HTATSF1

HIV Tat-specific factor 1 is a protein that in humans is encoded by the "HTATSF1" gene.
Whereas most DNA sequence-specific transcription factors increase the rate of initiation and interact with enhancer or promoter DNA, human immunodeficiency virus-1 (HIV-1) Tat predominantly stimulates elongation and interacts with the trans-acting responsive (TAR) RNA element. Tat is essential for HIV replication.[supplied by OMIM]
Interactions.
HTATSF1 has been shown to interact with SUPT5H and GTF2F2.