Dicer-1 and R3D1-L catalyze microRNA maturation in Drosophila.
In Drosophila melanogaster, Dicer-2/R2D2 and Dicer-1 generate small interfering RNA (siRNA) and microRNA (miRNA), respectively. Here we identify a novel dsRNA-binding protein, which we named R3D1-L, that forms a stable complex with Dicer-1 in vitro and in vivo. While depletion of R3D1-L by RNAi causes accumulation of precursor miRNA (pre-miRNA) in S2 cells, recombinant R3D1-L enhances miRNA production by Dicer-1 in vitro. Furthermore, R3D1 deficiency causes miRNA-generating defect and severe sterility in male and female flies. Therefore, R3D1-L functions in concert with Dicer-1 in miRNA biogenesis and is required for reproductive development in Drosophila.
Department of Biochemistry, Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.
Feng
F
Jiang
Xuecheng
X
Ye
Xiang
X
Liu
Lauren
L
Fincher
Dennis
D
McKearin
Qinghua
Q
Liu
D000255:Adenosine Triphosphate / Q000378:metabolism; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism*; D004331:Drosophila melanogaster / Q000235:genetics* / Q000378:metabolism*; D005260:Female; D066298:In Vitro Techniques; D007246:Infertility / Q000235:genetics / Q000378:metabolism; D008297:Male; D035683:MicroRNAs / Q000235:genetics / Q000378:metabolism*; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D020365:RNA Helicases / Q000235:genetics / Q000378:metabolism; D034622:RNA Interference; D012323:RNA Processing, Post-Transcriptional; D016601:RNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D043244:Ribonuclease III / Q000378:metabolism*; D017386:Sequence Homology, Amino Acid; D013379:Substrate Specificity
D029721:Drosophila Proteins; C503213:Loqs protein, Drosophila; D035683:MicroRNAs; D016601:RNA-Binding Proteins; D011994:Recombinant Proteins; D000255:Adenosine Triphosphate; C478069:DCR-2 protein, Drosophila; D043244:Ribonuclease III; D020365:RNA Helicases