Discovery and profiling conserved and novel miRNAs involved in ovule development of Ginkgo biloba by deep sequencing
Ontology highlight
ABSTRACT:
ORGANISM(S): Ginkgo biloba
SUBMITTER: Biao Jin
PROVIDER: E-GEOD-74024 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:High-throughput small RNA sequencing were performed to identify a large number of miRNAs and their targets in mature female and male G. biloba leaves for the first time. We ascertained that the regulatory networks of the miRNAs are involved in many different primary biological processes based on potential target designations. Our study is the first to provide useful information for uncovering the regulatory networks of miRNAs in basal gymnosperm G. biloba leaves. small RNA sequencing in female and male leaves of G. biloba
2015-07-13 | E-GEOD-65229 | biostudies-arrayexpress
Project description:We sequenced mRNA from mature ovules and fully expanded leaves of female G. biloba to generate a comprehensive gene expression profile. These results provide valuable gene expression information, which will contribute to facilitate our understanding of various biological mechanisms between ovules and leaves and uncover a more important molecular insight toward ovule evolution in early seed plants. Examination of mRNA levels in ovules and leaves
2015-06-30 | E-GEOD-64502 | biostudies-arrayexpress
Project description:MicroRNAs (miRNAs) are involved in nearly every biological process examined to date. Mounting evidence show that some spermatozoa specific miRNAs play important roles in the regulation of spermatogenesis and germ cells development, but little is known of the exact identity and function of miRNA in sperm cells or their potential involvement in spermatogenesis and germ cells development. Here, we investigated the spermatozoa miRNA profiles using illumina deep sequencing combined with bioinformatic analysis using zebrafish as a model system. Deep sequencing of small RNAs yielded 12 million raw reads from zebrafish spermatozoa. Analysis showed that the noncoding RNA of the spermatozoa included tRNA, rRNA, snRNA, snoRNA and miRNA. By mapping to the zebrafish genome, we identified 400 novel and 204 conserved miRNAs which could be grouped into 104 families, including zebrafish specific families, such as mir-731, mir-724, mir-725, mir-729 and mir-2185. We report the first characterization of the miRNAs profiling in zebrafish spermatozoa. The obtained spermatozoa miRNAs profiling will serve as valuable resources to systematically study spermatogenesis in fish and vertebrate. Examination of small RNA populations in zebrafish spermatozoa
2015-04-01 | E-GEOD-61984 | biostudies-arrayexpress
Project description:Purpose: MicroRNAs (miRNAs) are ubiquitous components of endogenous plant transcriptome. miRNAs are small, single-stranded and ~21 nt long RNAs which regulate gene expression at the post-transcriptional level and are known to play essential roles in various aspects of plant development and growth. Previously, a number of miRNAs have been identified in potato through in silico analysis and deep sequencing approach. However, identification of miRNAs through deep sequencing approach was limited to a few tissue types and developmental stages. This study reports the identification and characterization of potato miRNAs in three different vegetative tissues and four stages of tuber development by high throughput sequencing. Results: Small RNA libraries were constructed from leaf, stem, root and four early developmental stages of tuberization and subjected to deep sequencing, followed by bioinformatics analysis. A total of 89 conserved miRNAs (belonging to 33 families), 147 potato-specific miRNAs (with star sequence) and 112 candidate potato-specific miRNAs (without star sequence) were identified. The digital expression profiling based on TPM (Transcripts Per Million) and qRT-PCR analysis of conserved and potato-specific miRNAs revealed that some of the miRNAs showed tissue specific expression (leaf, stem and root) while a few demonstrated tuberization stage-specific expressions. Targets were predicted for identified conserved and potato-specific miRNAs, and predicted targets of four conserved miRNAs, miR160, miR164, miR172 and miR171, which are ARF16 (Auxin Response Factor 16), NAM (NO APICAL MERISTEM), RAP1 (Relative to APETALA2 1) and HAIRY MERISTEM (HAM) respectively, were experimentally validated using 5M-bM-^@M-2RLM-RACE (RNA ligase mediated rapid amplification of cDNA ends). Gene ontology (GO) analysis for potato-specific miRNAs was also performed to predict their potential biological functions. Conclusions: We report a comprehensive study of potato miRNAs at genome-wide level by high-throughput sequencing and demonstrate that these miRNAs have tissue and/or developmental stage specific expression profile. Also, predicted targets of conserved miRNAs were experimentally confirmed for the first time in potato. Our findings indicate the existence of extensive and complex small RNA population in this crop and suggest their important role in pathways involved in diverse biological processes, including tuber developmental process. Total seven (Leaf, Root, Stem, Potato Tuber stage 0(PT0),Potato Tuber stage 1(PT1),Potato Tuber stage 2(PT2),Potato Tuber stage 3(PT3) ) small RNA libraries were consctructed and sequenced by deep sequencing using Illumina GAIIx.
2014-01-09 | E-GEOD-52599 | biostudies-arrayexpress
Project description:MicroRNAs (miRNAs) play a critical role in post-transcriptional gene regulation. miRNAs have been shown to control many genes involved in various biological and metabolic processes. Deep sequencing technologies have facilitated identification of species-specific or lowly expressed as well as conserved or highly expressed miRNAs in plants. In this research, we used Solexa sequencing to discover new microRNAs in trifoliate orange (Citrus trifoliata) an important rootstock of citrus. A total of 13,106,753 reads representing 4,876,395 distinct sequences were obtained from a short RNA library generated from small RNA extracted from C. trifoliata flower and fruit tissues, Based on sequence similarity and hairpin structure prediction, we found that 178,102 reads representing 89 sequences from 42 highly conserved miRNA families, have perfect matches to known miRNAs. We also identified 10 novel miRNA candidates, whose precursors were all potentially generated from citrus ESTs. And of them five miRNA* sequences were also sequenced. These sequences had not been described in other plant species and accumulation of these 10 novel miRNAs were confirmed by qRT-PCR analysis. Potential target genes were predicted for most conserved and novel miRNAs. Moreover, four target genes included one encoding IRX12 copper ion binding/ oxidoreductase and three genes encoding NB-LRR disease resistance protein have been experimentally verified by detection of the miRNA-mediated mRNA cleavage in C. trifoliata. Size fractionated small RNAs (16-30 bp) from total RNA extracts was ligated to 5' and 3' adapters, and reverse transcribed. After PCR amplification the sample was subjected to Solexa sequencing. The resultant 35nt sequence data were filtered according to base quality value. The remained sequences were used to trim 5' and 3' adaptors. The clean tags were used for further analysis.
2010-08-17 | E-GEOD-22089 | biostudies-arrayexpress
Project description:High-throughput small RNA sequencing were performed to identify a large number of miRNAs and their targets in mature G. biloba ovules. Our study is the first to provide useful information for uncovering the regulatory networks of miRNAs in basal gymnosperm G. biloba ovules.
2016-02-12 | GSE74024 | GEO
Project description:Most of small RNA library construction methods are based on RNA ligases, which prefer to join the molecules (small RNAs and adapters) that can anneal to each other and form a ligase favoured structure. Different platforms for next generation sequencing use different adapter sequences, causing the cloning bias. Adapters with degenerated nucleotides at the ligating ends (High Definition, HD adapters) were developed to reduce the cloning bias. However, above 90% of the cloning products is adapter dimer when the current available commercial kits and their corresponding protocols are used. Here we adopted and further improved a method demonstrated in a publically available patent (http://www.google.com/patents/WO2011056866A2?cl=en). Using the improved method, we constructed the small RNA libraries by using the total RNA of chondrosarcoma cell line. The adapter dimer was significantly reduced. The small RNA sequences were also analysed. The small RNA libraries of cultured chondrosarcoma cell line were constructed by using an improved protocol where high-definition (HD) adapters were used.
2015-01-31 | E-GEOD-59331 | biostudies-arrayexpress
Project description:Most of small RNA library construction methods are based on RNA ligases, which prefer to join the molecules (small RNAs and adapters) that can anneal to each other and form a ligase favoured structure. Different platforms for next generation sequencing use different adapter sequences, causing the cloning bias. Adapters with degenerated nucleotides at the ligating ends (High Definition, HD adapters) were developed to reduce the cloning bias. However, above 90% of the cloning products is adapter dimer when the current available commercial kits and their corresponding protocols are used. Here we adopted and further improved a method demonstrated in a publically available patent (http://www.google.com/patents/WO2011056866A2?cl=en). Using the improved method, we constructed the small RNA libraries by using the total RNA of Medicago truncatula leaf tissue. The adapter dimer was significantly reduced. The small RNA sequences were also analysed. The small RNA libraries of medicago truncatula leaves were constructed by using an improved protocol where high-definition (HD) adapters were used.
2015-01-31 | E-GEOD-59330 | biostudies-arrayexpress
Project description:The small RNA libraries from Moso bamboo (Phyllostachy heterocycla) roots and leaves were constructed by using high definition adapters . The small RNA profiles were analyzed. A collection of micro RNAs with similarity to the micro RNA entries in mirbase were discovered. The putative genomic loci of the micro RNAs were identified. Analysis of small RNA profiles from the root and leaf tissues of young Moso Bamboo seedlings
2014-08-01 | E-GEOD-55305 | biostudies-arrayexpress
Project description:MicroRNAs play critical roles in various biological and metabolic processes. The function of miRNAs has been widely studied in model plants such as Arabidopsis and rice. However, the number of identified miRNAs and related miRNA targets in peach (Prunus persica) is limited. To understand further the relationship between miRNAs and their target genes during tissue development in peach, a small RNA library and three degradome libraries were constructed from three tissues for deep sequencing. We identified 117 conserved miRNAs and 186 novel miRNA candidates in peach by deep sequencing and 19 conserved miRNAs and 13 novel miRNAs were further evaluated for their expression by RT-qPCR. The number of gene targets that were identified for 26 conserved miRNA families and 38 novel miRNA candidates, were 172 and 87, respectively. Some of the identified miRNA targets were abundantly represented as conserved miRNA targets in plant. However, some of them were first identified and showed important roles in peach development. Our study provides information concerning the regulatory network of miRNAs in peach and advances our understanding of miRNA functions during tissue development. To identify more conserved and peach-speciM-oM-,M-^Ac miRNAs and their target genes and to understand further the mechanism of miRNA-regulated target genes during tissue development in peach, a small RNA library and three degradome libraries were constructed from three different tissues for deep sequencing.
2014-01-01 | E-GEOD-49579 | biostudies-arrayexpress