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Multimeric CREB‐binding sites in the promoter regions of a family of G‐protein‐coupled receptors related to the vertebrate galanin and nociceptin/orphanin‐FQ receptor families
Author(s) -
Saunders Susan E.,
Burke Julian F.,
Benjamin Paul R.
Publication year - 2000
Publication title -
european journal of neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.346
H-Index - 206
eISSN - 1460-9568
pISSN - 0953-816X
DOI - 10.1046/j.1460-9568.2000.00124.x
Subject(s) - nociceptin receptor , g protein coupled receptor , rhodopsin like receptors , lymnaea stagnalis , biology , galanin , receptor , class c gpcr , creb , lymnaea , gene , genetics , microbiology and biotechnology , neuropeptide , metabotropic receptor , opioid peptide , transcription factor , ecology , glutamate receptor , opioid , snail
Four related genes encoding a family of G‐protein‐coupled receptors (GPCRs) have been isolated from the mollusc Lymnaea stagnalis. The coding regions of this family of receptors share 97–99% sequence similarity at both the protein and nucleotide level, and they also share high sequence identity with vertebrate galanin and orphanin‐FQ/nociceptin GPCR families. Analysis of the promoter regions reveals shared domains, some of which encode highly conserved repeating units. One 27‐bp repeating unit, which encodes a c‐AMP response element (CRE) and binds CREB protein, is repeated 14 times in one promoter. In situ hybridization showed expression of these receptors in identified neurons of several behaviourly important networks including those involved in feeding and ion and water regulation. These Lymnaea receptors are likely to represent members of a novel family of invertebrate neuropeptide receptors extensively regulated in response to intracellular signalling cascades.