A sequence-specific DNA-binding protein recognising a GA-rich element cooperates with Oct-1 at the herpes simplex virus type 1 IE3 promoter.
Herpes simplex virus immediate early (IE) gene transcription is regulated via the upstream TAATGARAT motif and involves the recruitment of the ubiquitous octamer-binding protein Oct-1 and a component of the virion Vmw65 into a multiprotein complex termed the immediate early complex (IEC). An upstream GA-rich element (GA-RE) has been postulated to mediate a response to Vmw65 independent of TAATGARAT. We have studied IEC formation in gel shift assays using DNA fragments containing these sequence elements from the HSV-1 IE gene 3 promoter in different combinations. The results show that a factor which footprints to the GA-RE cooperates with Oct-1 to increase IEC levels on a TAATGARAT motif located 5 bp 5' to the GA-RE. The factor alone is unable to promote IEC formation. We were unable to demonstrate any effect of this factor on a TAATGARAT motif located 16 bp from the GA-RE, suggesting that this effect is not universal for all TAATGARAT motifs.
Bailey
A C
AC
Department of Virology, University of Glasgow, UK.
Thompson
R
R
D001482:Base Composition; D001483:Base Sequence; D001667:Binding, Competitive; D016172:DNA Fingerprinting; D004279:DNA, Viral / Q000235:genetics* / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D005814:Genes, Viral; D051863:Host Cell Factor C1; D006801:Humans; D008969:Molecular Sequence Data; D008970:Molecular Weight; D050811:Octamer Transcription Factor-1; D011401:Promoter Regions, Genetic; D018139:Simplexvirus / Q000235:genetics*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
D004279:DNA, Viral; D004268:DNA-Binding Proteins; C497692:HCFC1 protein, human; D051863:Host Cell Factor C1; D050811:Octamer Transcription Factor-1; C494165:POU2F1 protein, human; D014157:Transcription Factors