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Updated: Aug 9, 2026

Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins
Published on: October 4, 2017
Possible difference in glycosylation of the thyrotropin receptor among species
1Department of Laboratory Medicine, Kyoto University School of Medicine, Japan.
Abstract:
Residue 113 of the thyrotropin receptor (TSHR) is a possible asparagine-linked glycosylation site in the human TSHR, but not in rat or dog TSHR. Russo et al. (Mol Endocrinol 5:29-33) reported that mutation of this residue in the human TSHR diminished TSH binding activity after transfection. To investigate the difference in the role of residue 113 of the TSHR among species, we created a mutant at residue 113 in the rat TSHR, transfected Cos-7 cells with the mutant DNA and measured TSH binding and TSH- and Graves' IgG-stimulated cAMP and phosphoinositide signals. No difference was found in the activities of the mutant transfectant from the wild type receptor transfectant. These results might suggest a real difference in glycosylation of the TSHR among species.
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