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Int. J. Mol. Sci. 2014, 15(10), 18804-18818; doi:10.3390/ijms151018804

Characterization, Expression Profile, and Promoter Analysis of the Rhodeus uyekii Vitellogenin Ao1 Gene

1
Biotechnology Research Division, National Fisheries Research and Development Institute, Busan 619-705, Korea
2
Department of Molecular Biology, Pusan National University, Busan 609-735, Korea
*
Author to whom correspondence should be addressed.
Received: 21 July 2014 / Revised: 24 September 2014 / Accepted: 11 October 2014 / Published: 17 October 2014
(This article belongs to the Section Biochemistry, Molecular and Cellular Biology)
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Abstract

The fish Vitellogenin (Vg) gene has been applied as a biomarker for exposure to estrogenic compounds in the aquatic environment. In this study, we cloned and characterized Vg cDNA from the Korean rose bitterling Rhodeus uyekii (Ru-Vg). The Ru-Vg cDNA encodes a 1424-amino-acid polypeptide that belongs to the VgAo1 family and contains a putative signal peptide, lipovitellin I, phosvitin, and lipovitellin II, but does not contain the vWFD domain or the C-terminal peptide. The deduced Ru-Vg protein has high amino acid identity (73.97%–32.17%) with fish Vg proteins. Pairwise alignment and phylogenetic analysis revealed that Ru-Vg is most closely related to Acheilognathus yamatsutae Vg. Ru-Vg transcripts were detected using quantitative polymerase chain reaction in all tissues tested, with the highest level of expression observed in the ovary. Ru-Vg mRNA was upregulated in R. uyekii hepatopancreas cells in response to treatment with 17β-estradiol (E2) or 17α-ethinylestradiol (EE2). Luciferase reporter expression, driven by the 5'-regulatory region of the Ru-Vg gene spanning from −1020 bp to the start codon was induced by the estrogen receptor and was synergistically activated by treatment with E2 or EE2. These results suggest that R. uyekii and the Ru-Vg gene may be useful as biomarkers for exposure to E2 or EE2. View Full-Text
Keywords: 17β-Estradiol; 17α-Ethinylestradiol; Korean rose bitterling; promoter assay; Rhodeus uyekii; vitellogenin 17β-Estradiol; 17α-Ethinylestradiol; Korean rose bitterling; promoter assay; Rhodeus uyekii; vitellogenin
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kong, H.J.; Kim, J.L.; Moon, J.Y.; Kim, W.-J.; Kim, H.S.; Park, J.Y.; Cho, H.K.; An, C.M. Characterization, Expression Profile, and Promoter Analysis of the Rhodeus uyekii Vitellogenin Ao1 Gene. Int. J. Mol. Sci. 2014, 15, 18804-18818.

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