Nucleic Acids Research, 1988, Vol. 16, No. 12 5305-5322
© 1988
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Evolution and mutagenesis of the mammalian excision repair gene ERCC-1
Department of Cell Biology and Genetics, Erasmus University PO Box 1738, 3000 DR Rotterdam, The Netherlands
Received April 7, 1988. Revised May 19, 1988. Accepted May 19, 1988.
The human DNA excision repair protein ERCC-1 exhibits homology to the yeast RAD10 repair protein and its longer c-terminus displays similarity to parts of the E.coli repair proteins uvrA and uvrC. To study the evolution of this mosaic ERCC-1 gene we have isolated the mouse homologue. Mouse ERCC-1 harbors the same pattern of homology with RAD10 and has a comparable C-terminal extension as its human equivalent. Mutation studies show that the strongly conserved C-terminus is essential in contrast to the less conserved N-terminus which is even dispensible. The mouse ERCC-1 amino acid sequence is compatible with a previously postulated nuclear location signal and DNA-binding domain. The ERCC-1 promoter harbors a region which is highly conserved in mouse and man. Since the ERCC-1 promoter is devoid of all classical promoter elements this region may be responsible for the low constitutive level of expression in all mouse tissues and stages of embryogenesis examined.
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