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M9650541.TXT
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1996-03-09
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Document 0541
DOCN M9650541
TI Characterization of a transcriptional attenuator within the 5' R region
of the human T cell leukemia virus type 1.
DT 9605
AU Montagne J; Jalinot P; Laboratoire de Biologie Moleculaire et
Cellulaire, CNRS UMR49,; Ecole Normale Superieure de Lyon, France.
SO AIDS Res Hum Retroviruses. 1995 Sep;11(9):1123-9. Unique Identifier :
AIDSLINE MED/96089220
AB Several regulatory sequences have been characterized in the HTLV-I
promoter. We report here identification of a sequence element downstream
of the transcriptional start site within the first 52 nucleotides of the
5' R region, which acts negatively on the activity of the HTLV-I
promoter. Determination of the half-lives of the RNAs either including
or lacking this sequence element showed that the observed effect
intervenes at the transcriptional level. This negative element does not
affect basal activity of the HTLV-I TATA box, but down-regulates
transcription induced by strong activators. Thus, we propose that this
so-called negative regulatory sequence functions as an attenuator of
transcription.
DE Actins/GENETICS Base Sequence Down-Regulation (Physiology) Genes,
Regulator Genes, Reporter *Genes, Viral Globin/GENETICS Hela Cells
Human HTLV-I/*GENETICS Molecular Sequence Data Nucleic Acid
Conformation Promoter Regions (Genetics) RNA, Viral/CHEMISTRY/GENETICS
Support, Non-U.S. Gov't Trans-Activation (Genetics) JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).