Macromolecular crowding allows blunt-end ligation by DNA ligases from rat liver or Escherichia coli.
- 1 October 1983
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 80 (19) , 5852-5856
- https://doi.org/10.1073/pnas.80.19.5852
Abstract
In the presence of high concentration of any of several types of macromolecules, DNA ligase preparations from rat liver nuclei or from Escherichia coli actively catalyze the blunt-end ligation of DNA. This is in contrast to the lack of activity on such substrates by these enzymes under conventional assay conditions. In addition, the previously established activity of T4 DNA ligase on blunt-ended molecules greatly increased in the presence of high concentrations of macromolecules. Because such crowded solutions may well be a more adequate model for intracellular conditions than assays in dilute solutions, blunt-end ligation may be a widely occurring reaction in vivo.Keywords
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