Iranian Biomedical Journal

Iranian Biomedical Journal

Functional and Physical Consequence of Human Immunodefficiency Virus Transactivator TAT Interaction with Human Cell Cycle Regulator p53

Authors
Abstract
Human immunodeficiency virus (HIV) transactivator Tat is a potent activator of both viral and cellu‌lar genes. Tat has also been implicated in the development of AIDS-related malignancy. Here, we show that Tat physically and functionally is able to sequester the cell cycle check point protein p53. This sequestration results in non-functional promoter activity of cyclin-dependent kinase/cyclin in‌hibitor, namely p21 (Waf1). Therefore, it is proposed that a Tat/p53 complex in vivo may deregulate p53 responsive genes, hence allowing for deregulation of check point, which may lead to development of malignancies.
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