Fliss A E, Fang Y, Boschelli F, Caplan A J
Department of Cell Biology and Anatomy, Mount Sinai Medical Center, New York, New York 10029, USA.
Mol Biol Cell. 1997 Dec;8(12):2501-9. doi: 10.1091/mbc.8.12.2501.
The CDC37 gene is essential for the activity of p60(v-src) when expressed in yeast cells. Since the activation pathway for p60(v-src) and steroid hormone receptors is similar, the present study analyzed the hormone-dependent transactivation by androgen receptors and glucocorticoid receptors in yeast cells expressing a mutant version of the CDC37 gene. In this mutant, hormone-dependent transactivation by androgen receptors was defective at both permissive and restrictive temperatures, although transactivation by glucocorticoid receptors was mildly defective only at the restrictive temperature. Cdc37p appears to function via the androgen receptor ligand-binding domain, although it does not influence receptor hormone-binding affinity. Models for Cdc37p regulation of steroid hormone receptors are discussed.
CDC37基因对于p60(v-src)在酵母细胞中表达时的活性至关重要。由于p60(v-src)和类固醇激素受体的激活途径相似,本研究分析了在表达CDC37基因突变体的酵母细胞中雄激素受体和糖皮质激素受体的激素依赖性反式激活作用。在这种突变体中,雄激素受体的激素依赖性反式激活在允许温度和限制温度下均存在缺陷,尽管糖皮质激素受体的反式激活仅在限制温度下有轻微缺陷。Cdc37p似乎通过雄激素受体配体结合域发挥作用,尽管它不影响受体激素结合亲和力。文中讨论了Cdc37p对类固醇激素受体的调节模型。