title: Reconstruction of adenovirus replication origins with a human nuclear factor I binding site.
abstract: Nuclear factor I is a host-coded DNA-binding protein that stimulates initiation of adenovirus DNA replication. To understand the mechanism of action of nuclear factor I, we have constructed, by recombinant DNA techniques, origins of replication in which the adenovirus type 5 nuclear factor I binding site (FIB site) has been replaced by a FIB site isolated from human genomic DNA (Gronostajski, R. M., Nagata, K., and Hurwitz, J. (1984) Proc. Natl. Acad. Sci. U. S. A. 81, 4013-4017). Assays of such recombinants for initiation and elongation in vitro showed that nuclear factor I was active only when the FIB site was relatively close to the DNA terminus, i.e. the FIB site was centered at nucleotides 30-36 from the end of the DNA. Nuclear factor I was active in either orientation within this distance range. The presence of one or two additional FIB sites in the downstream region had no effect. The implications of these results for the mechanism of nuclear factor I action are discussed.
mesh_terms: D000256:Adenoviridae / Q000235:genetics*; D001483:Base Sequence; D001665:Binding Sites; D022762:CCAAT-Enhancer-Binding Proteins; D004261:DNA Replication; D004262:DNA Restriction Enzymes / Q000378:metabolism; D004279:DNA, Viral / Q000096:biosynthesis; D004268:DNA-Binding Proteins / Q000378:metabolism*; D003850:Deoxyribonuclease I / Q000378:metabolism; D006801:Humans; D051839:NFI Transcription Factors; D009687:Nuclear Proteins; D009690:Nucleic Acid Conformation; D009693:Nucleic Acid Hybridization; D014157:Transcription Factors; D051840:Y-Box-Binding Protein 1
chemical_list: D022762:CCAAT-Enhancer-Binding Proteins; D004279:DNA, Viral; D004268:DNA-Binding Proteins; D051839:NFI Transcription Factors; D009687:Nuclear Proteins; D014157:Transcription Factors; D051840:Y-Box-Binding Protein 1; C070856:YBX1 protein, human; D004262:DNA Restriction Enzymes; D003850:Deoxyribonuclease I