The human Ski-interacting protein functionally substitutes for the yeast PRP45 gene.
The PRP45 gene has been identified as encoding a protein involved in mRNA splicing that is essential in Saccharomyces cerevisiae. PRP45's human homolog SKIP has been identified as a mediator of transcriptional programming in a variety of signal transduction pathways including TGFbeta, nuclear hormones, Notch, and retinoblastoma signaling. However, Skip has been also identified in purified spliceosomal complexes but an explicit role in splicing has not been identified in mammalian cells. To determine if the Skip protein could function as a splicing factor we investigated if the SKIP gene could functionally complement the yeast PRP45 gene. We show that SKIP complements the PRP45 deletion and rescues the lethal phenotype. These results show that the human SKIP gene can functionally substitute for the mRNA splicing gene PRP45 of S. cerevisiae.
Figueroa
Jonine D
JD
Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, NY 11794-5222, USA.
Hayman
Michael J
MJ
D000595:Amino Acid Sequence; D015966:Gene Expression Regulation, Fungal; D006238:Haploidy; D006801:Humans; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000378:metabolism*; D056918:Nuclear Receptor Coactivators; D012326:RNA Splicing; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000378:metabolism*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors
D009687:Nuclear Proteins; D056918:Nuclear Receptor Coactivators; C488197:PRP45 protein, S cerevisiae; C111791:SNW1 protein, human; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors