A presumed DNA helicase encoded by ERCC-3 is involved in the human repair disorders xeroderma pigmentosum and Cockayne's syndrome

Geert Weeda*, Reinier C.A. van Ham, Wim Vermeulen, Dirk Bootsma, Alex J. van der Eb, Jan H.J. Hoeijmakers

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

426 Citations (Scopus)

Abstract

The human gene ERCC-3 specifically corrects the defect in an early step of the DNA excision repair pathway of UV-sensitive rodent mutants of complementation group 3. The predicted 782 amino acid ERCC-3 protein harbors putative nucleotide, chromatin, and helix-turn-helix DNA binding domains and seven consecutive motifs conserved between two superfamilies of DNA and RNA helicases, strongly suggesting that it is a DNA repair helicase. ERCC-3-deficient rodent mutants phenotypically resemble the human repair syndrome xeroderma pigmentosum (XP). ERCC-3 specifically corrects the excision defect in one of the eight XP complementation groups, XP-B. The sole XP-B patient presents an exceptional conjunction of two rare repair disorders: XP and Cockayne's syndrome. This patient's DNA contains a C→A transversion in the splice acceptor sequence of the last intron of the only ERCC-3 allele that is detectably expressed, leading to a 4 bp insertion in the mRNA and an inactivating frameshift in the C-terminus of the protein. Because XP is associated with predisposition to skin cancer, ERCC-3 can be considered a tumor-preventing gene.

Original languageEnglish
Pages (from-to)777-791
Number of pages15
JournalCell
Volume62
Issue number4
DOIs
Publication statusPublished - 24 Aug 1990

Bibliographical note

© 1990 Published by Elsevier Inc.

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