title: DNA damage-dependent recruitment of nucleotide excision repair and transcription proteins to Escherichia coli inner membranes.
abstract: The entire process of nucleotide excision repair (NER) in Escherichia coli has been reconstituted in vitro from purified proteins and defined DNA substrates. However, how this system is organized in vivo in unclear. We report here the isolation and characterization of macromolecular assemblies containing NER and transcription proteins from E. coli. This ensemble consists of at least 17 proteins. They are recruited, as a consequence of DNA damage induced by UV irradiation, to the inner membrane. The UV-induced 6-4 photoproducts are also relocated to the inner membrane following UV-irradiation of the cells. This recruitment process is dependent on the uvrA, uvrC and recA gene products. These results suggest that at least part of the repair process may associate with the inner membrane and also provide insights into understanding the cellular organization of repair processes.
authors.affiliation: Department of Biochemistry, Johns Hopkins University, School of Hygiene and Public Health, Baltimore, MD 21205, USA. lg@welchlink.welch.jhu.edu
authors.forename: C G
authors.initials: CG
authors.lastname: Lin
authors.forename: O
authors.initials: O
authors.lastname: Kovalsky
authors.forename: L
authors.initials: L
authors.lastname: Grossman
mesh_terms: D000251:Adenosine Triphosphatases / Q000096:biosynthesis / Q000378:metabolism*; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism; D002876:Chromosomes, Bacterial; D004249:DNA Damage; D004265:DNA Helicases; D004260:DNA Repair; D004268:DNA-Binding Proteins / Q000096:biosynthesis / Q000378:metabolism*; D004706:Endodeoxyribonucleases; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism* / Q000528:radiation effects / Q000648:ultrastructure; D029968:Escherichia coli Proteins; D009154:Mutation; D014158:Transcription, Genetic; D014466:Ultraviolet Rays
chemical_list: D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D029968:Escherichia coli Proteins; C058093:UvrB protein, E coli; D004706:Endodeoxyribonucleases; C066567:UvrC protein, E coli; C068631:UvrA protein, E coli; D000251:Adenosine Triphosphatases; D004265:DNA Helicases