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Synthetic lethality of yeast slt mutations with U2 small nuclear RNA mutations suggests functional interactions between U2 and U5 snRNPs that are important for both steps of pre-mRNA splicing.
Mol Cell Biol. 1998 Apr; 18(4):2055-66.MC

Abstract

A genetic screen was devised to identify Saccharomyces cerevisiae splicing factors that are important for the function of the 5' end of U2 snRNA. Six slt (stands for synthetic lethality with U2) mutants were isolated on the basis of synthetic lethality with a U2 snRNA mutation that perturbs the U2-U6 snRNA helix II interaction. SLT11 encodes a new splicing factor and SLT22 encodes a new RNA-dependent ATPase RNA helicase (D. Xu, S. Nouraini, D. Field, S. J. Tang, and J. D. Friesen, Nature 381:709-713, 1996). The remaining four slt mutations are new alleles of previously identified splicing genes: slt15, previously identified as prp17 (slt15/prp17-100), slt16/smd3-1, slt17/slu7-100, and slt21/prp8-21. slt11-1 and slt22-1 are synthetically lethal with mutations in the 3' end of U6 snRNA, a region that affects U2-U6 snRNA helix II; however, slt17/slu7-100 and slt21/prp8-21 are not. This difference suggests that the latter two factors are unlikely to be involved in interactions with U2-U6 snRNA helix II but rather are specific to interactions with U2 snRNA. Pairwise synthetic lethality was observed among slt11-1 (which affects the first step of splicing) and several second-step factors, including slt15/prp17-100, slt17/slu7-100, and prp16-1. Mutations in loop 1 of U5 snRNA, a region that is implicated in the alignment of the two exons, are synthetically lethal with slu4/prp17-2 and slu7-1 (D. Frank, B. Patterson, and C. Guthrie, Mol. Cell. Biol. 12:5179-5205, 1992), as well as with slt11-1, slt15/prp17-100, slt17/slu7-100, and slt21/prp8-21. These same U5 snRNA mutations also interact genetically with certain U2 snRNA mutations that lie in the helix I and helix II regions of the U2-U6 snRNA structure. Our results suggest interactions among U2 snRNA, U5 snRNA, and Slt protein factors that may be responsible for coupling and coordination of the two reactions of pre-mRNA splicing.

Authors+Show Affiliations

Banting and Best Department of Medical Research, University of Toronto, Ontario, Canada.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9528778

Citation

Xu, D, et al. "Synthetic Lethality of Yeast Slt Mutations With U2 Small Nuclear RNA Mutations Suggests Functional Interactions Between U2 and U5 snRNPs That Are Important for Both Steps of pre-mRNA Splicing." Molecular and Cellular Biology, vol. 18, no. 4, 1998, pp. 2055-66.
Xu D, Field DJ, Tang SJ, et al. Synthetic lethality of yeast slt mutations with U2 small nuclear RNA mutations suggests functional interactions between U2 and U5 snRNPs that are important for both steps of pre-mRNA splicing. Mol Cell Biol. 1998;18(4):2055-66.
Xu, D., Field, D. J., Tang, S. J., Moris, A., Bobechko, B. P., & Friesen, J. D. (1998). Synthetic lethality of yeast slt mutations with U2 small nuclear RNA mutations suggests functional interactions between U2 and U5 snRNPs that are important for both steps of pre-mRNA splicing. Molecular and Cellular Biology, 18(4), 2055-66.
Xu D, et al. Synthetic Lethality of Yeast Slt Mutations With U2 Small Nuclear RNA Mutations Suggests Functional Interactions Between U2 and U5 snRNPs That Are Important for Both Steps of pre-mRNA Splicing. Mol Cell Biol. 1998;18(4):2055-66. PubMed PMID: 9528778.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synthetic lethality of yeast slt mutations with U2 small nuclear RNA mutations suggests functional interactions between U2 and U5 snRNPs that are important for both steps of pre-mRNA splicing. AU - Xu,D, AU - Field,D J, AU - Tang,S J, AU - Moris,A, AU - Bobechko,B P, AU - Friesen,J D, PY - 1998/4/7/pubmed PY - 1998/4/7/medline PY - 1998/4/7/entrez SP - 2055 EP - 66 JF - Molecular and cellular biology JO - Mol Cell Biol VL - 18 IS - 4 N2 - A genetic screen was devised to identify Saccharomyces cerevisiae splicing factors that are important for the function of the 5' end of U2 snRNA. Six slt (stands for synthetic lethality with U2) mutants were isolated on the basis of synthetic lethality with a U2 snRNA mutation that perturbs the U2-U6 snRNA helix II interaction. SLT11 encodes a new splicing factor and SLT22 encodes a new RNA-dependent ATPase RNA helicase (D. Xu, S. Nouraini, D. Field, S. J. Tang, and J. D. Friesen, Nature 381:709-713, 1996). The remaining four slt mutations are new alleles of previously identified splicing genes: slt15, previously identified as prp17 (slt15/prp17-100), slt16/smd3-1, slt17/slu7-100, and slt21/prp8-21. slt11-1 and slt22-1 are synthetically lethal with mutations in the 3' end of U6 snRNA, a region that affects U2-U6 snRNA helix II; however, slt17/slu7-100 and slt21/prp8-21 are not. This difference suggests that the latter two factors are unlikely to be involved in interactions with U2-U6 snRNA helix II but rather are specific to interactions with U2 snRNA. Pairwise synthetic lethality was observed among slt11-1 (which affects the first step of splicing) and several second-step factors, including slt15/prp17-100, slt17/slu7-100, and prp16-1. Mutations in loop 1 of U5 snRNA, a region that is implicated in the alignment of the two exons, are synthetically lethal with slu4/prp17-2 and slu7-1 (D. Frank, B. Patterson, and C. Guthrie, Mol. Cell. Biol. 12:5179-5205, 1992), as well as with slt11-1, slt15/prp17-100, slt17/slu7-100, and slt21/prp8-21. These same U5 snRNA mutations also interact genetically with certain U2 snRNA mutations that lie in the helix I and helix II regions of the U2-U6 snRNA structure. Our results suggest interactions among U2 snRNA, U5 snRNA, and Slt protein factors that may be responsible for coupling and coordination of the two reactions of pre-mRNA splicing. SN - 0270-7306 UR - https://www.unboundmedicine.com/medline/citation/9528778/Synthetic_lethality_of_yeast_slt_mutations_with_U2_small_nuclear_RNA_mutations_suggests_functional_interactions_between_U2_and_U5_snRNPs_that_are_important_for_both_steps_of_pre_mRNA_splicing_ L2 - https://journals.asm.org/doi/10.1128/MCB.18.4.2055?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -