Mutational analysis of the human nucleotide excision repair gene ERCC1

被引:92
作者
Sijbers, AM [1 ]
vanderSpek, PJ [1 ]
Odijk, H [1 ]
vandenBerg, J [1 ]
vanDuin, M [1 ]
Westerveld, A [1 ]
Jaspers, NGJ [1 ]
Bootsma, D [1 ]
Hoeijmakers, JHJ [1 ]
机构
[1] ERASMUS UNIV ROTTERDAM,DEPT CELL BIOL & GENET,CTR MED GENET,NL-3000 DR ROTTERDAM,NETHERLANDS
关键词
D O I
10.1093/nar/24.17.3370
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The human DNA repair protein ERCC1 resides in a complex together with the ERCC4, ERCC11 and XP-F correcting activities, thought to perform the 5' strand incision during nucleotide excision repair (NER), Its yeast counterpart, RAD1-RAD10, has an additional engagement in a mitotic recombination pathway, probably required for repair of DNA cross-links, Mutational analysis revealed that the poorly conserved N-terminal 91 amino acids of ERCC1 are dispensable far both repair functions, in contrast to a deletion of only four residues from the C-terminus, A database Search revealed a strongly conserved motif in this sharing sequence homology with many DNA break processing proteins; indicating that this part is primarily required for the presumed structure-specific endonuclease activity of ERCC1. Most missense mutations in the central region give rise to an unstable protein (complex), Accordingly, we found that free ERCC1 is very rapidly degraded, suggesting that protein-protein interactions provide stability. Survival experiments show that the removal of cross-links requires less ERCC1 than UV repair, This suggests that the ERCC1-dependent step in cross-link repair occurs outside the context of NER and provides an explanation for the phenotype of the human repair syndrome xeroderma pigmentosum group F.
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页码:3370 / 3380
页数:11
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