title: Comparative genomics identifies the mouse Bmp3 promoter and an upstream evolutionary conserved region (ECR) in mammals.
abstract: The Bone Morphogenetic Protein (BMP) pathway is a multi-member signaling cascade whose basic components are found in all animals. One member, BMP3, which arose more recently in evolution and is found only in deuterostomes, serves a unique role as an antagonist to both the canonical BMP and Activin pathways. However, the mechanisms that control BMP3 expression, and the cis-regulatory regions mediating this regulation, remain poorly defined. With this in mind, we sought to identify the Bmp3 promoter in mouse (M. musculus) through functional and comparative genomic analyses. We found that the minimal promoter required for expression in resides within 0.8 kb upstream of Bmp3 in a region that is highly conserved with rat (R. norvegicus). We also found that an upstream region abutting the minimal promoter acts as a repressor of the minimal promoter in HEK293T cells and osteoblasts. Strikingly, a portion of this region is conserved among all available eutherian mammal genomes (47/47), but not in any non-eutherian animal (0/136). We also identified multiple conserved transcription factor binding sites in the Bmp3 upstream ECR, suggesting that this region may preserve common cis-regulatory elements that govern Bmp3 expression across eutherian mammals. Since dysregulation of BMP signaling appears to play a role in human health and disease, our findings may have application in the development of novel therapeutics aimed at modulating BMP signaling in humans.
authors: Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Massachusetts, United States of America.
authors: Jonathan W
authors: JW
authors: Lowery
authors: Anna W
authors: AW
authors: Lavigne
authors: Shoichiro
authors: S
authors: Kokabu
authors: Vicki
authors: V
authors: Rosen
mesh_terms: D000818:Animals; D001665:Binding Sites; D005075:Biological Evolution; D055398:Bone Morphogenetic Protein 3 / Q000235:genetics* / Q000378:metabolism; D002460:Cell Line; D017124:Conserved Sequence; D023281:Genomics / Q000379:methods; D057809:HEK293 Cells; D006801:Humans; D008322:Mammals / Q000378:metabolism; D051379:Mice; D011401:Promoter Regions, Genetic; D051381:Rats; D012045:Regulatory Sequences, Nucleic Acid; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
chemical_list: C525758:Bmp3 protein, mouse; D055398:Bone Morphogenetic Protein 3; D014157:Transcription Factors