title: The glucocorticoid receptor protein binds to transfer RNA.
abstract: The glucocorticoid receptor from mouse AtT-20 cells exists in three forms: the untransformed receptor (9.1S; Mr of 319,000), a large oligomeric molecule that does not bind to DNA; the transformed receptor (4S; Mr of 96,000), which is formed by dissociation of untransformed receptor after steroid binding and which binds to DNA to modulate gene expression; and an intermediate size receptor (6S; Mr of 132,000), which also binds to DNA and contains a bound small RNA molecule. This RNA species has now been purified and identified as transfer RNA (tRNA). The three tRNA's for the basic amino acids accounted for about 78% of the total amino acid-accepting activity [arginine (52%), lysine (17%), and histidine (9%)], while the remaining 22% was represented by six other tRNA species. This tRNA-binding activity of the glucocorticoid receptor may reflect post-transcriptional mechanisms of regulating gene expression, such as alterations in the translational efficiency of or the modulation of the stability of hormone-induced proteins.
mesh_terms: D000818:Animals; D004268:DNA-Binding Proteins / Q000378:metabolism; D005786:Gene Expression Regulation; D051379:Mice; D008970:Molecular Weight; D012343:RNA, Transfer / Q000145:classification / Q000378:metabolism*; D011965:Receptors, Glucocorticoid / Q000378:metabolism*
chemical_list: D004268:DNA-Binding Proteins; D011965:Receptors, Glucocorticoid; D012343:RNA, Transfer