Projects per year
Abstract
Background: Growth/differentiation factor 8 (GDF8) and GDF11 are two highly similar members of the transforming growth factor β (TGFβ) family. While GDF8 has been recognized as a negative regulator of muscle growth and differentiation, there are conflicting studies on the function of GDF11 and whether GDF11 has beneficial effects on age-related dysfunction. To address whether GDF8 and GDF11 are functionally identical, we compared their signaling and structural properties. Results: Here we show that, despite their high similarity, GDF11 is a more potent activator of SMAD2/3 and signals more effectively through the type I activin-like receptor kinase receptors ALK4/5/7 than GDF8. Resolution of the GDF11:FS288 complex, apo-GDF8, and apo-GDF11 crystal structures reveals unique properties of both ligands, specifically in the type I receptor binding site. Lastly, substitution of GDF11 residues into GDF8 confers enhanced activity to GDF8. Conclusions: These studies identify distinctive structural features of GDF11 that enhance its potency, relative to GDF8; however, the biological consequences of these differences remain to be determined.
Original language | English |
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Article number | 19 |
Number of pages | 22 |
Journal | BMC Biology |
Volume | 15 |
Issue number | 1 |
DOIs | |
Publication status | Published - 3 Mar 2017 |
Keywords
- Ligands
- Myostatin
- Receptor
- Structure
- Transforming growth factor β (TGFβ)
Projects
- 1 Finished
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Targeting activins to treat cachexia
Gregorevic, P., Harrison, C. & de Kretser, D.
National Health and Medical Research Council (NHMRC) (Australia)
1/01/15 → 31/12/18
Project: Research