GEO DataSets

Analysis of HCT-116 dicer- cells transfected with miR-124 duplex containing a segmented guide strand. Following miRNA guide strand segmentation, seed-based (positions 2 through 8 at the 5' end of the guide strand) activity persisted. Results illustrate a structural flexibility in miRNA duplexes.

Organism:

Homo sapiens

Type:

Expression profiling by array, count, 3 protocol sets

Platform:

GPL10379

Series:

GSE25224

4 Samples

Download data: CEL

(Submitter supplied) microRNAs are ∼22 nucleotide regulatory RNAs that are processed into duplexes from hairpin structures and incorporated into Argonaute proteins. We find that a nick in the middle of the guide strand of an miRNA sequence allows for seed-based targeting characteristic of miRNA activity. Insertion of an inverted abasic, a dye, or a small gap between the two segments still permits target knockdown. While activity from the seed region of the segmented miRNA is apparent, activity from the 3' half of the guide strand is impaired, suggesting that an intact guide backbone is required for contribution from the 3' half. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Dataset:

GDS3774

Platform:

GPL10379

4 Samples

Download data: CEL

(Submitter supplied) Microarray expression profiles of wild-type, ago1-10, ago1-11, and dcl1-9 Arabidopsis thaliana ec. Landsberg erecta seedling at 9, 21, and 35 days after germination. Keywords: mutant response

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL71

37 Samples

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(Submitter supplied) DROSHA complementation experiments were performed to check whether dsRBD of DROSHA recognizes the lower stem of pri-miRNAs and affects miRNA biogenesis.

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL16791

17 Samples

Download data: TXT

(Submitter supplied) To investigate the precise processing mechanism of pri-miRNA, we prepared 38,880 pri-miRNA variants which contain unique barcode sequences (Fang and Bartel, Mol Cell, 60: 131) and performed high-throughput processing experiments.

Organism:

synthetic construct

Type:

Other

Platform:

GPL19604

3 Samples

Download data: TXT

(Submitter supplied) MicroRNAs (miRNAs) are small regulatory RNAs that are essential in all studied metazoans. Research has focused on the prediction and identification of novel miRNAs, while little has been done to validate, annotate, and characterize identified miRNAs. Using Illumina sequencing, ~20 million small RNA sequences were obtained from Caenorhabditis elegans. Of the 175 miRNAs listed on the miRBase database, 106 were validated as deriving from a stem–loop precursor with hallmark characteristics of miRNAs. more...

Organism:

Caenorhabditis elegans

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL9269

1 Sample

Download data: PDF, TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing; Other

Platform:

GPL16791

13 Samples

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(Submitter supplied) MicroRNA (miRNA) maturation is initiated by DROSHA, a double-stranded RNA (dsRNA)-specific RNase III enzyme. By cleaving primary miRNAs (pri-miRNAs) at specific positions, DROSHA serves as a main determinant of miRNA sequences and a highly selective gate-keeper for the canonical miRNA pathway. However, the sites of DROSHA-mediated processing have not been annotated on a genomic scale, and it remains unclear to what extent DROSHA functions outside the miRNA pathway. more...

Organism:

Homo sapiens

Type:

Other

Platform:

GPL16791

4 Samples

Download data: TSV

(Submitter supplied) MicroRNA (miRNA) maturation is initiated by DROSHA, a double-stranded RNA (dsRNA)-specific RNase III enzyme. By cleaving primary miRNAs (pri-miRNAs) at specific positions, DROSHA serves as a main determinant of miRNA sequences and a highly selective gate-keeper for the canonical miRNA pathway. However, the sites of DROSHA-mediated processing have not been annotated on a genomic scale, and it remains unclear to what extent DROSHA functions outside the miRNA pathway. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

9 Samples

Download data: TSV

(Submitter supplied) The microRNA (miRNA) biogenesis is responsible for the production of miRNAs that play critical roles in gene expression and numerous human diseases. The adequate biogenesis of miRNAs is largely determined by the efficiency and fidelity of primary microRNA (pri-miRNA) processing by Microprocessor. Here, we investigated the roles of a secondary RNA element, an RNA bulge, in pri-miRNA processing. We discovered that the 3p-strand bulges in positions 7-9 from the Microprocessor cleavage sites (midB_7-9) contributes to determining the cleavage sites of Microprocessor, the 5p- and 3p-strand bugles in positions 10-12 (midB_10-12) blocked the unproductive cleavage, and the 3p-strand bulges in positions 6-7 (seedB) inhibited the productive cleavage of Microprocessor. more...

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL18573

15 Samples

Download data: FASTA, TXT

(Submitter supplied) In flies, small silencing RNAs are sorted between Argonaute1 (Ago1), the central protein component of the microRNA (miRNA) pathway, and Argonaute2 (Ago2), which mediates RNA interference. Extensive double-stranded character—as is found in small interfering RNAs (siRNAs)—directs duplexes into Ago2, whereas central mismatches, like those found in miRNA/miRNA* duplexes, direct duplexes into Ago1. Central to this sorting decision is the affinity of the small RNA duplex for the Dcr-2/R2D2 heterodimer, which loads small RNAs into Ago2. more...

Organism:

Drosophila melanogaster

Type:

Non-coding RNA profiling by high throughput sequencing; Other

Platform:

GPL9058

11 Samples

Download data: TAR, TXT

(Submitter supplied) In flies, microRNAs (miRNAs) are synthesized as a short imperfect duplex, where the miRNA is paired to another small RNA, dubbed the "miRNA*". Usually, miRNA*s are degraded in the last steps of miRNA maturation, but we found evidence that some of them can be loaded on the Ago2 protein.

Organism:

Drosophila melanogaster

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL9058

7 Samples

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(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Mus musculus

Type:

Expression profiling by array; Expression profiling by high throughput sequencing

Platforms:

GPL8321 GPL11002

30 Samples

Download data: CEL

(Submitter supplied) microRNAs (miRNAs) are essential components of gene regulation, but identification of miRNA targets remains a major challenge. Most target prediction and discovery relies on perfect complementarity of the miRNA seed to the 3’ untranslated region (UTR). However, it is unclear to what extent miRNAs target sites without seed matches. Here, we performed a transcriptome-wide identification of the endogenous targets of a single miRNA—miR-155—in a genetically controlled manner. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL11002

24 Samples

Download data: PDF, TXT

(Submitter supplied) microRNAs (miRNAs) are essential components of gene regulation, but identification of miRNA targets remains a major challenge. Most target prediction and discovery relies on perfect complementarity of the miRNA seed to the 3’ untranslated region (UTR). However, it is unclear to what extent miRNAs target sites without seed matches. Here, we performed a transcriptome-wide identification of the endogenous targets of a single miRNA—miR-155—in a genetically controlled manner. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL8321

6 Samples

Download data: CEL

(Submitter supplied) Recurrent somatic hotspot mutations of DICER1 appear to be clustered around each of four critical metal binding residues in the RNase IIIB domain of DICER1. This domain is responsible for cleavage of the 3’ end of the 5p-miRNA strand of a pre-mRNA hairpin. To investigate the effects of these cancer-associated “hotspot” mutations we engineered mouse Dicer1-deficient ES cells to express wild-type and an allelic series of the mutant human DICER1 variants. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL6246

28 Samples

Download data: CEL

(Submitter supplied) Effect of MCPIP1 knockdown on miRNA expression profile.

Organism:

Murid gammaherpesvirus 4; Mus musculus; Rattus norvegicus; Murid betaherpesvirus 1; JC polyomavirus; Human immunodeficiency virus 1; Human gammaherpesvirus 8; Homo sapiens; Human alphaherpesvirus 1; Human betaherpesvirus 5; Betapolyomavirus hominis; human gammaherpesvirus 4; Betapolyomavirus macacae

Type:

Non-coding RNA profiling by array

Platform:

GPL7723

2 Samples

Download data: TXT

(Submitter supplied) Canonical microRNAs (miRNAs) require two processing steps: the first by the Microprocessor, a complex of DGCR8 and Drosha, and the second by Dicer. dgcr8delta/delta mouse embryonic stem cells (mESCs) have less severe phenotypes than dicer1delta/delta mESCs, suggesting a physiological role for Microprocessor-independent, Dicer-dependent small RNAs. To identify these small RNAs with unusual biogenesis, we performed high-throughput sequencing from wild type, dgcr8delta/delta, and dicer1delta/delta mESCs. more...

Organism:

Mus musculus

Type:

Non-coding RNA profiling by high throughput sequencing

Platforms:

GPL7196 GPL7195

5 Samples

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(Submitter supplied) Since the early 1980s remarkable progress has been made in understanding the role of the HER2 locus in carcinogenesis, but many details of its regulatory network are still elusive. We recently reported the finding of 367 new human microRNA (miRNA) genes of which one, mir-4728, is encoded in an intron of the HER2 gene. Here, we confirm that the HER2 oncogene is a bi-functional locus encoding the membrane receptor and a functional miRNA gene. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platforms:

GPL6884 GPL10558

20 Samples

Download data: TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Expression profiling by array; Non-coding RNA profiling by array

Platforms:

GPL9081 GPL10558

20 Samples

Download data: TXT