Intron-mediated expression of the human neuropeptide Y Y1 receptor

Molecular and Cellular Endocrinology
Ulrica MarklundA Jonas Ekstrand

Abstract

The Neuropeptide Y (NPY) family of neuropeptides exert their function through a family of heptahelical G-protein coupled receptors regulating essential physiological processes. A 97 base pair intron (intron IV) intervenes the coding sequence of the human NPY Y1 receptor (hY1) gene and was found frequently retained at variable levels in poly A+ mRNA isolated from multiple human tissues. When included in hY1 expression vectors, either in its natural position or 5' of the hY1 cDNA, intron IV mediated a significant increase of both hY1 mRNA and corresponding functional receptor protein in transfected mammalian cells, implying an in vivo regulatory function of the endogenous intron. Our results further indicate that the nuclear history of the hY1 pre-mRNA influence ectopic hY1 production through post-transcriptional mechanisms and argues against intron IV acting as a transcriptional enhancer as well as the possibility that a putative hY1 related 5TM accessory protein encoded by the non-spliced hY1 mRNA would facilitate hY1 production on a post-translational level.

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Citations

Mar 26, 2004·Insect Biochemistry and Molecular Biology·Laisel MartinezRene J Herrera
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