U7 small nuclear RNA explained

U7 small nuclear RNA
Symbol:U7
Rfam:RF00066
Rna Type:Gene
snRNA
Tax Domain:Eukaryota

The U7 small nuclear RNA (U7 snRNA) is an RNA molecule and a component of the small nuclear ribonucleoprotein complex (U7 snRNP). The U7 snRNA is required for histone pre-mRNA processing.

The 5' end of the U7 snRNA binds the HDE (histone downstream element), a conserved purine-rich region, located 15 nucleotides downstream the histone mRNA cleavage site.[1] [2] The binding of the HDE region by the U7 snRNA, through complementary base-pairing, is an important step for the future recruitment of cleavage factors during histone pre-mRNA processing.[3]

See also

Further reading

[4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [70] [71] [72] [73] [74] [75] [76] [77] [78] [79] [80] [81] [82] [83] [84]

External links

Notes and References

  1. Spycher C, Streit A, Stefanovic B, Albrecht D, Koning TH, Schümperli D . 3' end processing of mouse histone pre-mRNA: evidence for additional base-pairing between U7 snRNA and pre-mRNA . Nucleic Acids Res . 22 . 4023–4030 . 1994 . 7937126. 10.1093/nar/22.20.4023 . 20 . 331885.
  2. Mowry KL, Steitz JA . Identification of the human U7 snRNP as one of several factors involved in the 3' end maturation of histone premessenger RNA's . Science . 238 . 4834 . 1682–1687 . 1987 . 2825355. 10.1126/science.2825355. 1987Sci...238.1682M .
  3. Marzluff. William F.. Wagner. Eric J.. Duronio. Robert J.. Metabolism and regulation of canonical histone mRNAs: life without a poly(A) tail. Nature Reviews Genetics. 9. 11. 843–854. 10.1038/nrg2438. 2715827. 18927579. 2008.
  4. Voigt T, Meyer K, Baum O, Schümperli D . Ultrastructural changes in diaphragm neuromuscular junctions in a severe mouse model for Spinal Muscular Atrophy and their prevention by bifunctional U7 snRNA correcting SMN2 splicing . Neuromuscul Disord . 20 . 11 . 744–752 . 2010 . 20832308 . 10.1016/j.nmd.2010.06.010. 11835561 .
  5. Ruepp MD, Vivarelli S, Pillai RS, Kleinschmidt N, Azzouz TN, Barabino SM, Schümperli D . The 68 kDa subunit of mammalian cleavage factor I interacts with the U7 small nuclear ribonucleoprotein and participates in 3'-end processing of animal histone mRNAs . Nucleic Acids Res . 38. 21. 7637–7650. 2010 . 20634199 . 2995043 . 10.1093/nar/gkq613.
  6. Geib T, Hertel KJ . Restoration of full-length SMN promoted by adenoviral vectors expressing RNA antisense oligonucleotides embedded in U7 snRNAs . PLOS ONE . 4 . 12 . e8204 . 2009 . 19997596 . 2781471 . 10.1371/journal.pone.0008204 . 2009PLoSO...4.8204G . Valcarcel . Juan. free .
  7. Godfrey AC, White AE, Tatomer DC, Marzluff WF, Duronio RJ . The Drosophila U7 snRNP proteins Lsm10 and Lsm11 are required for histone pre-mRNA processing and play an essential role in development . RNA . 15 . 9 . 1661–1672 . 2009 . 19620235 . 2743060 . 10.1261/rna.1518009.
  8. Yang XC, Torres MP, Marzluff WF, Dominski Z . Three proteins of the U7-specific Sm ring function as the molecular ruler to determine the site of 3'-end processing in mammalian histone pre-mRNA . Mol Cell Biol . 29 . 15 . 4045–4056 . 2009 . 19470752 . 2715809 . 10.1128/MCB.00296-09.
  9. Goyenvalle A, Babbs A, van Ommen GJ, Garcia L, Davies KE . Enhanced exon-skipping induced by U7 snRNA carrying a splicing silencer sequence: Promising tool for DMD therapy . Mol Ther . 17 . 7 . 1234–1240 . 2009 . 19455105 . 2835201 . 10.1038/mt.2009.113.
  10. Meyer K, Marquis J, Trüb J, Nlend Nlend R, Verp S, Ruepp MD, Imboden H, Barde I, Trono D, Schümperli D . Rescue of a severe mouse model for spinal muscular atrophy by U7 snRNA-mediated splicing modulation . Hum Mol Genet . 18 . 3 . 546–555 . 2009 . 19010792 . 10.1093/hmg/ddn382. free .
  11. Marquis J, Kämpfer SS, Angehrn L, Schümperli D . Doxycycline-controlled splicing modulation by regulated antisense U7 snRNA expression cassettes . Gene Ther . 16 . 1 . 70–77 . 2009 . 18701908 . 10.1038/gt.2008.138. free .
  12. Marz M, Mosig A, Stadler BM, Stadler PF . U7 snRNAs: a computational survey . Genomics Proteomics Bioinformatics . 5 . 3–4 . 187–195 . 2007 . 18267300 . 10.1016/S1672-0229(08)60006-6. 5054213 .
  13. Higuchi T, Anzai K, Kobayashi S . U7 snRNA acts as a transcriptional regulator interacting with an inverted CCAAT sequence-binding transcription factor NF-Y . Biochim Biophys Acta . 1780 . 2 . 274–281 . 2008 . 18078822 . 10.1016/j.bbagen.2007.11.005.
  14. Friend K, Lovejoy AF, Steitz JA . U2 snRNP binds intronless histone pre-mRNAs to facilitate U7-snRNP-dependent 3' end formation . Mol Cell . 28 . 2 . 240–252 . 2007 . 17964263 . 2149891 . 10.1016/j.molcel.2007.09.026.
  15. Uchikawa H, Fujii K, Kohno Y, Katsumata N, Nagao K, Yamada M, Miyashita T . U7 snRNA-mediated correction of aberrant splicing caused by activation of cryptic splice sites . J Hum Genet . 52 . 11 . 891–897 . 2007 . 17851636 . 10.1007/s10038-007-0192-8. free .
  16. Marquis J, Meyer K, Angehrn L, Kämpfer SS, Rothen-Rutishauser B, Schümperli D . Spinal muscular atrophy: SMN2 pre-mRNA splicing corrected by a U7 snRNA derivative carrying a splicing enhancer sequence . Mol Ther . 15 . 8 . 1479–1486 . 2007 . 17505471 . 10.1038/sj.mt.6300200. free .
  17. Asparuhova MB, Marti G, Liu S, Serhan F, Trono D, Schümperli D . Inhibition of HIV-1 multiplication by a modified U7 snRNA inducing Tat and Rev exon skipping . J Gene Med . 9 . 5 . 323–334 . 2007 . 17474072 . 10.1002/jgm.1027. 26072168 .
  18. Scheuerbrandt G . Exon skipping with U7 gene transfer . Acta Myol . 25 . 1 . 40–2 . 2006 . 17039980.
  19. Jaeger S, Martin F, Rudinger-Thirion J, Giegé R, Eriani G . Binding of human SLBP on the 3'-UTR of histone precursor H4-12 mRNA induces structural rearrangements that enable U7 snRNA anchoring . Nucleic Acids Res . 34 . 17 . 4987–4995 . 2006 . 16982637 . 1635294 . 10.1093/nar/gkl666.
  20. Wagner EJ, Marzluff WF . ZFP100, a component of the active U7 snRNP limiting for histone pre-mRNA processing, is required for entry into S phase . Mol Cell Biol . 26 . 17 . 6702–6712 . 2006 . 16914750 . 1592837 . 10.1128/MCB.00391-06.
  21. Kolev NG, Steitz JA . In vivo assembly of functional U7 snRNP requires RNA backbone flexibility within the Sm-binding site . Nat Struct Mol Biol . 13 . 4 . 347–353 . 2006 . 16547514 . 10.1038/nsmb1075. 868532 .
  22. Godfrey AC, Kupsco JM, Burch BD, Zimmerman RM, Dominski Z, Marzluff WF, Duronio RJ . U7 snRNA mutations in Drosophila block histone pre-mRNA processing and disrupt oogenesis . RNA . 12 . 3 . 396–409 . 2006 . 16495235 . 1383579 . 10.1261/rna.2270406.
  23. Madocsai C, Lim SR, Geib T, Lam BJ, Hertel KJ . Correction of SMN2 Pre-mRNA splicing by antisense U7 small nuclear RNAs . Mol Ther . 12 . 6 . 1013–1022 . 2005 . 16226920 . 10.1016/j.ymthe.2005.08.022. free .
  24. Azzouz TN, Pillai RS, Däpp C, Chari A, Meister G, Kambach C, Fischer U, Schümperli D . Toward an assembly line for U7 snRNPs: interactions of U7-specific Lsm proteins with PRMT5 and SMN complexes . J Biol Chem . 280 . 41 . 34435–34440 . 2005 . 16087681 . 10.1074/jbc.M505077200. free . 21.11116/0000-0007-E5F1-6 . free .
  25. Azzouz TN, Gruber A, Schümperli D . U7 snRNP-specific Lsm11 protein: dual binding contacts with the 100 kDa zinc finger processing factor (ZFP100) and a ZFP100-independent function in histone RNA 3' end processing . Nucleic Acids Res . 33 . 7 . 2106–2117 . 2005 . 15824063 . 1075925 . 10.1093/nar/gki516.
  26. Goyenvalle A, Vulin A, Fougerousse F, Leturcq F, Kaplan JC, Garcia L, Danos O . Rescue of dystrophic muscle through U7 snRNA-mediated exon skipping . Science . 306 . 5702 . 1796–1799 . 2004 . 15528407 . 10.1126/science.1104297. 2004Sci...306.1796G . 9359783 . free .
  27. Schümperli D, Pillai RS . The special Sm core structure of the U7 snRNP: far-reaching significance of a small nuclear ribonucleoprotein . Cell Mol Life Sci . 61 . 19–20 . 2560–2570 . 2004 . 15526162 . 10.1007/s00018-004-4190-0. 5780814 .
  28. Liu S, Asparuhova M, Brondani V, Ziekau I, Klimkait T, Schümperli D . Inhibition of HIV-1 multiplication by antisense U7 snRNAs and siRNAs targeting cyclophilin A . Nucleic Acids Res . 32 . 12 . 3752–3759 . 2004 . 15254276 . 484190 . 10.1093/nar/gkh715.
  29. 10.1261/rna.5143303 . Azzouz TN, Schumperli D . Evolutionary conservation of the U7 small nuclear ribonucleoprotein in Drosophila melanogaster . RNA . 9 . 12 . 1532–1541 . 2003 . 14624008 . 1370506.
  30. Pillai RS, Grimmler M, Meister G, Will CL, Lührmann R, Fischer U, Schümperli D . Unique Sm core structure of U7 snRNPs: assembly by a specialized SMN complex and the role of a new component, Lsm11, in histone RNA processing . Genes Dev . 17 . 18 . 2321–2333 . 2003 . 12975319 . 196468 . 10.1101/gad.274403.
  31. Dominski Z, Yang XC, Purdy M, Marzluff WF . Cloning and characterization of the Drosophila U7 small nuclear RNA . Proc Natl Acad Sci U S A . 100 . 16 . 9422–9427 . 2003 . 12872004 . 170934 . 10.1073/pnas.1533509100. 2003PNAS..100.9422D . free .
  32. 10.1007/s000180300047 . Brun C, Suter D, Pauli C, Dunant P, Lochmüller H, Burgunder JM, Schümperli D, Weis J . U7 snRNAs induce correction of mutated dystrophin pre-mRNA by exon skipping . Cell Mol Life Sci . 60 . 3 . 557–566 . 2003 . 12737315. 42878523 . 11138867 .
  33. Dominski Z, Erkmann JA, Yang X, Sànchez R, Marzluff WF . A novel zinc finger protein is associated with U7 snRNP and interacts with the stem-loop binding protein in the histone pre-mRNP to stimulate 3'-end processing . Genes Dev . 16 . 1 . 58–71 . 2002 . 11782445 . 155312 . 10.1101/gad.932302.
  34. Pillai RS, Will CL, Lührmann R, Schümperli D, Müller B . Purified U7 snRNPs lack the Sm proteins D1 and D2 but contain Lsm10, a new 14 kDa Sm D1-like protein . EMBO J . 20 . 19 . 5470–5479 . 2001 . 11574479 . 125645 . 10.1093/emboj/20.19.5470.
  35. Müller B, Link J, Smythe C . Assembly of U7 small nuclear ribonucleoprotein particle and histone RNA 3' processing in Xenopus egg extracts . J Biol Chem . 275 . 32 . 24284–24293 . 2000 . 10827192 . 10.1074/jbc.M003253200. free .
  36. 10.1007/s004120050385 . Tuma RS, Roth MB . Induction of coiled body-like structures in Xenopus oocytes by U7 snRNA . Chromosoma . 108 . 6 . 337–344 . 1999 . 10591993. 26083793 .
  37. 10.1093/hmg/8.13.2415 . Suter D, Tomasini R, Reber U, Gorman L, Kole R, Schümperli D . Double-target antisense U7 snRNAs promote efficient skipping of an aberrant exon in three human beta-thalassemic mutations . Hum Mol Genet . 8 . 13 . 2415–2423 . 1999 . 10556289. free .
  38. Jacobs EY, Frey MR, Wu W, Ingledue TC, Gebuhr TC, Gao L, Marzluff WF, Matera AG . Coiled bodies preferentially associate with U4, U11, and U12 small nuclear RNA genes in interphase HeLa cells but not with U6 and U7 genes . Mol Biol Cell . 10 . 5 . 1653–63 . 1999 . 10233169 . 30488 . 10.1091/mbc.10.5.1653.
  39. Dominski Z, Zheng LX, Sanchez R, Marzluff WF . Stem-loop binding protein facilitates 3'-end formation by stabilizing U7 snRNP binding to histone pre-mRNA . Mol Cell Biol . 19 . 5 . 3561–70 . 1999 . 10207079 . 84148 . 10.1128/mcb.19.5.3561.
  40. Müller B, Schümperli D . The U7 snRNP and the hairpin binding protein: Key players in histone mRNA metabolism . Semin Cell Dev Biol . 8 . 6 . 567–576 . 1997 . 9642171 . 10.1006/scdb.1997.0182.
  41. 10.1073/pnas.95.9.4929 . Gorman L, Suter D, Emerick V, Schümperli D, Kole R . Stable alteration of pre-mRNA splicing patterns by modified U7 small nuclear RNAs . Proc Natl Acad Sci U S A . 95 . 9 . 4929–4934 . 1998 . 9560205 . 20190. 1998PNAS...95.4929G . free .
  42. 10.1073/pnas.93.25.14659 . Scharl EC, Steitz JA . Length suppression in histone messenger RNA 3'-end maturation: processing defects of insertion mutant premessenger RNAs can be compensated by insertions into the U7 small nuclear RNA . Proc Natl Acad Sci U S A . 93 . 25 . 14659–14664 . 1996 . 8962110 . 26191. 1996PNAS...9314659S . free .
  43. Wu CH, Murphy C, Gall JG . The Sm binding site targets U7 snRNA to coiled bodies (spheres) of amphibian oocytes . RNA . 2 . 8 . 811–23 . 1996 . 8752090 . 1369417.
  44. Turner PC, Whalen A, Schümperli D, Matera AG . The bona fide mouse U7 snRNA gene maps to a different chromosome than two U7 pseudogenes . Genomics . 31 . 2 . 250–252 . 1996 . 8824812 . 10.1006/geno.1996.0042.
  45. 10.1093/nar/23.16.3152 . Stefanovic B, Wittop Koning TH, Schümperli D . A synthetic histone pre-mRNA-U7 small nuclear RNA chimera undergoing cis cleavage in the cytoplasm of Xenopus oocytes . Nucleic Acids Res . 23 . 16 . 3152–3160 . 1995 . 7667091 . 307172.
  46. 10.1093/nar/23.16.3141 . Stefanovic B, Hackl W, Lührmann R, Schümperli D . Assembly, nuclear import and function of U7 snRNPs studied by microinjection of synthetic U7 RNA into Xenopus oocytes . Nucleic Acids Res . 23 . 16 . 3141–3151 . 1995 . 7667090 . 307171.
  47. 10.1073/pnas.92.13.5915 . Frey MR, Matera AG . Coiled bodies contain U7 small nuclear RNA and associate with specific DNA sequences in interphase human cells . Proc Natl Acad Sci U S A . 92 . 13 . 5915–5919 . 1995 . 7597053 . 41612. 1995PNAS...92.5915F . free .
  48. Scharl EC, Steitz JA . The site of 3' end formation of histone messenger RNA is a fixed distance from the downstream element recognized by the U7 snRNP . EMBO J . 13 . 10 . 2432–40 . 1994 . 8194533 . 395109. 10.1002/j.1460-2075.1994.tb06528.x .
  49. 10.1016/0020-711X(94)90156-2 . Pironcheva G, Russev G . Isolation and purification of U7 snRNP particles . Int J Biochem . 26 . 2 . 269–272 . 1994 . 8174762.
  50. Pironcheva G, Russev G . Isolation and purification of U7 and snRNP particles . Microbios . 79 . 321 . 223–9 . 1994 . 7837994.
  51. Bond U, Yario TA . The steady state levels and structure of the U7 snRNP are constant during the human cell cycle: lack of cell cycle regulation of histone mRNA 3' end formation . Cell Mol Biol Res . 40 . 1 . 27–34 . 1994 . 7804324.
  52. Pironcheva G, Russev G . Characterization of the protein moiety of U7 small nuclear RNP particles . Microbios . 77 . 310 . 41–6 . 1994 . 7512683.
  53. 10.1073/pnas.90.13.6257 . Wu CH, Gall JG . U7 small nuclear RNA in C snurposomes of the Xenopus germinal vesicle . Proc Natl Acad Sci U S A . 90 . 13 . 6257–6259 . 1993 . 8327506 . 46907. 1993PNAS...90.6257W . free .
  54. Grimm C, Stefanovic B, Schümperli D . The low abundance of U7 snRNA is partly determined by its Sm binding site . EMBO J . 12 . 3 . 1229–38 . 1993 . 8458335 . 413326. 10.1002/j.1460-2075.1993.tb05764.x .
  55. 10.1016/0378-1119(92)90104-W . Watkins NJ, Phillips SC, Turner PC . The Xenopus U7 snRNA-encoding gene has an unusually compact structure . Gene . 120 . 2 . 271–276 . 1992 . 1398140.
  56. Watkins NJ, Phillips SC, Turner PC . The U7 small nuclear RNA genes of Xenopus borealis . Biochem Soc Trans . 20 . 3 . 301S . 1992 . 1426580 . 10.1042/bst020301s .
  57. 10.1016/0378-1119(92)90514-P . Phillips SC, Turner PC . A transcriptional analysis of the gene encoding mouse U7 small nuclear RNA . Gene . 116 . 2 . 181–186 . 1992 . 1634116.
  58. Phillips SC, Birnstiel ML . Analysis of a gene cluster coding for the Xenopus laevis U7 snRNA . Biochim Biophys Acta . 1131 . 1 . 95–8 . 1992 . 1374647 . 10.1016/0167-4781(92)90104-8.
  59. Kirby BJ, Turner PC . Primer extension analysis of mouse U7 small nuclear RNA gene expression . Biochem Soc Trans . 20 . 1 . 45S . 1992 . 1633969 . 10.1042/bst020045s .
  60. Melin L, Soldati D, Mital R, Streit A, Schümperli D . Biochemical demonstration of complex formation of histone pre-mRNA with U7 small nuclear ribonucleoprotein and hairpin binding factors . EMBO J . 11 . 2 . 691–7 . 1992 . 1531633 . 556501. 10.1002/j.1460-2075.1992.tb05101.x .
  61. Murray BA, Turner PC . Copy number of the U7 gene in some mammalian species . Biochem Soc Trans . 20 . 1 . 28S . 1992 . 1386043. 10.1042/bst020028s.
  62. 10.1073/pnas.88.21.9784 . Smith HO, Tabiti K, Schaffner G, Soldati D, Albrecht U, Birnstiel ML . Two-step affinity purification of U7 small nuclear ribonucleoprotein particles using complementary biotinylated 2'-O-methyl oligoribonucleotides . Proc Natl Acad Sci U S A . 88 . 21 . 9784–9788 . 1991 . 1835087 . 52805. 1991PNAS...88.9784S . free .
  63. 10.1101/gad.5.9.1709 . Bond UM, Yario TA, Steitz JA . Multiple processing-defective mutations in a mammalian histone pre-mRNA are suppressed by compensatory changes in U7 RNA both in vivo and in vitro . Genes Dev . 5 . 9 . 1709–1722 . 1991 . 1885007. free .
  64. Phillips SC, Turner PC . Deletions downstream of the 3' box of the mouse U7 small nuclear RNA gene dramatically affect transcription . Biochem Soc Trans . 19 . 3 . 342S . 1991 . 1783173. 10.1042/bst019342s.
  65. Turner PC, Phillips SC . Unusual compartmentalisation of mouse U7 small nuclear transcripts in Xenopus oocytes . Biochem Soc Trans . 19 . 3 . 341S . 1991 . 1783172 . 10.1042/bst019341s .
  66. Phillips SC, Turner PC . The mouse U7 small nuclear RNA gene promoter functions efficiently in Xenopus oocytes . Biochem Soc Trans . 19 . 3 . 339S . 1991 . 1783170 . 10.1042/bst019339s .
  67. 10.1093/nar/19.10.2629 . Cotten M, Oberhauser B, Brunar H, Holzner A, Issakides G, Noe CR, Schaffner G, Wagner E, Birnstiel ML . 2'-O-methyl, 2'-O-ethyl oligoribonucleotides and phosphorothioate oligodeoxyribonucleotides as inhibitors of the in vitro U7 snRNP-dependent mRNA processing event . Nucleic Acids Res . 19 . 10 . 2629–2635 . 1991 . 1710340 . 328180.
  68. 10.1093/nar/19.6.1344 . Phillips SC, Turner PC . Nucleotide sequence of the mouse U7 snRNA gene . Nucleic Acids Res . 19 . 6 . 1344 . 1991 . 2030952 . 333869.
  69. Gruber A, Soldati D, Burri M, Schümperli D . Isolation of an active gene and of two pseudogenes for mouse U7 small nuclear RNA . Biochim Biophys Acta . 1088 . 1 . 151–4 . 1991 . 1989694 . 10.1016/0167-4781(91)90167-K.
  70. 10.1016/0020-711X(91)90144-C . Pironcheva G, Russev G . U7 snRNP particles bind H4 pre-mRNA in vitro . Int J Biochem . 23 . 10 . 1049–1052 . 1991 . 1838527.
  71. Phillips SC, Turner PC . Sequence and expression of a mouse U7 snRNA type II pseudogene . DNA Seq . 1 . 6 . 401–4 . 1991 . 1768864 . 10.3109/10425179109020796.
  72. 10.1016/0378-1119(90)90378-5 . Soldati D, Schümperli D . Structures of four human pseudogenes for U7 small nuclear RNA . Gene . 95 . 2 . 305–306 . 1990 . 2249787.
  73. Hoffmann I, Birnstiel ML . Cell cycle-dependent regulation of histone precursor mRNA processing by modulation of U7 snRNA accessibility . Nature . 346 . 6285 . 665–668 . 1990 . 1696685 . 10.1038/346665a0. 1990Natur.346..665H . 4360220 .
  74. 10.1007/BF00360475 . Schümperli D, Albrecht U, Koning TW, Melin L, Soldati D, Stauber C, Lührmann R . Biochemical studies of U7 snRNPs and of histone RNA 3' processing . Mol Biol Rep . 14 . 2–3 . 205–206 . 1990 . 2141911. 1650768 .
  75. 10.1101/gad.3.12b.2172 . Kirsh AL, Groudine M, Challoner PB . Polyadenylation and U7 snRNP-mediated cleavage: alternative modes of RNA 3' processing in two avian histone H1 genes . Genes Dev . 3 . 12B . 2172–2179 . 1989 . 2576416. free .
  76. Cotten M, Schaffner G, Birnstiel ML . Ribozyme, antisense RNA, and antisense DNA inhibition of U7 small nuclear ribonucleoprotein-mediated histone pre-mRNA processing in vitro . Mol Cell Biol . 9 . 10 . 4479–87 . 1989 . 2479828 . 362532. 10.1128/mcb.9.10.4479 .
  77. 10.1073/pnas.86.12.4345 . Vasserot AP, Schaufele FJ, Birnstiel ML . Conserved terminal hairpin sequences of histone mRNA precursors are not involved in duplex formation with the U7 RNA but act as a target site for a distinct processing factor . Proc Natl Acad Sci U S A . 86 . 12 . 4345–4349 . 1989 . 2734288 . 287265. 1989PNAS...86.4345V . free .
  78. Southgate C, Busslinger M . In vivo and in vitro expression of U7 snRNA genes: cis- and trans-acting elements required for RNA polymerase II-directed transcription . EMBO J . 8 . 2 . 539–49 . 1989 . 2721491 . 400839. 10.1002/j.1460-2075.1989.tb03408.x .
  79. Soldati D, Schümperli D . Structural and functional characterization of mouse U7 small nuclear RNA active in 3' processing of histone pre-mRNA . Mol Cell Biol . 8 . 4 . 1518–24 . 1988 . 3380087 . 363311. 10.1128/mcb.8.4.1518 .
  80. Cotten M, Gick O, Vasserot A, Schaffner G, Birnstiel ML . Specific contacts between mammalian U7 snRNA and histone precursor RNA are indispensable for the in vitro 3' RNA processing reaction . EMBO J . 7 . 3 . 801–8 . 1988 . 3396543 . 454395. 10.1002/j.1460-2075.1988.tb02878.x .
  81. Gilmartin GM, Schaufele F, Schaffner G, Birnstiel ML . Functional analysis of the sea urchin U7 small nuclear RNA . Mol Cell Biol . 8 . 3 . 1076–84 . 1988 . 2835659 . 363250. 10.1128/mcb.8.3.1076 .
  82. Strub K, Birnstiel ML . Genetic complementation in the Xenopus oocyte: co-expression of sea urchin histone and U7 RNAs restores 3' processing of H3 pre-mRNA in the oocyte . EMBO J . 5 . 7 . 1675–82 . 1986 . 2943587 . 1166994. 10.1002/j.1460-2075.1986.tb04411.x .
  83. 10.1073/pnas.83.10.3243 . De Lorenzi M, Rohrer U, Birnstiel ML . Analysis of a sea urchin gene cluster coding for the small nuclear U7 RNA, a rare RNA species implicated in the 3' editing of histone precursor mRNAs . Proc Natl Acad Sci U S A . 83 . 10 . 3243–3247 . 1986 . 3458178 . 323489. 1986PNAS...83.3243D . free .
  84. Strub K, Galli G, Busslinger M, Birnstiel ML . The cDNA sequences of the sea urchin U7 small nuclear RNA suggest specific contacts between histone mRNA precursor and U7 RNA during RNA processing . EMBO J . 3 . 12 . 2801–7 . 1984 . 6084590 . 557769. 10.1002/j.1460-2075.1984.tb02212.x .