A Tat-induced auto-up-regulatory loop for superactivation of the human immunodeficiency virus type 1 promoter

Abstract excerpt

The virus-encoded Tat protein strongly activates transcription of human immunodeficiency virus (HIV). A well-recognized mechanism involves interaction of Tat with the nascent RNA transcript of the viral tar gene; mutation of tar greatly decreases activation by Tat. However, Tat still provides a low level of activation, demonstrating that it also has a tar-independent mode of action. We propose that this...

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