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- W1520461591 endingPage "3747" @default.
- W1520461591 startingPage "3737" @default.
- W1520461591 abstract "We report the results of fine mapping the sequences responsible for negative regulation of immediate-early (IE) gene 3 by its own gene product, ICP4. Affinity-purified ICP4 binds the transcriptional start site of IE gene 3 and protein-protein interactions induce a secondary mobility shift that footprints exactly as the primary complex. Since these DNA-protein complexes contain ICP4, it is likely that the two differ only in stoichiometry of protein. Additional data show that the DNA-binding domain recognized by ICP4 can be embedded as a cassette in foreign DNA and that native ICP4 will recognize and bind the resulting DNA. In two different immediate-early promoters, the ICP4 binding site can be located either 3' or 5' of the TATA box; however, the ICP4 site is rotationally displaced from the transcription factor IID (TFIID) site by a roughly one-half helical turn, suggesting that ICP4 and TFIID are on the opposite helical face when bound at their respective sites. In the IE1 and IE3 promoters, binding of ICP4 causes an alteration in the helical geometry of the minor groove of the TATA region as visualized by copper footprinting. In contrast, TATA hypersensitivity was not detected in the glycoprotein D promoter (an early gene promoter containing the ICP4 site separated from TATA by eight helical turns) or in an artificial IE3 promoter construct in which the TATA-A4 separation was increased from 2.5 to roughly 5 helical turns. Such stereospecific and distance-dependent conformational alterations in the TATA box under the influence of ICP4 binding may be important in the repression of immediate-early genes." @default.
- W1520461591 created "2016-06-24" @default.
- W1520461591 creator A5007040995 @default.
- W1520461591 creator A5034315871 @default.
- W1520461591 date "1989-09-01" @default.
- W1520461591 modified "2023-10-16" @default.
- W1520461591 title "DNA binding and gene regulation by the herpes simplex virus type 1 protein ICP4 and involvement of the TATA element" @default.
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