DNA flexibility variation may dominate DNase I cleavage

M. E. Hogan, M. W. Roberson, R. H. Austin

Research output: Contribution to journalArticlepeer-review

70 Scopus citations


In a previous experimental study, we proposed that the bending and torsional stiffness of DNA display a systematic sequence dependence. Subsequently, we developed an elastic strain model to quantify the sequence dependence of the bending and torsional rigidity in terms of nearest neighbor interactions and used that model to analyze the sequence dependence of the 434 repressor binding to its operator. The analysis presented here shows that, in the absence of significant local variation of DNA secondary structure, DNase I cleavage is strongly correlated with local variation in the bending flexibility as calculated from our elastic strain model and that the agreement is also quantitatively significant. It is proposed that analysis using elastic strain models will provide a preliminary set of biochemical and chemical tools to explore the relation between DNA flexibility and the binding of other proteins.

Original languageEnglish (US)
Pages (from-to)9273-9277
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number23
StatePublished - 1989

All Science Journal Classification (ASJC) codes

  • General


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