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This microRNA database and microRNA targets databases is a compilation of databases and web portals and servers used for microRNAs and their targets. MicroRNAs (miRNAs) represent an important class of small non-coding RNAs (ncRNAs) that regulate gene expression by targeting messenger RNAs.
database of protein similarities computed using FASTA: Protein model databases Swiss-model: server and repository for protein structure models Protein model databases AAindex: database of amino acid indices, amino acid mutation matrices, and pair-wise contact potentials Protein model databases BioGRID: Samuel Lunenfeld Research Institute
The miRBase registry provides a centralised system for assigning new names to microRNA genes. [6] miRBase grew from the microRNA registry resource set up by Sam Griffiths-Jones in 2003. [7] According to Ana Kozomara and Sam Griffiths-Jones miRBase has five aims: [1] To provide a consistent naming system for microRNAs
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miRBase is considered to be the gold-standard miRNA database—it stores miRNA sequences detected by thousand of experiments. In this database each miRNA is associated with a miRNA precursor and with one or two mature miRNA (-5p and -3p). In the past it had always been said that the same miRNA precursor generates the same miRNA sequences.
Many mammalian genomes encode four closely related miR-29 precursors that are transcribed in two transcriptional units. For example, human miR-29a and miR-29b-1 are processed from an intron of a long non-coding transcript pri-miRNA (lnc-pri-miRNA) LOC646329 from chromosome 7. miR-29b-2 (identical in sequence to miR-29b-1) and miR-29c are co-transcribed from chromosome 1.
The structure of pre-miR-206 as determined by RNA folding algorithms Identifiers for miR-206 sequence in various RNA and genomic databases. MiR-206 is a microRNA with a sequence conserved across most mammalian species, and in humans is a member of the myo-miR family of miRNAs, which includes miR-1, miR-133, and miR-208a/b.
For example, in the human genome there are three known miR-133 genes: miR-133a-1, miR-133a-2 and miR-133b found on chromosomes 18, 20 and 6 respectively. The mature sequence is excised from the 3' arm of the hairpin . miR-133 is expressed in muscle tissue and appears to repress the expression of non-muscle genes.