Abstract
Primary DNA damage sensing in mammalian global genome nucleotide excision repair (GG-NER) is performed by the xeroderma pigmentosum group C (XPC)/HR23B protein complex. HR23B and HR23A are human homologs of the yeast ubiquitin-domain repair factor RAD23, the function of which is unknown. Knockout mice revealed thatmHR23AandmHR23Bhave a fully redundant role in NER, and a partially redundant function in embryonic development. Inactivation of both genes causes embryonic lethality, but appeared still compatible with cellular viability. Analysis ofmHR23A/Bdouble-mutant cells showed that HR23 proteins function in NER by governing XPC stability via partial protection against proteasomal degradation. Interestingly, NER-type DNA damage further stabilizes XPC and thereby enhances repair. These findings resolve the primary function of RAD23 in repair and reveal a novel DNA-damage-dependent regulation mechanism of DNA repair in eukaryotes, which may be part of a more global damage-response circuitry.
Bibliography
Ng, J. M. Y., Vermeulen, W., van der Horst, G. T. J., Bergink, S., Sugasawa, K., Vrieling, H., & Hoeijmakers, J. H. J. (2003). A novel regulation mechanism of DNA repair by damage-induced and RAD23-dependent stabilization of xeroderma pigmentosum group C protein. Genes & Development, 17(13), 1630â1645.
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Dates
Type | When |
---|---|
Created | 22 years, 2 months ago (June 23, 2003, 8:32 p.m.) |
Deposited | 3 years, 9 months ago (Nov. 15, 2021, 10:14 p.m.) |
Indexed | 1 week, 2 days ago (Aug. 29, 2025, 6:20 a.m.) |
Issued | 22 years, 2 months ago (June 18, 2003) |
Published | 22 years, 2 months ago (June 18, 2003) |
Published Online | 22 years, 2 months ago (June 18, 2003) |
Published Print | 22 years, 2 months ago (July 1, 2003) |
@article{Ng_2003, title={A novel regulation mechanism of DNA repair by damage-induced and RAD23-dependent stabilization of xeroderma pigmentosum group C protein}, volume={17}, ISSN={1549-5477}, url={http://dx.doi.org/10.1101/gad.260003}, DOI={10.1101/gad.260003}, number={13}, journal={Genes & Development}, publisher={Cold Spring Harbor Laboratory}, author={Ng, Jessica M.Y. and Vermeulen, Wim and van der Horst, Gijsbertus T.J. and Bergink, Steven and Sugasawa, Kaoru and Vrieling, Harry and Hoeijmakers, Jan H.J.}, year={2003}, month=jun, pages={1630–1645} }