In:
Genome Research, Cold Spring Harbor Laboratory, Vol. 16, No. 1 ( 2006-01), p. 20-29
Abstract:
Recent evidence points to considerable transcription occurring in non-protein-coding regions of eukaryote genomes. However, their lack of conservation and demonstrated function have created controversy over whether these transcripts are functional. Applying a novel cloning strategy, we have cloned 100 novel and 61 known or predicted Caenorhabditis elegans full-length ncRNAs. Studying the genomic environment and transcriptional characteristics have shown that two-thirds of all ncRNAs, including many intronic snoRNAs, are independently transcribed under the control of ncRNA-specific upstream promoter elements. Furthermore, the transcription levels of at least 60% of the ncRNAs vary with developmental stages. We identified two new classes of ncRNAs, stem-bulge RNAs (sbRNAs) and snRNA-like RNAs (snlRNAs), both featuring distinct internal motifs, secondary structures, upstream elements, and high and developmentally variable expression. Most of the novel ncRNAs are conserved in Caenorhabditis briggsae , but only one homolog was found outside the nematodes. Preliminary estimates indicate that the C. elegans transcriptome contains ∼2700 small non-coding RNAs, potentially acting as regulatory elements in nematode development.
Type of Medium:
Online Resource
ISSN:
1088-9051
Language:
English
Publisher:
Cold Spring Harbor Laboratory
Publication Date:
2006
detail.hit.zdb_id:
1483456-X
SSG:
12
Permalink