title: XPG protein has a structure-specific endonuclease activity.
abstract: Biochemically active human DNA repair protein, xeroderma pigmentosum G (XPG), was overexpressed in insect cells by a recombinant baculovirus. The recombinant baculovirus produced XPG with a mobility of approximately 185 kDa in a denaturing polyacrylamide gel. Indirect immunofluorescence studies demonstrated that the recombinant full-length XPG protein was expressed predominantly as a nuclear protein. The recombinant XPG protein was purified to apparent homogeneity using Q-sepharose, S-300 size exclusion, and Mono Q column chromatography. XPG protein showed a structure-specific DNA endonuclease activity, and a preferential affinity to single-stranded DNA and RNA compared to double-stranded DNA.
authors.affiliation: Life Sciences Division, Los Alamos National Laboratory, NM 87545, USA.
authors.forename: K G
authors.initials: KG
authors.lastname: Cloud
authors.forename: B
authors.initials: B
authors.lastname: Shen
authors.forename: G F
authors.initials: GF
authors.lastname: Strniste
authors.forename: M S
authors.initials: MS
authors.lastname: Park
mesh_terms: D000818:Animals; D001483:Base Sequence; D002478:Cells, Cultured; D004260:DNA Repair; D004268:DNA-Binding Proteins / Q000378:metabolism*; D004720:Endonucleases / Q000378:metabolism*; D005822:Genetic Vectors; D008856:Microscopy, Fluorescence; D008969:Molecular Sequence Data; D009687:Nuclear Proteins; D018411:Spodoptera; D014157:Transcription Factors; D014983:Xeroderma Pigmentosum / Q000201:enzymology* / Q000235:genetics; D000099250:DNA Excision Repair Protein ERCC-5
chemical_list: D004268:DNA-Binding Proteins; D004720:Endonucleases; D009687:Nuclear Proteins; D014157:Transcription Factors; D000099250:DNA Excision Repair Protein ERCC-5