Plant small nuclear RNAs. II. U6 RNA and a 4.5SI-like RNA are present in plant nuclei - PubMed (original) (raw)
Comparative Study
. 1987 Jan 26;15(2):543-60.
doi: 10.1093/nar/15.2.543.
- PMID: 2434924
- PMCID: PMC340451
- DOI: 10.1093/nar/15.2.543
Free PMC article
Comparative Study
Plant small nuclear RNAs. II. U6 RNA and a 4.5SI-like RNA are present in plant nuclei
T Kiss et al. Nucleic Acids Res. 1987.
Free PMC article
Abstract
Two small nuclear RNA species (U6 RNA and a 4.5SI-like RNA) not described so far for plants were detected in broad bean (Vicia faba L.) nuclei. U6 RNA is 98 nucleotides long, contains psi and methylated nucleotides and shows a surprisingly high degree of sequence homology (80%) with its rat counterpart, particularly in the middle part (a 57 nucleotide-long stretch) of the molecule, where it amounts to 98%. The 4.5SI-like RNA, similar in its structure to 4.5SI RNA detected so far only in rodent nuclei, is 94 nucleotides long, contains psi and an unidentified nucleotide and exhibits 52% overall sequence homology with rat 4.5SI RNA. A block of 20 consecutive nucleotides at the 5' end of the molecule is conserved between broad bean 4.5SI-like RNA and rat 4.5SI RNA. The presence of the two RNA polymerase III internal promoter consensus sequences in 4.5SI-like RNA suggests that it is an RNA polymerase III transcript.
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