TrnR2, a Novel Receptor That Mediates Neurturin and GDNF Signaling through Ret
Copyright policy )TrnR2, a Novel Receptor That Mediates Neurturin and GDNF Signaling through Ret
Glial cell line-derived neurotrophic factor (GDNF) and neurturin (NTN) comprise a family of TGF-beta-related neurotrophic factors (TRNs), which have trophic influences on a variety of neuronal populations. A receptor complex comprised of TrnR1 (GDNFR alpha) and Ret was recently identified and found to be capable of mediating both GDNF and NTN signaling. We have identified a novel receptor based on homology to TrnR1, called TrnR2, that is 48% identical to TrnR1, and is located on the short arm of chromosome 8. TrnR2 is attached to the cell surface via a GPI-linkage, and can mediate both NTN and GDNF signaling through Ret in vitro. Fibroblasts expressing TrnR2 and Ret are approximately 30-fold more sensitive to NTN than to GDNF treatment, whereas those expressing TrnR1 and Ret respond equivalently to both factors, suggesting the TrnR2-Ret complex acts preferentially as a receptor for NTN. TrnR2 and Ret are expressed in neurons of the superior cervical and dorsal root ganglia, and in the adult brain. Comparative analysis of TrnR1, TrnR2, and Ret expression indicates that multiple receptor complexes, capable of mediating GDNF and NTN signaling, exist in vivo.
- University of Mary United States
- National Cancer Institute United States
- Washington University in St. Louis United States
- WASHINGTON UNIVERSITY
Brain Chemistry, Male, Neurons, Glial Cell Line-Derived Neurotrophic Factor Receptors, Base Sequence, Neuroscience(all), Molecular Sequence Data, Neurturin, Age Factors, Chromosome Mapping, Gene Expression, Nerve Tissue Proteins, 3T3 Cells, Blotting, Northern, Mice, Animals, Newborn, Animals, Drosophila Proteins, Glial Cell Line-Derived Neurotrophic Factor, Nerve Growth Factors, In Situ Hybridization, Fluorescence
Brain Chemistry, Male, Neurons, Glial Cell Line-Derived Neurotrophic Factor Receptors, Base Sequence, Neuroscience(all), Molecular Sequence Data, Neurturin, Age Factors, Chromosome Mapping, Gene Expression, Nerve Tissue Proteins, 3T3 Cells, Blotting, Northern, Mice, Animals, Newborn, Animals, Drosophila Proteins, Glial Cell Line-Derived Neurotrophic Factor, Nerve Growth Factors, In Situ Hybridization, Fluorescence
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