Abstract
Two highly conserved regions of the 586-nucleotide yeast (Saccharomyces cerevisiae) U1 small nuclear RNA (snRNA) can be mutated or deleted with little or no effect on growth rate: the universally conserved loop II (corresponding to the metazoan A loop) and the yeast core region (X. Liao, L. Kretzner, B. Séraphin, and M. Rosbash, Genes Dev. 4:1766-1774, 1990). To examine the contribution of these regions to U1 small nuclear ribonucleoprotein particle (snRNP) activity, a competitor U1 gene, encoding a nonfunctional U1 snRNA molecule, was introduced into a number of strains carrying a U1 snRNA gene with loop II or yeast core mutations. The presence of the nonfunctional U1 gene lowered the growth rate of these mutant strains but not wild-type strains, consistent with the notion that mutant U1 RNAs are less active than wild-type U1 snRNAs. A detailed analysis of the U1 snRNA levels and half-lives in a number of merodiploid strains suggests that these mutant U1 snRNAs interact with U1 snRNP proteins less well than do their wild-type counterparts. Competition for protein factors during snRNP assembly could account for a number of previous observations in both yeast and mammalian cells.
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Selected References
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- Fabrizio P., McPheeters D. S., Abelson J. In vitro assembly of yeast U6 snRNP: a functional assay. Genes Dev. 1989 Dec;3(12B):2137–2150. doi: 10.1101/gad.3.12b.2137. [DOI] [PubMed] [Google Scholar]
- Guarente L., Yocum R. R., Gifford P. A GAL10-CYC1 hybrid yeast promoter identifies the GAL4 regulatory region as an upstream site. Proc Natl Acad Sci U S A. 1982 Dec;79(23):7410–7414. doi: 10.1073/pnas.79.23.7410. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hamm J., Darzynkiewicz E., Tahara S. M., Mattaj I. W. The trimethylguanosine cap structure of U1 snRNA is a component of a bipartite nuclear targeting signal. Cell. 1990 Aug 10;62(3):569–577. doi: 10.1016/0092-8674(90)90021-6. [DOI] [PubMed] [Google Scholar]
- Hamm J., Dathan N. A., Scherly D., Mattaj I. W. Multiple domains of U1 snRNA, including U1 specific protein binding sites, are required for splicing. EMBO J. 1990 Apr;9(4):1237–1244. doi: 10.1002/j.1460-2075.1990.tb08231.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hamm J., Kazmaier M., Mattaj I. W. In vitro assembly of U1 snRNPs. EMBO J. 1987 Nov;6(11):3479–3485. doi: 10.1002/j.1460-2075.1987.tb02672.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hamm J., Mattaj I. W. Monomethylated cap structures facilitate RNA export from the nucleus. Cell. 1990 Oct 5;63(1):109–118. doi: 10.1016/0092-8674(90)90292-m. [DOI] [PubMed] [Google Scholar]
- Heinrichs V., Bach M., Winkelmann G., Lührmann R. U1-specific protein C needed for efficient complex formation of U1 snRNP with a 5' splice site. Science. 1990 Jan 5;247(4938):69–72. doi: 10.1126/science.2136774. [DOI] [PubMed] [Google Scholar]
- Hernandez N. Formation of the 3' end of U1 snRNA is directed by a conserved sequence located downstream of the coding region. EMBO J. 1985 Jul;4(7):1827–1837. doi: 10.1002/j.1460-2075.1985.tb03857.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kretzner L., Krol A., Rosbash M. Saccharomyces cerevisiae U1 small nuclear RNA secondary structure contains both universal and yeast-specific domains. Proc Natl Acad Sci U S A. 1990 Jan;87(2):851–855. doi: 10.1073/pnas.87.2.851. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kretzner L., Rymond B. C., Rosbash M. S. cerevisiae U1 RNA is large and has limited primary sequence homology to metazoan U1 snRNA. Cell. 1987 Aug 14;50(4):593–602. doi: 10.1016/0092-8674(87)90032-8. [DOI] [PubMed] [Google Scholar]
- Liao X. L., Kretzner L., Seraphin B., Rosbash M. Universally conserved and yeast-specific U1 snRNA sequences are important but not essential for U1 snRNP function. Genes Dev. 1990 Oct;4(10):1766–1774. doi: 10.1101/gad.4.10.1766. [DOI] [PubMed] [Google Scholar]
- Mattaj I. W. Cap trimethylation of U snRNA is cytoplasmic and dependent on U snRNP protein binding. Cell. 1986 Sep 12;46(6):905–911. doi: 10.1016/0092-8674(86)90072-3. [DOI] [PubMed] [Google Scholar]
- Mattaj I. W., De Robertis E. M. Nuclear segregation of U2 snRNA requires binding of specific snRNP proteins. Cell. 1985 Jan;40(1):111–118. doi: 10.1016/0092-8674(85)90314-9. [DOI] [PubMed] [Google Scholar]
- McPheeters D. S., Fabrizio P., Abelson J. In vitro reconstitution of functional yeast U2 snRNPs. Genes Dev. 1989 Dec;3(12B):2124–2136. doi: 10.1101/gad.3.12b.2124. [DOI] [PubMed] [Google Scholar]
- Nelissen R. L., Heinrichs V., Habets W. J., Simons F., Lührmann R., van Venrooij W. J. Zinc finger-like structure in U1-specific protein C is essential for specific binding to U1 snRNP. Nucleic Acids Res. 1991 Feb 11;19(3):449–454. doi: 10.1093/nar/19.3.449. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Pikielny C. W., Rosbash M. mRNA splicing efficiency in yeast and the contribution of nonconserved sequences. Cell. 1985 May;41(1):119–126. doi: 10.1016/0092-8674(85)90066-2. [DOI] [PubMed] [Google Scholar]
- Schena M., Yamamoto K. R. Mammalian glucocorticoid receptor derivatives enhance transcription in yeast. Science. 1988 Aug 19;241(4868):965–967. doi: 10.1126/science.3043665. [DOI] [PubMed] [Google Scholar]
- Shulman R. W., Warner J. R. Ribosomal RNA transcription in a mutant of Saccharomyces cerevisiae defective in ribosomal protein synthesis. Mol Gen Genet. 1978 May 3;161(2):221–223. doi: 10.1007/BF00274191. [DOI] [PubMed] [Google Scholar]
- Siliciano P. G., Jones M. H., Guthrie C. Saccharomyces cerevisiae has a U1-like small nuclear RNA with unexpected properties. Science. 1987 Sep 18;237(4821):1484–1487. doi: 10.1126/science.3306922. [DOI] [PubMed] [Google Scholar]
- Siliciano P. G., Kivens W. J., Guthrie C. More than half of yeast U1 snRNA is dispensable for growth. Nucleic Acids Res. 1991 Dec 11;19(23):6367–6372. doi: 10.1093/nar/19.23.6367. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Struhl K., Stinchcomb D. T., Scherer S., Davis R. W. High-frequency transformation of yeast: autonomous replication of hybrid DNA molecules. Proc Natl Acad Sci U S A. 1979 Mar;76(3):1035–1039. doi: 10.1073/pnas.76.3.1035. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Séraphin B., Kretzner L., Rosbash M. A U1 snRNA:pre-mRNA base pairing interaction is required early in yeast spliceosome assembly but does not uniquely define the 5' cleavage site. EMBO J. 1988 Aug;7(8):2533–2538. doi: 10.1002/j.1460-2075.1988.tb03101.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Séraphin B., Rosbash M. Mutational analysis of the interactions between U1 small nuclear RNA and pre-mRNA of yeast. Gene. 1989 Oct 15;82(1):145–151. doi: 10.1016/0378-1119(89)90039-5. [DOI] [PubMed] [Google Scholar]
- Warner J. R., Udem S. A. Temperature sensitive mutations affecting ribosome synthesis in Saccharomyces cerevisiae. J Mol Biol. 1972 Mar 28;65(2):243–257. doi: 10.1016/0022-2836(72)90280-x. [DOI] [PubMed] [Google Scholar]
- Watanabe N., Ohshima Y. Three types of rat U1 small nuclear RNA genes with different flanking sequences are induced to express in vivo. Eur J Biochem. 1988 May 16;174(1):125–132. doi: 10.1111/j.1432-1033.1988.tb14071.x. [DOI] [PubMed] [Google Scholar]
- Yuo C. Y., Weiner A. M. Genetic analysis of the role of human U1 snRNA in mRNA splicing: I. Effect of mutations in the highly conserved stem-loop I of U1. Genes Dev. 1989 May;3(5):697–707. doi: 10.1101/gad.3.5.697. [DOI] [PubMed] [Google Scholar]