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Computational identification and characterization of conserved miRNAs and their target genes in garlic (Allium sativum L.) expressed sequence tags.

Gene | 2014

The endogenous small non-coding functional microRNAs (miRNAs) are short in size, range from ~21 to 24 nucleotides in length, play a pivotal role in gene expression in plants and animals by silencing genes either by destructing or blocking of translation of homologous mRNA. Although various high-throughput, time consuming and expensive techniques like forward genetics and direct cloning are employed to detect miRNAs in plants but comparative genomics complemented with novel bioinformatic tools pave the way for efficient and cost-effective identification of miRNAs through homologous sequence search with previously known miRNAs. In this study, an attempt was made to identify and characterize conserved miRNAs in garlic expressed sequence tags (ESTs) through computational means. For identification of novel miRNAs in garlic, a total 3227 known mature miRNAs of plant kingdom Viridiplantae were searched for homology against 21,637 EST sequences resulting in identification of 6 potential miRNA candidates belonging to 6 different miRNA families. The psRNATarget server predicted 33 potential target genes and their probable functions for the six identified miRNA families in garlic. Most of the garlic miRNA target genes seem to encode transcription factors as well as genes involved in stress response, metabolism, plant growth and development. The results from the present study will shed more light on the understanding of molecular mechanisms of miRNA in garlic which may aid in the development of novel and precise techniques to understand some post-transcriptional gene silencing mechanism in response to stress tolerance.

Pubmed ID: 24434367 RIS Download

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This is a list of tools and resources that we have found mentioned in this publication.


miRBase (tool)

RRID:SCR_003152

Central online repository for microRNA nomenclature, sequence data, annotation and target prediction.Collection of published miRNA sequences and annotation.

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QuickGO (tool)

RRID:SCR_004608

A web-based browser for Gene Ontology terms and annotations, which is provided by the UniProtKB-GOA group at the EBI. It is able to offer a range of facilities including bulk downloads of GO annotation data which can be extensively filtered by a range of different parameters and GO slim set generation. The software for QuickGO is freely available under the Apache 2 license. QuickGO can supply GO term information and GO annotation data via REST web services.

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Nucleotide database (tool)

RRID:SCR_004630

Nucleotide database as collection of sequences from several sources, including GenBank, RefSeq, TPA and PDB. Genome, gene and transcript sequence data provide the foundation for biomedical research and discovery.

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InterPro (tool)

RRID:SCR_006695

Service providing functional analysis of proteins by classifying them into families and predicting domains and important sites. They combine protein signatures from a number of member databases into a single searchable resource, capitalizing on their individual strengths to produce a powerful integrated database and diagnostic tool. This integrated database of predictive protein signatures is used for the classification and automatic annotation of proteins and genomes. InterPro classifies sequences at superfamily, family and subfamily levels, predicting the occurrence of functional domains, repeats and important sites. InterPro adds in-depth annotation, including GO terms, to the protein signatures. You can access the data programmatically, via Web Services. The member databases use a number of approaches: # ProDom: provider of sequence-clusters built from UniProtKB using PSI-BLAST. # PROSITE patterns: provider of simple regular expressions. # PROSITE and HAMAP profiles: provide sequence matrices. # PRINTS provider of fingerprints, which are groups of aligned, un-weighted Position Specific Sequence Matrices (PSSMs). # PANTHER, PIRSF, Pfam, SMART, TIGRFAMs, Gene3D and SUPERFAMILY: are providers of hidden Markov models (HMMs). Your contributions are welcome. You are encouraged to use the ''''Add your annotation'''' button on InterPro entry pages to suggest updated or improved annotation for individual InterPro entries.

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CAP3 Sequence Assembly Program (tool)

RRID:SCR_007250

This form allows you to assemble a set of contiguous sequences (contigs) with the CAP3 program. The CAP3 program has a capability to clip 5'' and 3'' low-quality regions of reads. It uses base quality values in computation of overlaps between reads, construction of multiple sequence alignments of reads, and generation of consensus sequences. The program also uses forward-reverse constraints to correct assembly errors and link contigs. Results of CAP3 on four BAC data sets are presented. The performance of CAP3 was compared with that of PHRAP on a number of BAC data sets. PHRAP often produces longer contigs than CAP3 whereas CAP3 often produces fewer errors in consensus sequences than PHRAP. It is easier to construct scaffolds with CAP3 than with PHRAP on low-pass data with forward-reverse constraints. Sponsors: This project was supported by NIH Grant R01HG01502-02 from NHGRI. Keywords: CAP3, Program, Form, Computation, DNA, Dataset, Database, Program,

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Nucleotide database (tool)

RRID:SCR_016578

Nucleotide database as collection of sequences from several sources, including GenBank, RefSeq, TPA and PDB. Genome, gene and transcript sequence data provide the foundation for biomedical research and discovery.

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ClustalW (tool)

RRID:SCR_017277

Web sevice of ClustalW provided by DNA data bank of Japan.

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