The steroid hormone progesterone regulates many critical aspects of vertebrate physiology. The nuclear receptor for progesterone functions as a ligand-activated transcription factor, directly regulating gene expression. This type of signalling is referred to as the ‘genomic’ pathway. Nevertheless, progesterone also stimulates rapid physiological effects that are independent of transcription. This pathway, termed ‘non-genomic’, is mediated by the mPRs (membrane progesterone receptors). These mPRs belong to a larger class of membrane receptors called PAQRs (progestin and adipoQ receptors), which include receptors for adiponectin in vertebrates and osmotin in fungi. mPRs have been shown to activate inhibitory G-proteins, suggesting that they act as GPCRs (G-protein-coupled receptors). However, PAQRs do not resemble GPCRs with respect to topology or conserved sequence motifs. Instead, they more closely resemble proteins in the alkaline ceramidase family and they may possess enzymatic activity. In the present paper, we highlight the evidence in support of each model and what is currently known for PAQR signal transduction of this non-canonical receptor.
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February 2012
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Conference Article|
January 19 2012
Non-genomic progesterone signalling and its non-canonical receptor
Patricia Moussatche;
Patricia Moussatche
1Foundation for Applied Molecular Evolution, P.O. Box 13174, Gainesville, FL 32604, U.S.A.
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Thomas J. Lyons
Thomas J. Lyons
1
1Foundation for Applied Molecular Evolution, P.O. Box 13174, Gainesville, FL 32604, U.S.A.
1To whom correspondence should be addressed (email tlyons@ffame.org).
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Publisher: Portland Press Ltd
Received:
July 14 2011
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2012 The Authors Journal compilation
2012
Biochem Soc Trans (2012) 40 (1): 200–204.
Article history
Received:
July 14 2011
Citation
Patricia Moussatche, Thomas J. Lyons; Non-genomic progesterone signalling and its non-canonical receptor. Biochem Soc Trans 1 February 2012; 40 (1): 200–204. doi: https://doi.org/10.1042/BST20110638
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