated by binding to its specific binding sites in the upstream regulatory region of the HPV genomes. Previously we reported a HPV-2 variant from a verrucae vulgaris patient with huge extensive clustered cutaneous, which have five point mutations in its E2 ORF, L118S, S235P, Y287H, S293R and A338V. Under the control of HPV-2 LCR, co-expression of the mutated HPV E2 induced an increased activity on the viral early promoter. In the present study, a series of mammalian expression plasmids encoding E2 proteins with one to five amino acid (aa) substitutions for these mutations were constructed and transfected into HeLa, C33A and SiHa cells. |
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Unknown | 7 | 29% |