a double strand RNA binding protein (dsRBP) which is essential for the first processing step of primary miRNAs (pri-miRNAs). Apparently binds and is activated by heme. A nuclear complex of Drosha with DGCR8 cleaves pri-miRNA substrates into 60-70 nucleotide intermediates (pre-miRNA), thus initiating the microRNA maturation process. Drosha provides the catalytic site for this cleavage, whereas DGCR8 (Pasha) anchors substrate pri-miRNAs. Pre-miRNAs are then processed by the cytoplasmic Dicer-TRBP complex to approximately 20-22 nt mature miRNAs. Note: This description may include information from UniProtKB.
Protein type: Nucleolus; RNA processing; RNA-binding