Interaction of Bovine Leukemia Virus Transactivator Tax with bZip Proteins

Interaction of the human T-cell lymphotropic virus type 1 tax transactivator with transcription factor IIA.

The Tax protein of human T-cell lymphotropic virus type 1 (HTLV-1) is a 40-kDa transcriptional activator which is critical for HTLV-1 gene regulation and virus-induced cellular transformation. Tax is localized to the DNA through its interaction with the site-specific activators cyclic AMP-responsive element-binding protein, NF-kappaB, and serum response factor. It has been suggested that the re...

Viral proteins associated with the Epstein-Barr virus transactivator, ZEBRA.

The BamHI Z Epstein-Barr replication activator (ZEBRA) mediates disruption of latency and induction of Epstein-Barr virus (EBV) early gene expression in latently infected lymphocytes. Polyclonal rabbit sera raised against ZEBRA were used to immunoprecipitate ZEBRA-associated proteins (ZAPs). ZAPs of 19, 21, 23, and 42 kDa were coimmunoprecipitated with ZEBRA from extracts of EBV-producing lymph...

INTERACTION OF PROTEINS WITH SMALL MOLECULES

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

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 i...

Interaction of bluetongue virus with bovine lymphocytes.

Freshly isolated, and established, cultures of bovine peripheral blood mononuclear leukocytes (PBMLs) were exposed to bluetongue virus (BTV) for the purpose of defining potential lymphotropism. PBML cultures were established in the presence of interleukin 2 (IL-2) and mitogen and maintained either as bulk culture or were cloned prior to infectivity studies. All cultures appeared to be of the T ...