GSBS Student Publications

UMMS Affiliation

Graduate School of Biomedical Sciences; Program in Gene Function and Expression; Program in Molecular Medicine

Date

9-17-2008

Document Type

Article

Medical Subject Headings

Animals; Animals, Genetically Modified; Caenorhabditis elegans; *Genome; MicroRNAs; Polymerase Chain Reaction; Transcription, Genetic

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

MicroRNAs (miRNAs) and transcription factors (TFs) are primary metazoan gene regulators. Whereas much attention has focused on finding the targets of both miRNAs and TFs, the transcriptional networks that regulate miRNA expression remain largely unexplored. Here, we present the first genome-scale Caenorhabditis elegans miRNA regulatory network that contains experimentally mapped transcriptional TF --> miRNA interactions, as well as computationally predicted post-transcriptional miRNA --> TF interactions. We find that this integrated miRNA network contains 23 miRNA <--> TF composite feedback loops in which a TF that controls a miRNA is itself regulated by that same miRNA. By rigorous network randomizations, we show that such loops occur more frequently than expected by chance and, hence, constitute a genuine network motif. Interestingly, miRNAs and TFs in such loops are heavily regulated and regulate many targets. This "high flux capacity" suggests that loops provide a mechanism of high information flow for the coordinate and adaptable control of miRNA and TF target regulons.

Y1H dataset can be found as a supplemental file to this paper. See Additional Files below.

Rights and Permissions

Citation: Genes Dev. 2008 Sep 15;22(18):2535-49. Link to article on publisher's site

Related Resources

Link to Article in PubMed

Journal Title

Genes and development

PubMed ID

18794350

Martinez_et_alGenesDev2008.xls (99 kB)
Y1H dataset (XLS, 100 KB)

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