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Canine Fibroblast Growth Factor Receptor 3 Sequence Is Conserved Across Dogs of Divergent Skeletal Size by Logan B Smith; Danika L Bannasch; Amy E Young; Deborah I Grossman; Janelle M Belanger; Anita M Oberbauer is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Background Fibroblast growth factor receptor 3 (FGFR3) is expressed in the growth plate of endochondral bones and serves as a negative regulator of linear bone elongation. Activating mutations severely limit bone growth, resulting in dwarfism, while inactivating mutations significantly enhance bone elongation and overall skeletal size. Domesticated dogs exhibit the greatest skeletal size diversity of any species and, given the regulatory role of FGFR3 on growth plate proliferation, we asked whether sequence differences in FGFR3 could account for some of the size differences. ## Methods All exons, the promoter region, and 60 bp of the 3' flanking region of the canine FGFR3 gene were sequenced for nine different dog breeds representing a spectrum of skeletal size. The resultant sequences were compared to the reference Boxer genome sequence. ## Results There was no variation in sequence for any FGFR3 exons, promoter region, or 3' flanking sequence across all breeds evaluated. ## Conclusion The results suggest that, regardless of domestication selection pressure to develop breeds having extreme differences in skeletal size, the FGFR3 gene is conserved. This implies a critical role f

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Author

Logan B Smith; Danika L Bannasch; Amy E Young; Deborah I Grossman; Janelle M Belanger; Anita M Oberbauer

Publisher

BioMed Central; Springer (Biomed Central Ltd.); London: BioMed Central, 2000-; Springer Science and Business Media LLC (ISSN 1471-2156)

Published

2008

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)