| Abstract Detail
Recent advances in phylogeny and systematics of Brassicaceae Schranz, M. Eric [1], Mohammadin, Setareh [2]. Positionally-Conserved but Sequence-Diverged: Identification of Long non-coding RNAs in the Brassicaceae and Cleomaceae. Long non-coding RNAs (LncRNAs) have been identified as gene regulatory elements that influence the transcription of their neighbouring protein-coding genes. The discovery of LncRNAs in animals has stimulated genome-wide scans for these elements across plant genomes. Recently, 6480 LincRNAs were putatively identified in Arabidopsis thaliana (Brassicaceae), however there is limited information on their conservation. Using a phylogenomics approach, we assessed the positional and sequence conservation of these LncRNAs by analyzing the genomes of the basal Brassicaceae species Aethionema arabicum and Tarenaya hassleriana of the sister-family Cleomaceae. Furthermore, we generated transcriptomes for another three Aethionema species and one other Cleomaceae species to validate their transcriptional activity. We show that a subset of LncRNAs are highly diverged at the nucleotide level, but conserved by position (syntenic). Positionally conserved LncRNAs that are expressed neighbour important developmental and physiological genes. Interestingly, >70% of the positionally conserved LncRNAs are located in sub-telomeric regions of the Arabidopsis thaliana chromosomes. These results highlight the importance of analysing the position of non-coding genetic elements in plants, including LncRNAs, when studying their role in gene expression regulation. Log in to add this item to your schedule
1 - Wageningen University, Biosystematics Group, P.O. Box 16, Wageningen, 6700AP, The Netherlands 2 - Wageningen University, Biosystematics Group, P.O. Box 16, Wageningen, 6700AP, The Netherlands
Keywords: Brassicaceae long non-coding RNAs phylogenomics.
Presentation Type: Colloquium Presentations Session: C2 Location: Salon 8/The Shaw Conference Centre Date: Monday, July 27th, 2015 Time: 3:45 PM Number: C2006 Abstract ID:513 Candidate for Awards:None |