Endocrinology, Vol 102, 1429-1435, Copyright © 1978 by Endocrine Society

ARTICLES

Displacement of estradiol from estrogen receptors by simple alkyl phenols

GC Mueller and UH Kim

Simple alkyl phenols have been tested for their ability to prevent the binding of [3H]estradiol and to displace the prebound hormone from estrogen receptors of uterine cytosols. Tetrahydronaphthol, an analog of the A and B rings of estradiol, is highly effective in preventing the forward bindng of estradiol. p-sec-Amyl phenol (pSAP) with a flexible alkyl chain corresponding to the B ring of estradiol is highly effective at 0 C in displacing estradiol which had been prebound by the receptor. Both compounds were more effective at 0 C than at 23 C. The data are discussed in terms of sequential conformational changes which might be required for the binding and release of the natural hormones and their possible relevance to receptor action.

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