Arabidopsis thaliana
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA143397 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:RNA-dependent RNA polymerase 2 (RDR2) is a crucial regulator of RNA-directed DNA methylation (RdDM). Recentily RDR2 was reported to regulate expression of long intergenic noncoding RNAs. Here we used ATH lincRNA v1 expression arrays to compare lincRNA expression in inflorescence tissues of rdr2-1 and WT. Among the 4,634 lincRNAs detected we found that more than 34% of them were differentially expressed, including 676 lincRNAs that were up-regulated and 890 down-regulated in rdr2-1.
2011-08-06 | GSE30395 | GEO
Project description:RNA-dependent RNA polymerase 2 (RDR2) is a crucial regulator of RNA-directed DNA methylation (RdDM). Recentily RDR2 was reported to regulate expression of long intergenic noncoding RNAs. Here we used ATH lincRNA v1 expression arrays to compare lincRNA expression in inflorescence tissues of rdr2-1 and WT. Among the 4,634 lincRNAs detected we found that more than 34% of them were differentially expressed, including 676 lincRNAs that were up-regulated and 890 down-regulated in rdr2-1. Inflorescences(Col-0) x Inflorescences(rdr2-1), 3 biological replicates.
2011-08-05 | E-GEOD-30395 | biostudies-arrayexpress
Project description:The Arabidopsis genome contains a highly complex and abundant population of small RNAs, and many of the endogenous siRNAs are dependent on RNA-DEPENDENT RNA POLYMERASE 2 (RDR2) for their biogenesis. By analyzing an rdr2 loss-of-function mutant using two different parallel sequencing technologies, MPSS and 454, we characterized the complement of miRNAs expressed in Arabidopsis inflorescence to considerable depth. Nearly all known miRNAs were enriched in this mutant and we identified 13 new miRNAs, all of which were relatively low abundance and constitute new families. Trans-acting siRNAs (ta-siRNAs) were even more highly enriched. Computational and gel blot analyses suggested that the minimal number of miRNAs in Arabidopsis is approximately 155. The size profile of small RNAs in rdr2 reflected enrichment of 21-nt miRNAs and other classes of siRNAs like ta-siRNAs, and a significant reduction in 24-nt heterochromatic siRNAs. Other classes of small RNAs were found to be RDR2-independent, particularly those derived from long inverted repeats and a subset of tandem repeats. The small RNA populations in other Arabidopsis small RNA biogenesis mutants were also examined; a dcl2/3/4 triple mutant showed a similar pattern to rdr2, whereas dcl1-7 and rdr6 showed reductions in miRNAs and ta-siRNAs consistent with their activities in the biogenesis of these types of small RNAs. Deep sequencing of mutants provides a genetic approach for the dissection and characterization of diverse small RNA populations and the identification of low abundance miRNAs. Keywords: small RNA sequences generated by 454 sequencing
2006-09-08 | GSE5343 | GEO
Project description:Long Intergenic Noncoding RNAs regulated by SERRATE, CBP20 and CBP80
| PRJNA152059 | ENA
Project description:1. Evaluate the diagnostic value of long noncoding RNA (CCAT1) expression by RT-PCR in peripheral blood in colorectal cancer patients versus normal healthy control personal.
2. Evaluate the clinical utility of detecting long noncoding RNA (CCAT1) expression in diagnosis of colorectal cancer patients & its relation to tumor staging.
3. Evaluate the clinical utility of detecting long noncoding RNA (CCAT1) expression in precancerous colorectal diseases.
4. Compare long noncoding RNA (CCAT1) expression with traditional marker; carcinoembryonic antigen (CEA) and Carbohydrate antigen 19-9 (CA19-9) in diagnosis of colorectal cancer.
| 2330122 | ecrin-mdr-crc
Project description:Most endogenous siRNAs in Arabidopsis are dependent on RNA-DEPENDENT RNA POLYMERASE 2 (RDR2) for their biogenesis. Recent work has demonstrated that the maize MEDIATOR OF PARAMUTATION1 (mop1) gene is a predicted ortholog of the Arabidopsis RDR2 gene. The mop1 gene is required for establishment of paramutation and maintenance of transcriptional silencing of transposons and transgenes, suggesting the potential involvement of small RNAs. We analyzed small RNAs in wildtype maize and in the isogenic mop1-1 loss-of-function mutant using Illumina’s sequencing-by-synthesis (SBS) technology, which allowed us to characterize the complement of maize small RNAs to considerable depth. Similar to rdr2 in Arabidopsis, in mop1-1, the 24 nt (nucleotide) endogenous heterochromatic short-interfering siRNAs were dramatically reduced resulting in an enrichment of miRNAs and trans-acting siRNAs (ta-siRNAs). In contrast to the Arabidopsis rdr2 mutant, the mop1-1 plants retained a highly abundant heterochromatic ~22 nt class of small RNAs. These data suggest that maize, unlike Arabidopsis, has a second mechanism for heterochromatic siRNA production. The enrichment of miRNAs and loss of 24 nt heterochromatic siRNAs in mop1-1 should be advantageous for miRNA discovery as the maize genome becomes more fully sequenced.
2008-10-01 | GSE12173 | GEO
Project description:JMJ24 is a RING motif containing Jumonji protein, whose E3 ligase activity is essential for communication between histone methylation and DNA methylation.In Arabidopsis JMJ24 is higly expressed in mature pollen. JMJ24 interacted with RDR2 and a single C4HC3 RING motif enabled JMJ24 to mono-ubiquitinate RDR2 for stabilization. RDR2 acted downsteam of JMJ24 for DNA methylation and local silencing. Here we performed tiling-array-based transcriptome profiling using mature pollen collected from WT and jmj24-1 and found that hundreds of loci encoding transposon elements, noncoding RNAs and protein-coding genes are regulated by JMJ24.
2011-12-01 | GSE29708 | GEO
Project description:Most endogenous siRNAs in Arabidopsis are dependent on RNA-DEPENDENT RNA POLYMERASE 2 (RDR2) for their biogenesis. Recent work has demonstrated that the maize MEDIATOR OF PARAMUTATION1 (mop1) gene is a predicted ortholog of the Arabidopsis RDR2 gene. The mop1 gene is required for establishment of paramutation and maintenance of transcriptional silencing of transposons and transgenes, suggesting the potential involvement of small RNAs. We analyzed small RNAs in wildtype maize and in the isogenic mop1-1 loss-of-function mutant using Illumina’s sequencing-by-synthesis (SBS) technology, which allowed us to characterize the complement of maize small RNAs to considerable depth. Similar to rdr2 in Arabidopsis, in mop1-1, the 24 nt (nucleotide) endogenous heterochromatic short-interfering siRNAs were dramatically reduced resulting in an enrichment of miRNAs and trans-acting siRNAs (ta-siRNAs). In contrast to the Arabidopsis rdr2 mutant, the mop1-1 plants retained a highly abundant heterochromatic ~22 nt class of small RNAs. These data suggest that maize, unlike Arabidopsis, has a second mechanism for heterochromatic siRNA production. The enrichment of miRNAs and loss of 24 nt heterochromatic siRNAs in mop1-1 should be advantageous for miRNA discovery as the maize genome becomes more fully sequenced. This library was derived from maize variety K55 wild-type and mop1 mutant. Immature ears were harvested from plants grown outdoors in Tuscon, AZ. The material was harvested from plants 68 days after germination, with the floral tissue including young tassels 2-3 cm long. Total RNA was isolated using a standard TRIZOL-based method and the small RNA libraries were generated as described by Lu et al. (Methods 2007, 43:110), followed by sequencing with Illumina's SBS method. The adapter sequences were removed, and the abundance of each distinct small RNA was determined. Raw data are unavailable from Illumina
2008-09-30 | E-GEOD-12173 | biostudies-arrayexpress
Project description:JMJ24 is a RING motif containing Jumonji protein, whose E3 ligase activity is essential for communication between histone methylation and DNA methylation.In Arabidopsis JMJ24 is higly expressed in mature pollen. JMJ24 interacted with RDR2 and a single C4HC3 RING motif enabled JMJ24 to mono-ubiquitinate RDR2 for stabilization. RDR2 acted downsteam of JMJ24 for DNA methylation and local silencing. Here we performed tiling-array-based transcriptome profiling using mature pollen collected from WT and jmj24-1 and found that hundreds of loci encoding transposon elements, noncoding RNAs and protein-coding genes are regulated by JMJ24. WT vs. jmj24-1
2011-12-01 | E-GEOD-29708 | biostudies-arrayexpress
Project description:Long intergenic noncoding RNAs (lincRNAs) transcribed from intergenic regions play important roles in key biological processes.Analysis of published transcriptom datasets suggested some lincRNAs may be regulated by SERRATE,CBP20 and CBP80 in Arabidopsis. To further investigate the regulation, we use Arabidopsis lincRNA arrays v1 to detect lincRNA expression in se-2 and cbp20/80 double mutants.We found the expression levels of 940 lincRNAs (20%) out of the 4,634 lincRNAs with probes in array were significantly alerted in all mutants (P-value of eBays ANOVA < 0.05 & fold change of signal intensity > 2). This group included 525 up-regulated and 415 down-regulated lincRNAs.
2012-09-29 | GSE35963 | GEO