Mammalian comparative sequence analysis of the Agrp locus.
Mammalian comparative sequence analysis of the Agrp locus.
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DOI：
10.1371/journal.pone.0000702
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发表时间：
2007-08-08
期刊：
影响因子：
3.7
通讯作者：
Barsh, Gregory S.
中科院分区：
文献类型：
--
作者：
Kaelin, Christopher B.;Cooper, Gregory M.;Sidow, Arend;Barsh, Gregory S.
Agouti-related protein encodes a neuropeptide that stimulates food intake. Agrp expression in the brain is restricted to neurons in the arcuate nucleus of the hypothalamus and is elevated by states of negative energy balance. The molecular mechanisms underlying Agrp regulation, however, remain poorly defined. Using a combination of transgenic and comparative sequence analysis, we have previously identified a 760 bp conserved region upstream of Agrp which contains STAT binding elements that participate in Agrp transcriptional regulation. In this study, we attempt to improve the specificity for detecting conserved elements in this region by comparing genomic sequences from 10 mammalian species. Our analysis reveals a symmetrical organization of conserved sequences upstream of Agrp, which cluster into two inverted repeat elements. Conserved sequences within these elements suggest a role for homeodomain proteins in the regulation of Agrp and provide additional targets for functional evaluation.
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