Other search tools

About this data

The publication data currently available has been vetted by Vanderbilt faculty, staff, administrators and trainees. The data itself is retrieved directly from NCBI's PubMed and is automatically updated on a weekly basis to ensure accuracy and completeness.

If you have any questions or comments, please contact us.

Results: 11 to 12 of 12

Publication Record


Characterization of interactions among the Cef1p-Prp19p-associated splicing complex.
Ohi MD, Gould KL
(2002) RNA 8: 798-815
MeSH Terms: Amino Acid Sequence, Base Sequence, Cell Cycle Proteins, DNA Primers, Fungal Proteins, Molecular Sequence Data, RNA Splicing, RNA Splicing Factors, RNA-Binding Proteins, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins, Schizosaccharomyces pombe Proteins, Sequence Homology, Amino Acid, Spliceosomes, Two-Hybrid System Techniques
Show Abstract · Added March 5, 2014
Schizosaccharomyces pombe (Sp) Cdc5p and its Saccharomyces cerevisiae (Sc) ortholog, Cef1p, are essential components of the spliceosome. In S. cerevisiae, a subcomplex of the spliceosome that includes Cef1p can be isolated on its own; this has been termed the nineteen complex (Ntc) because it contains Prp19p. Components of the Ntc include Cef1p, Snt309p, Syf2p/Ntc31p, Ntc30p/lsy1p, Ntc20p and at least six unidentified proteins. We recently identified approximately 30 proteins that copurified with Cdc5p and Cef1p. Previously unidentified S. pombe proteins in this purification were called Cwfs for complexed with five and novel S. cerevisiae proteins were called Cwcs for complexed with Cef1p. Using these proteomics data coupled with available information regarding Ntc composition, we have investigated protein identities and interactions among Ntc components. Our data indicate that Cwc2p, Prp46p, Clf1p, and Syf1p most likely represent Ntc40p, Ntc50p, Ntc77p, and Ntc90p, respectively. We show that Sc Cwc2p interacts with Prp19p and is involved in pre-mRNA splicing. Sp cwf2+, the homolog of Sc CWC2, is allelic with the previously identified Sp prp3+. We present evidence that Sp Cwf7p, an essential protein with obvious homologs in many eukaryotes but not S. cerevisiae, is a functional counterpart of Sc Snt309p and binds Sp Cwf8p (a homolog of Sc Prp19p). Further, our data indicate that a mutation in the U-box of Prp19p disrupts these numerous protein interactions causing Cef1p degradation and Ntc instability.
0 Communities
3 Members
0 Resources
15 MeSH Terms
Removal of a single alpha-tubulin gene intron suppresses cell cycle arrest phenotypes of splicing factor mutations in Saccharomyces cerevisiae.
Burns CG, Ohi R, Mehta S, O'Toole ET, Winey M, Clark TA, Sugnet CW, Ares M, Gould KL
(2002) Mol Cell Biol 22: 801-15
MeSH Terms: Base Sequence, Cell Cycle, Cell Cycle Proteins, DEAD-box RNA Helicases, DNA, Fungal, DNA-Binding Proteins, Fungal Proteins, Genes, Fungal, Introns, Microtubules, Mitosis, Mutation, Phenotype, Protein Kinases, Protein-Serine-Threonine Kinases, RNA Helicases, RNA Precursors, RNA Splicing, RNA Splicing Factors, RNA, Fungal, RNA, Messenger, RNA-Binding Proteins, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins, Schizosaccharomyces pombe Proteins, Temperature, Tubulin
Show Abstract · Added March 5, 2014
Genetic and biochemical studies of Schizosaccharomyces pombe and Saccharomyces cerevisiae have identified gene products that play essential functions in both pre-mRNA splicing and cell cycle control. Among these are the conserved, Myb-related CDC5 (also known as Cef1p in S. cerevisiae) proteins. The mechanism by which loss of CDC5/Cef1p function causes both splicing and cell cycle defects has been unclear. Here we provide evidence that cell cycle arrest in a new temperature-sensitive CEF1 mutant, cef1-13, is an indirect consequence of defects in pre-mRNA splicing. Although cef1-13 cells harbor global defects in pre-mRNA splicing discovered through intron microarray analysis, inefficient splicing of the alpha-tubulin-encoding TUB1 mRNA was considered as a potential cause of the cef1-13 cell cycle arrest because cef1-13 cells arrest uniformly at G(2)/M with many hallmarks of a defective microtubule cytoskeleton. Consistent with this possibility, cef1-13 cells possess reduced levels of total TUB1 mRNA and alpha-tubulin protein. Removing the intron from TUB1 in cef1-13 cells boosts TUB1 mRNA and alpha-tubulin expression to near wild-type levels and restores microtubule stability in the cef1-13 mutant. As a result, cef1-13 tub1Deltai cells progress through mitosis and their cell cycle arrest phenotype is alleviated. Removing the TUB1 intron from two other splicing mutants that arrest at G(2)/M, prp17Delta and prp22-1 strains, permits nuclear division, but suppression of the cell cycle block is less efficient. Our data raise the possibility that although cell cycle arrest phenotypes in prp mutants can be explained by defects in pre-mRNA splicing, the transcript(s) whose inefficient splicing contributes to cell cycle arrest is likely to be prp mutant dependent.
0 Communities
2 Members
0 Resources
27 MeSH Terms