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    Science. 1996 Oct 25;274(5287):605-10.

    Tat-SF1: cofactor for stimulation of transcriptional elongation by HIV-1 Tat.

    Zhou Q, Sharp PA.

    Source

    Center for Cancer Research and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

    Abstract

    Tat may stimulate transcriptional elongation by recruitment of a complex containing Tat-SF1 and a kinase to the human immunodeficiency virus-type 1 (HIV-1) promoter through a Tat-TAR interaction. A complementary DNA for the cellular activity, Tat-SF1, has been isolated. This factor is required for Tat trans-activation and is a substrate of an associated cellular kinase. Cotransfection with the complementary DNA for Tat-SF1 specifically modulates Tat activation. Tat-SF1 contains two RNA recognition motifs and a highly acidic carboxyl-terminal half. It is distantly related to EWS and FUS/TLS, members of a family of putative transcription factors with RNA recognition motifs that are associated with sarcomas.

    PMID:
    8849451
    [PubMed - indexed for MEDLINE]

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