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An evolutionary and molecular analysis of Bmp2 expression.
Kevin L Abrams1, Junwang Xu, Celine Nativelle-Serpentini
1Department of Biology, University of South Florida, Tampa, Florida 33620, USA.
The Journal of Biological Chemistry
|February 6, 2004
Summary
Conserved noncoding sequences regulate bone morphogenetic protein 2 (BMP2) gene expression across diverse species. This study identified novel regulatory elements controlling BMP2, revealing conserved mechanisms underlying morphological evolution.
Area of Science:
- Evolutionary Developmental Biology
- Molecular Genetics
- Comparative Genomics
Background:
- Metazoan gene coding regions, including bone morphogenetic protein (BMP) 2, show high sequence conservation.
- Differential gene expression is hypothesized to drive morphological diversity despite conserved protein sequences.
Purpose of the Study:
- To investigate the conservation of regulatory mechanisms controlling the evolutionarily ancient Bmp2 gene.
- To identify and functionally test conserved noncoding sequences associated with Bmp2.
Main Methods:
- Comparative sequence analysis of flanking regions of Bmp2 genes across various species.
- Functional assays using reporter gene expression in the F9 cell model.
- Identification of conserved noncoding sequences, including promoter regions and downstream elements.
Main Results:
- Numerous conserved noncoding sequences were identified, some dating back to the divergence of fish lineages.
- Mouse and primate Bmp2 promoters drove reporter gene expression in F9 cells, mimicking endogenous patterns.
- A conserved Sp1 site was found to mediate retinoic acid responsiveness in the Bmp2 promoter.
- A conserved downstream sequence influenced reporter gene expression and may affect Bmp2 transcript half-life.
Conclusions:
- The regulatory mechanisms controlling Bmp2 expression are conserved across diverse species.
- Novel regulatory elements in both promoter and downstream regions of Bmp2 have been identified.
- These findings provide insights into the molecular basis of morphological evolution driven by gene regulation.