Work

Demonstration that the 90-Kilodalton Heat Shock Protein is Bound to the Glucocorticoid Receptor in its 9S Nondeoxynucleic Acid Binding Form

Year: 1987

Type: article

Abstract: The 9S molybdate-stabilized form of the glucocorticoid receptor of mouse L cell lysates was immunoadsorbed to protein-A-Sepharose with antiserum directed against the 89-kilodalton chicken heat shock protein (anti-hsp89). In order to achieve this, "free" (nonreceptor associated) hsp90 was first separated from the molybdate-stabilized 9S receptor by sucrose gradient sedimentation. Incubation of the 9S [3H]triamcinolone acetonide-labeled receptor peak with anti-hsp89 results in the immune-specific adsorption of 20% of the specifically bound radioactivity and adsorption of the 100-kilodalton receptor protein, as detected by Western-blotting, using the GR49 antireceptor monoclonal antibody as probe. These observations provide the only direct proof that hsp90 is a component of the 9S form of a steroid receptor.

Source: Molecular Endocrinology

DOI: 10.1210/mend-1-12-908

Authors: Edwin R. Sanchez, Soheil Meshinchi, Milton J. Schlesinger, William B. Pratt

Institutions: Washington University in St. Louis, University of Michigan, Michigan Medicine

Language: English

Topic: Heat shock proteins research

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: bronze

Funder: National Cancer Institute

Award: G4363728893