Nucleotide excision repair (NER) removes UV-induced photoproducts and numerous other DNA lesions in a highly conserved 'cut-and-paste' reaction that involves approximately 25 core components. In addition, several other proteins have been identified which are dispensable for NER in vitro but have an undefined role in vivo and may act at the interface of NER and other cellular processes. An intriguing example is the Saccharomyces cerevisiae Mms19 protein that has an unknown dual function in NER and RNA polymerase II transcription. Here we report the cloning and characterization of a human homolog, designated hMMS19, that encodes a 1030 amino acid protein with 26% identity and 51% similarity to S.cerevisiae Mms19p and with a strikingly similar size. The expression profile and nuclear location are consistent with a repair function. Co-immunoprecipitation experiments revealed that hMMS19 directly interacts with the XPB and XPD subunits of NER-transcription factor TFIIH. These findings extend the conservation of the NER apparatus and the link between NER and basal transcription and suggest that hMMS19 exerts its function in repair and transcription by interacting with the XPB and XPD helicases.

*Saccharomyces cerevisiae Proteins, *TATA-Binding Protein Associated Factors, *Transcription Factor TFIID, *Transcription Factors, TFII, Amino Acid Sequence, Animals, Blotting, Northern, Cell Line, Chromosome Mapping, Chromosomes, Human, Pair 10/genetics, Cloning, Molecular, DNA Helicases/*metabolism, DNA Repair/*genetics, DNA, Complementary/chemistry/genetics, DNA-Binding Proteins/metabolism, Female, Fungal Proteins/genetics, Gene Expression, Gene Expression Regulation, Developmental, Hela Cells, Humans, In Situ Hybridization, Fluorescence, Male, Molecular Sequence Data, Phylogeny, Protein Binding, Proteins/*genetics/metabolism, RNA, Messenger/genetics/metabolism, Research Support, Non-U.S. Gov't, Sequence Alignment, Sequence Analysis, DNA, Sequence Homology, Amino Acid, Tissue Distribution, Transcription Factor TFIIH, Transcription Factors/*metabolism, Xeroderma Pigmentosum Group D Protein
Nucleic Acids Research
Erasmus MC: University Medical Center Rotterdam

Seroz, T, Winkler, G.S, Auriol, J, Verhage, R.A, Vermeulen, W, Smit, B, … Egly, J-M. (2000). Cloning of a human homolog of the yeast nucleotide excision repair gene MMS19 and interaction with transcription repair factor TFIIH via the XPB and XPD helicases. Nucleic Acids Research. Retrieved from