期刊
NATURE GENETICS
卷 48, 期 5, 页码 575-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ng.3542
关键词
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资金
- National Institutes of Health [R01 NS039421, R21 EY023104]
- National Science Foundation [1258169]
- Louis-Jeantet Foundation
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1258169] Funding Source: National Science Foundation
Genomic approaches have predicted hundreds of thousands of tissue-specific cis-regulatory sequences, but the determinants critical to their function and evolutionary history are mostly unknown(1-4). Here we systematically decode a set of brain enhancers active in the zona limitans intrathalamica (zli), a signaling center essential for vertebrate forebrain development via the secreted morphogen Sonic hedgehog (Shh)(5,6). We apply a de novo motif analysis tool to identify six position-independent sequence motifs together with their cognate transcription factors that are essential for zli enhancer activity and Shh expression in the mouse embryo. Using knowledge of this regulatory lexicon, we discover new Shh zli enhancers in mice and a functionally equivalent element in hemichordates, indicating an ancient origin of the Shh zli regulatory network that predates the chordate phylum. These findings support a strategy for delineating functionally conserved enhancers in the absence of overt sequence homologies and over extensive evolutionary distances.
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