Display Settings:


Send to:

Choose Destination
See comment in PubMed Commons below
Mol Cell. 2010 May 14;38(3):465-75. doi: 10.1016/j.molcel.2010.03.008. Epub 2010 Apr 8.

DNA methylation mediated by a microRNA pathway.

Author information

  • 1National Institute of Biological Sciences, Zhongguancun Life Science Park, Beijing 102206, China; College of Life Sciences, Beijing Normal University, Beijing 100875, China.


In plants, the known microRNAs (miRNAs) are produced as approximately 21 nucleotide (nt) duplexes from their precursors by Dicer-like 1 (DCL1). They are incorporated into Argonaute 1 (AGO1) protein to regulate target gene expression primarily through mRNA cleavage. We report here the discovery of a class of miRNAs in the model monocot rice (Oryza sativa). These are 24 nt in length and require another member of the Dicer family, DCL3, for their biogenesis. The 24 nt long miRNAs (lmiRNAs) are loaded into AGO4 clade proteins according to hierarchical rules, depending on the upstream biogenesis machinery and the 5'-terminal nucleotide. We demonstrated that lmiRNAs direct DNA methylation at loci from which they are produced as well as in trans at their target genes and play roles in gene regulation. Considered together, our findings define a miRNA pathway that mediates DNA methylation.

Copyright (c) 2010 Elsevier Inc. All rights reserved.

[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for Faculty of 1000
    Loading ...
    Write to the Help Desk