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Dev Cell. August 17, 2010; 19 (2): 220-31.

beta-Catenin primes organizer gene expression by recruiting a histone H3 arginine 8 methyltransferase, Prmt2.

An emerging concept in development is that transcriptional poising presets patterns of gene expression in a manner that reflects a cell''s developmental potential. However, it is not known how certain loci are specified in the embryo to establish poised chromatin architecture as the developmental program unfolds. We find that, in the context of transcriptional quiescence prior to the midblastula transition in Xenopus, dorsal specification by the Wnt/beta-catenin pathway is temporally uncoupled from the onset of dorsal target gene expression, and that beta-catenin establishes poised chromatin architecture at target promoters. beta-catenin recruits the arginine methyltransferase Prmt2 to target promoters, thereby establishing asymmetrically dimethylated H3 arginine 8 (R8). Recruitment of Prmt2 to beta-catenin target genes is necessary and sufficient to establish the dorsal developmental program, indicating that Prmt2-mediated histone H3(R8) methylation plays a critical role downstream of beta-catenin in establishing poised chromatin architecture and marking key organizer genes for later expression.

PubMed ID: 20708585
PMC ID: PMC2923644
Article link: Dev Cell.
Grant support: R01-GM76621 NIGMS NIH HHS , T32-GM007229 NIGMS NIH HHS , T32-HD007516 NICHD NIH HHS , R01 GM076621-01A1 NIGMS NIH HHS , R01 GM076621-02 NIGMS NIH HHS , R01 GM076621-03 NIGMS NIH HHS , R01 GM076621-04 NIGMS NIH HHS , R01 GM076621 NIGMS NIH HHS , T32 HD007516 NICHD NIH HHS , T32 GM007229 NIGMS NIH HHS

Genes referenced: ctnnb1 eef1a2 h3f3a lef1 myc myl2 nodal3.1 nodal5 nodal5.2 nodal6 odc1 prmt2 sia1

Morpholinos referenced: ctnnb1 MO1 prmt2 MO1

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Akkers, 2009, Pubmed, Xenbase[+]

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