Novel alternatively spliced mRNA (1c) of the protein kinase A RIα subunit is implicated in haploid germ cell specific expression

Molecular Reproduction and Development
Maria K DahleK Taskén

Abstract

By using 5' RACE on rat testis cDNA we identified three alternatively spliced mRNAs of the RIalpha subunit of cAMP-dependent protein kinase that differed in their 5' untranslated regions. Two of these 5'-regions showed similarity with the human RIalpha exons 1a and 1b, while the third (1c) constituted a novel mRNA splice variant. Northern blot analysis showed that the 1c mRNA was specifically expressed in testis and only in postmeiotic germ cells. In contrast, the RIalpha 1b and RIalpha 1a mRNAs were present both in premeiotic germ cells and somatic cells of the testis, and the expression of both RIalpha 1a and 1b mRNAs were stimulated by cAMP in Sertoli cells. In sperm, the RIalpha protein was expressed after meiosis, and targeted to various subcellular structures via anchoring proteins. The RIalpha 1c haploid-specific mRNA, therefore, may be important for the regulation of RIalpha expression in sperm.

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Citations

Jun 1, 2005·Molecular and Cellular Endocrinology·Erika PeverelliAnna Spada
Oct 3, 2002·Biochemical and Biophysical Research Communications·Jürgen NeesenIrene Mendoza-Lujambio
Oct 31, 2006·Insect Molecular Biology·D EisenhardtG Leboulle
Dec 3, 2016·Nature Communications·Heidi S FisherHopi E Hoekstra
Apr 23, 2002·Nature Reviews. Genetics·Timothy R Birkhead, Tommaso Pizzari
Aug 18, 2009·Biology of Reproduction·Gracy Xavier RosarioGeetanjali Sachdeva
Nov 29, 2002·Stem Cells·Yaron Shav-Tal, Dov Zipori

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