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. 1993 May 25;21(10):2293–2300. doi: 10.1093/nar/21.10.2293

The adenovirus terminal protein influences binding of replication proteins and changes the origin structure.

R Pronk 1, P C van der Vliet 1
PMCID: PMC309523  PMID: 8506126

Abstract

The adenovirus terminal protein (TP) is covalently linked to the 5' ends of the adenovirus genome and enhances DNA replication in vitro by increasing template activity. To study the effect of TP in more detail we isolated short origin fragments containing functional TP using anion exchange chromatography. These fragments were highly active as templates for DNA replication in a reconstituted system. Employing band-shift assays we found that the affinity of the precursor terminal protein-DNA polymerase complex for the TP-containing origin was increased 2 to 3-fold. Binding affinities of two other replication stimulating proteins, NFI and Oct-1, were not influenced by the terminal protein. Upon DNaseI footprinting we observed, unexpectedly, that the breakdown pattern had changed at various positions in the origin, notably in the area 3-6 and 41-51 by the presence of TP. Some differences in the footprint pattern of NFI and Oct-1 were also found. Our results indicate that TP induces subtle changes in the origin structure that influence the interaction of other replication proteins.

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