Back to Search
Start Over
Constitutive activation of the thyrotropin receptor by deletion of a portion of the extracellular domain
- Source :
- Biochemical and biophysical research communications. 211(1)
- Publication Year :
- 1995
-
Abstract
- Mutations involving the transmembrane domain of the thyrotropin receptor (TSHR) confer constitutive activation of the receptor and can cause human diseases. Naturally occurring activating mutations identified to date are located only in the transmembrane domain of the receptor. We now report a mutant involving the extracellular domain of the TSHR which also shows constitutive activation. This mutation is missing residues 339-367 located in the C-terminal portion of the extracellular domain. When expressed in COS-7 cells, the mutated TSHR (M3B) retained similar TSH binding ability to that of the wild-type receptor. However, the basal cAMP production without TSH stimulation in COS-7 cells transfected with M3B cDNA was significantly higher than that of COS-7 cells with wild-type receptor, indicating that the mutant receptor is constitutively activated. Our results provide new insight into the mechanism of receptor activation.
- Subjects :
- endocrine system
endocrine system diseases
B-cell receptor
Biophysics
Thyrotropin
Biology
Kidney
Transfection
Biochemistry
Thyrotropin receptor
Cell Line
Thyrotropin-releasing hormone receptor
Chlorocebus aethiops
Enzyme-linked receptor
Cyclic AMP
Animals
Humans
5-HT5A receptor
Receptor
Molecular Biology
Sequence Deletion
Cell Membrane
Receptors, Thyrotropin
Cell Biology
Recombinant Proteins
Cell biology
Rats
Transmembrane domain
Kinetics
Interleukin-21 receptor
Cancer research
hormones, hormone substitutes, and hormone antagonists
Subjects
Details
- ISSN :
- 0006291X
- Volume :
- 211
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Biochemical and biophysical research communications
- Accession number :
- edsair.doi.dedup.....ff1305f69b339fdf54cd04bda2f55ee0