PUBLICATION
Type IV collagen is an activating ligand for the adhesion G protein-coupled receptor GPR126
- Authors
- Paavola, K.J., Sidik, H., Zuchero, J.B., Eckart, M., Talbot, W.S.
- ID
- ZDB-PUB-140815-8
- Date
- 2014
- Source
- Science signaling 7: ra76 (Journal)
- Registered Authors
- Talbot, William S.
- Keywords
- none
- MeSH Terms
-
- Myelin Sheath/metabolism*
- Collagen Type IV/metabolism*
- Humans
- Ear, Inner/embryology*
- Reverse Transcriptase Polymerase Chain Reaction
- Zebrafish
- Rats
- DNA Primers/genetics
- Cell Adhesion/physiology*
- HEK293 Cells
- Real-Time Polymerase Chain Reaction
- Cyclic AMP/metabolism
- Genetic Vectors/genetics
- Animals
- Protein Binding
- Cloning, Molecular
- Receptors, G-Protein-Coupled/genetics
- Receptors, G-Protein-Coupled/metabolism*
- Protein Structure, Tertiary
- Gene Components
- Schwann Cells/metabolism
- Biotinylation
- Mutation/genetics
- Signal Transduction/physiology*
- PubMed
- 25118328 Full text @ Sci. Signal.
Citation
Paavola, K.J., Sidik, H., Zuchero, J.B., Eckart, M., Talbot, W.S. (2014) Type IV collagen is an activating ligand for the adhesion G protein-coupled receptor GPR126. Science signaling. 7:ra76.
Abstract
GPR126 is an orphan heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptor (GPCR) that is essential for the development of diverse organs. We found that type IV collagen, a major constituent of the basement membrane, binds to Gpr126 and activates its signaling function. Type IV collagen stimulated the production of cyclic adenosine monophosphate in rodent Schwann cells, which require Gpr126 activity to differentiate, and in human embryonic kidney (HEK) 293 cells expressing exogenous Gpr126. Type IV collagen specifically bound to the extracellular amino-terminal region of Gpr126 containing the CUB (complement, Uegf, Bmp1) and pentraxin domains. Gpr126 derivatives lacking the entire amino-terminal region were constitutively active, suggesting that this region inhibits signaling and that ligand binding relieves this inhibition to stimulate receptor activity. A new zebrafish mutation that truncates Gpr126 after the CUB and pentraxin domains disrupted development of peripheral nerves and the inner ear. Thus, our findings identify type IV collagen as an activating ligand for GPR126, define its mechanism of activation, and highlight a previously unrecognized signaling function of type IV collagen in basement membranes.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping