Abstract
For organisms, a fundamental problem is how the huge genome can be searched appropriately for DNA damage in order to prevent genome instability and/or cell death. In mammalian nucleotide excision repair (NER), this process involves multiple protein factors containing the xeroderma pigmentosum gene products (UV-DDB, XPC, TFIIH), which sense different aspects of DNA structural abnormalities, respectively. Coordinated stepwise actions of these factors contribute to simultaneous achievement of versatility, efficiency and accuracy of the DNA quality control for NER.
