MiRNA-biogenesis
(c) Narayanese at engelsk Wikipedia, CC BY-SA 3.0
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Overview of microRNA processing in animals, from transcription to the formation of the effector complex. There are two pathways, one for microRNAs from independent genes and one for intronic microRNAs.
pri-miRNA = primary microRNA transcript
pre-mRNA = precursor messenger RNA
pre-miRNA = precursor microRNA
miRNA = microRNA
miRNA* = antisense microRNA
miRNP = microRNA ribonucleoprotein
Enzymes in the picture:
Drosha, Pasha (pri-miRNA → pre-miRNA)
Spliceosome (pre-mRNA → intron lariat)
Debranching enzyme (intron lariat → RNA that can fold into pre-miRNA)
RAN-GTP, Exportin-5 (export from nucleus)
Dicer (pre-miRNA → miRNA)
pri-miRNA = primary microRNA transcript
pre-mRNA = precursor messenger RNA
pre-miRNA = precursor microRNA
miRNA = microRNA
miRNA* = antisense microRNA
miRNP = microRNA ribonucleoprotein
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