Expression of the p48 xeroderma pigmentosum gene is p53-dependent and is involved in global genomic repair | Zendy

Byung Joon Hwang | Zendy; James M. Ford | Zendy; Philip C. Hanawalt | Zendy; Gilbert Chu | Zendy

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Expression of the p48 xeroderma pigmentosum gene is p53-dependent and is involved in global genomic repair

Author(s) -

Byung Joon Hwang,

James M. Ford,

Philip C. Hanawalt,

Gilbert Chu

Publication year - 1999

Publication title -

proceedings of the national academy of sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.011

H-Index - 771

eISSN - 1091-6490

pISSN - 0027-8424

DOI - 10.1073/pnas.96.2.424

Subject(s) - xeroderma pigmentosum , dna repair , biology , nucleotide excision repair , dna damage , gene , genetics , genomic dna , dna , cancer research , suppressor , mutation , microbiology and biotechnology

In human cells, efficient global genomic repair of DNA damage induced by ultraviolet radiation requires the p53 tumor suppressor, but the mechanism has been unclear. The p48 gene is required for expression of an ultraviolet radiation-damaged DNA binding activity and is disrupted by mutations in the subset of xeroderma pigmentosum group E cells that lack this activity. Here, we show that p48 mRNA levels strongly depend on basal p53 expression and increase further after DNA damage in a p53-dependent manner. Furthermore, like p53(-/-) cells, xeroderma pigmentosum group E cells are deficient in global genomic repair. These results identify p48 as the link between p53 and the nucleotide excision repair apparatus.

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