期刊
MOLECULAR ENDOCRINOLOGY
卷 20, 期 9, 页码 1972-1981出版社
OXFORD UNIV PRESS INC
DOI: 10.1210/me.2005-0481
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资金
- NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES [R01DK064034] Funding Source: NIH RePORTER
- NIDDK NIH HHS [DK64034] Funding Source: Medline
Down-regulation of receptor in response to ligand was one of the earliest functional readouts of steroid hormone action. The loss of total receptor content upon stimulation, referred to initially as receptor processing, was carefully described with respect to receptor nuclear transformation or tight nuclear binding. It was these early studies that were the first to note a correlation between receptor turnover and induction of gene transcription, leading to the proposal that down-regulation of receptor was involved in mechanisms of transcriptional activation. This idea has now attracted renewed attention with the discovery that ligand-induced processing in the form of proteolysis is carried out by the 26S proteasome, a multicatalytic enzyme whose activity is directly coupled to cell-cycle control, signal transduction, and importantly, transcription. Here, we review our current understanding of the mechanism and relevance of proteolysis to receptor function based on general concepts that have emerged from analyses of liganded members of the nuclear receptor family.
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