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. 2002 Oct;42(1):9-20.
doi: 10.1007/s00294-002-0332-9. Epub 2002 Oct 11.

Proteolysis of a nucleotide excision repair protein by the 26 S proteasome

Lori Lommel  1 , Tatiana Ortolan, Li Chen, Kiran Madura, Kevin S Sweder
Affiliations

Proteolysis of a nucleotide excision repair protein by the 26 S proteasome

Lori Lommel et al. Curr Genet. 2002 Oct.

Abstract

The 26 S proteasome degrades a broad spectrum of proteins and interacts with several nucleotide excision repair (NER) proteins, including the complex of Rad4 and Rad23 that binds preferentially to UV-damaged DNA. The rate of NER is increased in yeast strains with mutations in genes encoding subunits of the 26 S proteasome, indicating that it could negatively regulate a repair process. The specific function of the 26 S proteasome in DNA repair is unclear. It might degrade DNA repair proteins after repair is completed or act as a molecular chaperone to promote the assembly or disassembly of the repair complex. In this study, we show that Rad4 is ubiquitylated and that Rad23 can control this process. We also find that ubiquitylated Rad4 is degraded by the 26 S proteasome. However, the interaction of Rad23 with Rad4 is not only to control degradation of Rad4, but also to assist in assembling the NER incision complex at UV-induced cyclobutane pyrimidine dimers. We speculate that, following the completion of DNA repair, specific repair proteins might be degraded by the proteasome to regulate repair.

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References

    1. Proc Natl Acad Sci U S A. 1980 Apr;77(4):2119-23 - PubMed
    1. J Biol Chem. 1995 Feb 10;270(6):2415-8 - PubMed
    1. J Biol Chem. 1996 Aug 9;271(32):19451-6 - PubMed
    1. J Biol Chem. 1994 Jan 21;269(3):1852-7 - PubMed
    1. Nat Cell Biol. 1999 Aug;1(4):221-6 - PubMed

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