title: A novel nucleic acid-binding protein that interacts with human rad51 recombinase.
abstract: Using the yeast two-hybrid system, we isolated a cDNA encoding a novel human protein, named Pir51, that strongly interacts with human Rad51 recombinase. Analysis in vitro confirmed the interaction between Rad51 and Pir51. Pir51 mRNA is expressed in a number of human organs, most notably in testis, thymus, colon and small intestine. The Pir51 gene locus was mapped to chromosome 12p13.1-13. 2 by fluorescence in situ hybridization. The Pir51 protein was expressed in Escherichia coli and purified to near homogeneity. Biochemical analysis shows that the Pir51 protein binds both single- and double-stranded DNA, and is capable of aggregating DNA. The protein also binds RNA. The Pir51 protein may represent a new member of the multiprotein complexes postulated to carry out homologous recombination and DNA repair in mammalian cells.
authors.affiliation: Department of Genetics and Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06510, USA.
authors.forename: O V
authors.initials: OV
authors.lastname: Kovalenko
authors.forename: E I
authors.initials: EI
authors.lastname: Golub
authors.forename: P
authors.initials: P
authors.lastname: Bray-Ward
authors.forename: D C
authors.initials: DC
authors.lastname: Ward
authors.forename: C M
authors.initials: CM
authors.lastname: Radding
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002881:Chromosomes, Human, Pair 12 / Q000235:genetics; D004247:DNA / Q000378:metabolism; D018076:DNA, Complementary / Q000235:genetics; D004268:DNA-Binding Proteins / Q000096:biosynthesis / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D005796:Genes; D006367:HeLa Cells; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008969:Molecular Sequence Data; D009928:Organ Specificity; D011485:Protein Binding; D012313:RNA / Q000378:metabolism; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D016601:RNA-Binding Proteins; D051135:Rad51 Recombinase; D011995:Recombination, Genetic; D012441:Saccharomyces cerevisiae; D029701:Saccharomyces cerevisiae Proteins
chemical_list: D018076:DNA, Complementary; D004268:DNA-Binding Proteins; C110410:RAD51AP1 protein, human; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; D029701:Saccharomyces cerevisiae Proteins; D012313:RNA; D004247:DNA; C495151:RAD51 protein, S cerevisiae; C495153:RAD51 protein, human; D051135:Rad51 Recombinase