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Binding properties of replication protein A from human and yeast cells.
Open accessAbstract
Replication protein A (RP-A; also known as replication factor A and human SSB), is a single-stranded DNA-binding protein that is required for simian virus 40 DNA replication in vitro. RP-A isolated from both human and yeast cells is a very stable complex composed of 3 subunits (70, 32, and 14 kDa). We have analyzed the DNA-binding properties of both human and yeast RP-A in order to gain a better understanding of their role(s) in DNA replication. Human RP-A has high affinity for single-stranded DNA and low affinity for RNA and double-stranded DNA. The apparent affinity constant of RP-A for single-stranded DNA is in the range of 10(9) M-1. RP-A has a binding site size of approximately 30 nucleotides and does not bind cooperatively. The binding of RP-A to single-stranded DNA is partially sequence dependent. The affinity of human RP-A for pyrimidines is approximately 50-fold higher than its affinity for purines. The binding properties of yeast RP-A are similar to those of the human protein. Both yeast and human RP-A bind preferentially to the pyrimidine-rich strand of a homologous origin of replication: the ARS307 or the simian virus 40 origin of replication, respectively. This asymmetric binding suggests that RP-A could play a direct role in the process of initiation of DNA replication.
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Cited by
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de Laat, W. L., Jaspers, N. G. J., & Hoeijmakers, J. H. J. (1999) · Genes & Development · doi:10.1101/gad.13.7.768 · Cited by 1,122
Mammalian DNA nucleotide excision repair reconstituted with purified protein components
Aboussekhra, A., Biggerstaff, M., Shivji, M. K. K., Vilpo, J. A., Moncollin, V., Podust, V. N., Protić, M., Hübscher, U., Egly, J.-M., & Wood, R. D. (1995) · Cell · doi:10.1016/0092-8674(95)90289-9 · Cited by 837
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Metadata
- Authors
- Kim, C., Snyder, R. O., & Wold, M. S.
- Venue
- Molecular and Cellular Biology
- Publisher
- Informa UK Limited
- Published
- 1992-07
- Volume
- 12
- Issue
- 7
- Pages
- 3050-3059
- ISSN
- 0270-7306 (ISSN-L)
- 1098-5549
- OpenAlex
- W1805239396
- Cited by
- 294
- References
- 0
- FWCI
- 6.62
- Type
- journal article
- Language
- en
- Open access
- green
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