Jan 26, 1987

Plant small nuclear RNAs. II. U6 RNA and a 4.5SI-like RNA are present in plant nuclei

Nucleic Acids Research
T KissF Solymosy

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.

Mentioned in this Paper

RNA Polymerase III
Small Nuclear RNA
RNA Conformation
Small Nuclear RNA Location
Methylate
Promoter
Tachigalia
Cell Nucleus
U6 small nuclear RNA
Homologous Sequences, Nucleic Acid

About this Paper

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