Analysis of the 5S RNA Pool in Arabidopsis thaliana: RNAs Are Heterogeneous and Only Two of the Genomic 5S Loci Produce Mature 5S RNA

Catherine Cloix (1) , Sylvie Tutois (2, 1) , Yasushi Yukawa (3) , Olivier Mathieu (1) , Claudine Cuvillier (1) , Marie-Claude Espagnol (2, 1) , Georges Picard (2, 1) , Sylvette Tourmente (2, 1)

1 Biomove - Génétique des eucaryotes, endocrinologie moléculaire
2 GReD - Génétique, Reproduction et Développement
3 Nagoya City University [Nagoya, Japan]

One major 5S RNA, 120 bases long, was revealed by an analysis of mature 5S RNA from tissues, developmental stages, and polysomes in Arabidopsis thaliana. Minor 5S RNA were also found, varying from the major one by one or two base substitutions; 5S rDNA units from each 5S array of the Arabidopsis genome were isolated by PCR using CIC yeast artificial chromosomes (YACs) mapped on the different loci. By using a comparison of the 5S DNA and RNA sequences, we could show that both major and minor 5S transcripts come from only two of the genomic 5S loci: chromosome 4 and chromosome 5 major block. Other 5S loci are either not transcribed or produce rapidly degraded 5S transcripts. Analysis of the 5-and 3-DNA flanking sequence has permitted the definition of specific signatures for each 5S rDNA array.

Domaines: Génétique des plantes

Catherine Cloix, Sylvie Tutois, Yasushi Yukawa, Olivier Mathieu, Claudine Cuvillier, et al.. Analysis of the 5S RNA Pool in Arabidopsis thaliana: RNAs Are Heterogeneous and Only Two of the Genomic 5S Loci Produce Mature 5S RNA. Genome Research, 2002, 12 (1), pp.132-144. ⟨10.1101/gr.181301⟩. ⟨hal-01920575⟩