Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-825
Mossi, R; Jónsson, Z O; Allen, B L; Hardin, S H; Hübscher, U (1997). Replication factor C interacts with the C-terminal side of proliferating cell nuclear antigen. Journal of Biological Chemistry, 272(3):1769-1776.
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Replication factor C (RF-C) is a heteropentameric protein essential for DNA replication and repair. It is a molecular matchmaker required for loading of proliferating cell nuclear antigen (PCNA) onto double-stranded DNA and, thus, for PCNA-dependent DNA elongation by DNA polymerases delta and epsilon. To elucidate the mode of RF-C binding to the PCNA clamp, modified forms of human PCNA were used that could be 32P-labeled in vitro either at the C or the N terminus. Using a kinase protection assay, we show that the heteropentameric calf thymus RF-C was able to protect the C-terminal region but not the N-terminal region of human PCNA from phosphorylation, suggesting that RF-C interacts with the PCNA face at which the C termini are located (C-side). A similar protection profile was obtained with the recently identified PCNA binding region (residues 478-712), but not with the DNA binding region (residues 366-477), of the human RF-C large subunit (Fotedar, R., Mossi, R., Fitzgerald, P., Rousselle, T., Maga, G., Brickner, H., Messner, H., Khastilba, S., Hübscher, U., and Fotedar, A., (1996) EMBO J., 15, 4423-4433). Furthermore, we show that the RF-C 36 kDa subunit of human RF-C could interact independently with the C-side of PCNA. The RF-C large subunit from a third species, namely Drosophila melanogaster, interacted similarly with the modified human PCNA, indicating that the interaction between RF-C and PCNA is conserved through eukaryotic evolution.
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|Item Type:||Journal Article, refereed|
|Communities & Collections:||05 Vetsuisse Faculty > Institute of Veterinary Biochemistry and Molecular Biology|
|Dewey Decimal Classification:||570 Life sciences; biology|
|Date:||17 January 1997|
|Deposited On:||11 Feb 2008 12:18|
|Last Modified:||08 Jun 2014 07:47|
|Publisher:||American Society for Biochemistry and Molecular Biology|
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