title: The copy number of rice CACTA DNA transposons carrying MIR820 does not correlate with MIR820 expression.
abstract: MiR820 is a small RNA species (22 and 24 nucleotides), produced from transcripts originated from a region inside CACTA DNA transposons in rice. Because MIR820 is a transposon gene, its expression may depend on the transposon copy number. Here, we investigated the copy number of MIR820 and its expression levels in various cultivars and wild species of rice. We found no correlation between copy number and expression level, suggesting that MIR820 transcription is regulated not by the copy dosage but by the epigenetic state of each copy.
authors.affiliation: Graduate School of Bioagricultural Sciences; Nagoya University; Nagoya, Japan.
authors.forename: Misuzu
authors.initials: M
authors.lastname: Nosaka
authors.forename: Aiko
authors.initials: A
authors.lastname: Ishiwata
authors.forename: Sae
authors.initials: S
authors.lastname: Shimizu-Sato
authors.forename: Akemi
authors.initials: A
authors.lastname: Ono
authors.forename: Kiyoe
authors.initials: K
authors.lastname: Ishimoto
authors.forename: Yusaku
authors.initials: Y
authors.lastname: Noda
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Sato
mesh_terms: D001483:Base Sequence; D004251:DNA Transposable Elements / Q000235:genetics*; D015536:Down-Regulation / Q000235:genetics; D018628:Gene Dosage; D018506:Gene Expression Regulation, Plant; D035683:MicroRNAs / Q000235:genetics* / Q000378:metabolism; D008969:Molecular Sequence Data; D012275:Oryza / Q000235:genetics*
chemical_list: D004251:DNA Transposable Elements; D035683:MicroRNAs
keywords: DNA methyltransferase; Oryza sativa; OsDRM2; miR820; transposon