Reconstitution of human DNA repair excision nuclease in a highly defined system.

Journal Article (Journal Article)

Xeroderma pigmentosum is a hereditary disease caused by defective DNA repair. Somatic cell genetics and biochemical studies with cell-free extracts indicate that at least 16 polypeptides are required to carry out the repair reaction proper, i.e. the removal of the lesion from the DNA by the dual incisions of the damaged strand. To find out if these proteins are necessary and sufficient for excision repair, they were obtained at a high level of purity in five fractions. The mixture of these five fractions reconstituted the excision nuclease (excinuclease) activity. Using the reconstituted excinuclease, we found that the excised fragment remains associated with the post-incision DNA-protein complex, suggesting that accessory proteins are needed to release the excised oligomer.

Full Text

Duke Authors

Cited Authors

  • Mu, D; Park, CH; Matsunaga, T; Hsu, DS; Reardon, JT; Sancar, A

Published Date

  • February 10, 1995

Published In

Volume / Issue

  • 270 / 6

Start / End Page

  • 2415 - 2418

PubMed ID

  • 7852297

Pubmed Central ID

  • 7852297

International Standard Serial Number (ISSN)

  • 0021-9258

Digital Object Identifier (DOI)

  • 10.1074/jbc.270.6.2415


  • eng

Conference Location

  • United States