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Functional probing of glucocorticoid receptor structure
J Carlstedt-Duke1, J A Gustafsson
1Department of Medical Nutrition, Karolinska Institute, Huddinge University Hospital, Sweden.
Journal of Steroid Biochemistry
|October 1, 1988
Summary
Researchers identified key amino acid residues involved in the glucocorticoid receptor
Area of Science:
- Molecular biology
- Biochemistry
- Genetics
Background:
- The glucocorticoid receptor (GR) is a crucial protein involved in cellular responses to glucocorticoids.
- Understanding the structural and functional domains of GR is essential for deciphering its mechanism of action.
Purpose of the Study:
- To delineate the functional domains of the glucocorticoid receptor.
- To identify specific amino acid residues responsible for steroid binding.
Main Methods:
- Sequence analysis was employed to determine the boundaries of the functional domains.
- Affinity-labelling and radiosequence analysis were used to probe steroid-receptor interactions.
Main Results:
- The steroid-binding domain was localized to the C-terminal end, with its border identified at residue 518.
- The DNA-binding domain was mapped to the central region, spanning residues 414 to 517.
- Three specific amino acid residues (Met-622, Cys-656, and Cys-754) were identified as critical for steroid binding.
Conclusions:
- The study successfully mapped the functional domains of the glucocorticoid receptor.
- Key residues involved in steroid binding were pinpointed, providing insights into ligand-receptor interactions.