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. 1984 Jul;51(1):91–96. doi: 10.1128/jvi.51.1.91-96.1984

Critical spatial requirement within the origin of simian virus 40 DNA replication.

G L Cohen, P J Wright, A L DeLucia, B A Lewton, M E Anderson, P Tegtmeyer
PMCID: PMC254404  PMID: 6328047

Abstract

We inserted a single base pair into the center of a 27-base-pair palindrome within the replication origin of simian virus 40. The mutation did not directly alter the symmetry of the palindrome or the protein-binding sequences within the palindrome. DNA binding studies showed that subunits of the simian virus 40 A protein (T antigen) bound to each of the four recognition pentanucleotides in the origin palindrome but did so with reduced affinity in comparison with wild-type origins. The mutant origin cloned in a plasmid DNA failed to replicate in COS cells. Thus, precise spatial interactions among subunits of A protein are necessary for stable origin binding and are crucial for subsequent steps in the initiation of DNA replication. Furthermore, any possible functional interactions of the simian virus 40 A protein with cellular DNA would require a great fidelity of protein binding arrangements to initiate cellular DNA replication.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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