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. 1989 Aug;9(8):3360–3368. doi: 10.1128/mcb.9.8.3360

U1 small nuclear ribonucleoprotein particle-specific proteins interact with the first and second stem-loops of U1 RNA, with the A protein binding directly to the RNA independently of the 70K and Sm proteins.

J R Patton 1, W Habets 1, W J van Venrooij 1, T Pederson 1
PMCID: PMC362381  PMID: 2529425

Abstract

The U1 small nuclear ribonucleoprotein particle (U1 snRNP), a cofactor in pre-mRNA splicing, contains three proteins, termed 70K, A, and C, that are not present in the other spliceosome-associated snRNPs. We studied the binding of the A and C proteins to U1 RNA, using a U1 snRNP reconstitution system and an antibody-induced nuclease protection technique. Antibodies that reacted with the A and C proteins induced nuclease protection of the first two stem-loops of U1 RNA in reconstituted U1 snRNP. Detailed analysis of the antibody-induced nuclease protection patterns indicated the existence of relatively long-range protein-protein interactions in the U1 snRNP, with the 5' end of U1 RNA and its associated specific proteins interacting with proteins bound to the Sm domain near the 3' end. UV cross-linking experiments in conjunction with an A-protein-specific antibody demonstrated that the A protein bound directly to the U1 RNA rather than assembling in the U1 snRNP exclusively via protein-protein interactions. This conclusion was supported by additional experiments revealing that the A protein could bind to U1 RNA in the absence of bound 70K and Sm core proteins.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Agris P. F., KiKuchi Y., Gross H. J., Takano M., Sharp G. C. Characterization of the autoimmune antigenic determinant for ribonucleoprotein (RNP) antibody. Immunol Commun. 1984;13(2):137–149. doi: 10.3109/08820138409025457. [DOI] [PubMed] [Google Scholar]
  2. Billings P. B., Allen R. W., Jensen F. C., Hoch S. O. Anti-RNP monoclonal antibodies derived from a mouse strain with lupus-like autoimmunity. J Immunol. 1982 Mar;128(3):1176–1180. [PubMed] [Google Scholar]
  3. Billings P. B., Hoch S. O. Characterization of U small nuclear RNA-associated proteins. J Biol Chem. 1984 Oct 25;259(20):12850–12856. [PubMed] [Google Scholar]
  4. Black D. L., Chabot B., Steitz J. A. U2 as well as U1 small nuclear ribonucleoproteins are involved in premessenger RNA splicing. Cell. 1985 Oct;42(3):737–750. doi: 10.1016/0092-8674(85)90270-3. [DOI] [PubMed] [Google Scholar]
  5. Bringmann P., Lührmann R. Purification of the individual snRNPs U1, U2, U5 and U4/U6 from HeLa cells and characterization of their protein constituents. EMBO J. 1986 Dec 20;5(13):3509–3516. doi: 10.1002/j.1460-2075.1986.tb04676.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Davies D. R., Sheriff S., Padlan E. A. Antibody-antigen complexes. J Biol Chem. 1988 Aug 5;263(22):10541–10544. [PubMed] [Google Scholar]
  7. Habets W. J., de Rooij D. J., Salden M. H., Verhagen A. P., van Eekelen C. A., van de Putte L. B., van Venrooij W. J. Antibodies against distinct nuclear matrix proteins are characteristic for mixed connective tissue disease. Clin Exp Immunol. 1983 Oct;54(1):265–276. [PMC free article] [PubMed] [Google Scholar]
  8. Habets W. J., den Brok J. H., Boerbooms A. M., van de Putte L. B., van Venrooij W. J. Characterization of the SS-B (La) antigen in adenovirus-infected and uninfected HeLa cells. EMBO J. 1983;2(10):1625–1631. doi: 10.1002/j.1460-2075.1983.tb01636.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. 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]
  10. Hamm J., van Santen V. L., Spritz R. A., Mattaj I. W. Loop I of U1 small nuclear RNA is the only essential RNA sequence for binding of specific U1 small nuclear ribonucleoprotein particle proteins. Mol Cell Biol. 1988 Nov;8(11):4787–4791. doi: 10.1128/mcb.8.11.4787. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Hinterberger M., Pettersson I., Steitz J. A. Isolation of small nuclear ribonucleoproteins containing U1, U2, U4, U5, and U6 RNAs. J Biol Chem. 1983 Feb 25;258(4):2604–2613. [PubMed] [Google Scholar]
  12. Kastner B., Lührmann R. Electron microscopy of U1 small nuclear ribonucleoprotein particles: shape of the particle and position of the 5' RNA terminus. EMBO J. 1989 Jan;8(1):277–286. doi: 10.1002/j.1460-2075.1989.tb03374.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Kinlaw C. S., Robberson B. L., Berget S. M. Fractionation and characterization of human small nuclear ribonucleoproteins containing U1 and U2 RNAs. J Biol Chem. 1983 Jun 10;258(11):7181–7189. [PubMed] [Google Scholar]
  14. Krämer A., Keller W., Appel B., Lührmann R. The 5' terminus of the RNA moiety of U1 small nuclear ribonucleoprotein particles is required for the splicing of messenger RNA precursors. Cell. 1984 Aug;38(1):299–307. doi: 10.1016/0092-8674(84)90551-8. [DOI] [PubMed] [Google Scholar]
  15. Laemmli U. K. Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature. 1970 Aug 15;227(5259):680–685. doi: 10.1038/227680a0. [DOI] [PubMed] [Google Scholar]
  16. Lerner E. A., Lerner M. R., Janeway C. A., Jr, Steitz J. A. Monoclonal antibodies to nucleic acid-containing cellular constituents: probes for molecular biology and autoimmune disease. Proc Natl Acad Sci U S A. 1981 May;78(5):2737–2741. doi: 10.1073/pnas.78.5.2737. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Lerner M. R., Steitz J. A. Antibodies to small nuclear RNAs complexed with proteins are produced by patients with systemic lupus erythematosus. Proc Natl Acad Sci U S A. 1979 Nov;76(11):5495–5499. doi: 10.1073/pnas.76.11.5495. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Liautard J. P., Sri-Widada J., Brunel C., Jeanteur P. Structural organization of ribonucleoproteins containing small nuclear RNAs from HeLa cells. Proteins interact closely with a similar structural domain of U1, U2, U4 and U5 small nuclear RNAs. J Mol Biol. 1982 Dec 15;162(3):623–643. doi: 10.1016/0022-2836(82)90392-8. [DOI] [PubMed] [Google Scholar]
  19. Lin W. L., Pederson T. Ribonucleoprotein organization of eukaryotic RNA. XXXI. Structure of the U1 small nuclear ribonucleoprotein. J Mol Biol. 1984 Dec 25;180(4):947–960. doi: 10.1016/0022-2836(84)90265-1. [DOI] [PubMed] [Google Scholar]
  20. 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]
  21. 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]
  22. Mayrand S., Pederson T. Nuclear ribonucleoprotein particles probed in living cells. Proc Natl Acad Sci U S A. 1981 Apr;78(4):2208–2212. doi: 10.1073/pnas.78.4.2208. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Mount S. M., Pettersson I., Hinterberger M., Karmas A., Steitz J. A. The U1 small nuclear RNA-protein complex selectively binds a 5' splice site in vitro. Cell. 1983 Jun;33(2):509–518. doi: 10.1016/0092-8674(83)90432-4. [DOI] [PubMed] [Google Scholar]
  24. Patton J. R., Patterson R. J., Pederson T. Reconstitution of the U1 small nuclear ribonucleoprotein particle. Mol Cell Biol. 1987 Nov;7(11):4030–4037. doi: 10.1128/mcb.7.11.4030. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Patton J. R., Pederson T. The Mr 70,000 protein of the U1 small nuclear ribonucleoprotein particle binds to the 5' stem-loop of U1 RNA and interacts with Sm domain proteins. Proc Natl Acad Sci U S A. 1988 Feb;85(3):747–751. doi: 10.1073/pnas.85.3.747. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Pettersson I., Hinterberger M., Mimori T., Gottlieb E., Steitz J. A. The structure of mammalian small nuclear ribonucleoproteins. Identification of multiple protein components reactive with anti-(U1)ribonucleoprotein and anti-Sm autoantibodies. J Biol Chem. 1984 May 10;259(9):5907–5914. [PubMed] [Google Scholar]
  27. Reveillaud I., Lelay-Taha M. N., Sri-Widada J., Brunel C., Jeanteur P. Mg2+ induces a sharp and reversible transition in U1 and U2 small nuclear ribonucleoprotein configurations. Mol Cell Biol. 1984 Sep;4(9):1890–1899. doi: 10.1128/mcb.4.9.1890. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Silberklang M., Gillum A. M., RajBhandary U. L. Use of in vitro 32P labeling in the sequence analysis of nonradioactive tRNAs. Methods Enzymol. 1979;59:58–109. doi: 10.1016/0076-6879(79)59072-7. [DOI] [PubMed] [Google Scholar]
  29. Sillekens P. T., Beijer R. P., Habets W. J., van Venrooij W. J. Human U1 snRNP-specific C protein: complete cDNA and protein sequence and identification of a multigene family in mammals. Nucleic Acids Res. 1988 Sep 12;16(17):8307–8321. doi: 10.1093/nar/16.17.8307. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Sillekens P. T., Habets W. J., Beijer R. P., van Venrooij W. J. cDNA cloning of the human U1 snRNA-associated A protein: extensive homology between U1 and U2 snRNP-specific proteins. EMBO J. 1987 Dec 1;6(12):3841–3848. doi: 10.1002/j.1460-2075.1987.tb02721.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. Spritz R. A., Strunk K., Surowy C. S., Hoch S. O., Barton D. E., Francke U. The human U1-70K snRNP protein: cDNA cloning, chromosomal localization, expression, alternative splicing and RNA-binding. Nucleic Acids Res. 1987 Dec 23;15(24):10373–10391. doi: 10.1093/nar/15.24.10373. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Theissen H., Etzerodt M., Reuter R., Schneider C., Lottspeich F., Argos P., Lührmann R., Philipson L. Cloning of the human cDNA for the U1 RNA-associated 70K protein. EMBO J. 1986 Dec 1;5(12):3209–3217. doi: 10.1002/j.1460-2075.1986.tb04631.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Wieben E. D., Madore S. J., Pederson T. Protein binding sites are conserved in U1 small nuclear RNA from insects and mammals. Proc Natl Acad Sci U S A. 1983 Mar;80(5):1217–1220. doi: 10.1073/pnas.80.5.1217. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. Wieben E. D., Madore S. J., Pederson T. U1 small nuclear ribonucleoprotein studied by in vitro assembly. J Cell Biol. 1983 Jun;96(6):1751–1755. doi: 10.1083/jcb.96.6.1751. [DOI] [PMC free article] [PubMed] [Google Scholar]
  35. Wieben E. D., Pederson T. Small nuclear ribonucleoproteins of Drosophila: identification of U1 RNA-associated proteins and their behavior during heat shock. Mol Cell Biol. 1982 Aug;2(8):914–920. doi: 10.1128/mcb.2.8.914. [DOI] [PMC free article] [PubMed] [Google Scholar]
  36. Woppmann A., Rinke J., Lührmann R. Direct cross-linking of snRNP proteins F and 70K to snRNAs by ultra-violet radiation in situ. Nucleic Acids Res. 1988 Dec 9;16(23):10985–11004. doi: 10.1093/nar/16.23.10985. [DOI] [PMC free article] [PubMed] [Google Scholar]

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