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A G protein-coupled receptor with low density lipoprotein-binding motifs suggests a role for lipoproteins in G-linked signal transduction.by: C. P. Tensen, E. R. Van Kesteren, R. J. Planta, K. J. Cox, J. F. Burke, H. van Heerikhuizen, E. Vreugdenhil
Proceedings of the National Academy of Sciences of the United States of America, Vol. 91, No. 11. (24 May 1994), pp. 4816-4820.
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AbstractWe have isolated and analyzed a cDNA from the central nervous system of the mollusc Lymnaea stagnalis encoding a putative receptor, which might be a natural hybrid between two different classes of receptor proteins. Preceded by a signal peptide, two types of repeated sequences are present in the N-terminal part of the protein. The first repeat displays a high sequence similarity to the extracellular binding domains of the low density lipoprotein receptor, which binds and internalizes cholesterol-containing apolipoproteins. The second repeat and the C-terminal part of the Lymnaea receptor are very similar to regions of a specific class of guanine nucleotide-binding protein-coupled receptors, the mammalian glycoprotein hormone receptors. The mRNA encoding the receptor is predominantly expressed in a small number of neurons within the central nervous system and to a lesser extent in the heart.
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