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Cited by 366

The DOI matches its Crossref record; 33 of the 33 references it cites were found in a registry or an index.

PCNA-dependent regulation of p21 ubiquitylation and degradation via the CRL4Cdt2 ubiquitin ligase complex

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Abbas, Tarek, Sivaprasad, Uma, Terai, Kenta, Amador, Virginia, Pagano, Michele, Dutta, Anindya·2008·Genes & Development

Abstract

The DNA polymerase delta processivity factor Proliferating Cell Nuclear Antigen (PCNA) promotes the DNA damage-induced degradation of the replication initiation factor Cdt1 via the CRL4 Cdt2 E3 ubiquitin ligase complex. Here we demonstrate that PCNA promotes the ubiquitylation and degradation of the CDK inhibitor p21 in cells irradiated with low dose of ultraviolet (UV) by a similar mechanism. Human cells that are depleted of Cul4, DDB1 (damage-specific DNA-binding protein-1), or the DCAF Cdt2, are deficient in the UV-induced ubiquitylation and degradation of p21. Depletion of mammalian cells of PCNA by siRNA, or mutations in p21 that abrogate PCNA binding, prevent UV-induced p21 ubiquitylation and degradation, indicating that physical binding with PCNA is necessary for the efficient ubiquitylation of p21 via the CRL4 Cdt2 ubiquitin ligase. Cdt2 functions as the substrate recruiting factor for p21 to the rest of the CRL4 ubiquitin ligase complex. The CRL4 Cdt2 E3 ubiquitin ligase ubiquitylates p21 both in vivo and in vitro, and its activity is dependent on the interaction of p21 with PCNA. Finally, we show that the CRL4 Cdt2 and the SCF Skp2 ubiquitin ligases are redundant with each other in promoting the degradation of p21 during an unperturbed S phase of the cell cycle.

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Metadata

Authors
Abbas, T., Sivaprasad, U., Terai, K., Amador, V., Pagano, M., & Dutta, A.
Venue
Genes & Development
Published
2008-09-15
Volume
22
Issue
18
Pages
2496-2506
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2113126688
Cited by
366
References
33
Type
posted content
Language
en
Open access
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CoChat. (2026). Citation check: PCNA-dependent regulation of p21 ubiquitylation and degradation via the CRL4Cdt2 ubiquitin ligase complex. https://app.cochat.ai/papers/10.1101/gad.1676108
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Abbas, T., Sivaprasad, U., Terai, K., Amador, V., Pagano, M., & Dutta, A. (2008). PCNA-dependent regulation of p21 ubiquitylation and degradation via the CRL4Cdt2 ubiquitin ligase complex. Genes & Development. https://doi.org/10.1101/gad.1676108

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