RISC-loading complex subunit TARBP2 is a protein that in humans is encoded by the TARBP2gene.[5][6]
Function
HIV-1, the causative agent of acquired immunodeficiency syndrome (AIDS), contains an RNA genome that produces a chromosomally integrated DNA during the replicative cycle. Activation of HIV-1 gene expression by the transactivator Tat is dependent on an RNA regulatory element (TAR) located downstream of the transcription initiation site. The protein encoded by this gene binds between the bulge and the loop of the HIV-1 TAR RNA regulatory element and activates HIV-1 gene expression in synergy with the viral Tat protein. Alternative splicing results in multiple transcript variants encoding different isoforms. This gene also has a pseudogene.[6]
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Duarte M, Graham K, Daher A, Battisti PL, Bannwarth S, Segeral E, Jeang KT, Gatignol A (2001). "Characterization of TRBP1 and TRBP2. Stable stem-loop structure at the 5' end of TRBP2 mRNA resembles HIV-1 TAR and is not found in its processed pseudogene". Journal of Biomedical Science. 7 (6): 494–506. doi:10.1007/bf02253365. PMID11060498.
Battisti PL, Daher A, Bannwarth S, Voortman J, Peden KW, Hiscott J, Mouland AJ, Benarous R, Gatignol A (Sep 2003). "Additive activity between the trans-activation response RNA-binding protein, TRBP2, and cyclin T1 on HIV type 1 expression and viral production in murine cells". AIDS Research and Human Retroviruses. 19 (9): 767–78. doi:10.1089/088922203769232566. PMID14585207.
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Bannwarth S, Lainé S, Daher A, Grandvaux N, Clerzius G, Leblanc AC, Hiscott J, Gatignol A (Feb 2006). "Cell-specific regulation of TRBP1 promoter by NF-Y transcription factor in lymphocytes and astrocytes". Journal of Molecular Biology. 355 (5): 898–910. doi:10.1016/j.jmb.2005.11.026. PMID16343534.