Dueck, Anne; Ziegler, Christian; Eichner, AlexanderIST Austria; Berezikov, Eugène; Meister, Gunter
MicroRNAs (miRNAs) are small noncoding RNAs that function in literally all cellular processes. miRNAs interact with Argonaute (Ago) proteins and guide them to specific target sites located in the 3′-untranslated region (3′-UTR) of target mRNAs leading to translational repression and deadenylation-induced mRNA degradation. Most miRNAs are processed from hairpin-structured precursors by the consecutive action of the RNase III enzymes Drosha and Dicer. However, processing of miR-451 is Dicer independent and cleavage is mediated by the endonuclease Ago2. Here we have characterized miR-451 sequence and structure requirements for processing as well as sorting of miRNAs into different Ago proteins. Pre-miR-451 appears to be optimized for Ago2 cleavage and changes result in reduced processing. In addition, we show that the mature miR-451 only associates with Ago2 suggesting that mature miRNAs are not exchanged between different members of the Ago protein family. Based on cloning and deep sequencing of endogenous miRNAs associated with Ago1-3, we do not find evidence for miRNA sorting in human cells. However, Ago identity appears to influence the length of some miRNAs, while others remain unaffected.
Nucleic Acids Research
Deutsche Forschungsgemeinschaft (DFG) (SFB 960 and FOR855); European Research Council (ERC grant ‘sRNAs’); European Union (FP7 project ‘ONCOMIRs’); German Bundesministerium für Bildung und Forschung (BMBF, NGFN+, FKZ PIM-01GS0804-5); Bavarian Genome Research Network (BayGene to G.M.); The Netherlands Organization for Scientific Research (NWO, VIDI grant to E.B.). Funding for open access charge: DFG via the open access publishing program. We thank Sigrun Ammon and Corinna Friederich for technical assistance and Sebastian Petri and Daniel Schraivogel for helpful discussions.
9850 - 9862
Dueck A, Ziegler C, Eichner A, Berezikov E, Meister G. MicroRNAs associated with the different human Argonaute proteins. Nucleic Acids Research. 2012;40(19):9850-9862. doi:10.1093/nar/gks705
Dueck, A., Ziegler, C., Eichner, A., Berezikov, E., & Meister, G. (2012). MicroRNAs associated with the different human Argonaute proteins. Nucleic Acids Research. Oxford University Press. https://doi.org/10.1093/nar/gks705
Dueck, Anne, Christian Ziegler, Alexander Eichner, Eugène Berezikov, and Gunter Meister. “MicroRNAs Associated with the Different Human Argonaute Proteins.” Nucleic Acids Research. Oxford University Press, 2012. https://doi.org/10.1093/nar/gks705.
A. Dueck, C. Ziegler, A. Eichner, E. Berezikov, and G. Meister, “MicroRNAs associated with the different human Argonaute proteins,” Nucleic Acids Research, vol. 40, no. 19. Oxford University Press, pp. 9850–9862, 2012.
Dueck A, Ziegler C, Eichner A, Berezikov E, Meister G. 2012. MicroRNAs associated with the different human Argonaute proteins. Nucleic Acids Research. 40(19), 9850–9862.
Dueck, Anne, et al. “MicroRNAs Associated with the Different Human Argonaute Proteins.” Nucleic Acids Research, vol. 40, no. 19, Oxford University Press, 2012, pp. 9850–62, doi:10.1093/nar/gks705.
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