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microRNA

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Also known as miRNA, microribonucleic acid, microRNAs

thumb|400px|Pre-miRNA instead of Pri-miRNA in the first point of mechanism. Diagram of microRNA (miRNA) action with mRNA thumb|400px|Examples of miRNA hairpins (stem-loops), with the mature miRNAs shown in red

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MicroRNAs
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~50 min read

Article

37 sections
Contents
  • History
  • Nomenclature
  • Targets
  • Biogenesis
  • Transcription
  • Nuclear processing
  • Nuclear export
  • Cytoplasmic processing
  • Biogenesis in plants
  • RNA-induced silencing complex
  • Mode of silencing and regulatory loops
  • Turnover
  • Cellular functions
  • Evolution
  • Experimental detection and manipulation
  • Human and animal diseases
  • Inherited diseases
  • Cancer
  • DNA repair and cancer
  • Heart disease
  • miRNA-712
  • Origin
  • Mechanism
  • Human homolog microRNA-205
  • Kidney disease
  • Nervous system
  • Stroke
  • Alcoholism
  • Obesity
  • Hemostasis
  • Plants
  • Viruses
  • Target prediction
  • See also
  • References
  • Further reading
  • External links

thumb|400px|Pre-miRNA instead of Pri-miRNA in the first point of mechanism. Diagram of microRNA (miRNA) action with mRNA thumb|400px|Examples of miRNA hairpins (stem-loops), with the mature miRNAs shown in red

Micro ribonucleic acid (microRNA, miRNA, μRNA) are small, single-stranded, non-coding RNA molecules containing 21–23 nucleotides. Found in plants, animals, and even some viruses, miRNAs are involved in RNA silencing and post-transcriptional regulation of gene expression. miRNAs base-pair to complementary sequences in messenger RNA (mRNA) molecules, then silence said mRNA molecules by one or more of the following processes: Cleaving the mRNA strand into two pieces. Destabilizing the mRNA by shortening its poly(A) tail. Reducing translation of the mRNA into proteins.

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