title: Global effects of the small RNA biogenesis machinery on the Arabidopsis thaliana transcriptome.
abstract: In Arabidopsis thaliana, four different dicer-like (DCL) proteins have distinct but partially overlapping functions in the biogenesis of microRNAs (miRNAs) and siRNAs from longer, noncoding precursor RNAs. To analyze the impact of different components of the small RNA biogenesis machinery on the transcriptome, we subjected dcl and other mutants impaired in small RNA biogenesis to whole-genome tiling array analysis. We compared both protein-coding genes and noncoding transcripts, including most pri-miRNAs, in two tissues and several stress conditions. Our analysis revealed a surprising number of common targets in dcl1 and dcl2 dcl3 dcl4 triple mutants. Furthermore, our results suggest that the DCL1 is not only involved in miRNA action but also contributes to silencing of a subset of transposons, apparently through an effect on DNA methylation.
authors.affiliation: Department of Molecular Biology, Max Planck Institute for Developmental Biology, 72076 Tübingen, Germany.
authors.forename: Sascha
authors.initials: S
authors.lastname: Laubinger
authors.forename: Georg
authors.initials: G
authors.lastname: Zeller
authors.forename: Stefan R
authors.initials: SR
authors.lastname: Henz
authors.forename: Sabine
authors.initials: S
authors.lastname: Buechel
authors.forename: Timo
authors.initials: T
authors.lastname: Sachsenberg
authors.forename: Jia-Wei
authors.initials: JW
authors.lastname: Wang
authors.forename: Gunnar
authors.initials: G
authors.lastname: Rätsch
authors.forename: Detlef
authors.initials: D
authors.lastname: Weigel
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D018797:Cell Cycle Proteins / Q000235:genetics / Q000378:metabolism*; D019175:DNA Methylation; D004251:DNA Transposable Elements / Q000235:genetics; D020869:Gene Expression Profiling / Q000379:methods; D018506:Gene Expression Regulation, Plant / Q000235:genetics / Q000502:physiology*; D035683:MicroRNAs / Q000096:biosynthesis*; D009154:Mutation / Q000235:genetics; D040081:Protein Array Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D043244:Ribonuclease III / Q000235:genetics / Q000378:metabolism*
chemical_list: D029681:Arabidopsis Proteins; D018797:Cell Cycle Proteins; D004251:DNA Transposable Elements; D035683:MicroRNAs; C504982:DCL4 protein, Arabidopsis; C402383:DCL1 protein, Arabidopsis; C511919:DCL2 protein, Arabidopsis; C519654:DCL3 protein, Arabidopsis; D043244:Ribonuclease III