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A fast-evolving human NPAS3 enhancer gained reporter expression in the developing forebrain of transgenic mice
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A fast-evolving human NPAS3 enhancer gained reporter expression in the developing forebrain of transgenic mice
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A fast-evolving human NPAS3 enhancer gained reporter expression in the developing forebrain of transgenic mice
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Journal Article
A fast-evolving human NPAS3 enhancer gained reporter expression in the developing forebrain of transgenic mice
2013
Overview
The developmental brain gene NPAS3 stands out as a hot spot in human evolution because it contains the largest number of human-specific, fast-evolving, conserved, non-coding elements. In this paper we studied 2xHAR142, one of these elements that is located in the fifth intron of NPAS3. Using transgenic mice, we show that the mouse and chimp 2xHAR142 orthologues behave as transcriptional enhancers driving expression of the reporter gene lacZ to a similar NPAS3 expression subdomain in the mouse central nervous system. Interestingly, the human 2xHAR142 orthologue drives lacZ expression to an extended expression pattern in the nervous system. Thus, molecular evolution of 2xHAR142 provides the first documented example of human-specific heterotopy in the forebrain promoted by a transcriptional enhancer and suggests that it may have contributed to assemble the unique properties of the human brain.
