title: The amino-terminal domain of yeast U1-70K is necessary and sufficient for function.
abstract: The Saccharomyces cerevisiae SNP1 gene encodes a protein that shares 30% amino acid identity with the mammalian U1 small nuclear ribonucleoprotein particle protein 70K (U1-70K). We have demonstrated that yeast strains in which the SNP1 gene was disrupted are viable but exhibit greatly increased doubling times and severe temperature sensitivity. Furthermore, snp1-null strains are defective in pre-mRNA splicing. We have tested deletion alleles of SNP1 for their ability to complement these phenotypes. We found that the highly conserved RNA recognition motif consensus domain of Snp1 is not required for complementation of the snp1-null growth or splicing defects nor for the in vivo association with the U1 small nuclear ribonucleoprotein particle. However, the amino-terminal domain of Snp1, less strongly conserved, is necessary and sufficient for complementation.
authors.affiliation: Department of Biochemistry, University of Minnesota, Minneapolis 55455, USA.
authors.forename: P J
authors.initials: PJ
authors.lastname: Hilleren
authors.forename: H Y
authors.initials: HY
authors.lastname: Kao
authors.forename: P G
authors.initials: PG
authors.lastname: Siliciano
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D017931:DNA Primers / Q000737:chemistry; D005656:Fungal Proteins / Q000737:chemistry; D005816:Genetic Complementation Test; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D012326:RNA Splicing; D012342:RNA, Small Nuclear / Q000378:metabolism*; D016601:RNA-Binding Proteins / Q000737:chemistry; D017412:Ribonucleoprotein, U1 Small Nuclear / Q000737:chemistry*; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D016415:Sequence Alignment; D017384:Sequence Deletion; D017386:Sequence Homology, Amino Acid; D013329:Structure-Activity Relationship
chemical_list: D017931:DNA Primers; D005656:Fungal Proteins; D012342:RNA, Small Nuclear; D016601:RNA-Binding Proteins; D017412:Ribonucleoprotein, U1 Small Nuclear; C096167:SNP1 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins