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Differential expression of U5snRNA gene variants in maize (Zea mays) protoplasts

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Abstract

The small nuclear ribonucleoprotein particles U1, U2, U4/U6 and U5 participate in the removal of introns from pre-messenger RNAs in the nucleus. Three genes encoding U5snRNAs, the RNA moiety of U5snRNPs, have been isolated from maize. As in other plant UsnRNA gene families the three maize U5snRNA genes exhibit sequence variation. Two of the gene variants (MzU5.1 and MzU5.2) are clearly expressed after transfection into maize leaf protoplasts while the third gene variant (MzU5.3) is expressed at very low levels. These different levels of expression cannot be directly correlated with sequence changes in the highly conserved Upstream Sequence Element (USE) required for expression of Arabidopsis UsnRNA genes nor with differential stability of the U5snRNA transcripts. Further sequence elements may therefore have a role in regulating maize UsnRNA gene expression.

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Authors and Affiliations

  1. Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, Scotland

    David Leader, Robbie Waugh & John W. S. Brown

  2. Friedrich Miescher-Institute, P.O. Box 2543, CH-4002, Basel, Switzerland

    Sheila Connelly & Witold Filipowicz

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  1. David Leader
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  2. Sheila Connelly
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  3. Witold Filipowicz
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  4. Robbie Waugh
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  5. John W. S. Brown
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Leader, D., Connelly, S., Filipowicz, W. et al. Differential expression of U5snRNA gene variants in maize (Zea mays) protoplasts. Plant Mol Biol 21, 133–143 (1993). https://doi.org/10.1007/BF00039624

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  • DOI: https://doi.org/10.1007/BF00039624

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