Reference: Merkle CJ, et al. (2003) Cloning and characterization of hCTF18, hCTF8, and hDCC1. Human homologs of a Saccharomyces cerevisiae complex involved in sister chromatid cohesion establishment. J Biol Chem 278(32):30051-6

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Abstract


A growing body of evidence suggests that establishment of sister chromatid cohesion is dependent on replication fork passage over a precohesion area. In Saccharomyces cerevisiae, this process involves an alternative replication factor C (RFC) complex that contains the four small RFC subunits as well as CTF18, CTF8, and DCC1. Here, we show that an evolutionarily conserved homologous complex exists in the nucleus of human cells. We demonstrate that hCTF18, hCTF8, and hDCC1 interact with each other as well as with the p38 subunit of RFC. This alternative RFC-containing complex interacts with proliferating cell nuclear antigen but not with the Rad9/Rad1/Hus1 complex, a proliferating cell nuclear antigen-like clamp involved in the DNA damage response. hCTF18 preferentially binds chromatin during S phase, suggesting a role during replication. Our data provide evidence for the existence of an alternative RFC complex with a probable role in mammalian sister chromatid cohesion establishment.

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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
Authors
Merkle CJ, Karnitz LM, Henry-Sánchez JT, Chen J
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