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Equilibrium dissociation and unfolding of the arc repressor dimer
Abstract
The equilibrium unfolding reaction of Arc repressor, a dimeric DNA binding protein encoded by bacteriophage P22, can be monitored by fluorescence or circular dichroism changes. The stability of Arc is concentration dependent, and the unfolding reaction is well described as a two-state transition from folded dimer to unfolded monomer. The stability of the protein is decreased at low pH and increased by high salt concentration. The salt dependence suggests that two ions bind preferentially to the folded protein. In 10 mM potassium phosphate (pH 7.3) and 100 mM KCl, the unfolding free energy reaches a maximum near room temperature. The results suggest that at the low protein concentrations where operator DNA binding is normally measured, Arc is predominantly monomeric and unfolded.
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Citations
Cited by
Ellenberger, T. E., Brandl, C. J., Struhl, K., & Harrison, S. C. (1992) · Cell · doi:10.1016/s0092-8674(05)80070-4 · Cited by 972
Monera, O. D., Kay, C. M., & Hodges, R. S. (1994) · Protein Science · doi:10.1002/pro.5560031110 · Cited by 351
Pontius, B. W. (1993) · Trends in Biochemical Sciences · doi:10.1016/0968-0004(93)90111-y · Cited by 183
Metadata
- Authors
- Bowie, J. U., & Sauer, R. T.
- Venue
- Biochemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 1989-09-01
- Volume
- 28
- Issue
- 18
- Pages
- 7139-7143
- ISSN
- 0006-2960 (ISSN-L)
- 1520-4995
- OpenAlex
- W2023577097
- Cited by
- 203
- References
- 0
- FWCI
- 1.98
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Equilibrium dissociation and unfolding of the arc repressor dimer. https://app.cochat.ai/papers/10.1021/bi00444a001
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- Bowie, J. U., & Sauer, R. T. (1989). Equilibrium dissociation and unfolding of the arc repressor dimer. Biochemistry. https://doi.org/10.1021/bi00444a001
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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