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- W2037431251 endingPage "10064" @default.
- W2037431251 startingPage "10058" @default.
- W2037431251 abstract "Replication factor C (RFC) and proliferating cell nuclear antigen (PCNA) are processivity factors for eukaryotic DNA polymerases δ and ϵ. RFC contains multiple activities, including its ability to recognize and bind to a DNA primer end and load the ring-shaped PCNA onto DNA in an ATP-dependent reaction. PCNA then tethers the polymerase to the template allowing processive DNA chain elongation. Human RFC consists of five distinct subunits (p140, p40, p38, p37, and p36), and RFC activity can be reconstituted from the five cloned gene products. To characterize the role of the large subunit p140 in the function of the RFC complex, deletion mutants were created that defined a region within the p140 C terminus required for complex formation with the four small subunits. Deletion of the p140 N-terminal half, including the DNA ligase homology domain, resulted in the formation of an RFC complex with enhanced activity in replication and PCNA loading. Deletion of additional N-terminal amino acids, including those constituting the RFC homology box II that is conserved among all five RFC subunits, disrupted RFC replication function. DNA primer end recognition and PCNA binding activities, located in the p140 C-terminal half, were unaffected in this mutant, but PCNA loading was abolished. Replication factor C (RFC) and proliferating cell nuclear antigen (PCNA) are processivity factors for eukaryotic DNA polymerases δ and ϵ. RFC contains multiple activities, including its ability to recognize and bind to a DNA primer end and load the ring-shaped PCNA onto DNA in an ATP-dependent reaction. PCNA then tethers the polymerase to the template allowing processive DNA chain elongation. Human RFC consists of five distinct subunits (p140, p40, p38, p37, and p36), and RFC activity can be reconstituted from the five cloned gene products. To characterize the role of the large subunit p140 in the function of the RFC complex, deletion mutants were created that defined a region within the p140 C terminus required for complex formation with the four small subunits. Deletion of the p140 N-terminal half, including the DNA ligase homology domain, resulted in the formation of an RFC complex with enhanced activity in replication and PCNA loading. Deletion of additional N-terminal amino acids, including those constituting the RFC homology box II that is conserved among all five RFC subunits, disrupted RFC replication function. DNA primer end recognition and PCNA binding activities, located in the p140 C-terminal half, were unaffected in this mutant, but PCNA loading was abolished." @default.
- W2037431251 created "2016-06-24" @default.
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- W2037431251 date "1997-04-01" @default.
- W2037431251 modified "2023-09-30" @default.
- W2037431251 title "Deletion Analysis of the Large Subunit p140 in Human Replication Factor C Reveals Regions Required for Complex Formation and Replication Activities" @default.
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- W2037431251 doi "https://doi.org/10.1074/jbc.272.15.10058" @default.
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