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hMSH3 and hMSH6 interact with PCNA and colocalize with it to replication foci
Open accessAbstract
Proliferating cell nuclear antigen (PCNA) has been implicated in eukaryotic postreplicative mismatch correction, but the nature of its interaction with the repair machinery remained enigmatic. We now show that PCNA binds to the human mismatch binding factors hMutSα and hMutSβ via their hMSH6 and hMSH3 subunits, respectively. The N-terminal domains of both proteins contain the highly conserved PCNA-binding motif Qxx[LI]xx[FF]. A variant of hMutSα, lacking this motif because of deletion of 77 N-terminal residues of the hMSH6 subunit, no longer was able to interact with PCNA in vitro and failed to restore mismatch repair in hMSH6-deficient cells. Colocalization of PCNA and hMSH6 or hMSH3 to replication foci implies an intimate link between replication and mismatch correction. We postulate that PCNA plays a role in repair initiation by guiding the mismatch repair proteins to free termini in the newly replicated DNA strands.
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Nakanishi, M., Robetorye, R. S., Pereira-Smith, O. M., & Smith, J. R. (1995) · Journal of Biological Chemistry · doi:10.1074/jbc.270.29.17060 · Cited by 92
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Grady, W. M., & Carethers, J. M. (2008) · Gastroenterology · doi:10.1053/j.gastro.2008.07.076 · Cited by 960
DNA Mismatch Repair: Functions and Mechanisms
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Metadata
- Authors
- Kleczkowska, H. E., Marra, G., Lettieri, T., & Jiricny, J.
- Venue
- Genes & Development
- Publisher
- Cold Spring Harbor Laboratory
- Published
- 2001-03-15
- Volume
- 15
- Issue
- 6
- Pages
- 724-736
- ISSN
- 0890-9369 (ISSN-L)
- 1549-5477
- OpenAlex
- W2148774147
- Cited by
- 250
- References
- 1
- Type
- posted content
- Language
- en
- Open access
- diamond
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- Kleczkowska, H. E., Marra, G., Lettieri, T., & Jiricny, J. (2001). hMSH3 and hMSH6 interact with PCNA and colocalize with it to replication foci. Genes & Development. https://doi.org/10.1101/gad.191201
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