Molecular cloning and expression of bovine nucleoplasmin 2 (NPM2): a maternal effect gene regulated by miR-181a

Reproductive Biology and Endocrinology : RB&E
Brandon M LingenfelterJianbo Yao

Abstract

Nucleoplasmin 2 (NPM2) is an oocyte-specific nuclear protein essential for nuclear and nucleolar organization and early embryonic development. The aims of this study were to clone the bovine NPM2 gene, determine its temporal expression during oocyte development and early embryogenesis, and evaluate the potential role of miRNA-181a in regulation of its expression. A 329 bp cDNA fragment was amplified from bovine fetal ovary using primers designed based on the conserved regions of the human and mouse NPM2 cDNA sequences. RACE experiments were performed to obtain the 5' and 3' ends of the bovine NPM2 cDNA. Real time PCR and Western blot analysis were used to examine the expression of bovine NPM2 in oocytes and early embryos. Co-expression of bovine NPM2 and miRNA-181a in Hela cells was performed to determine if expression of bovine NPM2 is regulated by miRNA-181a. The bovine NPM2 cDNA is 851 bp in length encoding a protein of 200 amino acids. The protein contains the conserved bipartite nuclear localization sequence and shows 53% and 62% identity with mouse and human NPM2, respectively. Expression of bovine NPM2 mRNA is restricted to ovaries. NPM2 mRNA is abundant in GV and MII stage oocytes, decreases in early cleavage stage embr...Continue Reading

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Datasets Mentioned

BETA
FJ769182

Methods Mentioned

BETA
PCR
transfection
sumoylation

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