Nucleic Acids Research, 1995, Vol. 23, No. 24 5055-5063
© 1995
Articles |
A novel PRD I and TG binding activity involved in virus-induced transcription of IFN-A genes
Laboratoire de Reègulation de I'Expression des Geènes Eucaryotes, CNRS, UPR, 37, UFR Biomeédicale des Saints-Peères, Universiteé Reneé Descartes 45 rue des Saints-Peères, 75270 Paris Cedex 06, France
*To whom correspondence should be addressed
Received July 25, 1995. Accepted November 3, 1995.
Comparative analysis of the inducible elements of the mouse interferon A4 and A11 gene promoters (IE-A4 and IE-A11) by transient transfection experiments, DNase I footprinting and electrophoretic mobility shift assays resulted in identification of a virus-induced binding activity suggested to be involved in NDVinduced activation of transcription of these genes. The virus-induced factor, termed VIF, is activated early by contact of virions with cells. It specifically recognizes the PRD Mike domain shared by both inducible elements, as well as the TG-like domain of IE-A4. This factor, distinct from the IRF-1, IRF-2 and the aF1 binding proteins and presenting a different affinity pattern from that of the TG protein, is proposed as a candidate for IFN-type I gene regulation.
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